Including specific optical elements
Subclass of:
398 - Optical communications
398182000 - TRANSMITTER
Patent class list (only not empty are listed)
Deeper subclasses:
Class / Patent application number | Description | Number of patent applications / Date published |
---|---|---|
398201000 | Including specific optical elements | 34 |
20080219679 | OPTICAL BRANCHING DEVICE - An optical branching device comprises a first lens member comprising a transmitting plane surface, a transmitting convex surface having an approximate center of curvature in the transmitting plane surface, and a first optical fiber and a second optical fiber firmly affixed on the transmitting plane surface of the first lens member. The transmitting convex surface has a wavelength-selective mirror surface that transmits light of a first wavelength and reflects light of a second wavelength. The light of the second wavelength, which is one of the wavelengths of light emitted from the first optical fiber and is reflected and converged by the wavelength-selective mirror surface, enters into the second optical fiber. | 09-11-2008 |
20080285984 | Device and Method for the Homogenisation of Optical Communication Signals - The invention provides a method and apparatus for providing a uniform output from an optical transmitter. The invention comprises at least one discrete light source ( | 11-20-2008 |
20090196631 | MONOLITHIC POWER MONITOR AND WAVELENGTH DETECTOR - Monolithic single and/or dual detector structures are fabricated on the emitting surface of a VCSEL and/or on a lens or glass substrate configured to be positioned along the axis of emission of an optical light source. Each monolithic detector structure includes one or two PIN detectors fabricated from amorphous silicon germanium with carbon doping or amorphous germanium with hydrogen doping. The monolithic detectors may additionally include various metallization layers, buffer layers, and/or anti-reflective coatings. The monolithic detectors can be grown on 1550 NM VCSELs used in optical transmitters, including lasers with managed chirp and TOSA modules, to reduce power and real estate requirements of the optical transmitters, enabling the optical transmitters to be implemented in long-reach SFP+ transceivers. | 08-06-2009 |
20100021184 | APPARATUS AND METHOD FOR HANDLING AN OPTICAL SIGNAL - An apparatus for handling an optical signal includes: an optical transmitting unit transmitting the optical signal from an input locus to an output locus. The optical transmitting unit includes a plurality of optical transmitting sections. Each respective optical transmitting section of the plurality of optical transmitting sections has a respective length and a respective attenuation gradient to establish a respective length-and-attenuation gradient configuration. Each respective optical transmitting section effects attenuation of the optical signal according to its respective length-and-attenuation gradient configuration. | 01-28-2010 |
20100046964 | Apparatus and Method for Reduction of Crosstalk of an Optical Transmitter - In accordance with an example embodiment of the present invention, an apparatus is provided, comprising a portion of semiconductor comprising an optical transmitter and an optically sensitive structure, wherein the semiconductor is covered with an interference filter at least in a first area comprising at least part of the optical transmitter and a second area comprising at least part of the optically sensitive structure, and wherein the interference filter of the first area is substantially optically separate from the interference filter of the second area. | 02-25-2010 |
20100183318 | LASER DIODE DRIVER WITH BACK TERMINATOR AND OPTICAL TRANSMITTER PROVIDING THE SAME - An LD-Driver with a back termination circuit is disclosed. The back termination circuit of the invention provides a transistor as an active device, a current source to provide a bias current to the transistor, and a resistor as a passive element that couples the transmission lines carrying a differential signal thereon. Because the transistor shows a differential resistance of several tens of ohms by providing only a few milli-amperes, the output impedance of the LD-Driver may be substantially matched with the characteristic impedance of the transmission line with lesser additional power consumption. | 07-22-2010 |
20100266295 | OPTICAL-SIGNAL-PATH ROUTING IN A MULTI-CHIP SYSTEM - Embodiments of a system are described. This system includes an array of chip modules (CMs) that are configured to communicate data signals with each other via optical communication. In a given CM module, optical signal paths, such as waveguides, are routed in the same way as in the other CMs in the array. In this way, a common optical design in the CMs may be used in the system to prevent data conflicts during the optical communication. | 10-21-2010 |
20100296820 | FREE SPACE OPTICAL INTERCONNECT - A system such as a server ( | 11-25-2010 |
20110026936 | OPTICAL COMMUNICATION MODULE - To reduce optical axis misalignment in an optical communication module, the optical communication module | 02-03-2011 |
20110026937 | OPTICAL COMMUNICATION MODULE - To reduce a size of an optical communication module. There is provided an optical communication module | 02-03-2011 |
20110170879 | FREQUENCY UP-CONVERSION SYSTEM AND METHOD FOR THE SAME - A frequency up-conversion system includes an optical splitter, an optical modulator, an optical phase-shifter, and an optical coupler. In one embodiment of the present disclosure, the optical splitter is configured to split an optical wave into a first optical wave and a second optical wave, the optical modulator is configured to modulate the first optical wave to form a modulation wave, the optical phase-shifter is configured to shift the phase of the second optical wave by a predetermined phase to form a shifting wave, and the optical coupler is configured to couple the modulation wave and the shifting wave. In one embodiment of the present disclosure, the optical modulator and the optical phase-shifter are connected in a parallel manner. | 07-14-2011 |
20110170880 | VARIABLE OPTICAL ATTENUATOR INTEGRATION INTO TRANSMITTER OPTICAL SUBASSEMBLIES - A small-scale VOA system includes a polarization rotator, a voltage multiplier circuit, and at least one transistor. The polarization rotator can be positioned within a TOSA along the emission axis of a corresponding optical signal source in addition to one or more polarizers. A microcontroller provides a first low voltage control signal to a voltage multiplier to generate a large voltage DC signal which is provided to the transistor. The transistor modulates the large voltage signal with a second control signal from the microcontroller to generate a large voltage AC signal for driving the polarization rotator. The polarization rotation of the polarization rotator can be altered depending on the applied large-voltage AC signal. As a result, the polarization rotator and one or more polarizers can variably attenuate signals emitted by the optical signal source or act as a shutter. | 07-14-2011 |
20110236034 | ILLUMINATION DEVICE AND METHOD FOR EMBEDDING A DATA SIGNAL IN A LUMINANCE OUTPUT USING AC DRIVEN LIGHT SOURCES - The invention relates to an illumination device connectable to an AC voltage source for applying an alternating voltage during a series of time intervals. The illumination device comprises at least a first light source and a second light source, arranged to be connected in series to the AC voltage source, to generate a luminance output in response to the alternating voltage. Selection means are provided configured for selectively applying the alternating voltage over the first light source or the first and second light source. A controller is provided for controlling the selection means in response to a data signal comprising data symbols such that one or more of the data symbols are contained in said luminance output. The invention also relates to a method of embedding one or more data symbols in the luminance output of such an illumination device, an optical receiver and an illumination system. | 09-29-2011 |
20110249980 | OPTICAL COMMUNICATION MODULE AND OPTICAL COMMUNICATION DEVICE - An optical communication module and an optical communication device including the same are provided. For example, a first semiconductor chip on which a laser diode is formed and a second semiconductor chip on which a laser diode driver circuit, etc. for subjecting the laser diode to drive by current are formed are mounted on a package printed circuit board to be close to each other. Temperature detecting means is further formed on the second semiconductor chip (laser diode driver circuit, etc.). The temperature detecting means detects a temperature variation ΔT of the first semiconductor chip (laser diode) transmitted via a wiring in the package printed circuit board and controls the magnitude of the driving current of the laser diode driver circuit based on a detection result. | 10-13-2011 |
20120045223 | DRIVER AND OPTICAL TRANSMISSION APPARATUS - A driver circuit includes a plurality of delay circuits and an inverter. The plurality of delay circuits delay branched driving signals. The inverter inverts at least one of the branched driving signals. At least one of the plurality of delay circuits is at least one variable delay circuit delaying a variable amount of delay. The output driving signal is output by combining the inverted signal of the branched driving signal output via at least one inverter and at least one non-inverted signal of the branched driving signals output from the delay circuits. | 02-23-2012 |
20120076505 | THERMAL MANAGEMENT OF A LOCKER ETALON IN A TRANSMITTER OPTICAL SUBASSEMBLY - Thermal management of a locker etalon in a transmitter optical subassembly (TOSA). In one example embodiment, a TOSA includes a case, a laser positioned within the case and electro-thermally connected to the case, a locker etalon positioned in the case and thermally connected to the case, and a thermoelectric cooler (TEC) positioned within the case and in thermal contact with both the laser and the locker etalon. | 03-29-2012 |
20120106981 | LASER DRIVER AND OPTICAL TRANSMITTER IMPLEMENTING THE SAME - An LD-Driver with the push-pull arrangement is disclosed. The driver includes the high side driver driven by the positive phase signal and the low side driver driven by the negative phase signal. When the positive phase signal is in HIGH, the high side driver becomes ON and the LD driver provides additional current to the bias current for the LD; while, when the negative phase signal is in HIGH, the low side driver becomes ON and the LD driver extracts a portion of the bias current for the LD. | 05-03-2012 |
20120128375 | INTEGRATED SEMICONDUCTOR LASER ELEMENT, SEMICONDUCTOR LASER MODULE, AND OPTICAL TRANSMISSION SYSTEM - An integrated semiconductor laser element includes: semiconductor lasers that oscillate at different oscillation wavelengths from one another, each laser oscillating in a single mode; an optical coupler; and a semiconductor optical amplifier. At least one of active layers of the semiconductor lasers and an active layer of the semiconductor optical amplifier have a same thickness and a same composition that is set to have a gain peak wavelength near a center of a wavelength band formed by the oscillation wavelengths. The semiconductor optical amplifier includes: an equal width portion formed on a side of the optical coupler to guide light in a single mode; and an expanded width portion formed on a light output side. The width of the expanded width portion is set according to a total thickness of well layers of the active layer of the semiconductor optical amplifier. | 05-24-2012 |
20120141143 | OPTICAL COMMUNICATION MODULE - It is expected to provide an optical communication module that does not require making a conductive plate, such as a leadframe, become thinner in response to the downsizing of the photoelectric conversion device, such as a laser diode or a photodiode, and does not require downsizing a lens. A laser diode is connected and fixed to a conductive plate on the top surface of a transparent light-passing board. The light-passing board is connected and fixed to a conductive plate on the top surface of a transparent base. A first lens and a second lens are integrally formed on the top and the bottom surfaces of the base, respectively. The laser diode performs transmission of optical signals through the gap of conductive plate, the transparent light-passing board, the opening portion of a conductive plate, the opening portion of conductive plate, the first lens, the transparent base and the second lens. | 06-07-2012 |
20120170945 | DYNAMIC COMMUNICATION SPLITTER - Methods and systems for splitting an initiated signal are disclosed. An exemplary system may include a transmitter configured to selectively transmit an initiated signal, and a signal splitter in communication with the transmitter. The signal splitter may be configured to selectively split the initiated signal into a plurality of recipient signals for a plurality of recipient lines in communication with the transmitter. The signal splitter may be configured to selectively modify a number of recipient signals, e.g., by adjusting a spot size of the initiated signal on the signal splitter. | 07-05-2012 |
20120189323 | MULTI-LASER TRANSMITTER OPTICAL SUBASSEMBLY - Multi-laser transmitter optical subassembly (TOSAs) for an optoelectronic module. In one example embodiment, a method of fabricating a multi-laser TOSA includes various acts. First, first and second optical signals are transmitted from first and second lasers, respectively. Next, the angle of a first minor actively adjusted to reflect the first optical signal toward a first filter that reflects the first optical signal and transmits the second optical signal such that the first and second optical signals are aligned and combined. | 07-26-2012 |
20120294628 | LIGHT SOURCE UNIT AND COMMUNICATION APPARATUS - To provide a small light source unit that can be used for quantum encryption communication. Provided is a light source unit including a first reflector having a reflectance R | 11-22-2012 |
20130188970 | Packaging Platform For Opto-Electronic Assemblies Using Silicon-Based Turning Mirrors - An apparatus for transmitting optical signals includes an interposer for supporting opto-electronic components used to create optical output signals. An enclosure is used to encapsulate the populated interposer assembly and includes a silicon sidewall and a transparent lid. The sidewall is etched to include a turning mirror feature with a reflecting surface at a predetermined angle θ, the turning mirror disposed to intercept the optical output signals and re-direct them through the enclosure's transparent lid. A coverplate is disposed over and aligned with the enclosure, where the coverplate includes a silicon sidewall member that is etched to include a turning mirror element with a reflecting surface at the same angle θ as the enclosure's turning mirror element. The optical signals re-directed by the enclosure then pass through the transparent lid of the enclosure, impinge the turning mirror element of the coverplate, and are then re-directed along the longitudinal axis. | 07-25-2013 |
20130209110 | SMALL-MODE-VOLUME, VERTICAL-CAVITY, SURFACE-EMITTING LASER - A small-mode-volume, vertical-cavity, surface-emitting laser (VCSEL). The VCSEL includes an active structure to emit light upon injection of carriers, and two reflecting structures at least one of which is a grating reflector structure. The active structure is disposed within at least one of the reflecting structures. The reflecting structures are configured as a vertical-cavity resonator of small mode-volume. An optical-bus transmitter including a plurality of small-mode-volume VCSELs, and a system including at least one optical bus and at least one optical-bus transmitter in a digital-information processor, or a data-processing center, are also provided. | 08-15-2013 |
20140044438 | SURFACE EMITTING SEMICONDUCTOR LASER, MANUFACTURING METHOD FOR SURFACE EMITTING SEMICONDUCTOR LASER, SURFACE EMITTING SEMICONDUCTOR LASER DEVICE, OPTICAL TRANSMISSION DEVICE, AND INFORMATION PROCESSING DEVICE - A surface emitting semiconductor laser includes a first semiconductor multilayer reflector of a first conductivity type, an active area, a second semiconductor multilayer reflector of a second conductivity type, a current confinement layer having a conductive area and a surrounding high-resistance area, each provided on a substrate, and a higher-order transverse mode suppressing layer formed on an emission surface from which laser light is emitted and in an area in which higher-order transverse mode is induced. The higher-order transverse mode suppressing layer includes first to third insulation films having first to third refractive indices, respectively, formed on each other, and capable of transmitting an oscillation wavelength. The second refractive index is lower than the first refractive index. The third refractive index is higher than the second refractive index. The optical film thickness of the first to third insulation films is an odd number times one-fourth of the oscillation wavelength. | 02-13-2014 |
20140341593 | Method And Apparatus For Optical Transmission In A Communication Network - A manner of mitigating the self heating effect of a laser or other light source such as a laser in a network node of a communication network. A self-heating mitigation module is provided, the self-heating mitigation module includes one or both of a self-heating adjustment module to accelerate self heating at the beginning of a transmission and a sub-threshold lasing module that applies a sub-threshold current between transmissions. The self-heating adjustment module and the sub-threshold lasing module are preferable both used together and driven by a common signal, for example the burst_enable signal that facilitates transmission from the light source. | 11-20-2014 |
20150055962 | Laser or Amplifier Optical Device Seeded with Nonlinearly Generated Light - An optical apparatus comprising an optical source for providing output light for providing input signal light can comprise a pump source for pumping a four wave mixing (FWM) process with light pulses (“FWM pump light”); a FWM element in optical communication with said pump source, said FWM element configured for hosting the FWM process to generate, responsive to the FWM pump light, pulses of FWM signal light and FWM idler light having different wavelengths; and a laser or amplifier optical device comprising a gain material for providing optical gain at a gain wavelength via a process of stimulated emission responsive to optical pumping with pump light, said laser or amplifier optical device in optical communication with said optical source and receiving one of the FWM signal light and the FWM idler light as input signal light having the gain wavelength for optically seeding with input signal light the laser or amplifier optical device. | 02-26-2015 |
20150063829 | FAST THIN-FILM LIGHT EMITTING DIODE - A thin-film Light Emitting Diode (LED) and methods of manufacturing the same are disclosed. Specifically, the thin-film LED is provided with an epitaxial layer having a proton implantation that controls the size of the active volume. Controlling the size of the active volume enables the thin-film LED to enjoy decreased rise and fall times, thereby achieving a thin-film LED that is useable for transmission in high transmission rate communication systems. | 03-05-2015 |
20150063830 | CONTINUOUS WAVE ULTRAVIOLET LASER BASED ON STIMULATED RAMAN SCATTERING - The present application is directed to a laser system using Stimulated Raman Scattering and harmonic conversion to produce a continuous wave ultraviolet wavelength output signal. More specifically, the laser system includes a pump source configured to generate at least one pump signal, a resonant cavity resonant at a Stokes wavelength in optical communication with the pump source, a SRS gain device positioned within the resonant cavity and configured to generate at least one SRS output signal at a Stokes wavelength when pumped with the pump signal, and a harmonic conversion device positioned within the resonant cavity and configured to produce a continuous wave second harmonic output signal of the SRS output signal. | 03-05-2015 |
20150110503 | METHOD FOR IMPROVING LUMINOUS INTENSITY ADAPTABILITY AND DEVICE THEREOF - The invention discloses a method for improving luminous intensity adaptability and a device thereof, relating to photo-electronic communication field. In the method, the device is configured with more than one level load resistors, the device collects voltage value and if the device collects predetermined numbers of voltage values which meet some requirement, it computes an average value of all collected voltage values, sets voltage value according to the average value, determines whether the set voltage is satisfied with a predetermined requirement, if yes, collects data according to the set voltage; otherwise, switches the load resistor according to a predetermined rule, in which the load voltage has influence on collecting voltage. The invention has advantages of improving luminous intensity adaptability of a screen when collecting optical signal and reducing rate of error codes. | 04-23-2015 |
20150125162 | EFFICIENT OPTICAL COMMUNICATION DEVICE - In one embodiment, an apparatus for optical communication is disclosed. An optical sub-assembly and optical platform may form the apparatus. Lasers contained in the hermetically sealed optical sub-assembly can be coupled to a modulator on the optical platform. The optical modulator can access an optical network using beams of light sent from the laser. | 05-07-2015 |
20150125163 | WDM Mux/DeMux employing filters shaped for maximum use thereof - Filters shaped differently from those commonly used in WDM Mux/DeMux optical devices are described. Different from the prior art devices that commonly use filters shaped in cuboid, the filters in the embodiment of the present invention are shaped in parallelepiped. In other words, a cross section of such filter is not in parallelogram. According to one embodiment of the present invention, a filter is so cut that a cross section thereof presents a cutting angle not being 90 degrees. As a result, the filter is fully used in WDM Mux/DeMux optical devices. Such filters are advantageously used in compact optical modules. | 05-07-2015 |
20150125164 | Optical Apparatus - The present invention provides an optical apparatus, which is configured to output image information and comprises a housing; a light source; an optical device; an optical device earner, wherein the optical device is mounted on the optical device carrier and positioned on one side of the optical device carrier; a support plate positioned on the other side of the optical device carrier and being one part of the housing; and a connecting piece, wherein one end of the connecting piece penetrates the support plate and then is connected with the optical device carrier, and the relative positions of the connecting piece and the support plate are fixed. | 05-07-2015 |
20160036422 | CROSS-POINT SHIFTING TECHNIQUES - This disclosure describes techniques for shifting the cross-point of a digital signal in an optical transmitter. The cross-point shifting techniques may use multiple differential transconductors with their common polarity outputs coupled together to shift the cross-point of a signal. Using multiple differential transconductors in this manner may increase the balance between the positive and negative polarities of the resulting cross-point shifted signal relative to other types of cross-point shifting techniques, which may improve the quality of an optical signal generated by an optical transmitter. | 02-04-2016 |