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US20110013267 Fiber-Adaptive Distributed Raman Amplifier Pump Setup Scheme  
Techniques, in the form of an apparatus, logic and a method, are provided to set power levels for multiple Raman pump wavelengths in a distributed Raman amplification configuration in order to...
US20110157687 SYSTEM AND METHOD OF RAMAN AMPLIFIER PUMP CONTROL  
An example method includes receiving power measurements for a plurality of optical channels. Deviation measurements representing a difference between respective power measurements and...
US20140268308 TILT CONTROL THROUGH OPTICAL PUMP POWER ADJUSTMENT  
The adjustment of tilt in an optical signal path of a repeater. The repeater includes an optical pump that optically powers a rare-Earth doped fiber amplifier, which amplifies the optical signal....
US20130027698 SELF-ARRANGING, LUMINESCENCE-ENHANCEMENT DEVICE FOR SURFACE-ENHANCED LUMINESCENCE  
A self-arranging, luminescence-enhancement device 101 for surface-enhanced luminescence. The self-arranging, luminescence-enhancement device 101 for surface-enhanced luminescence includes a...
US20140146385 RAMAN AMPLIFIER  
Raman amplifier includes: a pump-light generator configured to supply pump light to a transmission fiber; a measurement circuit configured to measure a relationship between power of the pump light...
US20150049379 OPTICAL AMPLIFIER FOR MULTI-CORE OPTICAL FIBER  
An optical device comprising a first optical coupler located over a surface of a substrate such that the optical coupler is able to end-couple to an optical core of a first optical fiber having an...
US20150188287 ADAPTIVE NETWORK OPTIMIZATION IN AN OPTICAL COMMUNICATIONS SYSTEM  
An optical amplifier with network optimization techniques maximizes performance of a conventional optical amplifier with minimum user intervention. A circulator enables as much light as possible...
US20140104679 RAMAN AMPLIFIER GAIN COMPRESSION SYSTEMS AND METHODS BASED ON SIGNAL POWER MONITORING  
Raman amplifier gain compression systems and methods based on signal power monitoring are described which estimate distributed Raman amplifier saturation based on a total power measurement at an...
US20140022626 HYBRID OPTICAL AMPLIFIER WITH OPTIMIZED NOISE FIGURE  
Methods for optimizing a noise figure of a variable gain hybrid amplifier (HA) which includes a variable gain Raman amplifier with adjustable average gain GR and gain tilt TR and a variable gain...
US20090245786 OPTICAL COMMUNICATION SYSTEM, METHOD OF MEASURING OPTICAL TRANSMISSION LINE IN THE OPTICAL COMMUNICATION SYSTEM, TRANSMITTING STATION, AND RECEIVING STATION  
According to halt of a Raman pumping light source, a transmitting light power of a first light which is subject to receive a Raman gain is controlled to increase. In this state, a first...
US20100073762 Raman amplifier and control method thereof  
A Raman amplifier, at the time of start up or the like, drives a predetermined number of pump light sources among a plurality of pump light sources, in a stable region, and judges a Raman gain in...
US20140198376 OPTICAL SENSING CHIP  
The present invention relates to an optical sensing chip, which has various applications and may be used repetitively. The optical sensing chip can qualitatively identify different types of...
US20090153950 Phase Stabilization Device For Stimulated Brillouin Scattering Phase Conjugate Mirrors And Light Amplification Apparatus Using The Same  
The object of this invention is to provide a phase stabilization device for stimulated brillouin scattering-phase conjugate mirrors and a light amplification apparatus using the phase...
US20150085350 Multi-Wavelength Distributed Raman Amplification Set-Up  
Techniques are presented herein to set power levels for multiple Raman pump wavelengths in a distributed Raman amplification configuration. A first receive power measurement is obtained at a...
US20110279888 MULTICORE TRANSMISSION AND AMPLIFIER FIBERS AND SCHEMES FOR LAUNCHING PUMP LIGHT TO AMPLIFIER CORES  
An optical transmission and amplification system includes a multichannel transmission span with a length of a multicore transmission fiber having a plurality of individual transmission cores. A...
US20100209117 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...
US20140016127 OPTICAL ELECTRICAL FIELD ENHANCING DEVICE AND MEASURING APPARATUS EQUIPPED WITH THE DEVICE  
An optical electrical field enhancing device includes: a transparent substrate having a structure of fine protrusions and recesses on the surface thereof; and a metal structure layer of fine...
US20110255151 Optical Network Amplifier Node and Method of Channel Power Depletion Compensation  
A method of compensating for channel power depletion induced by Raman amplification noise in a hybrid distributed Raman amplifier-Erbium doped fibre amplifier. In the method, an equivalent noise...
US20090263069 RAMAN AMPLIFICATION IN DISTRIBUTED OPTICAL FIBER SENSING SYSTEMS  
A method of providing Raman amplification in an optical fiber sensing system, comprises generating a probe pulse of light and launching the pulse into a sensing optical fiber, generating pump...
US20100296818 COST EFFECTIVE OPTICAL TRANSMISSION WITH FAST RAMAN TILT TRANSIENT CONTROL  
A method for cost-effective optical transmission with fast Raman tilt or other transient event control uses a combination of Erbium-doped fiber amplifiers (EDFAs) and Raman fiber amplifiers...
US20080180787 High power optical apparatus employing large-mode-area, multimode, gain-producing optical fibers  
Optical apparatus includes a multimode, gain-producing fiber for providing gain to signal light propagating in the core of the fiber, and a pump source for providing pump light that is absorbed in...
US20120013975 OPTICAL AMPLIFIER AND TRANSMISSION LOSS MEASUREMENT METHOD  
An optical amplifier that amplifies signal light with Raman amplification in the Raman amplification medium. The optical amplifier includes a light source that supplies pump light into the Raman...
US20150194787 OPTIC FIBER AMPLIFIER HAVING A HIGH BRILLOUIN THRESHOLD AND METHOD FOR MAKING SUCH AN AMPLIFIER  
According to one aspect, the invention relates to an optic fiber amplifier having a high Brillouin threshold, and including: an amplification optic fiber (16) comprising a core and a sheath and...
US20140300951 DIRECTLY DRIVEN SOURCE OF MULTI-GIGAHERTZ, SUB-PICOSECOND OPTICAL PULSES  
A robust, compact optical pulse train source is described, with the capability of generating sub-picosecond micro-pulse sequences, which can be periodic as well as non-periodic, and at repetition...
US20070273961 Light Pulse Amplification In Long Optical Fibers  
A method is disclosed for amplifying a light pulse (S) in an optical fiber (1), wherein a Raman pump signal (RPS) having a lower wavelength than the light pulse (S) is transmitted at a selected...
US20100183305 OPTICAL COMMUNICATION USING COUPLED OPTICALLY PUMPED AMPLIFIERS  
Coupling of optically pumped amplifiers between two nodes of an optical communications system. Optical pump power from one direction of the bi-direction communication is diverted to power...
US20080297883 Raman Amplifier Structure  
A Raman amplifier structure (121, 221) for optically amplifying an input optical signal comprises an optical means (22) through which the optical signal is propagated, a first pump optical source...
US20060033983 Optical fiber for raman amplification  
Raman amplifier having an optical fiber made of a tellurite glass is disclosed. The tellurite glass has at least two further metal oxides, the metals of said respective two oxides being selected...
US20090213454 RAMAN AMPLIFICATION APPARATUS AND DISTRIBUTED RAMAN AMPLIFICATION SYSTEM AS WELL AS STARTING UP METHOD FOR DISTRIBUTED RAMAN AMPLIFICATION SYSTEM  
A Raman amplification apparatus includes a pumping light supplying section, a main signal wavelength light level acquisition section, a monitoring signal wavelength light level acquisition...
US20050200945 Optical fiber communication systems with brillouin effect amplification  
An optical fiber transmission system comprising a transmitter and a receiver at the two ends of an optical fiber. The transmitter comprises a signal laser for generation of a transmission signal...
US20140043674 OPTICAL AMPLIFIER, OPTICAL AMPLIFYING SYSTEM, WAVELENGTH CONVERTER, OPTICAL AMPLIFICATION METHOD, AND OPTICAL COMMUNICATION SYSTEM  
An optical amplifier includes an optical gain fiber into which signal light and pump light are input and at least one relative phase shifter is inserted. Preferably, the relative phase shifter is...
US20090195862 DISTRIBUTED RAMAN AMPLIFYING SYSTEM, START-UP METHOD THEREOF, AND OPTICAL DEVICE  
To obtain automatic gain control with high accuracy by including first and second light monitors, a reference light supplying unit supplying reference light of which wavelength is set within a...
US20090323173 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...
US20080192333 Dynamic raman tilt compensation  
Raman tilt is induced by the propagation of optical signals in optical communication fibers during and after transient events. Certain characteristics of the light are monitored at each...
US20110141553 RAMAN AMPLIFIER, OPTICAL REPEATER, AND RAMAN AMPLIFICATION METHOD  
A Raman amplifier according to the present invention comprises a plurality of pumping means using semiconductor lasers of Fabry-Perot, DFB, or DBR type or MOPAs, and pumping lights outputted from...
US20080158657 RAMAN AMPLIFIER AND EXCITATION LIGHT SOURCE USED THEREOF  
A Raman amplifier provided with a pump source outputting a pumping light; a rare-earth doped fiber inputting the pumping light and outputting an excitation light; and a guiding unit guiding the...
US20080123180 RAMAN AMPLIFIER  
When pump light is supplied to a transmission line fiber from a downstream station toward an upstream station and signal light from the upstream station is Raman-amplified, a corresponding...
US20060171019 Fiber optical system with Raman tilt control  
A fiber optical system (1) for transmitting an optical signal comprises an optical fiber line (2) with a plurality of optical fiber spans (3) interconnected by a plurality of optical amplifiers...
US20050259315 Cascaded raman pump for raman amplification in optical systems  
A pumping module having a cascaded Raman laser for Raman amplified optical transmission systems. Non-linear parametric phenomena, such as Raman-assisted three-wave mixing, in Raman amplified...
US20100079853 OPTIMIZED CASCADED RAMAN FIBER-BASED LASER SOURCE FOR HIGH EFFICIENCY MID-INFRARED SPECTRAL GENERATION  
A laser structure is provided that includes a pulsed source producing a pulsed signal having a low spontaneous noise component to its spectral output and a pulse-shape that is optimally flat....
US20110038035 NARROW BAND FIBER RAMAN OPTICAL AMPLIFIER  
Optical Raman fiber amplifier (20), with an amplification fiber, wherein at least one section thereof has a ratio of Raman gain coefficient gR to Brillouin gB gain coefficient of gR/gB larger than...
US20070030558 Raman-amplified optical transmission system and method for amplifying optical signals  
A Raman-amplified optical transmission system (1) comprises at least one transmission fiber (4) for Raman amplifying of an optical signal (S), at least one corresponding pump (5, 5.1, 5.2, 5.3)...
US20090091819 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...
US20130286467 MULTISCALE LIGHT AMPLIFICATION STRUCTURES FOR SURFACE ENHANCED RAMAN SPECTROSCOPY  
A method, system and article of manufacture for amplification of light for surface enhanced Raman spectroscopy. The method and system include a source of input light, a grating with grooves...
US20140285874 METHOD FOR CONTROLLING SIGNAL GAIN OF A RAMAN AMPLIFIER  
A Raman amplifier comprising a gain control unit adapted to control a pump power of an optical pump signal in response to at least one monitored optical feedback signal reflected back from a...
US20130242379 METHOD FOR CONTROLLING SIGNAL GAIN OF A RAMAN AMPLIFIER  
A Raman amplifier comprising a gain control unit adapted to control a pump power of an optical pump signal in response to at least one monitored optical feedback signal reflected back from a...
US20110292497 APPARATUS AND METHOD FOR CONTROLLING 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...
US20070115536 RAMAN AMPLIFIER AND OPTICAL TRANSMISSION SYSTEM  
A Raman amplifier for a use in optical transmission systems. The Raman amplifier comprises a Raman active optical fiber and a Raman pump in operative connection with said optical fiber. The Raman...
US20130286468 RAMAN AMPLIFIER, OPTICAL REPEATER, AND RAMAN AMPLIFICATION METHOD  
A Raman amplifier using semiconductor lasers of Fabry-Perot, DFB, or DBR type or MOPAs, to output pumping lights having different central wavelengths, an interval between adjacent central...
US20100284060 Systems and Methods for Cascaded Raman Lasing at High Power Levels  
In a light amplification system, a fiber-based oscillator, amplifier, and cascaded Raman resonator are coupled together in series. The oscillator output is provided as an input into the amplifier,...
Matches 1 - 50 out of 144 1 2 3 >