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7627017 |
Laser amplifier and method of making the same
The present invention includes a laser amplifier and a method of making the same. The laser amplifier of the present invention includes a gain medium layer having a first index of refraction, and a...
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7626757 |
Multi-band hybrid SOA-raman amplifier for CWDM
A multi-band hybrid amplifier is disclosed for use in optical fiber systems. The amplifier uses Raman laser pumps and semiconductor optical amplifiers in series to produce a relatively level gain...
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7615791 |
Semiconductor optical device
A semiconductor optical device comprises a lower cladding layer of a first conductive type, an upper cladding layer of a second conductive type, and an active layer. The lower cladding layer has a...
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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...
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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...
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7567377 |
Multiband amplifier based on discrete SOA-Raman amplifiers
Several discrete hybrid amplifiers are used in parallel for amplifying an optical signal in an optical fiber system. An optical signal is first split into two or more separate signals each with a...
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7561605 |
Extreme chirped/stretched pulsed amplification and laser
Methods, devices and systems for generating ultrashort optical linear chirped pulses with very high power by amplifying the pulses so that their temporal duration is longer than the storage time of...
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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...
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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...
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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...
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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...
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7532392 |
Dark channel array
In one embodiment, a dark channel array is provided which includes gain channels, each gain channel being configured to emit an output beam, and which includes a dark channel configured to cause...
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7525726 |
Photonic crystal semiconductor device and production method thereof
To provide a photonic crystal semiconductor device which enables various kinds of optical devices having a photonic crystal structure which is readily formed using a semiconductor and a...
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7515333 |
Nanotechnology-enabled optoelectronics
Nanomaterials for use in optoelectronic applications, and particularly nanocomposite optical amplifiers. nanocomposite optical amplifiers (NOAs), e.g., provided on integrated optical chips, for...
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7508576 |
Digital signal regeneration, reshaping and wavelength conversion using an optical bistable silicon raman laser
An optical bistable silicon Raman laser is disclosed, which provides digital signal regeneration, reshaping and wavelength conversion. An apparatus according to aspects of the present invention...
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7495826 |
Hybrid integrated optical communication module comprising silicon-rich silicon oxide optical amplifier, and method for fabricating same
An optical signal amplifier capable of compensating the attenuation of optical signals during transmission is provided. The optical signal amplifier includes: a substrate having first and second...
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7489440 |
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...
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7489439 |
Semiconductor Raman ring amplifier
A semiconductor-based Raman ring amplifier is disclosed. A method according to aspects of the present invention includes directing a pump optical beam having a pump wavelength and an input pump...
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7486437 |
Apparatus and method for optical amplification in indirect-gap 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...
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7474460 |
Optical modulation apparatus
An optical modulation apparatus is provided which implements a stable amplifying function by reducing the effect of reflected light rays from end faces of a bidirectional optical amplifier by...
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7457033 |
MEMS tunable vertical-cavity semiconductor optical amplifier
A MEMS-tunable semiconductor optical amplifier (SOA). A device in accordance with the present invention comprises a substrate, a first mirror, coupled to the substrate, a second mirror, an active...
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7453629 |
Semiconductor optical amplifier pulse reshaper
A system includes a pulse reshaper for reshaping and re-amplifying optical signals in a communications network. In one embodiment, a vertical cavity semiconductor optical amplifier (VCSOA) device,...
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7440179 |
SOA-MZI device fault isolation
The method of isolating faults internal to, for example, from tonic integrated circuits by diverting a portion of certain input and output signals to integrated photo detectors. By analyzing the...
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7440180 |
Integration of rare-earth doped amplifiers into semiconductor structures and uses of same
An integrated device is disclosed which has a substrate and a Rare-Earth Doped Semiconductor layer (REDS layer) integrated with the substrate. The REDS layer is patterned to define one or more...
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7437083 |
Wavelength converter
A wavelength converter for binary optical signals includes an interferometer structure ( 110 ) for generating an output signal by modulating a received local signal (LS) according to the modulation...
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7436586 |
Wavelength conversion system, optical integrated device and wavelength conversion method
A wavelength conversion system includes a Mach-Zehnder interferometer including two optical waveguides, a non-linear medium provided on one of the two optical waveguides, and a branching ratio...
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7400807 |
Apparatus and method for a waveguide with an index profile manifesting a central dip for better energy extraction
A method and apparatus is described that use an index-of-refraction profile having a significant central dip in refractive index (or another tailored index profile) within the core of a gain fiber...
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7379677 |
Method of wavelength conversion and wavelength converter
The wavelength converter comprises (1) an optical multiplexer for multiplexing an amplitude-modulated first light and reference light, which is continuous light having a wavelength different from...
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7375879 |
Structure with saturable optical absorbent for device for regenerating optical signals
The field of the invention is that of devices for regenerating optical signals. It applies more particularly to systems for high-throughput long distance transmission by optical fibres of digital...
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7375878 |
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...
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7369779 |
Regeneration of optical phase modulated signals
A regenerator for restoring the originally encoded optical phase of a differential-phase-shift-keyed signal. In an embodiment, the regenerator simultaneously provides limiting amplification and...
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7365904 |
Optical wavelength converter
An optical wavelength converter includes: a first branch passage and a second branch passage receiving direct current light, one of the first branch passage and the second branch passage receiving...
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7362498 |
Method and apparatus for controlling a semiconductor optical amplifier for use in a passive optical network
An optical amplifier including: an amplifier having an input port and an output port, which is disposed along a main signal line of the optical amplifier; a dummy laser generation circuit having an...
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7359113 |
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.,...
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7355785 |
Gain-clamped semiconductor optical amplifier
A gain-clamped semiconductor optical amplifier is disclosed. The amplifier includes a gain waveguide for amplifying an optical signal input to the gain waveguide, and a grating layer, in contact...
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7345812 |
Method and apparatus for use of III-nitride wide bandgap semiconductors in optical communications
The present disclosure relates to the use of III-nitride wide bandgap semiconductor materials for optical communications. In one embodiment, an optical device includes an optical waveguide device...
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7342713 |
Non-inverting cross-gain modulation-based wavelength converter
Wavelength converter and methods are based on cross-gain modulation. The wavelength converter has two semiconductor optical amplifiers to perform double cross-gain modulations and double...
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7339726 |
Modulating retroreflector array using vertical cavity optical amplifiers
A vertical cavity semiconductor optical photoamplifer (VCSOA) is used as a modulating retro-reflector (MRR) as a pixel in an array. The boundary of the cavity in the VCSOA forms a mirror for...
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7333691 |
Low loss tunable ring resonator allpass filter
An apparatus, including an optical ring resonator having a waveguide ring with substantially straight waveguide segments and bent waveguide segments. The bent waveguide segments are optically...
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7330304 |
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...
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7319555 |
Integrated performance monitoring, performance maintenance, and failure detection for photonic regenerators
Monitoring of the input power is performed on-chip and is used to monitor and maintain performance, detect failure and trigger network protection strategies. An optical power-monitoring technique...
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7310363 |
Integrated wavelength tunable single and two-stage all-optical wavelength converter
A semiconductor tunable laser ( 10 ) and an interferometer ( 12 ) coupled to the tunable laser ( 10 ) are monolithically fabricated in a semiconductor heterostructure. The laser also comprises a...
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7295366 |
Optical integrated device and optical module
An optical integrated device includes a plurality of input optical waveguides connected respectively to a plurality of input ports provided on one end face of the optical integrated device, a...
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7280272 |
Bias control of SOA via switches
A semiconductor device, comprising a semiconductor stacking body configured so as to sandwich an active layer by a p-type semiconductor layer and an n-type semiconductor layer and having plural...
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7277222 |
Apparatus and method for wavelength conversion and clock signal extraction using semiconductor optical amplifiers
Provided is an apparatus and method for simultaneous optical wavelength conversion and optical clock signal extraction using semiconductor optical amplifiers (SOAs). The apparatus includes: a...
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7274010 |
Semiconductor optical amplifier device amplifying an externally applied light signal, semiconductor optical amplification driving device and semiconductor light receiving apparatus
A semiconductor optical amplifier device includes an active layer, an n-type InP substrate, an n-type InP clad layer, a p-type InP clad layer, p-electrodes and n-electrodes. The active layer is...
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7265898 |
Semiconductor optical amplifier using laser cavity energy to amplify signal and method of fabrication thereof
A semiconductor optical amplifier (SOA) apparatus and related methods are described. The SOA comprises a signal waveguide for guiding an optical signal along a signal path, and further comprises...
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7248400 |
Embodying equipment and method for an all-optical or logic gate by using single SOA
Disclosed herein is an apparatus and method for implementing an all-optical OR logic gate. The apparatus includes an optical pulse generator, a Mode-Locked Fiber Laser (MLFL), a first optical...
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7236295 |
Broadband light source
A broadband light source is disclosed. The broadband light source includes a semiconductor optical amplifier for generating and amplifying light of a broadband wavelength, the amplifier having a...
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7224519 |
Low noise multi-wavelength light source and wavelength division multiplexing system using same
A multi-wavelength light source includes a substrate, a fabry-perot laser laminated on the substrate that is operated by driving current below a predetermined threshold current to generate...
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