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Optical Communications > Multiplex > Wavelength Division Or Frequency Division (e.g., Raman, Brillouin, Etc.) Wavelength Division Or Frequency Division (e.g., Raman, Brillouin, Etc.)Wavelength Division Or Frequency Division (e.g., Raman, Brillouin, Etc.) patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.10/04/07 - 20070230960 - 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 across the frequency range of interest. Multiple Raman pumps are multiplexed before coupling into the fiber. The Raman amplified optical ... 10/04/07 - 20070230959 - Optical communication device An optical communication device whereby optical attenuation characteristics are linearized to suppress optical level variations among wavelengths attributable to the attenuation characteristics and thereby enable long-distance transmission. Optical attenuators attenuate optical signals of respective wavelengths in accordance with optical attenuation data output from a control data converter. An optical multiplexer ... 09/13/07 - 20070212073 - Apparatus, system and method for optical signal transmission According to the present invention, an apparatus, a system and a method for transmitting a FM batch converted signal and another signal on the same optical fiber can be provided. For example, a first signal such as CATV signal may be FM converted in batch. This converted signal may then ... 08/30/07 - 20070201875 - Wavelength division multiplexing optical transmission apparatus, wavelength division multiplexing optical transmission system and wavelength division multiplexing optical transmission method A wavelength division multiplexing optical transmission apparatus for transmitting wavelength division multiplexing optical signals, the apparatus including a plurality of optical transmitting units outputting optical signals having a different wavelength from each other, a plurality of optical intensity modulating units intensity-modulating the optical signals, and a wavelength multiplexing unit multiplexing ... 07/19/07 - 20070166038 - Wavelength-division multiplexed optical transmission system A wavelength-division multiplexed optical transmission system to keep the correlation of data patterns among wavelength channels to a low level, assuring a stable transmitting quality. The wavelength-division multiplexed optical transmission system has any of a frame phase changing circuit for mutually differing transmitting frame phases between at least two or ... 06/28/07 - 20070147839 - Clock strobed data over one waveguide or fiber In some embodiments, clock strobed data over one waveguide or fiber is presented. In this regard, a transfer agent is introduced to convert one or more lanes of data and a corresponding clock strobe from electrical signals to optical signals of differing wavelengths. Other embodiments are also disclosed and claimed. ... 06/21/07 - 20070140695 - Demodulator A demodulator includes: a Michelson interferometer having: a half-mirror which splits an optical signal, emits a first split light to a first optical path, and emits a second split light to a second optical path; a first reflector which reflects the first split light to the half-mirror; and a second ... 05/24/07 - 20070116468 - Optical tunable asymmetric interleaver and upgrade for dense wavelength division multiplexed networks A tunable asymmetric interleaver constructed from two symmetric interleavers in series, wherein either or both of the individual symmetric interleavers exhibit a wavelength shifting ability. Advantageously, tunable asymmetric interleavers so constructed provide continuous tunable interleaving ratios from 0:100 to 50:50 to 100:0 and provide attractive upgrade paths for existing and ... 04/12/07 - 20070081823 - Wavelength-tunable light source and wavelength-division multiplexed transmission system using the source The present invention relates to a wavelength-tunable light source whose output wavelength can be externally controlled and a wavelength-division multiplexed transmission system using the source. A wavelength-tunable light source in accordance with the present invention is constituted to be able to vary the output wavelength of a Fabry-Perot laser diode, ... 03/29/07 - 20070071443 - Signal multiplexing apparatus and stuff controlling method therein A signal multiplexing apparatus has an OPU/ODU processing unit putting a local protocol signal into an OPU/ODU signal, an ODTU processing unit generating an ODTU signal from the OPU/ODU signal, a read-out position detecting unit detecting a read-out position at the time that the OPU-ODU processing unit reads out the ... 03/01/07 - 20070047960 - Method and apparatus for controlling level of each signal included in wavelength-multiplexed signal A method for an intermediate node to control a level of a signal included in a wavelength-multiplexed signal and transmitted from a source node to a destination node via the intermediate node, includes: detecting a level of the signal; identifying a position of the intermediate node with respect to the ... 02/08/07 - 20070031148 - Method, apparatus and system for optical communications The present invention discloses an optical communication system, a sub-rate multiplexing/de-multiplexing apparatus and the method thereof such that the optical communication system could meet the demand of Metropolitan Area Network (MAN) communications using the existing optical fibre network. This optical communication system includes an optical transmitting module and an optical ... 12/28/06 - 20060291862 - Laser light source device, exposure device, and mask inspection device using this laser light source device A laser light source device 1, comprising M number of laser light sources, of which frequency is shifted from a fundamental frequency by (m−1)·a·Δω, a first laser light source section 2 and a first fiber amplifier section 4 for amplifying these laser lights, a first optical multiplexer 6 for approximately ... 12/21/06 - 20060285848 - Secure analog communication system using time and wavelength scrambling Described are a secure communications system and method for transmitting analog signals. The secure communications system includes an analog multiplexer, an analog demultiplexer, a plurality of analog communications channels each at a different wavelength, and a pair of sequence logic modules. Analog signals applied to the analog multiplexer are scrambled ... 11/23/06 - 20060263090 - Low-cost wdm source with an incoherent light injected fabry-perot laser diode The present invention discloses a low-cost light source for optical transmission systems and optical networks based on wavelength-division multiplexing (WDM) technology. A light source in accordance with the present invention is implemented by externally injecting a narrow-band incoherent light into a Fabry-Perot laser diode (F-P LD). After injection of narrow-band ... 11/23/06 - 20060263089 - Output stage for carrying out wdm message transmission and methods for exchanging full light sources in an output stage of this type An output stage for WDM information transmission transmits a plurality of carrier waves modulated by an information signal and a filling lightwave. A first control circuit controls a desired power signal which determines the power of the filling light source so that the total power of carrier and filling lightwaves ... 11/16/06 - 20060257150 - Laser light source, method of laser oscillation, and method of laser processing A laser light source includes a light source section for outputting pulse laser light λ1, λ2 with a mutually identical repetition frequency, an optical amplification section for amplifying and outputting the pulse laser light λ1, λ2 output from the above light source section by means of a common optical amplification ... 11/09/06 - 20060251422 - Power and energy scaling of fiber lasers by using compact divisional wavelength multiplexing (wdm) devices A fiber laser system includes a plurality of input ports for projecting a plurality of incident lasers each having a different wavelength to a wavelength divisional multiplexing (WDM) device for multiplexing a scaled portion for each of the incident lasers into a multiplexed and scaled output laser with a scaled ... 10/19/06 - 20060233550 - Wavelength division multiplexed light source and passive optical network using the same A wavelength division multiplexed light source for a passive optical network using the same includes broadband light sources arranged at a desired interval on a wavelength axis, so as to output wavelength bands each having a plurality of structural wavelengths. Further included is a main coarse wavelength division multiplexer (M-CWDM) ... 10/05/06 - 20060222366 - Optical transmission apparatus An optical transmission apparatus includes a demultiplexing unit that demultiplexes a light input to the optical transmission apparatus into a plurality of lights; an optical attenuator that adjusts an output level of a light within a band that includes a signal light from among demultiplexed lights; a bypass unit that ... 09/28/06 - 20060216028 - Wavelength division multiplexing transmission system, wavelength division multiplexing transmission apparatus and method for controlling wavelength division multiplexing transmission apparatus A wavelength division multiplexing transmission system that comprises an input/output terminal station for an optical signal, and an intermediate station located between the terminal stations and connected by an optical transmission line for performing wavelength division multiplexing and transmission of the optical signal, wherein the signal transmission system comprising the ... 09/28/06 - 20060216027 - Wavelength division multiplexing transmission apparatus using a multiple wavelength light source One of two optical fibers connecting communication stations is used for transmitting multiple wavelength light supplied from a multiple wavelength light source supply apparatus, and the other for a bidirectional communication using optical signals of respective wavelengths generated from the multiple wavelength light. Alternatively, a transmission of multiple wavelength light ... 09/28/06 - 20060216026 - Wavelength division multiplexing transmission device In an optical transmission device, when wavelength division multiplexed light formed from signals of a plurality of wavelengths are received, an optical signal of one wavelength comprised in this wavelength division multiplexed light is planarized and non-signal light of the same wavelength is reproduced. The reproduced light is modulated with ... 09/21/06 - 20060210272 - Optical transmission apparatus and optical transmission control method for wavelength-division-multiplexed optical signal An optical transmission apparatus for amplifying and relaying a wavelength-division-multiplexed optical signal includes (1) a variation-detecting unit which detects varying speed of input power of the wavelength-division-multiplexed optical signal and compares the varying speed with a set value, (2) an optical amplifying unit which amplifies the wavelength-division-multiplexed optical signal at ... 08/03/06 - 20060171716 - Multi-channel all-optical signal processor An all-optical processor and method for simultaneous 2R regeneration of the multiple wavelength-division-multiplexed (WDM) channels comprising: a nonlinear medium, wherein the nonlinear medium comprises one or more highly-nonlinear fiber (HNLF) sections adapted to receive multiple WDM channels from the input, and wherein further the HNLF sections are separated by one ... 07/27/06 - 20060165414 - Method for optimizing enhanced dwdm networks An enhanced Dense Wave Division Multiplexing (DWDM) network is optimized through bundling subchannel traffic in DWDM channels at network nodes and “hubbing” the DWDM channels at nodes receiving a relatively higher volume of aggregate traffic than other nodes. The optimization can eliminate low rate links and supporting network equipment. The ... 06/29/06 - 20060140631 - Shared multi-lambda source for wdm pon Shared optical carrier sources for the OLT's are provided. An apparatus comprises a plurality of optical carrier generators, each optical carrier generator outputting an optical carrier at a different wavelength, an optical multiplexer operable to combine the plurality of optical carriers to form a wave division multiplexed optical carrier, and ... 05/18/06 - 20060104640 - Wavelength division multiplexing apparatus A transponder in a wavelength division multiplexing apparatus detects a wavelength of a leak light (received light) having one of plural wavelengths multiplexed or divided by a WDM unit, the leak light having been received from the WDM unit when the transponder is connected to the WDM unit; determines a ... 05/18/06 - 20060104639 - D(wdm) communications network employing periodic spectral multiplex processing A WDM network (R) comprises an optical fiber (F) connected to a hub (H) via an input of a demultiplexer (DX) having N outputs to communications stations (Si-Sn) able to deliver and/or receive spectral multiplexes of modulated optical signals with different wavelengths, via coupling means (CP, CP′, MXB). The communications ... 04/27/06 - 20060088319 - Thermally-floating transmitter wavelength grid of signal channels in a wdm transmission system A method and apparatus is provided for tracking a thermally floating wavelength signal channel grid generated at an optical transmitter (Tx) in an optical transmission system or optical network where the wavelengths of the individual Tx signal channels may move in wavelength due to, for example, changes in ambient temperature ... 03/30/06 - 20060067693 - Optical transmission system and optical transmission method After implementing a scrambler upon an electric signal of digital signals to be transmitted to a user terminal, this electric signal is converted into a digital optical signal, and an analog optical signal and this digital optical signal are multiplexed by wavelength division multiplexing, thereby reducing influence of cross-talk interference ... 03/16/06 - 20060056849 - Long-distance synchronous transmission method using optical fibre A process for transmitting data on an optical fiber including multiplexing in wavelength signals coming from a plurality of monochrome transmitters, each of which has its own wavelength, and modulating information to be transmitted by a carrier realized per channel, wherein timing (clocking) of each transmitter is controlled by a ... 03/09/06 - 20060051093 - System and method for spectral loading an optical transmission system A system and method for spectral loading unutilized channels of a partially loaded WDM system may be used to suppress spectral hole burning (SHB). Dummy tones may be loaded at different loading wavelengths within the band of system wavelengths such that the loading wavelengths are associated with a subset of ... 03/09/06 - 20060051092 - In-band wavelength conversion wavelength buffering and multi-protocol lambda switching A method and device for wavelength conversion, wavelength buffering and label/header swapping. A wavelength buffer is used to provide for in-band wavelength conversion in, for example, a dense wavelength division multiplexing communications system. The same device may be used for label/header swapping without wavelength conversion. ... 03/02/06 - 20060045527 - Multiplexing communication system and crosstalk elimination method In a system where a quantum channel and a classical channel are multiplexed on a single optical transmission line and information is transmitted from a transmitter to a receiver through the quantum channel, the classical channel is inhibited from affecting the quantum channel. To this end, the transmission characteristics of ... 02/23/06 - 20060039702 - Automatic shutdown system and method for optical multiplexers and demultiplexers An automatic shutdown system for optical multiplexers and demultiplexers includes an optical switch that is disposed in a common optical channel between a transmitter and a receiver of an optical communication system. The optical switch may attenuate or block a signal in the common optical channel during power-off conditions. The ... 02/09/06 - 20060029394 - Optical multiplexing interconnect module In an optical multiplexing interconnection module, first and second NRZ input signals synchronous by clock signal are inputted to its input section. The first NRZ input signal is converted to a first RZ signal according to a logical product with a clock signal CLK by a drive circuit and the ... 02/02/06 - 20060024058 - Wdm optical transmission equipment with redundant configuration, and wavelength control method of light output in standby system WDM optical transmission equipment with redundant configuration includes a plurality of transmitters. Each transmitter includes active and standby panels including active and standby optical transmission circuits respectively having active and standby attenuators for controlling an attenuation amount of each output of the active and standby optical transmission circuits; and a ... 01/26/06 - 20060018659 - Optical transmission equipment preventing mulfunction in recovery from fault An optical transmission apparatus includes a demultiplexer for separating wavelength-division multiplexing light received from a first optical transmission line into signals of different wavelengths to transmit the signals to an outside and a multiplexer for multiplexing signals of different wavelengths received from the outside to transmit multiplexed signals to a ... 01/26/06 - 20060018658 - Wavelength division multiplexing optical transmission system A WDM optical transmission system of the invention has a configuration where WDM light generated at a wavelength multiplexing station is transmitted via a plurality of stations such as optical add-drop stations, arranged on an optical transmission line, and control of the power of the optical signals of respective wavelengths ... 12/29/05 - 20050286895 - Wavelength-division-multiplexing passive optical network utilizing fiber fault detetors and/or wavelength tracking components Various methods, systems, and apparatuses is described in which a passive-opticalnetwork includes a first multiplexer/demultiplexer, a second multiplexer/demultiplexer, a wavelength tracking component, and a transmission wavelength controller. The first multiplexer/demultiplexer is located in a first location. The second multiplexer/demultiplexer is located in a second location remote from the first location. ... 12/15/05 - 20050276605 - Method of upgrading an optical transmission network, an optical transmission network, and associated optical transmission nodes The invention relates to methods of upgrading optical transmission networks, upgradeable optical transmission networks, and upgradeable optical transmission nodes. The node of the invention is an upgradeable optical transmission node comprising a plurality of optical fiber transmission lines, a plurality of optical splitters (2) each having one input optical fiber ... 11/24/05 - 20050259989 - Multiple-wavelength pulsed light source for a wavelength division multiplexed passive optical network Various methods and apparatuses are described for a multiple wavelength light source. The multiple wavelength light source may be located in a central office to supply a first broad band of wavelengths for a one or more passive optical networks. The multiple wavelength light source generates a series of four ... 11/17/05 - 20050254819 - Optical in-line amplifier and wavelength-division multiplexer An optical in-line amplifier and a wavelength-division multiplexer suitable for a fiber-optic network that performs bi-directional transmission over a single optical fiber while using different wavelengths for each direction. By performing wavelength routing using three port devices, optical signals for each direction are separated and extracted. Subsequently, the signals are ... 10/13/05 - 20050226618 - Network transceiver for extending the bandwidth of optical fiber-based network infrastructure A multimode wavelength division multiplexing (WDM) network transceiver and method includes a plurality of optical transmitters and a multiplexer operatively connected to each optical transmitter for receiving optical communications signals and multiplexing the signals into a multimode wavelength division multiplexed optical communications signal. A demultiplexer receives a multimode wavelength division ... 10/13/05 - 20050226617 - Digital image transmitter A digital image transmitter is disclosed herein. The digital image transmitter includes: a sender for transforming a plurality of channels of electrical signals output from a computer to a single channel of optical signal and sending the single channel of optical signal; an optical cable provided with a single optical ... 10/13/05 - 20050226616 - Method to demultiplex wavelengths of light An apparatus and method for demultiplexing multiple wavelengths of light. In one embodiment, an optical signal having a plurality of wavelengths is provided to an optical-to-electrical (OE) circuit configured to convert optical signals into electrical signals. The optical signal may include a plurality of wavelengths. The OE circuit converts the ... 09/29/05 - 20050213979 - Wavelength division multiplexing optical transmission system and transmission wavelength control method therefor In the wavelength division multiplexing optical transmission system according to the present invention, when setting the transmission wavelengths of the wavelength-variable optical transmitter in case of addition or expansion of the optical transmitter, each transmission wavelength is set automatically so as to match with each port wavelength of the input ... 09/29/05 - 20050213978 - Wavelength demultiplexing unit In a WDM transmission system, a wavelength selecting switch demultiplexes a first WDM light containing a plurality of wavelength components into a plurality of single wavelength lights each containing corresponding one of the wavelength components, effects multiplexing on the plurality of single wavelength lights to form a second WDM light, ... 09/29/05 - 20050213977 - Split-band optical transmission system and optical transmission method used therein An optical transmission system including an optical transmitting device (2) and an optical receiving device (3). The optical transmitting device (2) includes: a data signal splitting section (11, 12) for splitting information included in the data signal into at least two pieces of information and generating at least two electrical ... 09/01/05 - 20050191056 - Wdm systems and methods A WDM optical system includes first and second WDM's including an optical link therebetween. Each WDM includes circuitry for linking multiplexer and demultiplexer circuitry to a plurality of modular elements. The modular elements include a first set of modules for converting between native protocol media signals and common format signals. ... 08/11/05 - 20050175345 - Wavelength multiplexing device and optical transmission module provided with the same A wavelength multiplexing device has an emitter capable of independently emitting at least two optical signals for at least two kinds of wavelength, respectively and a transmitter including a plurality of optical waveguides into which the optical signals emitted by the emitter are coupled and which independently transmit the coupled ... 08/11/05 - 20050175344 - System and apparatus for a carrier class wdm pon accommodating multiple services or protocols A Passive Optical Network (PON) is provided with capability for multiple protocols and service suppliers by employing Wavelength Division Multiplexer (WDM) elements in combination with optical couplers at optical distribution nodes (ODN) intermediate a local exchange office and a customer node. The local exchange office node transmitting and receiving signals ... 07/21/05 - 20050158050 - Fiber-to-the-premise architectures An optical architecture is provided comprising a plurality of mod/mux units, a master optical distribution hub, a plurality of additional optical distribution hubs, and a plurality of premise stations. Each of the mod/mux units is configured to (i) permit selective modulation of demultiplexed components of a target wavelength band of ... 06/16/05 - 20050129402 - Wdm-pon system with optical wavelength alignment function A PLC-based wavelength-tunable WDM-PON system with an optical wavelength alignment function, the WDM-PON system comprises: a PLC platform formed on a silicon substrate; a semiconductor chip comprising an active region generating light and a passive region located in front of the active region for vertically coupling the light generated in ... 06/09/05 - 20050123299 - Wavelength division multiplexing optical transmission system A wavelength division multiplexing optical transmission system for multiplexing a plurality of optical signals of the wavelength different from each other. The system comprises a first converter converting the plurality of optical signals whose wavelengths are different from each other, into a plurality of electric signals, a generator generating check ... 06/02/05 - 20050117906 - Reconfigurable optical device for controlled insertion/dropping of optical resources An optical multiplexer device (D) is dedicated to inserting/dropping optical resources into or from an optical transmission line comprising incoming and outgoing optical fibers (F1, F2). The device (D) comprises: i) first coupler means (C1) having an inlet and an outlet connected respectively to the incoming optical fiber (F1) and ... 06/02/05 - 20050117905 - Optical transponder which can be reconfigured in accordance with various types of client networks An optical transponder which can be reconfigured in accordance with various types of client networks is provided. A client network interface transceiver includes a connector comprising a first connection terminal providing a unit transmitting and receiving a plurality of first clock signals, a plurality of second clock signals, and a ... 06/02/05 - 20050117904 - Integrated optical transmitter, receiver for free space optical communication and network system and application apparatus thereof The present invention relates to the optical transmitter, receiver and application apparatus thereof for OWLL (Optical WireLess Link) which transmits and receives the optical signals through the free space and FSON (Free Space Optical Network) system using OWLL. Photonic devices such as laser diode and photo detector and integrated circuits ... ### FreshPatents.com Support - Terms & Conditions |