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| Number | Title | Issue Date |
| 8150262 | Optical communications network and intensity adjustment method for optical communications network An optical communications network in which one optical line terminal is connected to multiple optical network units and in which code division multiplexing communication is carried out between the optical line terminal and the optical network units. The optical inte... | 04/03/2012 |
| 8150263 | Optical code division multiplex signal generator An optical code division multiplexing signal generator provided with an optical pulse light source, a first encoder to an Nth encoder, a first optical modulator to an Nth optical modulator, and a first optical circulator to an Nth op... | 04/03/2012 |
| 7983561 | Optical pulse time spreading device An optical pulse time spreading device includes S optical pulse time spreading elements that spread input optical pulses into trains of (N×j) chip pulses, where j is an integer greater than zero, S is an integer greater than one, and N is an integer equal to or gre... | 07/19/2011 |
| 7903973 | Dynamic temporal duration optical transmission privacy Systems and methods are presented herein to achieve data privacy in the optical realm such that electronic encryption bottlenecks are removed, potentially increasing data transmission speeds to the limit of fiber optic media. In this regard, privatizing an optical d... | 03/08/2011 |
| 7792427 | Optical code division multiple access data storage and retrieval An OCDMA system is disclosed that provides for storage and retrieval of OCDMA data while maintaining OCDMA encoding and signaling information. The system includes a wavelength demultiplexer that optically receives an OCDMA signal having a plurality of wavelengths of... | 09/07/2010 |
| 7778547 | Code grouping for optical networks The invention is directed to code labeling in an optical network. The network includes a transmitting station operable to transmit an optical signal. The network also includes an encoder coupled to the transmitting station operable to label the optical signal compos... | 08/17/2010 |
| 7773881 | Optical division multiplexing transmission and reception method and optical division multiplexing transmission and reception device An OCDM signal generation section generates an encoded optical pulse signal by encoded an optical pulse signal. The encoded optical pulse signal is then inputted to a wavelength disperser and the time waveform of the encoded optical pulse signal is shaped to be outp... | 08/10/2010 |
| 7747170 | Optical code division multiplexing transmission/reception method and optical code division multiplexing transmission/reception device A transmission unit comprises an optical pulse train generation unit, first channel encoded optical pulse signal generation unit, second channel encoded optical pulse signal generation unit, third channel encoded optical pulse signal generation unit, and fourth chan... | 06/29/2010 |
| 7729616 | Phase chip frequency-bins optical code division multiple access Apparatus and system for transmitting and receiving optical code division multiple access data over an optical network. The apparatus comprises a spectral phase decoder for decoding the encoded optical signal to produce a decoded signal, a time gate for temporally e... | 06/01/2010 |
| 7680415 | Optical code division multiplexing transmission and reception method and optical code division multiplexing transceiver An object of the present invention is to provide an OCDM transceiver with which the reduction amount of the intensity of the correlation waveform signal is smaller than that of a conventional device of the same type in the decoding step that comprises a time gate pr... | 03/16/2010 |
| 7646980 | Variable spectral phase encoder/decoder based on decomposition of Hadamard codes The invention is directed toward a variable spectral phase encoder. The variable spectral phase encoder includes a plurality of switches and at least one encoder. The encoder is coupled between a first switch and second switch among the plurality of switches. The fi... | 01/12/2010 |
| 7630642 | Ranging method for communication system between optical line terminal and plurality of optical network units In 1 to N communication based on code division multiplexing, ranging is performed by following the first to ninth steps. First step: all the optical network units are set to standby status. Second step: first and second optical network units are set to transmission ... | 12/08/2009 |
| 7630641 | Optical network monitoring One method embodiment for monitoring an optical pathway includes emitting an optical signal from an optical emitter, encoding the optical signal with a monitoring optical code division multiple access (OCDMA) code, directing the optical signal with the monitoring OC... | 12/08/2009 |
| 7620324 | Optical division multiplexing transmission and reception method and optical division multiplexing transmission and reception device An object of the present invention is to implement optical multiplexing transmission and reception in which an OCDM channel is added without changing the used wavelength bandwidth of the existing WDM channel or without changing the time slot allocated to the existin... | 11/17/2009 |
| 7555216 | Optical communication system using optical frequency code, optical transmission device and optical reception device thereof, and reflection type optical communication device The invention dispenses with calibration of the optical frequency of the light source and permits the use of many codes without increasing the transmission bandwidth used. Let the optical frequency width of the light source be represented by FSR and the code length ... | 06/30/2009 |
| 7512342 | Digital encoding of labels for optical packet networks Methods and apparatuses are provided for transmitting labels in an optical packet network. Groups of K payload bits are encoded into blocks of N bits by using a code in which each of the groups of K payload bits is represented by a corresponding one of at least two ... | 03/31/2009 |
| 7433603 | Using active and passive optical components for an optical network In one embodiment, the present invention includes a network hub having an active optical encoder where the network hub is to generate a plurality of addressed optical data signals, each having a common carrier wavelength and a different address corresponding to a ne... | 10/07/2008 |
| 7421202 | Photonic label switching architecture A photonic label switching architecture. The architecture includes a photonic label extractor to split an externally input first optical packet data into a photonic label and a payload. Then, the photonic label is input to a photonic label processing and swapping de... | 09/02/2008 |
| 7421204 | Method and system for increasing the spectral efficiency of binary coded digital signals A method and system for increasing the spectral efficiency of binary coded signals includes encoding an input binary bit sequence such that the input binary bit sequence is converted into a series of rectangular pulses having varying repetition rates. A continuous w... | 09/02/2008 |
| 7421203 | Method for transmitting packet in wireless access network based on wavelength identification code scheme A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the “n” is a positive integer, and a... | 09/02/2008 |
| 7418205 | Method and apparatus for controlling a frequency hopping laser An optical spread spectrum communication system includes a tunable laser which sequentially outputs optical signals having different wavelengths. The laser produces a frequency spectrum having a plurality of closely spaced modes relative to optical frequencies. The ... | 08/26/2008 |
| 7403713 | Quantum source coding apparatus and quantum information communication system Quantum source coding apparatus for communication of quantum information comprising: a quantum state preparation device for converting input messages into block messages; a coding device for producing coded signals by compressing the block messages prepared by the q... | 07/22/2008 |
| 7389055 | DQPSK receiver phase control An optical receiver for receiving an optical differential phase shift keyed signal has an optical component sensitive to the optical phase of the signal, such as an interferometer, a device arranged to generate a control signal by non linear limiting of an output of... | 06/17/2008 |
| 7386236 | Multiple wavelength TDMA optical network A passive optical network which employs multiple wavelengths to increase overall system bandwidth, with each wavelength being shared by multiple optical network units (ONUs) according to a time division multiple access (TDMA) protocol. The upstream TDMA traffic ther... | 06/10/2008 |
| 7369771 | Optical network terminator and optical network connection method using it An optical network terminator of the present invention includes an optical wavelength division multiplexer for receiving an optical signal and incoherent light. An optical detection unit converts a downstream high speed and low speed optical signals into electrical ... | 05/06/2008 |
| 7369765 | Optical network with selective mode switching A method for communicating optical traffic in a network comprising a plurality of network nodes includes receiving traffic to be added to the network at a network node. The network is operable to communicate received traffic in an optical signal comprising one or mo... | 05/06/2008 |
| 7356220 | Apparatus and method for reducing signal noise and OCDMA receiver and method Provided are an apparatus and a method for reducing a signal noise of an OCDMA receiver and an OCDMA receiver and method. The includes: a clock recovery unit extracting sine wave clock from an output signal of an OCDMA decoder including an MAI (multiple access inter... | 04/08/2008 |
| 7340183 | Optical communications systems, devices, and methods A method of transmitting an optical communications signal, comprising receiving a first signal, encoding the signal with a differential or duobinary encoding scheme, encoding the signal with an oscillating signal component, and sub-carrier modulating the signal onto... | 03/04/2008 |
| 7333737 | Optical receiver There is provided an optical receiver in which a time gate can be realized with a simple, low-cost configuration, and which has few aspects that require adjustment. The optical receiver of the present invention comprises a decoding circuit in which optical signals w... | 02/19/2008 |
| 7330656 | Passive optical network employing code division multiple access A PON and a method of transmitting data employing different upstream and downstream transmission protocols are disclosed. The PON includes: a plurality of ONTs; WDM filters; an OLT receiving and transmitting optical signals to and from the ONTs and a higher network;... | 02/12/2008 |
| 7330657 | 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 o... | 02/12/2008 |
| 7324755 | Optical code-division multiple access transmission system and method An optical code division multiple access transmission and reception system is presented. The transmission system comprises an optical comb generator for producing multiple discrete optical signal components comprising a plurality of equally spaced wavelength compone... | 01/29/2008 |
| 7324753 | Optical communication network using a code division multiplexing method The present invention is a high-speed and low-cost optical communication network. A preferred embodiment of this optical communication network comprises an accommodation device, optical couplers that are connected to corresponding ports of this accommodation device,... | 01/29/2008 |
| 7324754 | Optical code division multiplex transmission method and optical code division multiplex transmission device An object of the present invention is to adjust the operating wavelength of a decoder, in order to coordinate the operating characteristics of an encoder and the decoder. To this end, an optical code division multiplex transmission device of the present invention co... | 01/29/2008 |
| 7315664 | Method of identifying and labeling optical conduits A method for labeling or coding optical conduits is disclosed. The method includes providing an optical conduit, and utilizing reflected light resulting from the transmission of at least one light pulse along the optical conduit to generate a multi-digit code. Still... | 01/01/2008 |
| 7315699 | Optical device for extracting a sideband signal from a composite signal including orthogonally modulated signals An optical device extracts an information bearing sideband such as an FSK or SCM signal (label) from a composite signal that includes the sideband and an orthogonally modulated signal such as an intensity modulated signal (payload) by splicing the composite signal i... | 01/01/2008 |
| 7310465 | Optical pulse time spreading device The present invention is an SSFBG with which there are few restrictions on the code that can be set and the overall length of which is short. This SSFBG has four unit FBGs the Bragg reflection wavelengths of which are λ1, λ2, λ3, ... | 12/18/2007 |
| 7308199 | Optical CDMA transmitting apparatus and method for transmitting bipolar data Provided is an optical Code Division Multiple Access (CDMA) transmitting apparatus and method for transmitting bipolar data in an optical CDMA system. The optical CDMA transmitting apparatus and method of the present research has a simple structure, including only o... | 12/11/2007 |
| 7302192 | Methods of spread-pulse modulation and nonlinear time domain equalization for fiber optic communication channels Methods, apparatus, and systems for an optical communication channel. A data signal is preconditioned prior to transmission over a fiber optic cable to minimize signal distortion and transmitted over a fiber optic cable. Preconditioning may include none, one or more... | 11/27/2007 |
| 7286761 | Method of flexible multiple broadcast service delivery over a WDM passive optical network based on RF Block-conversion of RF service bands within wavelength bands A system and method for simultaneous delivery of a plurality of independent blocks of 500 MHz digital broadcast television services, stacking a plurality of RF blocks on a plurality of spectrally sliced WDM optical bands. The method for delivering a plurality of vid... | 10/23/2007 |
