Class 359/344 - Semiconductor

Subclass of Class 359 - Optical: systems and elements
Definition: Subject matter wherein the active medium is a solid or liquid
No. of patents: 499
Last issue date: 05/29/2012

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Number	Title	Issue Date
RE43416	Semiconductor optical amplifier having a non-uniform injection current density A semiconductor optical amplifier (SOA) with efficient current injection is described. Injection current density is controlled to be higher in some areas and lower in others to provide, e.g., improved saturation power and/or noise figure. Controlled injection curren...	05/29/2012
8179592	Semiconductor optical amplifier, method for manufacturing the same, and semiconductor optical integrated device A semiconductor optical amplifier is provided having polarization independent optical amplification characteristics and a flat gain spectrum over a wide wavelength region. In the semiconductor optical amplifier including a multi-quantum well active layer formed of w...	05/15/2012
8179593	Optical-switch drive circuit and method thereof An optical-switch drive circuit including a driver unit that generates, in response to a control signal, an on/off signal for driving a semiconductor optical amplifier gate switch, and a buffer unit having a high input impedance and connected between an output termi...	05/15/2012
8149503	Reflective semiconductor optical amplifier and optical signal processing method using the same Provided are a semiconductor optical amplifier and an optical signal processing method using the same. The reflective semiconductor optical amplifier includes: an optical signal amplification region operating to allow a downward optical signal incident from the exte...	04/03/2012
8134777	Optical switch assembly and network incorporating same An optical switch assembly comprising at least two optical amplifiers (10, 20), means for applying a first input signal to one end of both amplifiers (10, 20) and a second input signal to another end, and means for simultaneously driving one or other o...	03/13/2012
8130443	Optical waveform reshaping device An optical waveform reshaping device, including a semiconductor optical waveguide which has an active layer, wherein: optical amplification regions and optical absorption regions are installed alternately along the semiconductor optical waveguide; one optical amplif...	03/06/2012
8125707	Reflective semiconductor optical amplifier (RSOA), RSOA module having the same, and passive optical network using the same A Reflective Semiconductor Optical Amplifier (RSOA) for compensating for light loss in an optical link, an RSOA module for improving polarization dependency using the RSOA, and a Passive Optical Network (PON) for increasing economical efficiency and practical use of...	02/28/2012
8125706	High-temperature interband cascade lasers A gain medium and an interband cascade laser, an interband cascade amplifier, and an external cavity laser having the gain medium are presented. The gain medium can include any one or more of the following features: (1) the active quantum well region includes a thic...	02/28/2012
8120843	Dark channel array with scattering centers In one of the embodiments, a dark channel array is provided which includes gain channels, each configured to emit an output beam from an output surface and to have a light wave propagating therethrough. It further includes a dark channel configured to emit an output...	02/21/2012
8059335	Adjustable optical signal delay module and method thereof An adjustable optical signal delay module which adjusts power of an amplified spontaneous emission generated by a semiconductor optical amplifier and feeds the adjusted amplified spontaneous emission back to the semiconductor optical amplifier in a direction opposit...	11/15/2011
8054540	Optical waveguide amplifier using high quantum efficiency silicon nanocrystal embedded silicon oxide A method is provided for optical amplification using a silicon (Si) nanocrystal embedded silicon oxide (SiOx) waveguide. The method provides a Si nanocrystal embedded SiOx waveguide, where x is less than 2, having a quantum efficiency of greater than 10%. An optical...	11/08/2011
8049957	Scalable semiconductor waveguide amplifier One embodiment of the present method and apparatus encompasses an apparatus that may have: a predetermined length, the self-imaging semiconductor waveguide having first and second opposed sides; quantum wells disposed within the self-imaging semiconductor waveguide ...	11/01/2011
8045261	Reflective semiconductor optical amplifier (RSOA), RSOA module having the same, and passive optical network using the same A Reflective Semiconductor Optical Amplifier (RSOA) for compensating for light loss in an optical link, an RSOA module for improving polarization dependency using the RSOA, and a Passive Optical Network (PON) for increasing economical efficiency and practical use of...	10/25/2011
8031398	Optical spectral filtering and dispersion compensation using semiconductor optical amplifiers The invention provides a device and a method for extending the bandwidth of short wavelength and long wavelength fiber optic lengths. The invention provides for an optical transmitter package device comprising: a laser diode; and a semiconductor optical amplifier co...	10/04/2011
7929202	Semiconductor optical amplifier having a non-uniform injection current density A semiconductor optical amplifier (SOA) with efficient current injection is described. Injection current density is controlled to be higher in some areas and lower in others to provide, e.g., improved saturation power and/or noise figure. Controlled injection curren...	04/19/2011
7920322	Reflective semiconductor optical amplifier (R-SOA) with dual buried heterostructure Provided are a reflective semiconductor optical amplifier (R-SOA) and a superluminescent diode (SLD). The R-SOA includes: a substrate; an optical waveguide including a lower clad layer, an active layer independent of the polarization of light, and an upper clad laye...	04/05/2011
7916387	Methods and apparatus for swept-source optical coherence tomography In one embodiment of the invention, a semiconductor optical amplifier (SOA) in a laser ring is chosen to provide low polarization-dependent gain (PDG) and a booster semiconductor optical amplifier, outside of the ring, is chosen to provide high polarization-dependen...	03/29/2011
7911686	Optical module and optical communication system An optical module, which is arranged in an optical transmission path, includes an optical amplifying unit configured with a semiconductor, wherein the optical amplifying unit amplifies light input from the optical transmission path, and an optical element configured...	03/22/2011
7864412	Semiconductor optical amplifier device amplifying external light signal and driving apparatus therefor An active layer has a quantum well structure formed of InGaAsP, and includes a saturable absorption region and optical amplification regions. To the saturable absorption region, a voltage is applied through a p-electrode, independent from the optical amplification r...	01/04/2011
7859745	Semiconductor optical amplifying device, semiconductor optical amplifying system and semiconductor optical integrated element A polarization-independent SOA having an InP substrate used as a semiconductor substrate, and an active layer taking an MQW structure formed of a barrier layer made of GaInAs with tensile strain applied thereto and a well layer made of GaInNAs with no strain applied...	12/28/2010
7859746	Semiconductor optical amplifier A polarization-independent SOA is provided which uses an InP substrate (11) as a semiconductor substrate and uses GaInNAs having introduced tensile strain as an active layer (14). With this configuration, the polarization independence is achieved by in...	12/28/2010
7821704	Compact, tunable, efficient IR laser and IR guiding silica fibers An IR laser source providing light in the IR spectrum, the laser source comprising a pump laser operating at a frequency equivalent to wavelength shorter than 2 μm and at a predetermined power, and an optic fiber coupled to the pump laser. The optic fiber has at le...	10/26/2010
7808698	Semiconductor device A semiconductor device including a semiconductor optical amplifier in which a photodetector is integrated without causing power loss at a low cost. The semiconductor device includes a semiconductor substrate, a semiconductor optical waveguide, at least partly capabl...	10/05/2010
7791793	Semiconductor optical amplifier gate switch drive circuit, semiconductor optical amplifier gate switching device, and optical cross connect A drive circuit is provided for a semiconductor optical amplifier type gate switch includes a first transmission path and a second transmission path. The first transmission path includes a common first sub-path between a signal source and a first node; and an indivi...	09/07/2010
7787176	On-chip optical amplifier An on-chip amplifier includes first element that curtails the velocity of an incoming light to the amplifier. A second element is doped so as to make the frequency of the incoming light equal to the electron frequency in order to allow for electron-photon wave inter...	08/31/2010
7738167	Reflective semiconductor optical amplifier (RSOA), RSOA module having the same, and passive optical network using the same A Reflective Semiconductor Optical Amplifier (RSOA) for compensating for light loss in an optical link, an RSOA module for improving polarization dependency using the RSOA, and a Passive Optical Network (PON) for increasing economical efficiency and practical use of...	06/15/2010
7724425	Apparatus and methods for optical amplification in semiconductors Methods and corresponding apparatus for optical amplification in semiconductors, particularly indirect band-gap semiconductors, and most particularly in silicon. A first aspect of the invention employs certain doping elements to provide inter-band-gap energy levels ...	05/25/2010
7719758	Optical amplifier provided with control function of pumping light, and optical transmission system using the same In an optical transmission system according to one aspect of the present invention, for transmitting a WDM light from a transmission station to a reception station, utilizing a Raman amplifier, the Raman amplifier comprises: an optical amplification medium; a pumpin...	05/18/2010
7692853	Semiconductor optical amplifier pulse reshaper A pulse reshaper for reshaping and re-amplifying optical signals in a communications network by adjusting threshold and amplification characteristics of a semiconductor optical amplifier (SOA) having first and second reflective regions optically cooperating at each ...	04/06/2010
7688502	Three-terminal optical signal amplifying device In the three-terminal optical signal amplifying device 10, a portion of the neighboring light LS at other wavelength than that of the first wavelength λ1 that is selected from the output light from the element 14 by the optical a...	03/30/2010
7688501	Optical transmission system and optical amplification method used in the system At an optical transmission system that uses plural light sources for Raman amplification, even when a failure occurred in a pumping light source in one of the light sources for Raman amplification, the signal light output level and its wavelength characteristic are ...	03/30/2010
7679819	Feed-forward current injection circuits and semiconductor optical amplifier structures for downstream optical signal reuse method A reflective semiconductor optical amplifier (RSOA) and an operating system based on a downstream optical signal reuse method with feed-forward current injection are provided. The RSOA has two active regions and includes a reflecting plane that reflects an input opt...	03/16/2010
7643207	Semiconductor optical amplifier with lateral and distributed gain stabilisation A stabilised gain semiconductor optical amplifier (CG-SOA) includes and active waveguide (1) comprising an amplification medium (2), extending in longitudinal (Z), lateral (X) and vertical (Y) directions, and coupled to a laser oscillation structure co...	01/05/2010
7633674	SOA-MZI device fault isolation A photonic integrated circuit having a plurality of circuit components, is disclosed, which may include an MMI for splitting signal power passing therethrough among first and second optical pathways coupled to first and second outputs, respectively, of the MMI, ther...	12/15/2009
7616377	Optical repeater On the upstream side of a quantum dot optical amplifier, a polarization beam splitter with one input and two outputs is provided. Two optical fibers connected to output sections of the polarization beam splitter are connected to input sections of the quantum dot opt...	11/10/2009
7605974	Method and apparatus for PPM demodulation using a semiconductor optical amplifier An optical pulse position modulation receiver relying on the gain dynamics in a semiconductor optical amplifier (SOA). Optical PPM signal pulses and periodic optical clock pulses at a different frequency and/or polarization than the signal pulses are coupled into an...	10/20/2009
7554721	Raman amplifier and Raman amplifier adjustment method A pumping unit supplies pumping light to a fiber connecting medium; a light monitoring unit detects light power of multiple-wavelength light; and a control unit controls the pumping light based on light power detected by the light monitoring unit and connecting medi...	06/30/2009
7545560	AlAs/GaAs alloy to enhance n-type doping in AlGaAs distributed bragg reflector Distributed Bragg reflector (DBR) with reduced DX centers. A DBR includes an AlAs region. The AlAs region includes essentially homogeneous AlAs. The DBR further includes a A1GaAs region. The AlGaAs region includes alternating thin layers of AlAs and GaAs. The altern...	06/09/2009
7542201	Semiconductor optical amplification device and optical integrated circuit A semiconductor optical amplification device is disclosed that has a gain spectrum of a wide bandwidth. The semiconductor optical amplification device includes an InP substrate and an active layer on the InP substrate. The active layer has a quantum well structure f...	06/02/2009
7535633	Laser amplifiers with high gain and small thermal aberrations The present invention discloses a laser amplifier with high gain and low thermally induced optical aberrations on the amplified laser beam. The amplifier designs allow simple multipass configurations to optimally extract the gain and reduce thermally induced index o...	05/19/2009

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Class 359/344 - Semiconductor