Entries |
Document | Title | Date |
20080199125 | In-line optical isolator - In conventional optical isolators, an optical signal is dispersed by polarization or the characteristics are varied by heat generation in a garnet crystal. According to the invention, the crystal optical axis ( | 08-21-2008 |
20080199126 | Method for Printing a Near Field Photoinduced Stable Structure, and Optical Fiber Tip for Implementing Same - The method comprises emitting appropriate polarisation light waves on a photosensitive material for inducing therein a topographic modification through an aperture of at the most 100 mm bound by an opaque area, said layer being arranged at the most 100 mm away from the aperture. | 08-21-2008 |
20080205814 | Method and Apparatus for Dynamic Polarization Mode Dispersion Compensation - A method and a system for dynamic compensating polarization mode dispersion (PMD) in an optical communication system. An optical input signal passes through a compensating element first. A splitting device taps a fraction of the optical input signal and sends it to a monitoring element with birefringence properties. The monitoring element separates the fraction into two split signals with orthogonal principal states of polarization. The split signals are detected at photodetectors. An optimised coefficient is obtained from the detected split signals, and used to calculate an angle between a fast axis of the monitoring element and the fast axis of the optical fiber. The compensating element is set according to the determined angle to compensate the PMD. One or both of the monitoring element and the compensating element may be liquid crystal. | 08-28-2008 |
20080212916 | Polarization Maintaining Fiber Pigtail Assembly - The invention provides a fiber pigtail assembly wherein a polarization maintaining fiber is soldered directly to a mounting pad without a sleeve or a ferrule therebetween. A portion of the polarization maintaining fiber near a fiber end is embedded in a vertical slow axis orientation within an asymmetrical solder ball having a flat portion for adhering to the mounting pad. The vertical slow axis orientation of the polarization maintaining fiber within the solder ball enhances power stability and polarization extinction ratio properties of optical modules utilizing the invention. | 09-04-2008 |
20080226216 | OPTICAL DEVICES WITH INTEGRAL ISOLATORS - An isolator assembly, for use internally within a multi-port optical switch, and which operates on a preselected number of input port channels. The assembly incorporates a sequence of a birefringent crystal with a half wave plate on part of its output face acting as a linear polarizer, a 45° Faraday rotator element and a half wave plate aligned at 22.5° to the polarization direction of the light rotated by the Faraday rotator. This arrangement ensures that any light spuriously returned from a reflective beam switching element of the switch is blocked from transmission out of the paths of light which the isolator assembly covers because of the orientation of the light polarization returned to the birefringent crystal. The isolator assembly is arranged such that it does not cover the beam path leading to the output port or ports, such that legitimate output beams are transmitted unhindered. | 09-18-2008 |
20080273828 | OPTICAL MICRORESONATOR WITH RESONANT WAVEGUIDE IMPARTING POLARIZATION - An optical microresonator is formed as a microcylinder and a resonant waveguide on the microcylinder and having a plurality of spaced resonant elements such as circumferential ridges for optically coupling light from an optical source waveguide onto the microcylinder. The resonant elements have a spacing, height and angle to impart a desire polarization and bring in the polarization states into degenerancy. A coating could also be formed over the resonant waveguide and operative with the resonant waveguide and of a refractive index to bring any polarization states into degenerancy. | 11-06-2008 |
20080298739 | System and method for fabricating an optical isolator - There is provided a system and method for fabricating an optical isolator. More specifically, there is provided a fiber optical isolator comprising a first isolator stage comprising a Faraday rotator configured to adjust the polarity of a light beam, and a heat sink coupled to the Faraday rotator and configured to dissipate heat generated in the Faraday rotator by the light beam. | 12-04-2008 |
20090016668 | Apparatus and Method for a Waveguide-Based Optical Polarizer/Isolator - The present invention provides an apparatus for a one-way waveguide and/or a circular polarizer that includes a waveguide having a height, a width, a length and a wave propagation direction. A first wall of the waveguide has a first slanted groove. A second wall opposite the first wall of the waveguide has a second slanted groove. The first and second grooves are rotated clockwise around the wave propagation direction to approximate a helical groove. The present invention may also include a third slanted groove in a third wall adjacent to the first wall and second wall, a fourth slanted groove in a fourth wall opposite the third wall, and the first, second, third and fourth grooves are rotated clockwise around the wave propagation direction to approximate the helical groove. | 01-15-2009 |
20090016669 | OPTICAL COMPRESSOR AND ULTRA-SHORT PULSE LIGHT SOURCE - Provided is an ultra-short pulse light source having an optical pulse generator | 01-15-2009 |
20090052829 | OPTICAL DEVICE USING A HOLLOW-CORE PHOTONIC BANDGAP FIBER - An optical device includes a hollow-core photonic-bandgap fiber, wherein at least a portion of the hollow-core photonic-bandgap fiber has a longitudinal axis and is twisted about the longitudinal axis. | 02-26-2009 |
20090087133 | DEVICES AND METHODS FOR SPATIAL FILTERING - Methods and devices for polarizing light in a proton exchange polarizer where cross-coupling of unwanted modes of light is reduced with an integrated spatial filter. An optically transmissive substrate such as a substrate created from LiNbO | 04-02-2009 |
20090110344 | Symmetric Optical Circuit with Integrated Polarization Rotator - The present invention is directed to an on-chip symmetric optical circuit having one or more integrally fabricated polarization rotators forming a monolithic, solid state polarization independent symmetric circuit. The symmetric optical circuit has at least one integrally fabricated rotator positioned in a plane of symmetry of at least one optical fiber, waveguide or circuit path of the symmetric optical circuit. The folded symmetric optical circuit may be for example a Mach-Zehnder type optical circuit or an arrayed waveguide grating optical circuit. | 04-30-2009 |
20090180729 | CMOS-COMPATIBLE POLARIZATION-DIVERSE TUNABLE OPTICAL BANDPASS FILTER - According to one embodiment, an optical filter has a polarization rotator and two instances of an optical bandpass filter (OBPF). The first instance of the OBPF processes a TE-polarized component of an optical input signal to produce a first filtered signal. The polarization rotator then transforms the TE polarization of the first filtered signal into the TM polarization. The polarization rotator also transforms the polarization of a TM-polarized component of the optical input signal into the TE polarization. The second instance of the OBPF processes the resulting TE-polarized signal to produce a second filtered signal. The first and second filtered signals having TM and TE polarizations, respectively, are then combined to produce a filtered output signal. | 07-16-2009 |
20090185771 | Tunable Dispersion Compensator with Minimum Differential Group Delay - In a method and system for providing dispersion compensation in an optical system, there is coupled into the optical system at least one pathway into which there is connected a tunable chirped fiber Bragg grating, each such grating providing a respective tunable amount of dispersion. At least one respective DGD element is connected into the respective pathway for each such grating. The set of all such respective DGD elements in a given pathway introduces a bias differential group delay DGD | 07-23-2009 |
20090190876 | Waveguide polarizer and optical waveguide device - In the waveguide polarizer, an optical waveguide formed on a substrate includes a curved portion and there is provided an optical absorbing portion positioned on the outside in radial direction of the curved portion, and one of orthogonal polarization components of a light propagated through the optical waveguide ran out from the curved portion to the outside in radial direction is propagated through the optical absorbing portion to thereby be led to the outside of the optical waveguide, so that only the other polarization component is propagated to be output. Thus, it becomes possible to realize a miniaturized waveguide polarizer of low wavelength dependence. | 07-30-2009 |
20090202190 | OPTICAL WAVEGUIDE - When light is made incident to an optical waveguide path | 08-13-2009 |
20090202191 | Systems and Techniques for Generating Cylindrical Vector Beams - A technique is described for generating a cylindrically polarized beam, e.g., a radially or azimuthally polarized beam. An input optical fiber is provided that supports signal propagation in a fundamental LP | 08-13-2009 |
20090214152 | Polarization-maintaining optical coupler and method of making the same - Embodiments of the present invention provide an optical coupler. The optical coupler includes a fused optical coupling region made of part of a first and a second single-mode (SM) fiber, with a portion of the second SM fiber being a pigtail fiber on a first side of the fused optical coupling region; and a first and a second polarization-maintaining (PM) fiber on the first side and a second side of the fused optical coupling region respectively. Methods of making the optical coupler and system that utilizes the optical coupler are also provided. | 08-27-2009 |
20090214153 | IN-LINE POLARIZATION-STATE CONVERTER - The invention discloses an in-line polarization-state converter. In the polarization converter, a laser beam is radiated onto the side of a photosensitive optical fiber. The laser beam causes the refractive index of an optical fiber core to asymmetrically vary. Birefringence is induced in a core mode of the optical fiber by the variation in the asymmetrical refractive index. An optical fiber segment having the birefringence is generally disposed on a waveguide path of the optical fiber to change the polarization state of an optical signal passing through the optical fiber segment. That is, the phase of the optical signal passing through the optical fiber is changed by radiation of laser beams, which results in a variation in polarization state. The polarization converter disposed on the waveguide path is covered with a metal tube in order to prevent the polarization converter from being bent or broken. In addition, optical fiber connectors are provided at both ends of the polarization converter for easy connection. | 08-27-2009 |
20090220186 | Hollow-core photonic bandgap fiber polarizer - A hollow-core photonic bandgap fiber polarizer may include a core, an inner cladding surrounding the core, the inner cladding including a plurality of capillaries, and an outer cladding at least partially surrounding the inner cladding. A section of the capillaries distal to the core is asymmetric relative to a section of the capillaries proximal to the core. | 09-03-2009 |
20090232441 | Polarized Light Mode Converter - The present invention provides a polarized light mode converter which can be provided within a two-dimensional photonic crystal or can be smoothly connected to a two-dimensional photonic crystal. In a two-dimensional photonic crystal made of a slab-like main body provided with a plurality of different refractive index regions (for example, holes | 09-17-2009 |
20090274410 | ELECTROOPTIC PROBE FOR MEASURING TEMPERATURE AND ELECTROMAGNETIC FIELD - A device for measuring an electromagnetic field and the temperature in an analysis zone includes a light source for sending a light beam into a polarization-maintaining optical fiber. The light beam is directed along one axis of the fiber. An anisotropic electrooptic material is placed in the zone for receiving the beam from optical fiber and for sending the beam into the fiber. The device further includes an arrangement for analyzing the intensity of the linear wave and a mechanism for determining the variations in the orientation of the linear wave output by phase-shifting means. A quarter-wave plate is inserted between the optical fiber and the crystal, wherein the plate has its axes oriented at substantially 45° to the axes of the optical fiber. | 11-05-2009 |
20090324159 | OPTICAL CHIRAL FIBER ISOLATOR AND METHOD OF FABRICATION THEREOF - The present invention provides an optical in-fiber chiral fiber isolator, capable of transmitting a signal of a predetermined optical polarization in a forward direction therethrough, while rejecting all signals traveling in a backward direction therethrough, and a method of fabrication thereof. In one exemplary embodiment, the inventive optical chiral fiber isolator includes a chiral magneto-optical fiber having a helical pitch profile, a birefringence profile, and an effective Verdet constant profile, at least a portion of which is exposed to a magnetic field of a predetermined magnetic field profile (generated by a proximal magnetic field source), where the magnetic field profile, the chiral pitch profile, the birefringence profile, and the effective Verdet constant profile are selected and configured such that the inventive isolator is capable of transmitting a signal of a predetermined optical polarization in a direction from its input end toward its output end, and to reject all signals in a direction from its output end to its input end. | 12-31-2009 |
20100002980 | Polarization-dependent hollow-core optical fibers - In accordance with one aspect of my invention, the core and cladding regions of a hollow-core optical fiber are configured so that a signal mode is coupled to a cladding mode in order to exploit polarization-dependent properties. In general, the fiber comprises a hollow-core region surrounded by a cladding region, which includes a localized hollow-waveguide region. The core and waveguide regions are configured so that the coupling between a signal mode in the core region and a cladding mode in the waveguide region are phase-matched for efficient coupling, and the phase-matching condition is made polarization-dependent to provide improved control of the fiber's polarization dependent properties. In a preferred embodiment, the cladding region comprises a bandgap structure. In one embodiment, the at least one region has a non-symmetric cross-sectional shape (e.g., oblong) with respect to one of its transverse axes. In an alternative embodiment, both the core region and the waveguide region are non-symmetric but with respect to orthogonal axes. In another embodiment, the at least one region has a multiplicity of micro-defects disposed at or near the periphery thereof and in a non-rotationally-symmetric pattern. In an alternative embodiment, both the core region and the waveguide region include a multiplicity of micro-defects at or near the periphery thereof in a non-rotationally-symmetric pattern. Optical fibers of this type find application in polarization-dependent optical couplers (e.g., splitters, polarizers) and in sensors. | 01-07-2010 |
20100008617 | METHODS AND SYSTEMS FOR ELIMINATING DELETERIOUS POLARIZATION EFFECTS IN AN OPTICAL FIBER DISPERSION COMPENSATION MODULE - The present invention provides methods and systems for mitigating polarization changes associated with an optical communication signal caused by mechanical disturbances to an optical fiber dispersion compensation module of an optical communication network. The methods include disposing a first damping material between an optical fiber and a housing associated with the optical fiber dispersion compensation module; wherein the first damping material is selected and positioned such that it mitigates relatively fast polarization changes. Optionally, the methods also include disposing a second damping material between the optical fiber and the housing associated with the optical fiber dispersion compensation module; wherein the second damping material is selected and positioned such that it mitigates relatively slow polarization changes. Thus, frequency range specific optical fiber dispersion compensation module mechanical perturbation isolation methods and systems are provided. | 01-14-2010 |
20100014802 | COHERENT OPTICAL MIXER AND A METHOD OF COHERENT DETECTION OF LIGHT - A coherent planar lightwave circuit (PLC) optical mixer chip is described comprising a matched pair of symmetrical four-coupler interferometers for in-phase and in-quadrature detection of two polarization components of light using a polarization diversity arrangement. The waveguide structure of the chip is symmetrical about two orthogonal central axes of the chip, whereby the effect of temperature gradients on the mixer is reduced. A light traveling from an input to an output of any of the two interferometers is cross-coupled by one of the two couplers it passes through, and is bar-coupled by the other of the two couplers, so as to compensate for polarization, wavelength, and manufacturing process dependence of bar-coupling with that of cross-coupling. | 01-21-2010 |
20100021105 | OPTICAL SIGNAL PROCESSING DEVICE - An optical signal processing device has nonlinear optical medium, first and second power controllers, and polarization controllers. To the nonlinear optical medium, signal light, and first and second pumping lights having wavelengths different from the signal light are input. The first and the second power controllers are provided at the input side of the nonlinear optical medium, and control the powers of the first and the second pumping lights so that a predetermined gain is obtained in the nonlinear optical medium. The polarization controllers are provided at the input side of the nonlinear optical medium, and adjust the first and the second pumping lights so that the polarization states of the first and the second pumping lights are mutually orthogonal. | 01-28-2010 |
20100074571 | OPTICAL WAVEGUIDE ELEMENT AND METHOD FOR POLARIZATION SPLITTING - Disclosed is an optical waveguide element that includes first and second optical waveguides ( | 03-25-2010 |
20100092124 | Resonant Leaky-Mode Photonic Elements and Methods for Spectral and Polarization Control - Optical devices with versatile spectral attributes are provided that are implemented with one or more modulated and homogeneous layers to realize leaky-mode resonance operation and corresponding versatile spectral-band design. The first and/or higher multiple evanescent diffraction orders are applied to excite one or more leaky modes. The one- or two-dimensional periodic structure, fashioned by proper distribution of materials within each period, can have a resulting symmetric or asymmetric profile to permit a broadened variety of resonant leaky-mode devices to be realized. Thus, the attributes of the optical device permit, among other things, adjacent, distinct resonance frequencies or wavelengths to be produced, convenient shaping of the reflection and transmission spectra for such optical device to be accomplished, and the wavelength resonance locations to be precisely controlled so as to affect the extent to which the leaky modes interact with each other. Further, the profile asymmetry allows for the precise spectral spacing of interactive leaky modes so as to provide greater flexibility in optical device design. | 04-15-2010 |
20100092125 | Optical structure on an optical fiber and method of fabrication - An optical structure on an optical fiber and a method of fabrication is provided. The optical structure includes an end of an optical fiber and a layer formed on the end of the optical fiber. The layer comprises one or more first portions having a first optical pathlength in a direction perpendicular to the layer and one or more second portions having a second optical pathlength in the direction perpendicular to the layer, the second optical pathlength different from the first optical pathlength. | 04-15-2010 |
20100104236 | WIDE BAND MICROWAVE PHASE SHIFTER - The invention relates to a phase shifting device for switching the polarization state of an electromagnetic wave. Two waveguide sections have an exterior rectangular opening defined in their end surfaces. A dielectric break is situated substantially collinearly with the longitudinal axis of the waveguide in substantially a center of the waveguide. In one embodiment, a central structure includes a cylinder having a permeability greater than that of a vacuum, and having two substantially circular end faces situated in perpendicular orientation to a longitudinal axis of the cylinder and two dielectric cones. A magnetic field source switches a polarization of the electromagnetic wave causing a phase shift of the electromagnetic wave of substantially zero degrees when the controllable magnetic field is off and a pre-determined phase shift when the controllable magnetic field is on. The invention can be used in an interferometer apparatus and a phased array apparatus. | 04-29-2010 |
20100104237 | WAVEGUIDE-TYPE OPTICAL INTERFEROMETER - In an optical interferometer, polarization dependence attributable to the optical path difference has conventionally been eliminated by inserting a half-wave plate at the center of the interferometer. However, light induced by polarization coupling produced in directional couplers used in the optical interferometer causes interference having different interference conditions from those of the normal light. Polarization rotators that effect any one of 90° rotation and −90° rotation of all states of polarization of incoming light are inserted in the optical interferometer, and thereby the interference conditions of light induced by polarization coupling are made the same as those of the normal light. Each of the polarization rotators is implemented by using two half-wave plates and by varying an angle of combination of these half-wave plates. Alternatively, each of the polarization rotators is implemented through a combination of one half-wave plate and a waveguide having birefringence properties. | 04-29-2010 |
20100254649 | MONITORING eDC POLARIZATION INVERSE FILTER COEFFICIENTS TO IDENTIFY REAL-TIME PHYSICAL INTRUSION INTO A CORE OR METRO OPTICAL NETWORK - A fiber network is monitored in order to detect physical intrusion. The state of polarization of an optical fiber is monitored. A fiber tap is determined to have occurred if the state of polarization of the fiber changes beyond a predetermined amount found to be associated with all types of fiber taps. Alternately, it may be determined that a fiber tap has occurred if the state of polarization changes beyond a second predetermined amount and in a predetermined direction. Monitoring of the state of polarization occurs before and after a time period chosen to be less than a time during which the state of polarization of the optical fiber is expected to drift. This step eliminates false positives due to natural fiber PMD drift. | 10-07-2010 |
20100303402 | Phase-Engineered Fibers for Use in Generating Cylindrical Vector Beams - A phase-engineered fiber is described for generating a cylindrically polarized beam. The fiber includes a core region, a ring region surrounding the core region, and an outer cladding region surrounding the ring region. The fiber regions are configured to cause the fiber to have a refractive index step proximate to the peak amplitude value of the mode intensity profile of an LP | 12-02-2010 |
20110002579 | Polarization Maintaining Optical Fiber Polarizer - A novel in-fiber polarizer is provided that is implemented in an optical fiber structure based on a polarization maintaining (“PM”) optical fiber, and that is configured to impart a predetermined desired polarization to a light signal transmission of a predetermined at least one wavelength transmitted therethrough. The inventive polarizer comprises a PM optical fiber structure, with an entry end for receiving incident light and an exit end for outputting polarized light, having an optical fiber core, having at least one core mode and a core propagation constant, surrounded by a cladding, having at least one cladding mode and a cladding propagation constant, that further comprises a reduced core diameter region of a predetermined length between its entry and exit ends, wherein various predefined parameters of the modified PM optical fiber structure, including but not being limited to, the core and cladding propagation constants, the value of the reduced core diameter, and the length of the reduced core diameter region are selected and configured to produce a constructive interference for one light polarization of the input light signal, corresponding to the desired polarization, and to produce a destructive interference for a polarization orthogonal to the desired polarization, to thereby only output, at the polarizer exit end, the desired polarization component of the light signal transmission at the at least one wavelength. Additional embodiments of the inventive polarizer include multiple sequential polarizer structures with specially configured interconnects. | 01-06-2011 |
20110002580 | OPTICAL FIBER - The present invention relates to an optical fiber, wherein PMD will not significantly increase even when an external factor, such as a lateral pressure, a bending and the like, is applied to the optical fiber. The optical fiber is imparted with a twist that is an elastic torsion with stress. In the condition that a twist rate, being the number of rotations per unit length by the twist, is represented by f(z) as a function of a position z in a longitudinal direction of the optical fiber, which has a predetermined twist cycle and is defined such that, in one twist cycle, a twist rotation angle in one direction and a twist rotation angle in the opposite direction are equal to each other, when a proportionality coefficient representing circular birefringence per twist rate is denoted by g, an angular frequency is denoted by ω, and external linear birefringence due to a bending and a lateral pressure is denoted by β | 01-06-2011 |
20110019958 | Polarization-Independent Optical Isolator - It is provided a polarization-independent optical isolator without depending on the polarized wave of the light being input to the waveguide-type optical isolator, in particular, it is able to completely isolate the propagating light of the backward direction. | 01-27-2011 |
20110103736 | POLARIZATION-INDEPENDENT WAVEGUIDE-TYPE OPTICAL INTERFERENCE CIRCUIT - A Mach-Zehnder interferometer circuit ( | 05-05-2011 |
20110110619 | TUNABLE DISPERSION COMPENSATOR WITH MINIMUM DIFFERENTIAL GROUP DELAY - In a method and system for providing dispersion compensation in an optical system, there is coupled into the optical system at least one pathway into which there is connected a tunable chirped fiber Bragg grating, each such grating providing a respective tunable amount of dispersion. At least one respective DGD element is connected into the respective pathway for each such grating. The set of all such respective DGD elements in a given pathway introduces a bias differential group delay DGD | 05-12-2011 |
20110129179 | HIGHLY RARE-EARTH DOPED FIBER - A multicomponent glass fiber having a doping concentration of 55%-85% (wt./wt.) of a rare-earth oxide is presented. The rare-earth oxide is selected from the group comprising: Pr | 06-02-2011 |
20110129180 | HIGHLY RARE-EARTH DOPED FIBER ARRAY - An all-fiber Faraday rotator array comprising a plurality of Faraday rotating fibers, each having a doping concentration of 55%-85% (wt./wt.) of a rare-earth oxide, and a magnetic tube surrounding the plurality of Faraday rotating fibers is presented. The rare-earth oxide is selected from the group comprising: Pr | 06-02-2011 |
20110150384 | OPTICAL INTEGRATED CIRCUIT - Consistent with the present disclosure, a non-adiabatic polarization rotator is provided that can rotate the polarization of an incoming over a relatively short length. Light is supplied to the polarization rotator via a polarizer, which insures that the optical input to the polarization polarization rotator has a desired polarization. Preferably, the polarization rotator has a structure that is readily implemented with semiconductor materials and can be fabricated with known processing techniques. In addition, the polarization rotator and polarizer may include similar materials and/or layers, such that both may be readily integrated on a common substrate, such as an indium phosphide (InP) substrate. | 06-23-2011 |
20110150385 | POLARIZATION MAINTAINING LARGE CORE HOLLOW WAVEGUIDES - A system and method for guiding polarized light is disclosed. One system comprises a large core hollow waveguide having first and second dimensions that are substantially perpendicular. The first and second dimensions are orthogonal to a direction of travel of light in the waveguide. A length of the first dimension is substantially greater than a length of the second dimension to enable light waves with an electric field approximately parallel with the first dimension to propagate through the waveguide with substantially less loss than light waves that have an electric field approximately parallel with the second dimension. | 06-23-2011 |
20110158579 | MULTI-STAGE POLARIZATION ROTATOR - Consistent with the present disclosure, a rotator is provided that includes multiple stages, each of which including waveplate and delay sections. The waveplate and delay sections each exhibit birefringence and have polarization eigen states that are tilted with respect to each other. The lengths of the delay and waveplate sections are selected such that, for example, a relatively high extinction ratio can be achieved over a relatively wide range of fabrication perturbations to the waveplates or delay sections and over a relatively wide range of wavelengths. Accordingly, the rotator consistent with the present disclosure is more tolerant of deviations in the optical signal polarization. | 06-30-2011 |
20110170822 | Integrated optical polarizer for silicon-on-insulator waveguides - A silicon-on-insulator device has a waveguide having a carrier wafer layer, a buffer layer, a guiding layer, and a cladding layer. The silicon-on-insulator is additionally provided with a polarizing arrangement deposited on a predetermined portion of the waveguide, the polarizing arrangement being provided with a bottom metal layer, a dielectric gap, and a top metal layer, the bottom metal layer being deposited on the cladding layer. A protection layer formed of SiO | 07-14-2011 |
20110194804 | INTEGRATED OPTICAL COUPLER - An integrated optical coupler including in the medium separating a first integrated waveguide from a second substantially parallel integrated waveguide, a succession of strips parallel to one another and orthogonal to the general direction of the waveguides, said strips being made of a material having an absorption preventing the propagation of an electromagnetic wave across its volume, and having:
| 08-11-2011 |
20110206314 | Method for Generating a Spectral Broadband Source by Phase Matching Including Leaky Modes - The disclosure relates to an optical waveguide serving to propagate an original light signal, the optical waveguide including a non-linear waveguide first core that is suitable for generating leaky modes from the original light signal, the waveguide including at least a second core, the first core being included in the second core, the second core being arranged relative to the first core in such a manner as to confine at least the leaky modes generated by the first core from the original light signal outside the first core. By the above-described waveguide, in particular by the non-linearities of the first core of the waveguide, a light continuum can be generated inside the fiber by collinear phase matching. In addition, by Cerenkov effect, other wavelengths are generated by the wavelengths of the continuum by non-collinear phase matching. | 08-25-2011 |
20110243493 | Waveguide-type polarizer - The waveguide-type polarizer includes: a Z-cut lithium niobate substrate; an optical waveguide having a ridge structure and formed on the substrate; a low refractive index film formed with a thickness satisfying 0≦n·t/λ≦0.3742 (where n is a refractive index, t (μm) is the thickness of the film, and λ (μm) is the wavelength of a light wave) on the side of the ridge structure; and a high refractive index film formed with a thickness satisfying 0.089≦n·/λ on the low refractive index film. The width of the ridge structure is a ridge width where the distribution of ordinary light of the light waves propagated through the optical waveguide changes and the distribution of extraordinary light of the light waves does not change, the angle of the ridge structure is less than 90°, and the waveguide-type polarizer has a function of transmitting extraordinary light. | 10-06-2011 |
20110268383 | Polarization Maintaining Optical Rotary Joint - An optical rotating data transmission device for polarization-maintaining transmission of linearly polarized light includes at least one first collimator for coupling on first light-waveguides, and also a second collimator for coupling on second light-waveguides, the second collimator being supported to be rotatable relative to the first collimator about a rotation axis. At least two λ/4 plates for converting linear polarization to circular polarization and vice-versa are provided in between a plate for attaching optical fibers and a micro lens system. | 11-03-2011 |
20120002912 | FABRICATION TOLERANT POLARIZATION CONVERTER - The present invention provides a polarization converter, and a method for fabricating the same. The polarization converter includes a geometric shape which induces rotation of a polarization of an optical signal from a first polarization state to a second polarization state as the optical signal propagates along the polarization converter. The performance of the polarization converter is maintained in light of inconsistencies in fabrication processes resulting in improved manufacturability. | 01-05-2012 |
20120033911 | DELIVERING LIGHT VIA OPTICAL WAVEGUIDE AND MULTI-VIEW OPTICAL PROBE HEAD - Techniques, apparatus and systems that use an optical probe head to deliver light to a target and to collect light from the target for imaging, monitoring, medical diagnostics and medical treatment applications. | 02-09-2012 |
20120063716 | Wideband Interferometer Type Polarized Light Combiner and Splitter - A interferometer type polarization beam combiner and splitter, which can combine or split polarized light over a wide band, is provided. The interferometer type polarization beam combiner and splitter includes: an optical splitter; an optical coupler; an optical path length difference imparting unit, which includes a plurality of optical waveguides arranged between the optical splitting unit and the optical coupling unit; one or two input/output ports connected to the optical splitter; and two input/output ports connected to the optical coupler. A half-integer of a wavelength of λc is set as a normalized phase difference, for the optical path length difference imparting unit, between two polarization states, and means for generating a difference in refractive index dispersion is provided between the optical waveguides of the optical path length difference imparting unit, so that the change rate of the transmittance with respect to wavelength is suppressed for the two polarization states. | 03-15-2012 |
20120082410 | Hybrid Waveguide Device in Powerful Laser Systems - A hybrid waveguide device includes a hollow core fiber having a core formed by a combination of solid material and gases. The hybrid nature of the core allows the hybrid device to transport a high energy high power laser beam having an ultra-short pulse width without damage to the hybrid device due to a higher tolerance of irradiance than single-matter cores. A waveguide device having a core with gases in addition to solid matter is characterized by a lower nonlinear refractive index coefficient (n | 04-05-2012 |
20120163751 | REFLECTION TYPE OPTICAL DELAY INTERFEROMETER APPARATUS BASED ON PLANAR WAVEGUIDE - A reflective type optical delay interferometer includes a coupler to divide an optical signal into two optical signals; a first optical waveguide connected to the coupler, to have a first optical delay path for transmitting a first optical signal which is one of the two optical signals; a second optical waveguide connected to the coupler, to transmit a second optical signal which is the other of the two optical signals and to have an optical delay path asymmetrical to the first optical delay path; and first and second polarization rotation reflection devices respectively connected to the first and second optical waveguides, wherein the first polarization rotation reflection device rotates polarizations of the first optical signal and the reflected first optical signal and the second polarization rotation reflection device rotates polarizations of the second optical signal and the reflected second optical signal. | 06-28-2012 |
20120189241 | Chiral Fiber Circular Polarizer - The inventive circular chiral fiber polarizer is operable to convert linearly polarized light to circularly polarized light, may be advantageously fabricated in an “in-fiber” manner and to comprise desirable extinction ratio characteristics, and may also serve as an interface between a sequentially positioned polarization maintaining (PM) fiber, and a single mode (SM) fiber. | 07-26-2012 |
20120189242 | Multi-state Polarization Preserving Optical Fiber - The inventive chiral polarization preserving optical fiber utilizes a structure composed of specially positioned and configured single mode (SM) and conventional polarization maintaining (PM) fiber elements along with at least two novel circular chiral fiber polarizers (each operable to convert linearly polarized light to circularly polarized light), to preserve any arbitrary polarization state of light signals transmitted therethrough without the limitations and drawbacks of other polarization maintaining solutions. In another inventive embodiment thereof, the inventive chiral polarization preserving optical fiber is configured as an arbitrary polarization state maintaining light signal splitter. | 07-26-2012 |
20120213465 | METHOD FOR MAKING POLARIZATION ROTATOR AND THE POLARIZATION ROTATOR MADE THEREBY - A method for making a polarization rotator includes the steps of forming a structure including a semiconductor substrate and a mesa part, forming a first semiconductor layer on a main surface of the semiconductor substrate and around the mesa part, forming a second semiconductor layer on the first semiconductor layer, forming a semiconductor laminate by forming a third semiconductor layer on the second semiconductor layer, forming a mask layer on the third semiconductor layer, forming a mesa including a first semiconductor core by etching the semiconductor laminate, and forming a first semiconductor cladding by forming a fourth semiconductor layer around the mesa. The first semiconductor core and the first semiconductor cladding form a polarization rotating unit. An inclined surface of a mesa-part-adjacent portion extends in a second direction forming an acute angle with the main surface. An inclined portion of the second semiconductor layer extends in the second direction. | 08-23-2012 |
20120237157 | POLARIZATION INTERFERENCE OPTICAL INTERLEAVER - The present patent application relates to a polarization interference optical interleaver, which includes a first port to transmit the first optical signal through the first optical path, a second port to transmit the second optical signal and a third port to transmit the third optical signal. The first optical signal passes through the first optical path and splits into the second optical signal and the third optical signal by the first and the second light splitting/combining crystals and the interference crystal group. The interference crystal group is located between the first and the second light splitting/combining crystals. The second optical signal and the third optical signal are received and reflected by a reflecting mirror. Then the second optical signal and the third optical signal output through the second port and the third port respectively. The second optical signal reflected by the reflecting mirror transmits along the first optical path of the first optical signal and passes through the interference crystal group, then walks off the first optical path by light walk-off device and outputs through the second port. The third optical signal reflected by the reflecting mirror transmits along the second optical path and passes through the interference crystal group, then outputs through the third port. There are only four beams in the interference crystal group of the present patent application. So the volume of the interference crystal group is minimized and the cost is reduced. | 09-20-2012 |
20120243821 | TUNABLE OPTICAL FILTER UTILIZING A LONG-RANGE SURFACE PLASMON POLARITON WAVEGUIDE TO ACHIEVE A WIDE TUNING RANGE - An optical filter and a method for fabricating an optical filter with a wide tuning range and a structure subject to miniaturization. The optical filter includes a bottom and a top dielectric layer with a stripe or film of metal between the dielectric layers which have dissimilar refractive index dispersion. The stripe of metal functions as a waveguide supporting a long-range surface plasmon polariton mode which will be achieved at wavelengths for which the refractive indices of the dielectric layers are the same thereby providing a bandpass filter. Furthermore, one of the dielectric layers is made of a material that allows its refractive index to be tuned, such as by changing its applied voltage or temperature. By tuning the refractive index of the dielectric layer, the wavelength at which the refractive indices of the dielectric layers match changes thereby effectively tuning the optical filter. | 09-27-2012 |
20120328230 | OPTICAL FIBER MULTI-WAVELENGTH FILTER AND METHOD OF CONTROLLING WAVELENGTH OF SPECTRUM USING THE SAME - An optical fiber multi-wavelength filter based on a polarization-diversity loop configuration within which polarization-maintaining fibers are contained with some optical elements is disclosed. The filter includes a coil heater adjacent to polarization-maintaining fibers. An ambient temperature of the polarization-maintaining fiber is controlled by adjusting a current applied to the coil heater. | 12-27-2012 |
20130011094 | OPTO-ELECTRIC CIRCUIT BOARD INCLUDING METAL-SLOTTED OPTICAL WAVEGUIDE AND OPTO-ELECTRIC SIMULTANEOUS COMMUNICATION SYSTEM - Disclosed are an opto-electric circuit board including a metal-slotted optical waveguide and an opto-electric simultaneous communication system. The opto-electric circuit board includes a lower metal thin film; a dielectric substance formed above the lower metal thin film; an upper metal thin film formed above the dielectric substance; and intermediate metal thin films that form optical waveguides at a predetermined interval on the same plane in the dielectric substance. | 01-10-2013 |
20130028553 | 2-PATTERN COMPOUND PHOTONIC CRYSTALS WITH A LARGE, COMPLETE PHOTONIC BAND GAP - 2-pattern photonic crystal and the associated photonic devices are described here. A 2-pattern photonic crystal has a large, complete photonic band gap. It includes a TM sub-structure providing a large TM photonic band gap superimposed on a TE sub-structure providing a large TE photonic band gap. The resulting 2-pattern photonic crystals have complete photonic band gaps larger than 15%, By altering the respective sub-structures, optical devices for different polarizations (TE, TM or both) can be readily designed, and those optical devices can be integrated on the same plane. | 01-31-2013 |
20130064493 | MULTI-FIBER POLARIZATION SCRAMBLER/CONTROLLER - A system and method for applying polarization scrambling through a device to a plurality of fiber optic cables by applying a compressive load simultaneously to each of the plurality of fiber optic cables in order to scramble polarization to each of the plurality of fiber optic cables simultaneously. | 03-14-2013 |
20130071060 | POLARIZER - A polarizer includes: a substrate; a dielectric layer positioned on the substrate; an optical waveguide positioned in the dielectric layer and for transmitting incident light; and a graphene layer positioned corresponding to the optical waveguide. | 03-21-2013 |
20130077911 | SPATIAL DIVISION MULTIPLEXING OPTICAL MODE CONVERTER - Embodiments provide an optical device that includes a star coupler, a polarization bam splitter (PBS) and a polarization rotator. The star coupler includes a port at a first end face. The polarization beam splitter is optically coupled via a first side to the star coupler port, and is further optically coupled via a second side to a first port of an optical coupler. The polarization rotator is optically coupled between the polarization beam splitter and a second port of the optical coupler. | 03-28-2013 |
20130101248 | Polarization Independent Wavelength Converter And Polarization Independent Wavelength Conversion Method - A polarization independent wavelength converter includes a polarization maintaining optical fiber which includes a first and a second ends and has a first polarization axis and a second polarization axis, the first and the second polarization axes being orthogonal to each other and propagating light at different velocities, and a group velocity difference cancellation unit that receives a signal light having a certain polarization state and a pump light including a polarization component parallel to the first polarization axis and a polarization component parallel to the second polarization axis and that causes the signal light and a wavelength-converted light generated in the polarization maintaining optical fiber by the signal and the pump lights to pass through the polarization maintaining optical fiber in a manner not to be influenced by a group velocity difference of each of the signal and the wavelength-converted lights between the first and the second polarization axes. | 04-25-2013 |
20130108206 | POLARIZATION MAINTAINING MULTI-CORE OPTICAL FIBER | 05-02-2013 |
20130121632 | SOA-PLC HYBRID INTEGRATED POLARIZATION DIVERSITY CIRCUIT AND METHOD FOR MANUFACTURING THE SAME - The invention of the present application provides an SOA-PLC hybrid integrated polarization diversity circuit including a PLC-PBS chip and an SOA-COS whose respective waveguides are coupled to each other. The PLC-PBS chip includes: first and second optical waveguides; a Mach-Zehnder interferometer circuit; and a half-wave plate placed in the first optical waveguide which TM mode light is split into. The SOA-COS includes: a third optical waveguide connected to the first optical waveguide; a fourth optical waveguide connected to the second optical waveguide; and an SOA formed in at least one of the third and fourth optical waveguides. One end of the third optical waveguide and one end of the fourth optical waveguide are connected to a U-turn optical waveguide, the one ends being not connected to the first optical waveguide and the second optical waveguide, respectively. | 05-16-2013 |
20130129272 | Faraday Rotator and Isolator - An all-fiber optic Faraday rotator and isolator is presented. The device has a multicomponent glass optical fiber having a core having a first doping concentration of 55%-85% (wt./wt.) of a first rare-earth oxide and a cladding having a section doping concentration of 55%-85% (wt./wt.) of a second rare-earth oxide, where the first rare-earth oxide and the second rare earth oxide are one or more of Pr | 05-23-2013 |
20130129273 | POLARIZATION SEPARATION ELEMENT AND OPTICAL INTEGRATED ELEMENT - A polarization separation element of an optical waveguide type formed on a substrate includes: an input-light demultiplexer; an output-light multiplexer; a first arm waveguide and a second arm waveguide that connect the input-light demultiplexer and the output-light multiplexer, each of the first and second arm waveguides including an optical waveguide having birefringence; and at least one heating unit formed above each of the first arm waveguide and the second arm waveguide, wherein a geometric length of the second arm waveguide is larger than a geometric length of the first arm waveguide by equal to or less than a degree corresponding to an amount of increase in an optical path length generated in the first arm waveguide when the at least one heating unit performs heating on the first arm waveguide to impart birefringence to the first arm waveguide. | 05-23-2013 |
20130136389 | OPTICAL DEVICE WITH ECHELLE GRATING AND WAVEFRONT TAILORING - An optical de-MUX includes a sub-wavelength grating that magnifies an input optical signal. In particular, along a direction perpendicular to a propagation direction of the optical signal, the sub-wavelength grating has a spatially varying effective index of refraction that is larger at a center of the sub-wavelength grating than at an edge of the sub-wavelength grating. Moreover, the optical de-MUX includes an optical device that images and diffracts the optical signal using a reflective geometry, and which provides different diffraction orders to output ports. For example, the optical device may include an echelle grating. | 05-30-2013 |
20130142474 | SYSTEMS AND METHODS FOR PHOTONIC POLARIZATION BEAM SPLITTERS - An integrated photonic polarization beam splitter includes an optical coupler having an input port, a first output port, and a second output port. The optical coupler is operable to couple a portion of an input light beam at the input port into the first output port and another portion of the input light beam into the second output port. The integrated photonic polarization beam splitter also includes a first waveguide having a first linear polarizer embedded therein and coupled to the first output port of the optical coupler and a second waveguide having a second linear polarizer embedded therein and coupled to the second output port of the optical coupler. | 06-06-2013 |
20130142475 | SYSTEMS AND METHODS FOR PHOTONIC POLARIZATION ROTATORS - A waveguide polarization rotator includes a substrate having a surface and a waveguide coupled to the surface of the substrate and operable to support a light beam along a direction of beam propagation. The waveguide includes a slab having a support surface and a second surface opposing the support surface and a rib protruding from the second surface of the slab in a direction substantially normal to the surface of the substrate and extending along the direction of beam propagation. The rib includes a first portion extending to a first height above the second surface of the slab and a second portion adjacent to the first portion and extending to a second height above the second surface of the slab. The second height is less than the first height. | 06-06-2013 |
20130142476 | SYSTEMS AND METHODS FOR PHOTONIC POLARIZATION-SEPARATING APPARATUSES FOR OPTICAL NETWORK APPLICATIONS - An integrated photonic polarization-separating apparatus includes a first waveguide polarization beam splitter (PBS) having a first port, a second port, a third port, and a fourth port and a first polarization rotator optically coupled to the first port of the first waveguide PBS. The apparatus also includes a first Faraday rotator optically coupled to the first polarization rotator and a second polarization rotator optically coupled to the second port of the first waveguide PBS. The apparatus further includes a second Faraday rotator optically coupled to the second polarization rotator and a second waveguide PBS having a first port, a second port, a third port, and a fourth port. The third port is optically coupled to the first Faraday rotator and the fourth port is optically coupled to the second Faraday rotator. | 06-06-2013 |
20130156361 | Mode-Evolution Compound Converter - A mode-evolution compound converter for processing an optical signal that includes a first component having a fundamental transverse magnetic (TM) mode and a second component having a fundamental transverse electric (TE) mode is disclosed. The compound converter includes a set of multiple converters connected to form a compound converter, wherein each converter is a mode-evolution converter selected from a group including a polarization converter, a spatial converter, and combination thereof, wherein the polarization converter at least converts a mode of a polarization of at least one component of the optical signal, and the spatial mode converter at least converts a spatial mode order of at least one component of the optical signal. | 06-20-2013 |
20130156362 | CORE AND OPTICAL WAVEGUIDE - Provided is a core which reduces optic splice loss between discontinuous optical waveguides. The core includes a first waveguide propagation portion having first light-receiving width, a first lightwave discontinuous portion having second light-receiving width, a first taper structure portion having both ends connected to the first lightwave propagation portion and to the first lightwave discontinuous portion, respectively and decreasing in light-receiving width as it goes from the first lightwave propagation portion to the first lightwave discontinuous portion, a second lightwave propagation portion having third light-receiving width, a second lightwave discontinuous portion having fourth light-receiving width, and a second taper structure portion having both ends connected to the second lightwave propagation portion and to the second lightwave discontinuous portion, respectively and decreasing in light-receiving width as it goes from the second lightwave propagation portion to the second lightwave discontinuous portion. | 06-20-2013 |
20130163914 | SYSTEM FOR GENERATING A BEAT SIGNAL - The invention relates to a system ( | 06-27-2013 |
20130177272 | Systems And Methods For Reducing Off-Axis Optical Aberrations In Wavelength Dispersed Devices - Through its higher refractive index, a silicon grism can be used to reduce the Described herein are systems and methods for reducing optical aberrations in an optical system to decrease polarization dependent loss. Embodiments are provided particularly to define beam trajectories through an optical switching system which reduce off-axis aberrations. In one embodiment, a silicon grism is provided for reducing the curvature of the focal plane at an LCOS device in a wavelength selective switch (WSS) such that the separated polarization states converge at the LCOS at substantially the same point along the optical axis for all wavelengths. In this embodiment, an axial offset at the LCOS device will not produce large PDL at the coupling fibers. In another embodiment, a coupling lens having an arcuate focusing region is provided to address an offset in the optical beams, such that the separated polarization states couple symmetrically to respective output fibers. | 07-11-2013 |
20130177273 | Cylindrical Vector Beam Generation From A Multicore Optical Fiber - A multicore optical component and corresponding methods of converting a linearly or circularly polarized Gaussian beam of light into a radially or azimuthally polarized beam of light are provided. The multicore optical component comprises a plurality of birefringent, polarization maintaining elliptical cores. The elliptical cores collectively define an azimuthally varying distribution of major axes where the orientation of the major axis of a given elliptical core is given by φ=(180/N)*n+θ where n is the core number and θ is any angle greater than 0°. | 07-11-2013 |
20130182993 | MONITORING eDC POLARIZATION INVERSE FILTER COEFFICIENTSW TO IDENTIFY REAL-TIME PHYSICAL INTRUSION INTO A CORE OR METRO OPTICAL NETWORK - A fiber network is monitored in order to detect physical intrusion. The state of polarization of an optical fiber is monitored. A fiber tap is determined to have occurred if the state of polarization of the fiber changes beyond a predetermined amount found to be associated with all types of fiber taps. Alternately, it may be determined that a fiber tap has occurred if the state of polarization changes beyond a second predetermined amount and in a predetermined direction. Monitoring of the state of polarization occurs before and after a time period chosen to be less than a time during which the state of polarization of the optical fiber is expected to drift. This step eliminates false positives due to natural fiber PMD drift. | 07-18-2013 |
20130195395 | Sensing fiber, coil of sensing fiber, and all-fiber current sensor - Embodiments of the present invention provide a sensing fiber, which includes a polarization-maintaining (PM) fiber being spun around a core thereof to have a first, a second, and a third sections, wherein the first section has an increasing rate of spin from a predetermined slow rate to a predetermined fast rate; the second section is spun at the predetermined fast rate; and the third section has a decreasing rate of spin from the predetermined fast rate to the predetermined slow rate. The first and third sections have a substantially same length and changes in rate of spin are substantially symmetric to each other. Embodiments of the present invention also provide a fiber coil made by the sensing fiber, with the first section and the third section being substantially overlapped along the coil, and provide an all-fiber current sensor employing the fiber coil. | 08-01-2013 |
20130230270 | WAVEGUIDE SANDWICH SOURCE OF POLARIZATION ENTANGLED PHOTONS - The disclosure is directed at a waveguide sandwich which comprises a pair of host materials, each of the host materials housing a component waveguide. The component waveguides are then placed in physical contact with each other to form a composite waveguide thereby producing a waveguide sandwich. | 09-05-2013 |
20130236136 | OPTICAL WAVEGUIDE CIRCUIT - An optical waveguide circuit includes a polarization beam splitter connecting to a first input optical waveguide; an optical interference element receiving one of orthogonally polarization-split lights of a first light from the polarization beam splitter, and one of orthogonally-polarized lights from a second light input to a second input optical waveguide, the optical interference element causing interference therebetween; a first connection optical waveguide connecting the polarization beam splitter and the optical interference element; and a second connection optical waveguide connecting the second input optical waveguide and the optical interference element. The first and the second input optical waveguides have a straight-line shape or an S-shape including a first bending portion and a second bending portion to cancel the polarization-rotation of light taking place in the first bending portion. The polarization beam splitter, the first and the second connection optical waveguides, and the optical interference element are arranged in an S-shape. | 09-12-2013 |
20130243366 | OPTICAL ELEMENT AND METHOD OF MANUFACTURE OF OPTICAL ELEMENT - A waveguide mounting portion ( | 09-19-2013 |
20130301976 | WAVEGUIDE-TYPE POLARIZATION BEAM SPLITTER - Provided is a waveguide-type polarization beam splitter in which deterioration of a polarization extinction ratio due to temperature change and wavelength change is suppressed. A groove is formed to extend across a pair of optical waveguide arms and two quarter wave plates are provided in the groove to extend respectively across the arms. Polarization axes of the quarter wave plates are orthogonal to each other. A first optical coupler which gives a phase difference of 0° or 180° between coupled or split light beams and a second optical coupler which gives a phase difference of 90° or −90° between coupled or split light beams are used in combination. | 11-14-2013 |
20130301977 | WAVEGUIDE-TYPE POLARIZATION BEAM SPLITTER - Provided is a waveguide-type polarization beam splitter in which deterioration of a polarization extinction ratio due to temperature change and wavelength change is suppressed. The waveguide-type polarization beam splitter includes: input optical waveguides; a first multimode interference optical coupler; a pair of optical waveguide arms; a second multimode interference optical coupler; and output optical waveguides. A quarter wavelength delay is provided in one of the pair of optical waveguide arms, a groove is formed to extend across both of the pair of optical waveguide arms, and two quarter wave plates are provided in the groove to extend respectively across the arms. Polarization axes of the respective quarter wave plates are orthogonal to each other. | 11-14-2013 |
20130315525 | OPTICAL WAVEGUIDE ATTENUATOR FOR A POLARIZED LIGHT SOURCE - An optical apparatus comprises: a waveguide substrate, optical cladding formed on the substrate; a waveguide core formed within the cladding, an optically absorptive layer formed within the cladding, and a linearly polarized light source. The waveguide core includes an attenuating segment thereof, and the absorptive layer is formed near the attenuating segment of the core. The core and cladding are arranged to form an optical waveguide that supports a propagating optical mode. The absorptive layer is positioned near the attenuating segment of the core so as to spatially overlap a portion of the optical mode. The extent of the overlap results in a designed level of optical loss per unit distance of propagation of a linearly polarized optical signal along the attenuating segment of the optical core in the optical mode without substantial alteration of the polarization state of the optical signal. | 11-28-2013 |
20130322810 | MULTIPLE WAVEGUIDE IMAGING STRUCTURE - In embodiments of a multiple waveguide imaging structure, an imaging structure includes a first waveguide for see-through viewing of an environment at a first field of view, and includes a second waveguide for see-through viewing of the environment at a second field of view. The first and second waveguides each include a polarizing beam splitter to reflect light that enters at a first polarization orientation angle in the respective first and second waveguides, and the polarizing beam splitters pass through the light that enters at a second polarization orientation angle. The imaging structure also includes a polarization switch to rotate the polarization of the light through the first and second polarization orientation angles. | 12-05-2013 |
20130343695 | POLARIZATION SPLITTING OPTICAL COUPLER - A coupler/splitter including two neighboring coplanar waveguide portions extending in a same direction, the first portion having a constant cross-section, the second portion having a variable cross-section so that the effective index of the second waveguide portion varies, in the upstream-to-downstream direction, from a first lower value to a second value higher than the effective index of the first portion, in adiabatic coupling conditions. | 12-26-2013 |
20140003763 | COHERENT DETECTION FOR AN INTEGRATED CIRCUIT HAVING A MULTIPLEXER OR A DEMULTIPLEXER WITH A SHARED PROPAGATION REGION | 01-02-2014 |
20140003764 | POLARIZATION MATERIAL ON AN OPTICAL MULTIPLEXER OR AN OPTICAL DEMULTIPLEXER | 01-02-2014 |
20140016895 | Plasmonic Polarizer - A radiation-emitting device (e.g., a laser) includes an active region configured to generate a radiation emission linearly polarized along a first polarization direction and a device facet covered by an insulating layer and a metal layer on the insulating layer. The metal layer defines an aperture through which the radiation emission from the active region can be transmitted and coupled into surface plasmons on the outer side of the metal layer. The long axis of the aperture is non-orthogonal to the first polarization direction, and a sequential series of features are defined in or on the device facet or in the metal layer and spaced apart from the aperture, wherein the series of features are configured to manipulate the surface plasmons and to scatter surface plasmons into the far field with a second polarization direction distinct from the first polarization direction. | 01-16-2014 |
20140023311 | PRACTICAL SILICON PHOTONIC MULTI-FUNCTION INTEGRATED-OPTIC CHIP FOR FIBER SENSOR APPLICATIONS - This patent disclosure is based on a silicon, instead of LiNbO | 01-23-2014 |
20140050437 | OPTICAL FIBER WINDING STRUCTURES AND TECHNIQUES - A fiber is wound into first and second coils lying substantially in respective first and second planar directions having a substantially orthogonal relationship. The first and second coils are configured to result in respective first and second birefringences that are dominated by bend-induced birefringence. The first and second birefringences have respective axes that are rotated with respect to each other in real space by an angle that is substantially equal to 90 degrees. Light traveling through the fiber has a state of polarization that evolves in substantially opposite directions as it travels respectively through the first and second coils. The first and second coils are configured such that light traveling through the fiber acquires respective, substantially opposite first and second phase shifts. Light traveling through the fiber acquires respective first and second differential group delays that substantially compensate for each other. | 02-20-2014 |
20140056552 | OPTICAL PATH ROUTING ELEMENT - An optical path routing element includes first and second optical waveguide that are parallel to each other. The first and second waveguides have the same thickness and have the same width, the width being larger than the thickness. The width is within a range based upon coupling lengths of the first and second waveguides for a TE polarization and for a TM polarization such that the difference between the coupling length for TE polarization and the coupling length for TM polarization is no more than a predetermined percentage times the sum of the coupling length for TE polarization and the coupling length for TM polarization divided by 2. | 02-27-2014 |
20140064655 | NED POLARIZATION SYSTEM FOR WAVELENGTH PASS-THROUGH - A system and method are disclosed for providing uniform color distribution of light emitted from a light source to an eye box in a near eye display (NED). An example of the system and method uses an optical element including two or more waveguides optimized to different colors of the visible light spectrum. The optical element further includes one or more polarization state generators for controlling the polarization of light incident on the waveguides to facilitate coupling of light into a matched waveguide, and to impede coupling of light into unmatched waveguides. | 03-06-2014 |
20140064656 | POLARIZATION DIVERSE DEMULTIPLEXING - A method for demultiplexing an optical signal includes receiving a multi polarization optical signal, separating the multi polarization optical signal into a first polarization optical signal and a second polarization optical signal, rotating a polarization of the first polarization optical signal to match a polarization of the second polarization optical signal, routing the first polarization optical signal and the second polarization optical signal to a common demultiplexing device, outputting a channel of the first polarization optical signal and the second polarization optical signal to a common photodetector. | 03-06-2014 |
20140064657 | SINGLE-FIBER SUBASSEMBLY - A single-fiber subassembly includes a first photodiode for receiving incident light, a laser diode for transmitting emergent light, and a same-wavelength optical splitter having a positive direction. The splitter includes a first birefringent plate, a half-wave plate, a 45° Faraday rotator, and a second birefringent plate arranged in sequence along and vertical to the positive direction. An included angle between an optical axis of the first plate and the positive direction is α, where 0°<α<90°; an angle between an e-axis of the half-wave plate and a principal section of the first plate is β, where β=22.5° or 67.5°. The incident light passes through the splitter along the positive direction; the emergent light passes through the splitter along a direction opposite to the positive direction; and the emergent light is linearly polarized light whose polarization direction is vertical to the principal section of the first plate. | 03-06-2014 |
20140072257 | WAVELENGTH SELECTIVE OPTICAL SWITCH - A wavelength selective optical switch includes a light input/output unit having a plurality of input/output ports, a polarization plane-independent wavelength dispersion element that splits incident light input from the optical input/output unit into spatially different angles for each wavelength, and synthesizes emergent light from different directions and outputs the light to the optical input/output unit, a condenser element that condenses the light split by the wavelength splitting element, a polarization splitter that splits incident light incident via the condenser element according to a polarization component to result in first and second light beams, aligns a polarization direction by rotating a polarization direction of one of the beams, and synthesizes the incident light by rotating one polarization direction of the emergent light of the same wavelength among the first and second reflected light beams, and a space phase modulation element. | 03-13-2014 |
20140112612 | GENERATION OF AZIMUTHALLY OR RADIALLY POLARIZED RADIATION IN OPTICAL WAVEGUIDES - The invention relates to an apparatus for generating azimuthally or radially polarized radiation by means of an optical waveguide ( | 04-24-2014 |
20140133795 | SCATTERING DEVICE ON AN ARRAYED WAVEGUIDE GRATING - An optical device may include a substrate; an arrayed waveguide grating provided on the substrate and having first and second slabs; multiple first waveguides extending from the first slab, the multiple first waveguides may supply respective first optical signals to the first slab; multiple second waveguides extending from the second slab, the multiple second waveguides may supply respective second optical signals to the second slab; a third waveguide extending from the second slab, the third waveguide outputting a third optical signal from the second slab, the third optical signal including the first optical signals; a fourth waveguide extending from the first slab, the fourth waveguide may output a fourth optical signal from the first slab, the fourth optical signal including the second optical signals; and a first scattering device optically coupled to a portion of an edge of the first slab between the multiple first waveguides and the fourth waveguide. | 05-15-2014 |
20140133796 | Apparatus For Providing Polarization Rotation - Various embodiments provide a waveguide-based polarization rotator that comprises top and bottom claddings of substantially the same material. In some embodiments, the waveguide-based polarization rotator converts between Transverse Electric (TE) and Transverse Magnetic (TM) modes. | 05-15-2014 |
20140153861 | POLARIZATION ROTATOR - A polarization rotator comprises a first waveguide configured to be coupled to an input coupler at a first end and a second waveguide, wherein the first waveguide is offset from the second waveguide and a second end of the first waveguide is coupled to a second end of the second waveguide. | 06-05-2014 |
20140153862 | POLARIZATION ROTATOR ASSEMBLY INCLUDING A SUBWAVELENGTH COMPOSITE PORTION - A polarization rotator assembly for rotating a polarization mode of an electromagnetic signal is provided. The polarization rotator assembly has a waveguiding structure of co-extensive first and second layers defining, successively, an input portion, a subwavelength composite portion and a polarization rotating portion. The subwavelength composite portion is formed by the first and second layers, where the second layer defines a subwavelength pattern. The polarization rotator portion is geometrically configured to rotate the polarization mode of the electromagnetic signal. | 06-05-2014 |
20140169727 | Fiber Optic Connector With Polarity Change - A fiber optic connector includes a boot receiving an optical fiber; a connector body for receiving the optical fiber and terminating the optical fiber; and a latch coupled to the connector body, the latch for engaging an adapter for receiving the fiber optic connector, the latch repositionable relative to the connector body to enable polarity change of the fiber optic connector without changing a relative position of the connector body and the optical fiber. | 06-19-2014 |
20140199016 | Illumination of Optical Analytical Devices - Optical analytical devices and their methods of use are provided. The devices are useful in the analysis of highly multiplexed optical reactions in large numbers at high densities, including biochemical reactions, such as nucleic acid sequencing reactions. The devices include optical waveguides for illumination of the optical reactions. The devices further provide for the efficient coupling of optical excitation energy from the waveguides to the optical reactions. Optical signals emitted from the reactions can thus be measured with high sensitivity and discrimination using features such as spectra, amplitude, and time resolution, or combinations thereof. The devices of the invention are well suited for miniaturization and high throughput. | 07-17-2014 |
20140205230 | OPTICAL-FIBER ARRAY AND METHOD - Method and apparatus for forming an optical-fiber-array assembly, which include providing a plurality of optical fibers including a first optical fiber and a second optical fiber, providing a fiber-array plate that includes a first surface and a second surface, connecting the plurality of optical fibers to the first surface of the fiber-array plate, transmitting a plurality of optical signals through the optical fibers into the fiber-array plate at the first surface of the fiber-array plate, and emitting from the second surface of the fiber-array plate a composite output beam having light from the plurality of optical signals. Optionally, the first surface of the fiber-array plate includes indicia configured to assist in the alignment of the plurality of optical fibers on the first surface of the fiber-array plate. In some embodiments, the second surface of the fiber-array plate includes a plurality of beam-shaping optics configured to shape the composite output beam. | 07-24-2014 |
20140212083 | OPTICAL FIBER FOR COHERENT ANTI-STOKES RAMAN SCATTERING ENDOSCOPES - An optical fiber for use in a Coherent Anti-Stokes Raman Scattering (CARS) endoscope, comprising a core guiding lightwaves at a pump wavelength and at a Stokes wavelength, the core being single-mode at both wavelengths. The core is surrounded by cladding layers, including an inner cladding layer, a trench cladding layer, an intermediate cladding layer and an outer cladding layer. The refractive index of the trench cladding layer is lower than those of both neighboring cladding layers so as to define a trench in the radial refractive-index profile. The bending losses of the fundamental LP | 07-31-2014 |
20140219601 | POLARIZATION SPLITTER OF HIGH POLARIZATION EXTINCTION RATIO - A polarization splitter includes a substrate, an asymmetric Y-shaped waveguide, and a pair of strip-shaped electrodes. The substrate is made of a birefringence crystal and includes a surface. The Y-shaped waveguide is formed into the surface and includes an input section for transmitting both transverse electric wave and transverse magnetic wave, a first branch for only transmitting the transverse electric wave, and a second branch for only transmitting the transverse magnetic wave. The first branch and the second branch branch off the input section. The electrodes are positioned on the surface, arranged at two opposite sides of the input section and substantially parallel with a central axis of the input section. | 08-07-2014 |
20140241661 | SUBWAVELENGTH GRATING COUPLER - A method, system or device for configuring an optical coupling device including obtaining characteristics of an optical signal and ambient conditions for storage in memory, utilizing a processor for identifying an optimum effective subwavelength area refractive index and a grating period for the input signal and ambient characteristics stored in memory, and utilizing the processor for identifying a preferred filling factor for a transverse polarization. | 08-28-2014 |
20140254976 | TWIST SEPTUM POLARIZATION ROTATOR - A waveguide polarization rotator is provided as unitary body with a first bore; a diametral first septum of the unitary body extending between sidewalls of the first bore. The first septum is twisted between a first end of the first septum and a second end of the first septum. The waveguide polarization rotator may be further provided in a matrix configuration with a plurality of second bores each with a diametral second septum of the unitary body extending between sidewalls of the second bores; a longitudinal axis of the first bore and each of the second bores parallel to one another. The waveguide polarization rotator may be manufactured via injection molding, casting or the like. | 09-11-2014 |
20140270620 | MODAL ROTATION IN OPTICAL WAVEGUIDES - An optical waveguide structure includes a rotator having a dual-layer core. A first layer of the dual-layer core may include a tapering portion. A second layer of the dual-layer core may include a rib portion disposed on the tapering portion. The combination of the rib portion and the tapering portion may receive a pair of optical signals, one being polarized in a TE mode and the other being polarized in a TM mode, and convert them to a pair of TE mode optical signals. | 09-18-2014 |
20140270621 | PHOTONIC MULTI-CHIP MODULE - The subject matter disclosed herein relates to a photonic module comprising: a plurality of metal pads to receive CMOS integrated circuit (IC) chips to be mounted on a silicon-on-insulator (SOI) wafer; electrical interface circuits to receive electrical signals from the CMOS IC chips and to modify the electrical signals; optical drivers to receive the modified electrical signals and to convert the modified electrical signals to optical signals; and a photonic layer on the SOI wafer comprising silicon optical waveguides and silica optical waveguides to transmit or receive the optical signals for communication among the CMOS IC chips. | 09-18-2014 |
20140270622 | MATERIAL STRUCTURES FOR FRONT-END OF THE LINE INTEGRATION OF OPTICAL POLARIZATION SPLITTERS AND ROTATORS - A polarization splitter and rotator of a wafer chip, an opto-electronic device and method of use is disclosed. The first waveguide of the wafer chip is configured to receive an optical signal from an optical device and propagate a transverse electric eigenstate of the received optical signal. The second waveguide is configured to receive a transverse magnetic eigenstate of the received optical signal from the first waveguide. The second waveguide includes a splitter end, a middle section and a rotator end, wherein the splitter end includes a layer of polycrystalline silicon, a layer of silicon oxide and a layer of silicon nitride, the rotated end includes a layer single crystal silicon, a layer silicon oxide and a layer of silicon nitride, and the middle section includes layers of single crystal silicon, silicon oxide polycrystalline silicon and silicon nitride. | 09-18-2014 |
20140314367 | Compound Optical Combiner - A compound optical combiner for combining multiple optical signals includes a set of combiners. The set of combiners includes at least one polarization combiner optically connected to at least one non-polarization combiner. The non-polarization combiner combines a first set of input signals while preserving a polarization of each input signal in the first set of signals. The polarization combiner combines a second set of input signals while converting the polarization of at least one input signal in the second set of signals. | 10-23-2014 |
20140314368 | DIRECTLY-MODULATED MULTI-POLARIZATION OPTICAL TRANSMITTERS - The present invention relates to optical transmitters, transceivers, and transponders used for transmission of information or data in any form through a physical medium dependent (PMD) network. The speed of such networks depends, in part, on the density of information that can be transmitted through the physical medium. Optical transmitters or transceivers can be used to transmit multiple independent signals simultaneously through the same medium using different directions or axes of polarization, where the difference in the directions or axes of polarization can be used to distinguish the multiple signals at the receiver. In this invention, we use a master laser (l | 10-23-2014 |
20140321797 | Increased tolerance polarization converters - An optical polarization converter device includes a first polarization converter section [ | 10-30-2014 |
20140341500 | POLARIZING SPLITTER AND METHOD FOR MANUFACTURING SAME - A polarizing splitter includes a base, an asymmetric Y-shaped waveguide, and a pair of strip-shaped electrodes. The Y-shaped waveguide protrudes from the upper surface and includes an input section for the passage of both transverse electric and transverse magnetic waves, a first branch for transmitting the transverse electric wave only, and a second branch for transmitting the transverse magnetic wave only. The first branch and the second branch branch from the input section. The electrodes are positioned on the surface, arranged at opposite sides of the input section, and are substantially parallel with a central axis of the input section. | 11-20-2014 |
20140355927 | T-SHAPE POLARIZATION BEAM SPLITTER BASED ON PHOTONIC CRYSTAL WAVEGUIDE - A photonic crystal waveguide T-polarization beam splitter, comprising a photonic crystal waveguide with a completely forbidden band; after the input end ( | 12-04-2014 |
20140355928 | TE- POLARIZATION SPLITTER BASED ON PHOTONIC CRYSTAL WAVEGUIDE - The present invention discloses a TE-polarization splitter based on a photonic crystal waveguide, comprising a waveguide formed in a photonic crystal with a complete photonic bandgap, wherein after the incident wave with any polarization direction is inputted into the polarization splitter via the input port of the photonic crystal waveguide. TE wave is outputted from the output port of the polarization splitter, while the TM wave is reflected from the input port of the polarization splitter. The structure of the present invention has a small volume, high degree of polarization, high light transmission efficiency, and it is suitable for large-scale optical integrated circuits and can realize the polarization beam splitting function for different wavelengths. | 12-04-2014 |
20140369639 | DISPERSION COMPENSATION FIBER - A dispersion compensation fiber comprises a fiber core and cladding. The fiber core is a core layer mainly doped with germanium and having a positive relative refractive index difference. The cladding covering the fiber core comprises a trench cladding mainly doped with fluorine, an annular cladding mainly doped with germanium, a matching cladding mainly doped with fluorine, and an outermost mechanical cladding in order. Relative refractive index differences of the fiber core and the claddings are respectively: Δ1% being 1.55% to 2.20%, Δ2% being −0.55% to −0.30%, Δ3% being 0.40% to 0.65%, Δ4% being −0.20% to −0.01%, and Δ5% being 0. Radius ranges, from R1 to R5, of the fiber core and the claddings are respectively: R1 being 1.4 to 1.7 μm, R2 being 4.1 to 4.8 μm, R3 being 6.7 to 8.8 μm, R4 being 10 to 17 μm, and R5 being 38 to 63 μm. | 12-18-2014 |
20140369640 | Coating of Optical Waveguides - The invention relates to a method for producing an optical waveguide ( | 12-18-2014 |
20150016768 | POLARIZATION BEAM COMBINER/SPLITTER, POLARIZATION BEAM COMBINING/SPLITTING STRUCTURE, LIGHT MIXER, OPTICAL MODULATOR MODULE, AND METHOD FOR MANUFACTURING POLARIZATION BEAM COMBINER/SPLITTER - The present invention provides a polarization beam combiner/splitter, a polarization beam combining/splitting structure, a light mixer, an optical modulator module, and a method for manufacturing a polarization beam combiner/splitter with suitable polarization beam combining/splitting characteristics. In the polarization beam combiner/splitter, a polarization beam combining/splitting film is placed on a substrate and allows TE light to pass through and causes TM light to branch off. A first optical waveguide is formed on the substrate with an end surface facing a first surface of the polarization beam combining/splitting film and with a waveguide direction coinciding with a propagation direction of the TE light. A second optical waveguide is formed on the substrate with an end surface facing a second surface of the polarization beam combining/splitting film and with a waveguide direction coinciding with a propagation direction of the TM light. | 01-15-2015 |
20150023629 | COLLIMATOR HOLDER FOR ELECTRO-OPTICAL SENSOR - A collimator holder in the form of a glass or ceramic block that has precisely machined holes formed in the block to receive respective collimator assemblies. Each collimator assembly includes an optical fiber attached to a GRIN lens by a ferrule. Optionally, each collimator assembly can include a glass tube that surrounds at least the lens and optionally part or all of the ferrule. The lens or the tube is inserted into the hole and bonded therein by an epoxy. The block, together with the collimator assemblies installed, is bonded to the bottom surface of a crystal assembly thereby forming an electro-optic sensor. The crystal assembly can include one or more polarizing beam splitters, an electro-optic crystal, and a prism, configured to sense a current through a current-carrying cable or a voltage between the cable and another potential. | 01-22-2015 |
20150023630 | MODAL ROTATION IN OPTICAL WAVEGUIDES - An optical waveguide structure includes a rotator having a dual-layer core. A first layer of the dual-layer core may include a tapering portion. A second layer of the dual-layer core may include a rib portion disposed on the tapering portion. The combination of the rib portion and the tapering portion may receive a pair of optical signals, one being polarized in a TE mode and the other being polarized in a TM mode, and convert them to a pair of TE mode optical signals. | 01-22-2015 |
20150036967 | Periodic Probabilistic Two-Dimensional cluster State Generator with Arbitrary Interconnections - A Periodic Cluster State Generator (PCSG) consisting of a monolithic integrated waveguide device that employs four wave mixing, an array of probabilistic Photon Guns, single mode Sequential Entanglers and an array of controllable entangling gates between modes to create arbitrary size and shape cluster states with several constraints. The cluster state is assumed linear or square lattice. Only nearest neighbor qubits are entangled. Such a cluster state resource has been proven to be able to perform universal quantum computing if the initial state is large enough. | 02-05-2015 |
20150049980 | TM-POLARIZATION SPLITTER BASED ON PHOTONIC CRYSTAL WAVEGUIDE - A photonic crystal waveguide TM-polarization splitter, comprising a photonic crystal waveguide with a completely forbidden band; after the input end ( | 02-19-2015 |
20150086153 | OPTICAL DEVICE HAVING A STEPWISE OR TAPERED LIGHT INPUT/OUTPUT PART AND MANUFACTURING METHOD THEREFOR - In a method of manufacturing an optical device including an optical waveguide having a core, a cladding and a light input/output part through which a light beam is input or output, a substrate is prepared which is provided with a uniform thickness of single-crystalline film having its constituent atoms forming a diamond lattice structure and its surface being neither the (111) plane nor its equivalent planes. In the single-crystalline film, a precursor structure is formed which has a precursor of light input/output part. A mask is formed such as to expose the precursor with the remaining part covered. The structure is immersed into an alkaline solution for wet etching with the (111) planes used as etch-stop planes. | 03-26-2015 |
20150117809 | SILICON WAVEGUIDE HAVING POLARIZATION INSENSITIVE AND TEMPERATURE INSENSITIVE PHASE DELAY - An apparatus includes a first waveguide configured to receive an input signal. A section of the first waveguide has a length between a first initial point and a first end point. A first polarization rotator is located within the section at a first distance from the first initial point of the section of the first waveguide. A section of a second waveguide is configured to receive the input signal, and has the same length between the second initial point and a second end point. A second polarization rotator is located within the section of the second waveguide at a second distance from the second initial point of the section of the second waveguide. More particularly, a relative distance between the first distance and the second distance is configured to achieve a desired phase delay of an output signal from the first waveguide and an output signal from the second waveguide. | 04-30-2015 |
20150301280 | INTEGRATED POLARIZATION FILTER AND TAP COUPLER - Disclosed herein are methods, structures, apparatus and devices to integrate polarization filters and power tap couplers on planar photonic circuits that advantageously provide a lower insertion loss to an optical signal and improved optical bandwidth as compared with contemporary designs wherein these two functions are implemented separately. | 10-22-2015 |
20150309252 | SILICON PHOTONICS DEVICE AND COMMUNICATION SYSTEM THEREFOR - A silicon photonics device and system therefor. The silicon photonics device can include a 300 nm SOI (silicon-on-insulator with 300 nm top Si) overlying a substrate member. A waveguide structure can be configured from a portion of the SOI layer and disposed overlying the substrate member. This waveguide structure can include an AWG (Arrayed Waveguide Gratings) structure with 300 nm×300 nm symmetric grating waveguides or an Echelle grating structure characterized by a top silicon thickness of 300 nm. The waveguide structure can also include an index compensator material configured to provide at least two material index ratings in the waveguide structure. | 10-29-2015 |
20150338577 | Polarization Rotator-Splitter/Combiner Based On Silicon Rib-Type Waveguides - Various embodiments of an integrated polarization rotator-splitter/combiner apparatus are described. An integrated polarization rotator-splitter apparatus may include an input waveguide section, a polarization rotator section, a polarization splitter section and an outgoing waveguide section, which can also be reversely connected as a polarization rotator-combiner. | 11-26-2015 |
20150362687 | Optical Element - An aspect of the present invention is an optical element that combines light waves using a spatial optical system, including a housing section, an optical waveguide element, a combine section, and a collimator section is provided. The housing section has a storage space and is formed by joining two or more members together. The optical waveguide element is provided in the storage space and emits at least two light waves. The combine section is provided outside the storage space and combines the light waves emitted from the optical waveguide element outside the housing section using a spatial optical system. The collimator section is connected to the housing section, holds the combine section, and includes a light focusing section configured to focus a light wave combined by the combine section and an optical fiber to which the light wave focused by the light focusing section is introduced. | 12-17-2015 |
20160004013 | OPTICAL FIBER FLEXIBLE MULTI-WAVELENGTH FILTER AND METHOD OF CONTROLLING WAVELENGTH OF SPECTRUM USING THE SAME - An optical fiber flexible multi-wavelength filter based on a polarization-diversity loop includes a pair of high-birefringence optical fibers, a polarization beam splitter connected to the pair of high-birefringence optical fibers and dividing light incident from a broadband light source into two polarized beams, and a polarization controller connected to the high-birefringence optical fibers or the polarization beam splitter and controlling the two polarized beams divided by the polarization beam splitter. The polarization controller includes a ½ wave plate or a ¼ wave plate, and the polarization controller disposed between the high-birefringence optical fibers controls an angle difference between principal axes of the high-birefringence optical fibers and visibility. Interference in the high-birefringence optical fibers is controlled via changing polarized light incident from the broadband light source using the polarization controller. | 01-07-2016 |
20160004105 | Optical Waveguide Element and Method for Manufacturing Optical Waveguide Element - A method according to an aspect of the present invention, is a method for manufacturing an optical waveguide element, including: an optical waveguide forming step of forming an optical waveguide extending in a first direction in a substrate by doping the substrate with an impurity for reducing a coercive electric field of the substrate, a ridge forming step of forming a first ridge part including the optical waveguide and a second ridge part intersecting the first ridge part, and a poling step of reversing a polarization direction of a region of the substrate divided by the second ridge part by applying voltage to the region. | 01-07-2016 |
20160018594 | OPTICAL CIRCULATOR ARRAY - Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optical communications. In one aspect, an optical circulator array includes a plurality of stacked three port circulators each having a respective first port of a first port array, a respective second port of a second port array, and a respective third port of a third port array, wherein each of the plurality of staked three port circulators share optical components including: a first Wollaston prism coupled to the first port array, a first lens, a first half wave plate, a polarization dependent beam path separator, a second half wave plate, a second lens, a propagation direction dependent polarization rotation assembly, a second Wollaston prism coupled to the second port array, and a third Wollaston prism coupled to the third port array. | 01-21-2016 |
20160020278 | APPLICATIONS FOR NANOPILLAR STRUCTURES - A disclosed method of fabricating a hybrid nanopillar device includes forming a mask on a substrate and a layer of nanoclusters on the hard mask. The hard mask is then etched to transfer a pattern formed by the first layer of nanoclusters into a first region of the hard mask. A second nanocluster layer is formed on the substrate. A second region of the hard mask overlying a second region of the substrate is etched to create a second pattern in the hard mask. The substrate is then etched through the hard mask to form a first set of nanopillars in the first region of the substrate and a second set of nanopillars in the second region of the substrate. By varying the nanocluster deposition steps between the first and second layers of nanoclusters, the first and second sets of nanopillars will exhibit different characteristics. | 01-21-2016 |
20160041337 | INTEGRATED PHOTONIC COMPONENT AND METHOD OF DESIGNING THE SAME - An integrated photonic component ( | 02-11-2016 |
20160047956 | Diffractive Waveplate Lenses and Applications - Methods, systems and devices for diffractive waveplate lens and mirror systems allowing electronically focusing light at different focal planes. The system can be incorporated into a variety of optical schemes for providing electrical control of transmission. In another embodiment, the system comprises diffractive waveplate of different functionality to provide a system for controlling not only focusing but other propagation properties of light including direction, phase profile, and intensity distribution. | 02-18-2016 |
20160070063 | OPTICAL COUPLING DEVICE, PHOTOELECTRIC CONVERSION DEVICE AND OPTICAL COMMUNICATION DEVICE - An optical communication device includes two photoelectric conversion devices, and an optical fiber connection between the photoelectric conversion devices. The photoelectric conversion devices include an optical coupling device, a light emitting device, and an optical receiver. The optical coupling device includes a substrate, a top surface, a bottom surface opposite to the top surface, a first waveguide a second waveguide and a grating, the first connecting portion and the second connecting portion are connected with each other at an overlap area and form a Y-shape, the grating is used to reflect transverse electric waves and passes transverse magnetic waves. | 03-10-2016 |
20160070124 | OPTICAL FIBER ROTARY SQUEEZER POLARIZATION CONTROLLER - An optical fiber rotary squeezer polarization controller, comprising a base, a left bracket and a right bracket respectively mounted at both ends of the base, characterized in that a shaft is rotatably mounted between the left bracket and the right bracket, the shaft having a through channel cut therein lengthwise for placement of an optical fiber, the shaft further being mounted with a squeezing apparatus corresponding to the channel. The present invention has altered the means by which an optical fiber is fixed onto the prior-art polarization controllers and has eliminated the clamps at both ends of the optical fiber. The shaft carries the squeezing apparatus to rotate to any desired angles while the optical fiber remains stationary under the effect of its own tension. As the optical fiber extends outwardly from either end of the shaft, it is restrained by its own tension and, therefore, will not rotate along with the shaft. As a result, the twisting damage to the optical fiber caused by its being fixed at both ends and twisting of the optical fiber when it is spun after squeezed which would otherwise occur in the prior art can be thoroughly eliminated. In the absence of twisting damage, it is not necessary to make a large squeezer polarization controller and, therefore, the volume of the squeezer polarization controller can be reduced. | 03-10-2016 |
20160091662 | OPTICAL WAVEGUIDE LENS - An optical waveguide lens includes a base, a Y type waveguide, a polarized grating. The Y type waveguide has a first gate, a second gate and a third gate. The first gate is located on one edge of the base, the second gate and the third gate are located on an opposite edge of the base. The polarized grating is formed on the Y type waveguide and adjacent to the first gate of the Y type waveguide. | 03-31-2016 |
20160103281 | POLARIZATION BEAM SPLITTER AND OPTICAL DEVICE - A polarization beam splitter according to an exemplary embodiment of the present invention includes: a demultiplexer ( | 04-14-2016 |
20160116679 | VARYING BEAM PARAMETER PRODUCT OF A LASER BEAM - An optical delivery waveguide for a material laser processing system includes a small lens at an output end of the delivery waveguide, transforming laser beam divergence inside the waveguide into a spot size after the lens. By varying the input convergence angle and/or launch angle of the laser beam launched into the waveguide, the output spot size can be continuously varied, thus enabling a continuous and real-time laser spot size adjustment on the workpiece, without having to replace the delivery waveguide or a process head. A divergence of the laser beam can also be adjusted dynamically and in concert with the spot size. | 04-28-2016 |
20160131835 | Waveguide Polarization Rotator and Method of Construction Thereof - An embodiment waveguide polarization rotator includes an optical waveguide and an overlay strip. The optical waveguide has an input end and an output end oppositely disposed thereon. The optical waveguide is operable to receive, at the input end, an input optical signal having a mode having an input polarization. The optical waveguide is further operable to generate, at the output end, an output optical signal having an output polarization orthogonal to the input polarization. The overlay strip is disposed over and non-orthogonally crosses the optical waveguide. The overlay strip has a first end laterally offset from the optical waveguide by a first offset distance and a second end laterally offset from the optical waveguide by a second offset distance. | 05-12-2016 |
20160131836 | WAVEGUIDE MODE CONVERTER, POLARIZATION BEAM SPLITTER, AND OPTICAL DEVICE - Provided is a waveguide mode converter ( | 05-12-2016 |
20160131842 | TWO-STAGE ADIABATICALLY COUPLED PHOTONIC SYSTEMS - In an example, a photonic system includes a Si PIC with a Si substrate, a SiO | 05-12-2016 |
20160147011 | POLARISATION MAINTAINING OPTICAL FIBER PACKAGE - A polarisation maintaining optical fiber package is described. The fiber comprises a core having a core diameter, a first protective coating layer surrounding the core, the first protective coating layer having a first protective coating inner diameter, a first protective coating outer diameter and a first protective coating thickness between the first protective coating inner diameter and the first protective coating outer diameter, a second protective coating layer surrounding the first protective coating layer, the second protective coating layer having a second protective coating inner diameter and a second protective coating outer diameter, the first protective coating layer comprising a material having a first hardness and the second protective coating layer comprising a material having a second hardness, wherein the thickness of the first protective coating layer is in the range from 6% to 33% of the core diameter. The thickness of the coatings in the package is such that the optical fiber core exhibits a reduction in strain and stress sensitivity over a wide range of temperatures, even down to around minus 20 degrees C. | 05-26-2016 |
20160154176 | WAVE PLATE AND DIVIDED PRISM MEMBER | 06-02-2016 |
20160161772 | OPTICAL ISOLATOR - The present disclosure provides an optical isolator which includes a planar lightwave circuit, a magneto-optic thin film and a metal thin film with a magnetic field. A channel for transmitting an optical signal is configured in the planar lightwave circuit. The magneto-optic thin film is disposed on the planar lightwave circuit, and a plane on which the magneto-optic thin film is located is parallel to the channel. The metal thin film is disposed on the magneto-optic thin film. | 06-09-2016 |
20160178841 | HIGH-ORDER POLARIZATION CONVERSION DEVICE, OPTICAL WAVEGUIDE DEVICE, AND DP-QPSK MODULATOR | 06-23-2016 |
20160178842 | POLARIZATION CONVERSION ELEMENT | 06-23-2016 |
20160178985 | ALL-FIBER LASER FREQUENCY MIXER AND FREQUENCY-MIXING FIBER LASER THEREOF | 06-23-2016 |
20160187676 | POLYMER OPTICAL ISOLATOR - Various optical isolators are disclosed. One embodiment provides an optical isolator comprising a waveguide that includes polymer magneto-optical media. In a particular embodiment, the waveguide is dimensioned for single mode operation in the selected isolation range. A cross-section of the waveguide is inhomogeneous in terms of magneto-optical materials. Polymer magneto-optical material is a part of the optical waveguide structure. The inhomogeneity induces the propagation constant shift, which is propagation-direction-dependent. An embodiment is characterized by a cutoff frequency for forward propagating waves that is different than the cutoff frequency for reverse waves; the dimensions and direction of magnetization of the waveguide can be tailored so that, in a particular embodiment, the cutoff frequency for forward propagating waves is lower than the cutoff frequency for reverse waves. | 06-30-2016 |
20160195675 | WAVEGUIDE SANDWICH SOURCE OF POLARIZATION ENTANGLED PHOTONS | 07-07-2016 |
20160195676 | INTEGRATED PHOTONIC DEVICES BASED ON WAVEGUIDES PATTERNED WITH OPTICAL ANTENNA ARRAYS | 07-07-2016 |
20160202423 | OPTICAL COUPLING DEVICE, PHOTONIC INTEGRATED CIRCUIT, AND METHOD OF FORMING AN OPTICAL COUPLING DEVICE | 07-14-2016 |
20160202428 | POLARIZATION MAINTAINING CONNECTORS | 07-14-2016 |
20160252673 | Polarization Maintaining Single-Mode Low-Loss Hollow-Core Fiber | 09-01-2016 |
20160377807 | BENT TAPER AND POLARIZATION ROTATOR - A bent taper is provided that includes one or more waveguide bends, at least one of which has a tapering waveguide width along at least a portion thereof. In one embodiment, the bent taper is an S-shaped bent taper that is configured as a TE0-TE1 mode convertor. Such a bent taper can be combined with a linear bi-layer taper configured as a TM0-TE1 mode converter to form a TM0-TE0 polarization rotator. | 12-29-2016 |
20170235049 | OPTICAL FIBER ASSEMBLY WITH ENHANCED FILTERING OF HIGHER-ORDER MODES | 08-17-2017 |
20180024347 | ENDOSCOPIC OPTICAL SYSTEM | 01-25-2018 |