Class 359/339 - Using saturable or spatial filter

Subclass of Class 359 - Optical: systems and elements
Definition: Subject matter wherein the correction is accomplished by
No. of patents: 31
Last issue date: 03/25/2008

Number	Title	Issue Date
7349089	High transmission multi-wavelength filter and method An optical arrangement and method of filtering include a beam splitter that accepts an incident beam and transmits light from the incident beam of a first polarization and reflects light from the incident beam of a second polarization. The transmitted light is a fir...	03/25/2008
7260331	Optical pulse demultiplexer and method thereof To demultiplex a low-speed optical pulse signal from a high-speed optical pulse signal, an optical clock generator generates an optical clock of a control wavelength λp at a predetermined frequency out of a pulse signal light of a signal wavelength λs. On one side...	08/21/2007
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 first end and a second end and a mirror spaced from the second end of t...	06/26/2007
7139299	De-tuned distributed feedback laser diode A semiconductor laser that includes a feedback laser section and an amplifier section. The feedback laser section generates a laser beam that has a maximum intensity at a first wavelength. The amplifier section amplifies the laser beam into a high powered beam. The ...	11/21/2006
6980345	High speed optical signal processor including saturable absorber and gain-clamped optical amplifier Disclosed is a high speed optical signal processor which includes a saturable absorber area including a substrate, an active layer, a clad layer and a first upper electrode which are sequentially formed on one face of the substrate, and a first lower electrode forme...	12/27/2005
6822591	Logic element employing saturable absorber The present invention relates to all-optical OR and XOR logic elements employing saturable absorbers as optical gates. Saturable absorbers are arranged in paths of the Mach-Zehnder interferometer, respectively. If the total power of an input optical signal and a con...	11/23/2004
6611640	Optical dispersion compensator An optical dispersion compensator includes a saturable absorber. Coupled to the saturable absorber is a pre-amplifier and a post-amplifier. The saturable absorber compresses optical pulse signals based upon the amplitude envelope of the optical pulse in o...	08/26/2003
6504637	Optical regeneration circuit for regenerating signal with deteriorated signal to noise ratio by means of saturable absorption element An optical transmission system having an optical regeneration circuit for regenerating a signal with a deteriorated signal to noise ratio. A signal light at wavelength λ1 which includes a noise light is composed with a continuous light at wavelength λ2 ...	01/07/2003
6222669	Optical partial regeneration of solitons A partial optical regenerator for use in high bit-rate optical systems and useful in WDM applications employing soliton transmission. The regenerator essentially comprises a saturable optical element in a main optical path and a resonant optical circuit c...	04/24/2001
6124959	Optical wavelength-division multiplexing transmission system An optical wavelength-division multiplexing transmission system includes an optical wavelength-division multiplexing transmitter, an optical wavelength-division multiplexing receiver, and a plurality of optical amplifiers disposed on an optical transmissi...	09/26/2000
6124966	Optical functional amplifying method and optical functional amplifying device An optical functional amplifying device suitable for use in an optical gate which operates at a very high repetition frequency such as a frequency exceeding 100 GHz. The device has a semiconductor laser amplifier having a gain section and a saturable abso...	09/26/2000
6091743	Bandwidth broadened and power enhanced low coherence fiberoptic light source An optical light source signal generator comprising an optical amplification medium for generating amplified spontaneous emission (ASE), having forward and backward light propagating ports for outputting output and backward optical light respectively, a r...	07/18/2000
5917635	Optical repeaters for single-and multi-wavelength operation with dispersion equalization An optical repeater is described which integrates an erbium doped optical fiber amplifier (EDFA) with a dispersion equalizer (DE) based on fiber gratings. The dispersion equalizer is based on parallel connection of two fiber gratings for single carrier wa...	06/29/1999
5903375	Surveillance method of optical communication line To enable the surveillance of a long-distance optical fiber line that a method using the reflection lights and Rayleigh backscatter lights cannot cover, a plurality of optical reflection elements P1-Pn are interposed in the optical fiber line at each spec...	05/11/1999
5808788	Optical fiber amplifier An optical fiber amplifier includes an optical filter, an optical isolator for blocking a reverse flow of a reflected light, the optical isolator including a lens coated with an integral filter having a predetermined bandwidth and an output end tab for mo...	09/15/1998
5594586	Photorefractive limiting quadratic processor Limiting quadratic processing and compansion in photorefractive two beam coupling is disclosed. Two-beam coupling in photorefractive barium titanate employs the imaged intensity of the signal to amplify the reference beam while maintaining the phase of th...	01/14/1997
5309530	Technique utilizing stress-induced birefringence for reducing polarization dependent hole-burning in an amplified optical transmission system A technique for reducing signal degradation and fading within a long optical transmission system by minimizing polarization dependent hole-burning ("PDHB") through the cyclic stressing of a birefringent optical fiber to modulate the SOP of an optical sign...	05/03/1994
5309535	Apparatus and method utilizing a rotating waveplate for reducing polarization dependent hole-burning in an amplified optical transmission system A technique for reducing signal degradation and fading within a long optical transmission by utilizing a rotating waveplate arrangement to rotate the SOP of an optical signal launched into the transmission system, and thereby minimize polarization depende...	05/03/1994
5184247	Optically stabilized feedback amplifier An arrangement for operation as an optical feedback amplifier which is composed of a DFB laser whose grating selects a wavelength that differs by so much from the wavelength at which the amplification medium has a maximum gain that a constant amplificatio...	02/02/1993
5177634	High gain limiting erbium-doped fiber amplifier with wide dynamic range An optical limiting amplifier is disclosed having a high gain over a wide dynamic range of input power levels. The amplifier has an input stage (102) and an output stage (103), each of which includes an erbium-doped fiber amplifier (104, 106). The erbium-...	01/05/1993
5175643	Monolithic integrated master oscillator power amplifier A monolithic integrated master oscillator power amplifier is provided comprising means for generating and emitting a laser beam and means for amplifying the laser beam. The amplifying means is in communication with the generating and emitting means, and t...	12/29/1992
5155621	Optical fiber amplifier An optical fiber amplifier in which light generated within an Er doped optical fiber by spontaneous emission is eliminated or suppressed. By inserting a wavelength demultiplexer in the Er doped optical fiber, the light generated within the optical fiber b...	10/13/1992
5132835	Continuous-time optical neural network process An all-optical, continuous-time, recurrent neural network is disclosed which is capable of executing a broad class of energy-minimizing neural net algorithms. The network is a resonator which contains a saturable, two-beam amplifier; two volume holograms;...	07/21/1992
4979234	Saturated semiconductor laser amplifier for compensation of optical fibre dispersion The span of an optical dispersion-limited fiber for propagating optical pulses is improved by simultaneously chirping and amplifying the stream by means of a saturated semiconductor laser amplifier. The chirp causes a compression of the pulses as they pro...	12/18/1990
4807237	Method and apparatus for operating a dye laser with a proton transfer reaction In a laser oscillator or laser amplifier, a so-called switching dye is used which strongly reduces the degree of amplification for the laser radiation after a short time interval, by means of transient absorption. Molecules or molecule systems in which a ...	02/21/1989
4790627	Incoherent laser system for producing smooth and controllable spatial illumination profiles A technique called echelon-free ISI produces smooth, controllable target beam profiles with large KrF fusion lasers. The technique projects the desired time-averaged spatial profile F(r) onto the target via a laser system, using partially coherent broadba...	12/13/1988
4774473	Limited diffraction feedback laser system having a cavity turbulence monitor A low diffraction-feedback high-energy laser system includes an injection laser, and a master power amplifier (MOPA). The master oscillator power amplifier preferably includes a convex and a concave cavity reflector. A sensor mounted to the convex reflect...	09/27/1988
4551684	Noise reduction in laser amplifiers Amplified spontaneous emission is substantially reduced in a novel optical amplifier wherein the gain medium is disposed within a converging region of the coherent signal, which converging region terminates in a waist at or near a limiting stop or saturab...	11/05/1985
4158176	Spatial filter system as an optical relay line A system consisting of a set of spatial filters that are used to optically relay a laser beam from one position to a downstream position with minimal nonlinear phase distortion and beam intensity variation. The use of the device will result in a reduction...	06/12/1979
4143332	Wave-length selective cut-out device The cut-out device comprises a saturable absorbing medium and a monochromatic filter disposed between two amplifying media in the path of laser light pulses. The cut-out device forestalls amplification of light spontaneously emitting in one amplification ...	03/06/1979
3942133	Gas laser tube with stray light restriction Light that is initiated in a laser device includes a diffusion of scattered and reflected light around the laser beam. This diffusion of light occurs because light in the optical cavity of the laser is reflected from the surfaces of the bore and becomes m...	03/02/1976

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Class 359/339 - Using saturable or spatial filter