Entries |
Document | Title | Date |
20080218848 | OPTICAL AMPLIFIER, OPTICAL AMPLIFIER CONTROLLER AND CONTROL METHOD OF THE SAME - An optical amplifier includes a detecting section configured to detect a part of an input optical signal from a first node on an input side optical fiber; and a rare earth element doped optical fiber amplifier configured to amplify a remaining part of the input optical signal supplied from the input side optical fiber by using an excitation optical signal supplied from a second node and to output the amplified optical signal as an output optical signal to an output side optical fiber. A control unit controls the excitation optical signal based on the detected part of the input optical signal by the detecting section without real time control based on the output optical signal. | 09-11-2008 |
20080285117 | MICROCHIP-Yb FIBER HYBRID OPTICAL AMPLIFIER FOR MICRO-MACHINING AND MARKING - The invention describes techniques for the control of the spatial as well as spectral beam quality of multi-mode fiber amplification of high peak power pulses as well as using such a configuration to replace the present diode-pumped, Neodynium based sources. Perfect spatial beam-quality can be ensured by exciting the fundamental mode in the multi-mode fibers with appropriate mode-matching optics and techniques. The loss of spatial beam-quality in the multi-mode fibers along the fiber length can be minimized by using multi-mode fibers with large cladding diameters. Near diffraction-limited coherent multi-mode amplifiers can be conveniently cladding pumped, allowing for the generation of high average power. Moreover, the polarization state in the multi-mode fiber amplifiers can be preserved by implementing multi-mode fibers with stress producing regions or elliptical fiber cores These lasers find application as a general replacement of Nd: based lasers, especially Nd:YAG lasers. Particularly utility is disclosed for applications in the marking, micro-machining and drilling areas. | 11-20-2008 |
20090128892 | Chirped pulse fiber amplifier - A short-pulse fiber amplifier system ( | 05-21-2009 |
20090147351 | Cassette for optical fiber amplifier, optical fiber amplifier and light source device | 06-11-2009 |
20090201573 | METHODS AND SYSTEMS FOR COMPENSATION OF SELF-PHASE MODULATION IN FIBER-BASED AMPLIFICATION SYSTEMS - Methods and systems for compensation of Self-Phase Modulation | 08-13-2009 |
20090207483 | PHOTONIC BANDGAP FIBER AND FIBER AMPLIFIER - A photonic bandgap fiber includes a core of a solid material; a first cladding provided around the core; a low-refractive-index region provided in a part of a core vicinity portion of the first cladding and whose average refractive index is lower than that of the core; and a periodic structure region that is arranged in another part of the core vicinity portion of the first cladding which is made of a great many high-refractive-index portions whose refractive index is higher than that of the first cladding arranged in a periodic structure. According to the invention, it is possible to provide a photonic bandgap fiber which, when arranged in a double-clad structure, enables pump light to efficiently pump signal light. | 08-20-2009 |
20090219610 | Optical Pule Amplifier with High Peak and High Average Power - The invention relates to an optical pulse amplifier comprising
| 09-03-2009 |
20090231682 | HIGH-POWER FIBER AMPLIFIER - Fiber light amplifiers adapted for high power application are provided. In embodiments of the invention, the light signal to be amplified is coupled to a cladding mode of an active waveguide region which is cladding doped. The amplified light is coupled to an output fiber have waveguiding properties matching those of the active cladding of the active waveguide region. In other embodiments, two or more amplifying stages are provided coupled by a wavelength selective loss element which couples the Stokes wave co-propagating with the signal to be amplified out of the signal guiding mode prior to the onset of SRS. | 09-17-2009 |
20090231683 | PROCESSING METHOD FOR SUPPRESSING PHOTODARKENING IN Yb-DOPED OPTICAL FIBERS, PHOTODARKENING-SUPPRESSED Yb-DOPED OPTICAL FIBER, AND FIBER LASER - A processing method for suppressing photodarkening in an Yb-doped optical fiber, comprising: a first step of preparing the Yb-doped optical fiber by doping a core with Yb, and irradiating at least one of a gamma ray, a X-ray, or an electron beam onto the Yb-doped optical fiber with an energy greater than a light to be transmitted through the optical fiber when a laser is being oscillated; a second step of measuring a loss spectrum of an infrared region of the optical fiber after the first step, and selecting an optical fiber with the loss in a specific wavelength falling within a predetermined range; and a third step of treating the optical fiber selected in the second step in an atmosphere containing hydrogen to obtain an Yb-doped optical fiber with suppressed photodarkening. | 09-17-2009 |
20090262415 | System and method for uniform illumination of a target area - A system and method is provided for uniform illumination of a target area. In one embodiment, the system comprises a plurality of mutually incoherent light sources configured to generate respective light beams with different wavelengths, and transmitting optics configured to transmit the light beams with different wavelengths in a non-overlapping wavelength light beam pattern over the target area, such that there are no overlap regions of the target area illuminated by a light beam from the same light source. | 10-22-2009 |
20090262416 | CASCADE LASER - Disclosed is an optical fiber that includes an inner core having a concentration of at least one laser active material, the inner core being adapted to operate in a single mode manner; and an outer core disposed about the inner core having a concentration of at least one laser active material. The outer core being adapted to operate in a multimode manner, a cladding disposed about the outer core; and an outer cladding is disposed about the cladding adapted to substantially confine pump light within the cladding. | 10-22-2009 |
20090273828 | High average power ultra-short pulsed laser based on an optical amplification system - The present invention includes an apparatus and the method to scale the average power from high power ultra-short pulsed lasers, while at the same time addressing the issue of effective beam delivery and ablation, by use of an optical amplification system. | 11-05-2009 |
20100067100 | LASER OSCILLATOR - A laser oscillator includes a ring resonator. The ring resonator includes an optical circulator having first, second, third, and fourth ports and a first optical amplification fiber connected to the optical circulator. Light incident on the first port is exited from the second port, and light incident on the second port is exited from the third port. The fourth port provides an exciting light and injects the exciting light into the ring resonator through the first port. The first optical amplification fiber amplifies light exited from the third port with the exciting light provided by the fourth port. The laser oscillator also includes an optical member connected to the optical circulator. The optical member reflects at least a part of the light exited from the second port and injects the same into the second port again. | 03-18-2010 |
20100079854 | RARE-EARTH DOPED CORE MULTI-CLAD FIBER, FIBER AMPLIFIER, AND FIBER LASER - A rare-earth doped core multi-clad fiber includes a core that includes a rare-earth element and a plurality of cladding layers that surround the core. An outermost cladding of the plurality of cladding layers is made of a polymer cladding, the plurality of cladding layers have a polygonal inner cladding, and a shape of a boundary between a second cladding from the outside and the outermost cladding does not have two-fold rotational symmetry. As a result, it is possible to provide a rare-earth doped core multi-clad fiber for an optical amplifier and a fiber laser that has low skew and is inexpensive. | 04-01-2010 |
20100142033 | Ionizing Radiation-Resistant Optical Fiber Amplifier - Disclosed is an optical fiber that includes a central core that is suitable for transmitting and amplifying an optical signal and an inner optical cladding that is suitable for confining the optical signal transmitted within the central core. The central core is formed from a core matrix that contains silica-based nanoparticles doped with at least one rare earth element. | 06-10-2010 |
20100238539 | OPTICAL SIGNAL AMPLIFYING APPARATUS - An optical signal amplifying apparatus feeding back surrounding light to perform negative feedback optical amplification of a semiconductor optical amplifier is provided that enables a coupling structure to be simplified and miniaturized between the semiconductor optical amplifier and an optical fiber transmitting the output light from the semiconductor optical amplifier by using a fiber grating device. Since a first optical fiber grating device FGD | 09-23-2010 |
20100271689 | Spatial filtering of higher order modes in multimode fibers - A mode filter for eliminating the propagation of higher-order modes along a section of optical multimode fiber comprises a graded index (GRIN) lens, preferably of a quarter-pitch length, and a pinhole element in the form of a small core fiber. This configuration creates a Fourier spatial filter assembly that removes higher order modes propagating along an optical fiber while capturing the fundamental mode of the optical signal. A section of GRIN fiber is preferably used as the lens, with the small core fiber disposed at the output of the GRIN fiber lens to collect substantially only the on-axis fundamental mode of the optical signal. Since the higher order modes are shifted away from the origin by the GRIN fiber lens, only the fundamental mode signal is captured by the small core fiber. | 10-28-2010 |
20100302627 | ALL-FIBER CHIRPED PULSE AMPLIFICATION SYSTEMS - By compensating polarization mode-dispersion as well chromatic dispersion in photonic crystal fiber pulse compressors, high pulse energies can be obtained from all-fiber chirped pulse amplification systems. By inducing third-order dispersion in fiber amplifiers via self-phase modulation, the third-order chromatic dispersion from bulk grating pulse compressors can be compensated and the pulse quality of hybrid fiber/bulk chirped pulse amplification systems can be improved. Finally, by amplifying positively chirped pulses in negative dispersion fiber amplifiers, low noise wavelength tunable seed source via anti-Stokes frequency shifting can be obtained. | 12-02-2010 |
20110013268 | SYSTEMS AND METHODS OF ACHIEVING HIGH BRIGHTNESS INFRARED FIBER PARAMETRIC AMPLIFIERS ADN LIGHT SOURCES - Fiber optic amplification in a spectrum of infrared electromagnetic radiation is achieved by creating a chalcogenide photonic crystal fiber (PCF) structure having a radially varying pitch. A chalcogenide PCF system can be tuned during fabrication of the chalcogenide PCF structure, by controlling, the size of the core, the size of the cladding, and the hole size to pitch ratio of the chalcogenide PCF structure and tuned during exercising of the chalcogenide PCF system with pump laser and signal waves, by changing the wavelength of either the pump laser wave or the signal wave, maximization of nonlinear conversion of the chalcogenide PCF, efficient parametric conversion with low peak power pulses of continuous wave laser sources, and minimization of power penalties and minimization of the need for amplification and regeneration of pulse transmissions over the length of the fiber, based on a dispersion factor. | 01-20-2011 |
20110013269 | PLANAR OPTICAL WAVEGUIDE ELEMENT, CHROMATIC DISPERSION COMPENSATOR, OPTICAL FILTER, OPTICAL RESONATOR AND METHODS FOR DESIGNING THE ELEMENT, CHROMATIC DISPERSION COMPENSATOR, OPTICAL FILTER AND OPTICAL RESONATOR - There is provided a planar optical waveguide element in which an optical waveguide core comprises an inner side core having protruding portions that form a rib structure, and an outer side core that is provided on top of the inner side core and that covers circumferential surfaces of the protruding portions, wherein a refractive index of the outer side core is lower than an average refractive index of the inner side core. The structure of the planar optical waveguide element can be applied even when the core is formed from a material having a higher refractive index than that of a silica glass-based material such as silicon (Si) or silicon nitride (Si | 01-20-2011 |
20110026106 | YTTERBIUM-DOPED OPTICAL FIBER, FIBER LASER, AND FIBER AMPLIFIER - An ytterbium-doped optical fiber of the present invention includes: a core which contains ytterbium, aluminum, and phosphorus and does not contain germanium; and a cladding which surrounds this core. The ytterbium concentration in the core in terms of ytterbium oxide is 0.09 to 0.68 mole percent. The molar ratio between the phosphorus concentration in the core in terms of diphosphorus pentoxide and the above ytterbium concentration in terms of ytterbium oxide is 3 to 30. The molar ratio between the aluminum concentration in the core in terms of aluminum oxide and the above ytterbium concentration in terms of ytterbium oxide is 3 to 32. The molar ratio between the above aluminum concentration in terms of aluminum oxide and the above phosphorus concentration in terms of diphosphorus pentoxide is 1 to 2.5. | 02-03-2011 |
20110032602 | ALL-FIBER INTEGRATED HIGH POWER COHERENT BEAM COMBINATION - A fiber laser amplifier system including a master oscillator that generates a signal beam. A splitter splits the signal beam into a plurality of fiber beams where a separate fiber beam is sent to a fiber amplifier for amplifying the fiber beam. A tapered fiber bundle couples all of the output ends of all of the fiber amplifiers into a combined fiber providing a combined output beam. An end cap is optically coupled to an output end of the tapered fiber bundle to expand the output beam. | 02-10-2011 |
20110032603 | INTEGRATED SPECTRAL AND ALL-FIBER COHERENT BEAM COMBINATION - A fiber laser amplifier system including a plurality of master oscillators each generating a signal beam at a different wavelength. A splitter is provided for each master oscillator that splits the signal beam into a plurality of fiber beams where a separate fiber beam is sent to a fiber amplifier. A tapered fiber bundle couples the output ends the fiber amplifiers for each wavelength group into a combined fiber providing a combined output beam, where a separate combined output beam is provided for the wavelength for each master oscillator. An end cap is optically coupled to an output end of each of the tapered fiber bundles to expand the combined output beam. A spectral beam combination grating receives the combined beams from the tapered fiber bundles at different angles and outputs an output beam of all of the combined beams as a single beam being directed in the same direction. | 02-10-2011 |
20110038036 | TUNABLE LASER SOURCE USING INTRACAVITY LASER LIGHT OUTCOUPLING AND MODULE CONTAINING THE SAME - A laser source includes a laser beam generating section for generating a laser beam in a cavity between first reflector and a second reflector; and a tap section provided in the cavity to take out a part of the laser beam. The laser source is a waveguide-based laser source. | 02-17-2011 |
20110149381 | Gain-clamped semiconductor optical amplifier - A gain-clamped semiconductor optical amplifier according to the present invention has a pair of DBR areas | 06-23-2011 |
20110149382 | Apparatuses and Methods for Performing Gain Guiding - A fiber, such as a photonic bandgap fiber, is provided, the fiber including a core and a cladding. The core can extend longitudinally and can have a gain medium configured to provide laser amplification to laser radiation propagating along the core. For example, the gain medium may include a dopant configured to provide amplification, when activated by one or more modes of excitation radiation, of laser radiation propagating along said core. The cladding can be radially exterior to the core, and can be configured to provide a low-loss propagation the one or more modes of excitation radiation and a lossy propagation of all modes of laser radiation along the core, the lossy propagation higher than the low-loss propagation, in particular when the one or more modes of excitation radiation is substantially absent from the core. Associated methods and apparatuses are also provided. | 06-23-2011 |
20110249319 | HIGH-POWER LASER SYSTEM HAVING DELIVERY FIBER WITH NON-CIRCULAR CROSS SECTION FOR ISOLATION AGAINST BACK REFLECTIONS - An apparatus and method that provide optical isolation by permitting substantially all forward-propagating light into a delivery fiber from an optical amplifier and substantially preventing backward-traveling light from the delivery fiber entering the optical amplifier without the use of a conventional optical isolator. Eliminating the isolator improves efficiency and reduces cost. Some embodiments use a delivery fiber having a non-circular core in order to spread a single-mode signal into multiple modes such that any backward-propagating reflection is inhibited from reentering the single-mode amplifier. Some embodiments amplify an optical signal in a gain fiber having an output end, output the forward-propagating amplified signal as a high-brightness optical beam (having a first Rayleigh range) into a removable delivery fiber having a non-circular waveguide, output the amplified signal from a distal end of the delivery fiber, and, without the use of a non-linear optical isolator, inhibit backward-propagating light from re-entering the gain fiber. | 10-13-2011 |
20110261439 | Device and Method for Selective Transmission of an Optical Signal - The present invention relates to a device and a method for selective transmission of an optical signal. | 10-27-2011 |
20110292498 | HIGH PEAK POWER OPTICAL AMPLIFIER - A method and apparatus for providing a high peak power optical beam. The method includes interleaving pulse trains of different wavelengths and spatially and temporally overlapping the different wavelengths to produce an amplified output beam with very high peak power. | 12-01-2011 |
20110310467 | System having light sensor with enhanced sensitivity - The system includes a light-transmitting medium positioned on a base. The light-transmitting medium included a ridge and a slab region. The ridge extends upward from the slab region and defines a portion of a waveguide on the base. The waveguide is configured to guide a light signal through the device. The device also includes an avalanche effect light sensor positioned on the base and configured to detect the presence of the light signal. The light sensor includes a light-absorbing medium positioned on the ridge of the light-transmitting medium such that the light signal is coupled from the light-transmitting medium into the light-absorbing medium. The light-transmitting includes a charge layer located at an interface of the light-transmitting medium and the light-absorbing medium. A multiplication region is formed in the slab regions of the light-transmitting medium such that the multiplication region receives charge carriers from the charge layer during the operation of the light sensor. | 12-22-2011 |
20120069428 | SINGLE-MODE PROPAGATION IN MICROSTRUCTURED OPTICAL FIBERS - The invention relates to an optical fiber as an optical waveguide for the single-mode operation. The present invention proposes a fiber having a microstructure, by which the propagation of modes of a higher order are selectively suppressed in the optical waveguide. At the same time, the propagation of transversal modes of a higher order is dampened more strongly than the propagation of the fundamental modes of the optical waveguide. | 03-22-2012 |
20120081780 | LOOK-UP TABLE AND DIGITAL TRANSMITTER BASED ARCHITECTURE FOR FIBER NONLINEARITY COMPENSATION - Systems and methods are disclosed to process an optical signal using a pre-processor to populate a non-linearity compensation data structure based on a set of predetermined rules in a non-real-time off-line mode; and an amplifier applying said predetermined rules in real-time to one or more channel input data using the data structure to determine a non-linearity compensation output. | 04-05-2012 |
20120212801 | MULTI-CHANNEL FIBER LASER AMPLIFIER COMBINING APPARATUS INCLUDING A TAPERED FIBER BUNDLE HAVING MULTIPLE FIBER OUTPUTS - An optical system including a plurality of fibers each providing a fiber beam and at least one tapered fiber bundle. The tapered fiber bundle includes a plurality of input end fibers, a plurality of output end fibers and a center bundle portion, where each input end fiber is coupled to a separate one of the fibers, and where the bundle portion combines all of the fiber beams received by the input end fibers into a single combined beam and each output end fiber is capable of receiving the combined beam separately from the other output end fibers. The optical system also includes a plurality of optical output channels where each optical output channel is coupled to a separate one of the output end fibers. | 08-23-2012 |
20120212802 | MULTI-CHANNEL FIBER LASER AMPLIFIER COMBINING APPARATUS INCLUDING INTEGRATED SPECTRAL BEAM COMBINATION AND A TAPERED FIBER BUNDLE HAVING MULTIPLE FIBER OUTPUTS - A fiber laser amplifier system including a plurality of master oscillators each generating a signal beam at a different wavelength. A splitter for each master oscillator splits the signal beam into a plurality of fiber beams to be separately amplified. A separate tapered fiber bundle receives the amplified beam for each master oscillator, where each tapered fiber bundle includes a plurality of input end fibers, a plurality of output end fibers and a center bundle portion, where each input end fiber is coupled to a separate one of the fiber amplifiers, where the bundle portion combines all of the fiber beams received by the input end fibers into a single combined beam and each output end fiber is capable of receiving the combined beam separately from the other output end fibers. A separate optical output channel receives one of the output end fibers from each tapered fiber bundle. | 08-23-2012 |
20120243074 | SEMICONDUCTOR OPTICAL AMPLIFIER - A semiconductor optical amplifier includes an input-side optical amplifier waveguide section that has a first active core layer. An output-side optical amplifier waveguide section connects to the input-side optical amplifier waveguide section and has a second active core layer that is wider than the first active core layer. The width of the first active core layer and relative refractive index difference between the first active core layer and adjacent clad section in the width direction of the first active core layer, and the width of the second active core layer and relative refractive index difference between the second active core layer and adjacent clad section in the width direction of the second active core layer are set such that the carrier density and optical confinement factor in the first active core layer are higher than the carrier density and optical confinement factor in the second active core layer. | 09-27-2012 |
20120243075 | GAIN-CLAMPED SEMICONDUCTOR OPTICAL AMPLIFIERS - A gain-clamped semiconductor optical amplifier comprises: at least one first surface; at least one second surface, each second surface facing and electrically isolated from a respective first surface; a plurality of nanowires connecting each opposing pair of the first and second surfaces in a bridging configuration; and a signal waveguide overlapping the nanowires such that an optical signal traveling along the signal waveguide is amplified by energy provided by electrical excitation of the nanowires. | 09-27-2012 |
20120300289 | LIGHT AMPLIFIER AND LASER PROCESSING DEVICE - A peak value detector detects power of an output light pulse which is output from the light amplifying fiber. A light receiving element receives a group of light pulses including a plurality of pulses and converts the group of light pulses into a current signal. The current/voltage converter circuit converts the current output from the light receiving element to voltage. The integration circuit integrates the voltage output from the current/voltage converter circuit. A programmable gain amplifier (PGA) amplifies the signal output from the integration circuit and provides the signal for the A/D converter circuit. The gain of the PGA is set by a gain setting signal from the signal processing circuit. The signal processing circuit adjusts the gain of the PGA so that the gain increases as the repetition frequency of the group of pulses increases. | 11-29-2012 |
20120300290 | PULSED LIGHT SOURCE - The invention relates to a pulsed light source capable of effectively utilizing optical power and selecting the pulse width of output pulsed light. A pulsed light source has a MOPA structure, and comprises a seed light source and an optical fiber amplifier. The seed light source includes a semiconductor laser outputting pulsed light. In the optical fiber amplifier, an optical filter branches pulsed light amplified by a YbDF into a first wavelength component including the peak wavelength and the remaining second wavelength component. An optical switch outputs one of the pulsed light of the first wavelength component and the pulsed light of the second wavelength component which are inputted. Another YbDF amplifies the pulsed light outputted from the optical switch. | 11-29-2012 |
20120314277 | OPTICAL MODULATOR AND OPTICAL MODULATION METHOD - An optical modulator includes first and second modulation waveguides, a demultiplexer, first and second phase adjustment waveguides that changes phases of a light of the first and second modulation waveguides, a multiplexer that combines light outputs from the first and second phase adjustment waveguides, a gain controller and a modulator bias controller in which voltages of the first and second modulation signals are controlled so that a result of adding light from the first modulation waveguide to light from the second modulation waveguide where light from the first modulation waveguide has a predetermined phase is equal to a result of adding light from the first modulation waveguide to light from the second modulation waveguide where light from the second modulation waveguide has a predetermined phase. A phase-adjustment bias controller that controls phase amounts changed by the first and second phase adjustment waveguides so as to cancel phase errors. | 12-13-2012 |
20120314278 | OPTICAL AMPLIFIER AND AN OPTICAL AMPLIFICATION METHOD - An optical amplifier using the evanescent light to control the optical output level is provided. The optical amplifier includes: a waveguide path transmitting an optical signal; an optical amplification unit formed on the waveguide path and amplifying the optical signal by an excitation light; an irradiation unit irradiating the excitation light to the optical amplification unit; an optical detection unit generating an electric signal which corresponds to a detected light; a branching unit branching an evanescent light being the optical signal outputted from the optical amplification unit and leaked outside the waveguide path, and focusing the evanescent light on the optical detection unit; a wavelength detection unit detecting a wavelength multiplicity of the optical signal based on the detected evanescent light; and a light amount adjustment unit adjusting a light amount of the excitation light irradiated by the irradiation unit based on the wavelength multiplicity. | 12-13-2012 |
20120320450 | FIBER-MOPA APPARATUS FOR DELIVERING PULSES ON DEMAND - A fiber-MOPA includes a seed-pulse source followed by fiber amplifier stages. The seed pulse source delivers signal pulses for performing a laser operation and delivers radiation between the seed pulses to maintain the collective average of the seed pulse power and intermediate radiation power constant. Keeping this average power constant keeps the instantaneous available gain of the fiber amplifier stages constant. This provides that the seed pulse delivery can be changed from one regime to a next without a period of instability between the regimes. | 12-20-2012 |
20130044368 | Long Reach Optical Amplification Device, Passive Optical Network, and Method for Transmitting Optical Signals - The present invention provides a long reach optical amplification device, a passive optical network and an optical signal transmission method in the communication field. The long reach optical amplification device comprises: a first optical diplexer, configured to transmit one or multiple downlink optical signal(s) from a first segment of Feeder fiber to a downlink optical amplifier; and to couple one or multiple uplink optical signal(s) amplified by a uplink optical amplifier to the first segment of Feeder fiber; the downlink optical amplifier, configured to amplify the downlink optical signal(s) and to output the amplified one or multiple downlink optical signal(s); a second optical diplexer, configured to couple the downlink optical signal(s) amplified by the downlink optical amplifier to the second segment of Feeder fiber, and to transmit the uplink optical signal(s) from the second segment of Feeder fiber to the uplink optical amplifier; and the uplink optical amplifier, configured to amplify the uplink optical signal(s) and to output the amplified uplink optical signal(s). The present invention resolves the long reach coexistence of several PON systems. | 02-21-2013 |
20130094074 | Gain medium providing laser and amplifier functionality to optical device - An optical device includes a gain medium on a substrate. The device also includes one or more laser cavities and an amplifier on the substrate. The one or more laser cavities each guides a light signal through a different region of the gain medium such that each of the light signals is amplified within the gain medium. The amplifier guides an amplified light signal through the gain medium such that the amplified light signal is amplified in the gain medium. | 04-18-2013 |
20130141781 | ULTRAFAST LASER GENERATING SYSTEM AND METHOD THEREOF - An ultrafast laser generating system comprises a laser signal generator, a laser signal amplifier and a beam splitting element. The laser signal generator is configured to generate a first nanosecond pulse laser. The laser amplifier is configured to amplify the first nanosecond pulse laser from the laser signal generator so as to generate a second nanosecond pulse laser, which includes a picosecond pulse laser. The beam splitting element is configured to receive the second nanosecond pulse laser and split the picosecond pulse laser from the second nanosecond pulse laser. | 06-06-2013 |
20130148190 | WAVELENGTH SWEEP CONTROL - Methods and apparatus for the active control of a wavelength-swept light source used to interrogate optical elements having characteristic wavelengths distributed across a wavelength range are provided. | 06-13-2013 |
20130208350 | OPTICAL SEMICONDUCTOR DEVICE - An optical semiconductor device includes: semiconductor lasers; a wave coupling section multiplexing light output by the semiconductor lasers; an optical amplifying section amplifying output light of the wave coupling section; a first optical waveguide optically connecting respective semiconductor lasers to the wave coupling section; a second optical waveguide optically connecting the wave coupling section to the optical amplifying section; a third optical waveguide optically connected to an output of the optical amplifying section; and a phase regulator located in at least one of the first, second, and third optical waveguides, and regulating phase of reflected light that is reflected at a reflecting point in the optical semiconductor device and that returns to the semiconductor lasers. The phase regulator adjusts the phase of the reflected light to decrease line width of the light output by the semiconductor lasers. | 08-15-2013 |
20130235448 | OPTICAL AMPLIFIER ARRANGEMENT - The invention relates to an optical amplifier arrangement for amplifying ultra-short pulsed laser radiation comprising a mode-locked laser ( | 09-12-2013 |
20130235449 | Optical Amplifier and Optical Transmission System - An optical amplifying apparatus that amplifies an optical signal, including an input section whereto the optical signal is inputted, a laser light source that generates laser light, the laser light source including an uncooled semiconductor laser device, an optical fiber that amplifies the optical signal by a stimulated emission based on the laser light from the laser light source, an output section that outputs the optical signal amplified by the optical fiber, and a passive optical component disposed between the optical fiber and the output section. The laser light source is thermally coupled to the optical fiber and/or the passive optical component via a thermally conductive medium. An oscillating wavelength of the laser light source is varied by increasing a temperature of the laser light source with heat generated by the optical fiber and/or the passive optical component. | 09-12-2013 |
20140002893 | FIBER AMPLIFIER SYSTEM | 01-02-2014 |
20140049810 | Tunable System For Generating An Optical Pulse Based On A Double-Pass Semiconductor Optical Amplifier - A system for generating a shaped optical pulse is disclosed. The system includes a master oscillator for generating an initial optical pulse, which is then directed to a semiconductor optical amplifier to amplify a portion of the initial optical pulse. The amplified pulse is reflected from a fiber Bragg grating to spectrally clean the amplified pulse and the reflected portion is returned back through the semiconductor optical amplifier. The semiconductor optical amplifier is activated a second time to amplify the reflected portion of the pulse. The time delay between the two activations of the semiconductor optical amplifier is selected to generate an output pulse with desired duration and/or amplitude profile over time. | 02-20-2014 |
20140049811 | PULSE LASER DEVICE AND BURST MODE USING SAME, AND METHOD FOR CONTROLLING A VARIABLE BURST MODE - The present invention relates to a pulse laser device, and more particularly, to a pulse laser device which can be operated in a burst mode, in which the output of a low-output laser generator is adjusted so as to enable the uniform control of the profile of the peak output of a final output optical pulse train, and in a variable burst mode, in which the profile of the final output optical pulse train can be controlled into an arbitrary waveform. | 02-20-2014 |
20140055842 | SEMICONDUCTOR OPTICAL ELEMENT, INTEGRATED SEMICONDUCTOR OPTICAL ELEMENT, AND SEMICONDUCTOR OPTICAL ELEMENT MODULE - A semiconductor optical element includes an optical waveguide formed on a semiconductor substrate, which includes: a single mode guide portion which guides input light in a single mode; a curved portion disposed at a downstream side of the single mode guide portion in a waveguide direction of the light and guiding the light in a single mode; and a flared portion disposed at a downstream side of the curved portion in the waveguide direction and of which waveguide width is widened toward the waveguide direction, so that the flared portion can guide the light in a single mode at an light-input side and the flared portion can guide the light in a multi-mode at a light-output side. The input light is optically-amplified by each of the active layers in the single mode guide portion, the curved portion and the flared portion by an optically-amplifying effect of the active layers. | 02-27-2014 |
20140063593 | Capacitor discharge pulse drive circuit with fast recovery - A circuit apparatus for driving short current pulses through a laser diode is disclosed. The circuit allow fast recovery time, comparable to the pulse duration. This enables high duty cycle pulse trains and bursts. The fast recovery is achieved by a passively self gated charging of the pulse circuit. | 03-06-2014 |
20140139907 | FIBER STRETCHER MODULE FOR USE IN THE 1550 NM WAVELENGTH RANGE - Embodiments of the present invention are generally related to embodiments of the present invention relate to a fiber stretchers module for use in the 1550 nm wavelength range. In one embodiment of the present invention, a fiber stretcher module for use in the 1550 nm wavelength range comprises a first fiber comprising a relative dispersion curve value of greater than about 0.0002 nm | 05-22-2014 |
20140153084 | DEVICE AND PASSIVE METHOD FOR THE COHERENT COMBINATION OF TWO AMPLIFIED AND/OR SPECTRALLY BROADENED OPTICAL BEAMS - A method and passive device for the coherent combination of two amplified and/or spectrally broadened optical beams using at least one bidirectional optical component (A1, A2), the device includes an amplitude division ring interferometer having optical splitting and recombining elements disposed so as to receive an incident optical beam (S | 06-05-2014 |
20140168755 | Methods and Apparatus Pertaining to Picosecond Pulsed Fiber Based Lasers - A pulsed fiber laser apparatus for outputting picosecond laser pulses can comprise a fiber delivered pulsed seed laser for providing picosecond optical seed pulses, and at least one optical fiber amplifier in optical communication with the fiber delivered pulsed seed laser. The optical fiber amplifier can comprise a gain optical fiber that receives and optically amplifies picosecond optical pulses by operating in a nonlinear regime wherein the picosecond optical pulses can be spectrally broadened by a factor of at least 8 during amplification thereof. The apparatus can further comprise a pulse compressor apparatus in optical communication with the optical fiber amplifier for providing compressed picosecond optical pulses. The pulse compressor apparatus can provide a dispersion of at least 50 ps/nm and can provide a compression ratio of the time duration of the picoseconds optical pulses received by the pulse compressor apparatus to the time duration of the compressed picosecond optical pulses of no greater than about 50. | 06-19-2014 |
20140177038 | LASER MACHINING SYSTEM HAVING A MACHINING LASER BEAM THAT IS ADJUSTABLE IN TERMS OF ITS BRILLIANCE - Laser machining system ( | 06-26-2014 |
20140192403 | MULTI-MODE FIBER AMPLIFIER - A laser utilizes a cavity design which allows the stable generation of high peak power pulses from mode-locked multi-mode fiber lasers, greatly extending the peak power limits of conventional mode-locked single-mode fiber lasers. Mode-locking may be induced by insertion of a saturable absorber into the cavity and by inserting one or more mode-filters to ensure the oscillation of the fundamental mode in the multi-mode fiber. The probability of damage of the absorber may be minimized by the insertion of an additional semiconductor optical power limiter into the cavity. | 07-10-2014 |
20140198377 | LASER OSCILLATOR - A single mode semiconductor laser includes a first optical resonator, which is formed by a total reflection surface and a partial reflection surface. Light emitted from the partial reflection surface of the single mode semiconductor laser enters a fiber Bragg grating, which includes a diffraction grating formed therein. The diffraction grating forms a second optical resonator in combination with the total reflection surface of the single mode semiconductor laser. A fiber amplifier amplifies a laser beam emitted from the fiber Bragg grating. | 07-17-2014 |
20140198378 | OPTICAL SEMICONDUCTOR DEVICE - An optical semiconductor device includes: semiconductor lasers; a wave coupling section multiplexing light output by the semiconductor lasers; first optical waveguides respectively optically connecting respective semiconductor lasers to the wave coupling section; a phase regulator regulating phase of reflected light that is reflected at a reflecting point located in the optical semiconductor device and that returns to the semiconductor lasers; a second optical waveguide optically connecting the wave coupling section to the phase regulator; an optical amplifying section amplifying output light of the phase regulator; and a third optical waveguide optically connecting an output of the phase regulator to the optical amplifying section. The phase regulator adjusts the phase of reflected light that returns to the semiconductor lasers to decrease line width of the light output by the semiconductor lasers. | 07-17-2014 |
20140233091 | Supercontinuum Source - A supercontinuum optical pulse source provides a combined supercontinuum. The supercontinuum optical pulse source comprises one or more seed pulse sources, and first and second optical amplifiers arranged along first and second respective optical paths. The first and second optical amplifiers are configured to amplify one or more optical signals generated by said one or more seed pulse sources. The supercontinuum optical pulse source further comprises a first microstructured light-guiding member arranged along the first optical path and configured to generate supercontinuum light responsive to an optical signal propagating along said first optical path, and a second microstructured light-guiding member arranged along the second optical path and configured to generate supercontinuum light responsive to an optical signal propagating along said second optical path. The supercontinuum optical pulse source further comprises a supercontinuum-combining member to combine supercontinuum generated in at least the first and second microstructured light-guiding members to form a combined supercontinuum. The supercontinuum-combining member comprises an output fibre, wherein the output fibre comprises a silica-based multimode optical fibre supporting a plurality of spatial modes at one or more wavelengths of the combined supercontinuum. | 08-21-2014 |
20140240818 | OPTICAL AMPLIFICATION COMPONENT AND FIBER LASER DEVICE - An optical amplification component | 08-28-2014 |
20140247477 | INTEGRATED OPTICAL STRUCTURE COMPRISING AN OPTICAL ISOLATOR - An integrated optical structure includes at least one optical isolator, having a magneto-optical layer, associated with at least one SOA optical amplifier having a waveguide having an n-doped semiconductor layer, a p-doped semiconductor layer, and an active area disposed between the n-doped semiconductor layer and the p-doped semiconductor layer. The optical isolator is disposed between an SOI base and the SOA optical amplifier's waveguide. The optical isolator's magneto-optical layer is disposed between a lower insulating layer and an upper insulating layer. The optical isolator's magneto-optical layer may be a layer of ferromagnetic metallic material, such as a Fe—Co metallic alloy, or a magnetic oxide layer. An optical device includes at least one integrated optical structure. | 09-04-2014 |
20140268309 | SUPPRESSION OF AMPLIFIED SPONTANEOUS EMISSION (ASE) WITHIN LASER PLANAR WAVEGUIDE DEVICES - Described herein are devices and techniques for suppressing parasitic modes in planar waveguide amplifier structures. One or more of the side and end facets of a planar waveguide amplifier are angled with respect to a fast axis defined in a transverse plane perpendicular to a core region. A relationship between glancing in-plane angles of incidence and threshold bevel angles θ | 09-18-2014 |
20140268310 | Spun Non-circular and Non-elliptical Core Optical Fibers and Apparatuses Utilizing the Same - Optical fibers are provided for modal discrimination which include a central core and a cladding disposed about the central core. The central core has a non-circular and non-elliptical cross-section, and it is rotated about a central axis of the optical fiber along the length of the optical fiber at a selected pitch resulting in the capability of a fundamental mode beam output for large core sizes. An optical system includes a seed optical source configured to provide a seed beam and an optical amplifier configured to receive and amplify the seed beam. The optical amplifier also includes an active optical fiber having a large mode area non-circular and non-elliptical core rotated about a central axis of said active optical fiber to provide modal discrimination and fundamental mode output. | 09-18-2014 |
20140340739 | OPTICAL AMPLIFICATION DEVICE AND METHOD OF CONTROLLING OPTICAL MODULE - An optical amplification device includes: an optical module that outputs an amplified light; and a controller that makes the optical module emit a light when an emission command is input into the controller, wherein the controller cancels an inputting of the emission command until a predetermined time passes, when a protection for forbidding a light emission of the optical module is canceled. | 11-20-2014 |
20150029580 | FIBER-OPTIC SYSTEM AND METHOD FOR MANUFACTURING SAME - In a fiber amplifier including a third optical fiber made of a double clad fiber for amplifying light and a fifth optical fiber made of a single clad fiber for transmitting the light amplified by the double clad fiber, a fourth optical fiber made of a triple clad fiber is inserted between the third optical fiber and the fifth optical fiber. | 01-29-2015 |
20150062693 | HIGH-POWER LIQUID-COOLED PUMP AND SIGNAL COMBINER - Embodiments of the present invention are generally related to a high-power liquid-cooled pump and signal combiner and methods thereof for fiber optic applications. More specifically, embodiments of the present invention relate to a pump and signal combiner capable of conveying several kilowatts of pump laser power for kilowatt class rare-earth doped fiber amplifiers without suffering thermal damage. In one embodiment of the present invention, a high-power, heat dissipating optical fiber device comprises a section of optical fiber configured to propagate light, a cooling chamber, substantially encapsulating the optical fiber, and a fluid within the cooling chamber having a refractive index selected to control the interaction and propagation of the light in the fluid. | 03-05-2015 |
20150303645 | SPECTRAL-TEMPORAL MULTIPLEXER FOR PULSED FIBER SCALING - A pulsed fiber laser amplifier system including a plurality of optical seed beam sources each generating a seed pulse beam at a different point in time and at a different wavelength than the other seed beam sources. The system further includes an optical coupler responsive to each of the seed pulse beams that outputs the pulse beams on a common optical path as a pulsed envelope beam. The system also includes a plurality of fiber amplifier stages responsive to the pulse envelope beam from the optical coupler that amplifies each pulse in the pulse envelope beam. The system further includes a spectral-temporal beam combiner that provides a separate delay for each of the amplified pulses in the pulse envelope beam so as to output a single output beam pulse that is in overlap of all of the individual amplified pulses in the pulse envelope beam. | 10-22-2015 |
20150331185 | PLASMONIC OPTICAL WAVEGUIDE USING PLASMONIC COUPLING BETWEEN NANO-APERTURE AND NANO-PARTICLE - The present invention relates to a plasmonic optical waveguide using plasmonic coupling between a nano-aperture and a nano-particle. The plasmonic optical waveguide includes the nano-aperture formed with an opening of a nano-scale through which light enters; and a single metal nano-particle arranged at the focal point of the nano-aperture to generate plasmon coupling in association with the light output from the nano-aperture. The plasmonic optical waveguide has an effect of forming a small and strong high-intensity high-density light spot of a sub-wavelength size, in which an amplification rate is increased at the output surface of the nano-particle more than a few hundred times compared with the incident light, since the light is transmitted by plasmon coupling generated between the nano-aperture and the nano-particle. | 11-19-2015 |
20150340835 | DIFFRACTIVE OPTICAL ELEMENTS FOR TRANSFORMATION OF MODES IN LASERS - Spatial mode conversion modules are described, with the capability of efficiently transforming a given optical beam profile, at one plane in space into another well-defined optical beam profile at a different plane in space, whose detailed spatial features and symmetry properties can, in general, differ significantly. The modules are comprised of passive, high-efficiency, low-loss diffractive optical elements, combined with Fourier transform optics. Design rules are described that employ phase retrieval techniques and associated algorithms to determine the necessary profiles of the diffractive optical components. System augmentations are described that utilize real-time adaptive optical techniques for enhanced performance as well as power scaling. | 11-26-2015 |
20160013616 | OPTICAL MODULE INSTALLING A SEMICONDUCTOR OPTICAL AMPLIFIER AND PROCESS TO ASSEMBLE THE SAME | 01-14-2016 |
20190148907 | LASER CLOCK SIGNAL GENERATORS | 05-16-2019 |