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8179932 |
Pulse laser apparatus, terahertz measuring apparatus, and terahertz tomographic apparatus
A pulse laser apparatus includes a laser configured to generate a pulse of a laser beam, a fiber amplifier, and a pulse compressor. The fiber amplifier includes a rare-earth doped fiber that...
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8174758 |
Optical amplifier
An optical amplifier for amplifying light includes a light source for emitting pump light in accordance with current amount; a rare earth element doped optical fiber doped rare earth element, the...
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8174757 |
Wavelength determining apparatus, method and program for thin film thickness monitoring light
A multi-layer optical thin film filter comprising plural deposited optical thin films, wherein optical thin film thickness for each of said optical thin films has a predetermined wavelength...
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8164826 |
Multi-stage optical amplifier and method of controlling the same
The present invention provides a multi-stage optical amplifier including a high SN ratio and a method of controlling the same. A multi-stage optical amplifier is configured such that the gain of an...
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8130802 |
Tunable laser
A tunable laser includes an optical gain medium, a first resonator, a periodically tunable optical filter, and a second resonator in which light of a laser wavelength exhibits a round trip time T....
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8111454 |
Optical communication using shared optical pumps
Cross-distribution of the output pump power from optical pump units amongst multiple amplifier gain stages even in a single direction of an optical link in an optical communications system. For...
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8107819 |
Systems and methods for interference prediction
An optical network device of a passive optical network is introduced. The optical network device includes a light source, a control unit, and a variable optical attenuator. The light source can...
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8107160 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Light output control apparatus
A light output control apparatus, includes: an excitation light source that outputs excitation light;an excitation light guiding unit that guides the excitation light to an optical amplifying...
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8102595 |
Optical transmission system with optical amplifier gain setup based on difference between signal loss and noise light loss
In an optical transmission system, a controller acquires a noise light loss value, which indicates a loss that noise light output from an upstream-side optical amplifier undergoes during...
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8102407 |
Method and device for manipulating color in a display
Embodiments include methods and devices for controlling the spectral profile and color gamut of light produced by an interferometric display. Such devices include illuminating a display with...
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8094369 |
Regulatable optical amplifier, and method for regulating an optical amplifier
The invention relates to a regulatable optical amplifier which has at least two series-connected amplifier groups, each amplifier group having a regulating device. Connected upstream of the optical...
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8090259 |
System and method for optimizing the selection of ghost channels in mitigating polarization hole burning
A system and method for optimizing the selection of ghost channels to mitigate the effects of polarization hole burning in a node of an optical communication system including identifying an optical...
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8081376 |
Multi-stage fiber amplifier to suppress Raman scattered light
The invention relates to a light source apparatus having a structure for effectively suppressing a negative effect due to a nonlinear effect generated in propagation of an amplifying light, and...
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8077383 |
Optical amplifier
An optical amplifier including: a first amplifying unit amplifying an input light by utilizing a first excitation light and thereby outputting a first amplified light; a second amplifying unit...
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8077382 |
Gain-clamped optical amplifying apparatus using fiber Raman amplifier having Raman cavity
Provided is a gain-clamped (GC) optical amplifier using a fiber Raman amplifier (FRA) having a Raman cavity. The FRA having a Raman cavity comprises a Raman fiber module (RFM) amplifying and...
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8068275 |
Method for measuring nonlinear optical properties
In an optical amplifier, an input light is supplied to one end of an optical fiber connected to an output port, and the power of a light in an opposite direction which is input to the output port...
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8068735 |
Transient control solution for optical networks
An optically amplified wavelength division multiplexing network has the functionality to add/drop channels at the optical add/drop multiplexing (OADM) nodes. The OADM node includes a receiver...
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8064130 |
Optical amplifier
It is an object of the present invention to provide an optical amplifier using optical amplification mediums each doped with a rare earth element for increasing amplification efficiency of signal...
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8054539 |
Optical system for reducing stimulated Brillouin scattering by controllably changing polarization direction of an optical signal
An optical system having an input surface configured to receive an input optical signal having a polarization, and a polarization changer comprising the input surface and configured to generate two...
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8049956 |
Apparatus for spectrum-doubled optical parametric chirped pulse amplification (OPCPA) using third-order dispersion chirping
The present invention relates to an OPCPA apparatus. The OPCPA of the present invention includes an optical pulse stretcher (100) for outputting chirped laser light using odd-order dispersion...
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8045260 |
Optimized signal control in frequency-doubled laser sources
The present disclosure relates generally to semiconductor lasers and laser projection systems. According to one embodiment of the present disclosure, a method of operating a laser projection system...
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8045259 |
Active optical fibers with wavelength-selective filtering mechanism, method of production and their use
The invention relates to optical fibers for use in optical amplification of light, such as in optical fiber amplifiers and lasers and for use in delivery of high power light, in particular to a...
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8036538 |
Method and optical amplifier for laser safety protection and method for loading identification signal
A method for laser safety protection in an optical communication system includes: a downstream station detecting whether an identification signal loaded by an upstream station on a main optical...
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8031396 |
Modular, high energy, widely-tunable ultrafast fiber source
A modular, compact and widely tunable laser system for the efficient generation of high peak and high average power ultrashort pulses. System compactness is ensured by employing efficient fiber...
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8009984 |
Method and apparatus for measuring optical power of very weak light, and optical communication system using the same
A method and apparatus for measuring the optical power of very weak light arriving at a receiver, by using a photon detector, are provided. A photon detector detects the presence or absence of the...
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8004752 |
Multi-wavelength light amplifier
A multi-wavelength light amplifier includes a first-stage light amplifier which has a first light amplifying optical fiber amplifying a light input, a second stage light amplifier which has a...
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8004753 |
Optical amplifier, fiber laser, and method of eliminating reflected light
A MO-PA type optical amplifier is provided which includes an oscillator and an amplifier including a fiber for optical amplification, including: a reflected-light wavelength conversion fiber which...
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8000001 |
Method of forming polymeric microarray support
The invention comprises a polymeric microarray support (1) for an optical assay arrangement (2) comprising optical means (3, 4, 6) for detection of light emitted from the support. The microarray...
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7999999 |
Article comprising a multichannel optical amplified transmission system with functional upgrade capabilities and universal modules
A universal inline functional module for operation with nonzero average gain G≠0dB over a bandwidth is provided. The module includes at least one optical functional element producing loss over t...
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7995921 |
Banded semiconductor optical amplifiers and waveblockers
Embodiments of the present invention provide an array of semiconductor optical amplifiers, within a photonic integrated circuit (hereinafter, “PIC”), that apply a gain to one or more optical ban...
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7995270 |
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...
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7990608 |
Optical transmission system
An optical amplifier reducing gain deviation caused by wavelength arrangement has a first-stage optical amplifying unit, an attenuator, a second-stage optical amplifying unit, an automatic gain...
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7982945 |
Optical amplification module and laser light source designed to suppress photodarkening
The present invention relates to an optical amplification module having a construction which effectively suppresses photodarkening, and to a laser light source including the same. The laser light...
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7969649 |
Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied
An optical amplifying apparatus which includes an optical amplifier, an optical attenuator and a controller. The optical amplifier amplifies a light signal having a variable number of channels. The...
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7969648 |
Gain and signal level adjustments of cascaded optical amplifiers
An optical amplification device which includes first and second optical amplifiers, and a controller. The first optical amplifier receives a light and amplifies the received light. The second...
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7969647 |
Apparatus and method for flattening gain profile of an optical amplifier
A change in loading conditions of fiber amplifiers in an optical communications network causes rapid variations in the gain profile of the amplifiers due to spectral hole burning and stimulated...
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7953130 |
Pulse laser apparatus, terahertz measuring apparatus, and terahertz tomographic apparatus
A pulse laser apparatus includes a laser configured to generate a pulse of a laser beam, a fiber amplifier, and a pulse compressor. The fiber amplifier includes a rare-earth doped fiber that...
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7949030 |
High-power, phased-locked, laser arrays
High-power, phased-locked, laser arrays as disclosed herein utilize a system of optical elements that may be external to the laser oscillator array. Such an external optical system may achieve...
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7944613 |
Optical module having three or more optically transparent layers
A light dispersion filter is composed of three or more optically transparent layers each having a value equal to the value of the product of the refractive index and thickness of the optically...
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7940452 |
Method for acquiring spectrum shape of a gain flattening filter in an optical amplifier
A method for acquiring spectrum shape of a gain flattening filter of a doped optical fiber amplifier comprises the steps of: measuring spectrum shapes at two gain point (H, L) of the doped optical...
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7929201 |
Multistage optical amplifier with gain control using pump ratio
According to an aspect of the embodiment of the invention, an optical amplifier including an input port, an output port, a plurality of amplifying parts, an optical attenuator, a gain controller...
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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.,...
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7924497 |
System and method for gain equalization and optical communication system incorporating the same
An optical amplifier including gain equalization and system incorporating the same. The amplifier includes a Raman portion and an EDFA portion with a gain flattening filter coupled between the...
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7924499 |
Gain and signal level adjustments of cascaded optical amplifiers
An optical amplification device which includes first and second optical amplifiers, and a controller. The first optical amplifier receives a light and amplifies the received light. The second...
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7916385 |
Apparatus and methods for optical communication
An optical circuit is disclosed, which may include a semiconductor optical amplifier (SOA); an optical filter operable to filter light emerging from the SOA; and a PIN for converting the light...
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7911684 |
Variable gain erbium doped fiber amplifier
Systems, methods, and apparatuses are provided for variable gain optical fiber amplifiers. In one implementation, a variable gain optical amplifier is provided. The amplifier includes a first...
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7903696 |
High-power narrowed-linewidth fiber laser system
A high-power narrow-linewidth fiber laser system includes a seed oscillator with multiple resonant cavities and an amplifier stage. The seed oscillator includes a gain fiber, a pump source to...
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7899331 |
WDM optical transmission system and optical amplifying apparatus
According to a WDM optical transmission system of the present invention, wavelength numbers information of a WDM signal light output from an upstream side optical amplifying unit to a transmission...
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7894501 |
Laser device and optical amplifier
Laser light emission across a wide bandwidth emission spectrum is enabled in a laser device equipped with solid gain media. The laser device is equipped with: a resonator; a plurality of solid gain...
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7894129 |
Laser device and optical amplifier
Laser light emission across a wide bandwidth emission spectrum is enabled in a laser amplifier equipped with solid gain media. The laser amplifier is equipped with: a resonator; a plurality of...
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