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Class Information
Number: 398/79
Name: Optical communications > Multiplex > Wavelength division or frequency division (e.g., raman, brillouin, etc.)
Description: Subject matter wherein 1) two or more optical information signals simultaneously present on a common optical waveguide are differentiated by optical wavelength or 2) the frequency spectrum of an optical transmission medium is divided into segments and respective information channels are transmitted in different segments.

Sub-classes under this class:

Class Number Class Name Patents
398/82 By optical coupling 715
398/91 Different sources 341
398/81 Dispersion compensation 529
398/90 Electrically controlled single source 49
398/93 Including feedback 86
398/89 Multiple access (e.g., wdma) 52
398/97 Repeater 167
398/80 Soliton 35
398/96 Through free space 48

Patents under this class:

Patent Number Title Of Patent Date Issued
8705972 Energy-efficient and fault-tolerant resonator-based modulation and wavelength division multiplexing systems Apr. 22, 2014
8705971 Three-way handshake (3WHS) optical network signaling protocol Apr. 22, 2014
8705970 Method for data processing in an optical network, optical network component and communication system Apr. 22, 2014
8705952 Optical wavelength division multiplex (WDM) transmission system Apr. 22, 2014
8705904 Photonic integrated circuits having chirped elements Apr. 22, 2014
8693874 Transmission system and method of correcting tilt of the transmission system Apr. 8, 2014
8693873 Apparatus and method for improved distributed compensation of filtering effects mitigation in an optical network Apr. 8, 2014
8693872 Wavelength adjusting method, apparatus, and system Apr. 8, 2014
8693871 System for routing and wavelength assignment in wavelength division multiplexing optical networks Apr. 8, 2014
8693870 Control apparatus, polarization multiplexing light modulator, light transmitting apparatus, and method of controlling polarization multiplexing light modulator Apr. 8, 2014
8687983 Laser communication system Apr. 1, 2014
8687975 Integrated circuit with optical interconnect Apr. 1, 2014
8682164 Optical wavelength division node Mar. 25, 2014
8665749 Method and apparatus for realizing source routing in a blocking cross network Mar. 4, 2014
8660429 Wavelength division multiplexing module Feb. 25, 2014
8655190 Wavelength division multiplexed optical communication system architectures Feb. 18, 2014
8655176 System and methods for converting a temporally short and spectrally broad optical pulse into a train of spectrally narrow optical pulses Feb. 18, 2014
8655174 Wavelength division multiplexer compatible with two types of passive optical networks Feb. 18, 2014
8655165 Light transmission device, optical relay device, optical wavelength multiplexing transmission apparatus, and light transmission method Feb. 18, 2014
8649682 Passive optical network Feb. 11, 2014
8644714 Multi-wavelength optical source generator Feb. 4, 2014
8644708 Coupled seed light injection for wavelength division multiplexing passive optical networks Feb. 4, 2014
8643696 Synchronizing media streams using time signal(s) from an independent time source Feb. 4, 2014
8639119 Remote node for wavelength-division-multiplexed passive optical network Jan. 28, 2014
8639118 Wavelength division multiplexed optical communication system having variable channel spacings and different modulation formats Jan. 28, 2014
8639113 Network protection switching Jan. 28, 2014
8634724 Power manageable optical OFDM transponder Jan. 21, 2014
8634723 Optical communications with polarization dependent loss compensation Jan. 21, 2014
8625994 Directionless reconfigurable optical add-drop multiplexer systems and methods Jan. 7, 2014
8625993 Wavelength-switched optical add-drop multiplexer with wavelength broadcasting capability Jan. 7, 2014
8625991 Amortization of expensive optical components Jan. 7, 2014
8620160 Optical transmission apparatus Dec. 31, 2013
8619807 High-capacity packet-switched ring network Dec. 31, 2013
8611748 WDM optical transmission system and wavelength dispersion compensation method Dec. 17, 2013
8611747 Method and system for multiplexing optical communication signals Dec. 17, 2013
8611746 Optical transmission between a central terminal and a plurality of client terminals via an optical network Dec. 17, 2013
8606104 Wavelength selective switch Dec. 10, 2013
8606100 WDM-TDM PON remote terminal and WDM-TDM PON link protection system Dec. 10, 2013
8600239 Precise clock synchronization over optical fiber Dec. 3, 2013
8600238 Method and system for bi-directional communication over a single optical fiber Dec. 3, 2013
8600237 Broadband radio transceiver with optical transform Dec. 3, 2013
8600236 Optical communication module for optical wavelength division multiplexing Dec. 3, 2013
8594504 Optimised multiplexer/demultiplexer optical structure Nov. 26, 2013
8594503 Method and system for multiplexer waveguide coupling Nov. 26, 2013
8582975 Wavelength division multiplexed passive optical network Nov. 12, 2013
8571410 Mutual wavelength locking in WDM-PONS Oct. 29, 2013
8571058 Terminal apparatus, data transmission system and data transmission method Oct. 29, 2013
8565610 Maintaining correlated virtual data streams through a network Oct. 22, 2013
8559821 Wavelength stabilization and locking for colorless dense wavelength division multiplexing transmitters Oct. 15, 2013
8559820 Optical communication system, optical transmitter, optical receiver and methods, and correlators used therefor Oct. 15, 2013

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