Matches 51 - 100 out of 1125 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >
Match Document Document Title
7336414 Optical modulating device  
An optical modulation apparatus is provided which implements a stable amplifying function by reducing the effect of reflected light rays form end faces of a bidirectional optical amplifier by...
7333262 Optical amplifying method, optical amplifying apparatus, and optical amplified transmission system using the apparatus  
A proportional constant adjusting circuit is arranged in the AGC circuit of the optical amplifying apparatus, and the proportional constant of the proportional circuit is continuously adjusted in...
7330651 Optical amplifying apparatus, optical transmission system and method of adjusting optical transmission loss  
An optical amplifying apparatus connected mutually through an optical transmission line includes an optical detecting unit for detecting an input level of an amplified spontaneous emission (ASE)...
7324268 Optical signal amplifier and method  
An optical amplification apparatus is provided comprising a plurality of fiber amplification media segments which are concatenated in series wherein subsequent to each fiber amplification media...
7319819 Suppression of four-wave mixing in ultra dense WDM optical communication systems through optical fibre dispersion map design  
The invention is the novel use of dispersion compensation in a long haul wavelength division multiplexed high capacity optical transport system which has very many channels packed extremely closely...
7289262 Optical attenuator element, and variable optical equalizer and optical amplifier that use this optical attenuator element  
Instead of using a demultiplexer to divide an optical signal into different wavelengths, this invention uses a plurality of cascade-connected optical attenuator elements whose attenuation factor...
7286288 Method and system for flexible and cost effective dynamic tilt gain equalizer  
Method and system for flattening tilt gain with a digital title gain equalizer (“DTGE”) constructed with a linear tilt optical filter (“LTOF”). In a first embodiment, a DTGE flattens tilt...
7271949 Multi-wavelength light source and wavelength division multiplexing system using the same  
A multi-wavelength light source includes an amplifier for generating light over a wide wavelength range; and, an optical fiber grating including a plurality of gratings formed on an optical fiber...
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...
7262904 Tunable optical add/drop device  
Improved designs of optical devices for processing optical signals with one or more specified wavelengths are disclosed. According to embodiment, a filter mirror assembly appears an “L” shape...
7262903 Method and apparatus for controlling multiple-wavelength-pumped raman amplifier and computer product  
A multiple-wavelength-pumped Raman amplifier includes a control unit that controls, based on a relational expression associating an amount of fluctuation in a current signal light power at a signal...
7256930 High power pulse shaping fiber laser for high data rate free space telecommunication systems  
An amplified laser source for amplifying a laser projection that includes a diode laser source modulated by a pulse generator applying an alternate high and low voltages higher and lower than a...
7254334 Multiplex optical communication system  
A multiplex optical communication system transmitting a multiplex optical signal between terminal equipments each including converters producing optical signals combined to the multiplex optical...
7254291 Optical interferometer  
One embodiment of an optical interferometer includes a first MMI device coupled to a second MMI device via a waveguide. The first MMI device separates a first signal into a guided portion and a...
7253944 Multi-stage raman amplifier  
A Raman amplifier having at least a first and a second optical Raman-active fiber disposed in series with each other is disclosed. A first pump source is connected to the first Raman-active fiber,...
7251071 Transient control in optical transmission systems  
In an optical transmission system, operations of certain elements are adjusted in an individualized manner after detecting a change in the total optical power level corresponding to multiple...
7245423 Reducing noise in a fiber amplifier using a cleaning optical signal  
A fiber amplifier system and method are provided for reducing noise produced by a fiber amplifier by combining an optical signal to be amplified with a continuous wave optical signal that...
7239441 Raman amplification repeater  
A Raman amplification repeater using the amplification function of a signal light caused by Raman scattering which occurs when a pumping light is applied to a transmission path fiber, in which...
7236294 Optical amplifier  
A contrivance, if a WDM signal state changes, is to improve an optical transmission quality by compensating gain flatness. A first excitation control unit sets a first optical pumping light source...
7233432 Pre-emphasized optical communication  
In one of several embodiments, a method of communicating optical signals comprises communicating a plurality of optical signals over an optical communications medium, wherein each of at least some...
7227681 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 amplifier which amplifies a wavelength division multiplexed (WDM) optical signal having a variable number of channels associated with different wavelengths and outputs the amplified WDM...
7224863 All optical regeneration  
All optical regeneration methods and systems can be realized through an exponential amplifier and a limiting amplifier, which could be two independent devices (one piece of fiber with parametric...
7224518 Fiber-optic amplification of light pulses  
A device for amplifying light pulses has an optical stretcher, in which the light pulses of a pulsed laser light source are temporally stretched, and an optically pumped amplifier fiber, in which...
7224517 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...
7224516 Multimode fiber optic amplifier and method of amplifying optical signals  
A multimode fiber receiver includes a multimode collimator, a multimode fiber optic amplifier and a detector. The collimator receives incoming signals and provides the signals to the amplifier. The...
7224515 Optical amplifiers  
A multichannel optical amplifier having an adjustable gain set point is controlled to permit substantially constant gain tilt control during a gain set-point change so that the channel powers are...
7224514 Using gain tilt for local compensation of unwanted power gradients  
A compensator for optical transmission systems exploits gain tilt inherent in optical amplifiers. The amount of SRS induced spectral power gradient is determined, and the amplifier gain is changed...
7224513 Pumping light source having amplification-band extending function for Raman amplification, Raman amplifier using the same, and method and program for setting amplification band extension  
A pumping light source unit for Raman amplification includes at least one pumping light source that outputs a first pumping light covering a current amplification band; at least one additional...
7221827 Tunable dispersion compensator  
An optical dispersion compensator including: a spacer element having a top surface and a bottom surface; a thin film, multi-layer mirror formed on the top surface of the spacer element, the thin...
7221499 Frequency scanned array control system  
An optical fiber amplifier array and related method, in which high beam quality is achieved by varying the frequency of an input signal applied to all of the fiber amplifiers, to locate a frequency...
7218443 Generation of tunable light pulses  
A device for generating tunable light pulses has a non-linear optical fiber. The optical spectrum of femtosecond light pulses can be modified by this optical fiber, taking advantage of solitonic...
7215464 Optical amplifier  
Optical amplifier which can eliminate the need for an optical detection section before an external attenuating medium, can prevent SN degradation, and can reduce power required for pumping light....
7215463 Optical transmission systems including optical amplifiers and methods of use therein  
Optical transmission systems of the present invention include a plurality of optical amplifiers configured to provide optical amplification of one or more information carrying optical signal...
7215462 Filter for selectively processing optical and other signals  
A multi-section filter is provided for use in processing optical signals and other signals that can be readily projected from one filter section to another. Filters of the invention can be...
7212335 Apparatus and method for amplification medium performance simulation, and optical amplifier  
An amplification medium simulation apparatus comprises a basic data retaining unit 21 , an input signal beam information retaining unit 22 , and a simulation executing unit 31 approximating and...
7212334 Optical signal-to-noise ratio improving device  
An optical signal processing method is disclosed that enables improvements of a signal to noise ratio of an optical signal and reduction of size and power of an optical signal processing device....
7209283 Compact optical amplifier with a flattened gain profile  
A flattened gain amplifier has a waveguide with a core doped with at least one species of rare earth ion. The rare earth ion has a gain profile with a first gain in a first wavelength band and a...
7206512 Method of controlling optical wavelength division multiplexing transmission apparatus  
A method of controlling an optical wavelength division multiplexing transmission apparatus achieves stable wavelength division multiplexing optical transmission by switching a control mode of an...
7202996 Optical amplifier  
For setting the optical gain of an optical amplifier such as a Raman amplifier that is connected in a wavelength division multiplexing (WDM) system, the gain of the amplifier is made dependent on...
7199921 Two stage optical amplifier  
The invention describes a system of two-stage optical amplifiers adapted for inserting OADM in the mid-stage, and an integrated assembly designed for implementing the amplifiers in a way suitable...
7199920 Two stage optical amplifier  
The invention describes a two-stage optical amplifier adapted for inserting OADM in the mid-stage, and an integrated assembly designed for implementing the amplifier in a way suitable for forming...
7197206 Optical communication system and method thereof  
The present invention discloses an art for eliminating the dependency of the optical modulator on the polarization degree by using an orthogonal mode light which is a mixture of two lights that are...
7196840 Amplitude balancing for multilevel signal transmission  
Arrangements are provided for an amplitude balanced optical amplifier. A combination of an optical preamplifier and a gain/loss variation modification device (VMD) is employed. The gain/loss VMD...
7194208 Wavelength-division multiplexing optical transmission system and optical communication method  
A wavelength-division multiplexing optical transmission system for providing a compensating-purpose dispersion D 2 to a wavelength-division multiplexing optical signal to be transmitted through an...
7190510 Metro wavelength division multiplexing network  
A metro wavelength division multiplexing network is disclosed and includes a plurality of optical repeaters connected to each other through an optical fiber link, wherein each of the optical...
7174108 Transmission device and repeater  
A transmission system is provided that recognizes occurrence of a fault efficiently so that the workability and quality of service can be improved. An optical amplifier part amplifies an optical...
7173756 Optical amplification system for variable span length WDM optical communication systems  
An optical communications system includes a plurality of optical fiber spans. An optical loss of one of the plurality of optical fiber spans is different from an optical loss of another one of the...
7171068 Method to improve an extinction ratio of an optical device  
A method to improve an extinction ratio of an optical device, the method includes positioning at least a majority of a plurality of micro-mirrors in an off-state position. A mirror assembly...
7170673 Optical amplifying repeater apparatus and optical amplifying/repeating transmission system  
Light signals of first to n-th bands amplified en bloc undergo proper attenuation through an adjustable optical attenuator in conformance with attenuation in an optical fiber connected to input of...
7170672 Raman amplifier  
A Raman amplifier for amplifying WDM radiation propagating along an optical fiber, the WDM radiation comprising a plurality of radiation components each having a selected waveband, comprises a...
Matches 51 - 100 out of 1125 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >