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Class Information
Number: 398/7
Name: Optical communications > Fault recovery > Wdm
Description: Subject matter wherein the faulty optical communication system includes a wavelength division multiplexed system.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8705952 Optical wavelength division multiplex (WDM) transmission system Apr. 22, 2014
8693864 Optical network system, optical redundant switching apparatus, and WDM apparatus Apr. 8, 2014
8606099 Method and system for protecting integrated optoelectronic devices Dec. 10, 2013
8600229 Method and system for shared protection in wavelength division multiplexing loop network Dec. 3, 2013
8554070 Optical transmission apparatus and optical attenuation amount control method Oct. 8, 2013
8467676 Sparing for multi-wavelength optical transmitter Jun. 18, 2013
8463120 Method, system and node device for realizing service protection in automatically switched optical network Jun. 11, 2013
8457490 Use of subcarrier deactivation in a multi-subcarrier channel to improve reach in an optical network Jun. 4, 2013
8428456 Passive optical network protection method, switchover control device, and passive optical network protection system Apr. 23, 2013
8412038 Optical transmission device, optical transmission system including the same, and optical transmission method Apr. 2, 2013
8401382 Passive optical network protection method, switchover control device, and passive optical network protection system Mar. 19, 2013
8320757 Method and device for starting up an optical transmission link Nov. 27, 2012
8305881 Method and system for maximizing wavelength reuse in optically protected WDM networks Nov. 6, 2012
8306422 WDM PON protection scheme using a dual port arrayed waveguide grating (AWG) Nov. 6, 2012
8229258 Optical waveguide-type wavelength domain switch Jul. 24, 2012
8200084 Encoding for information needed for routing and wavelength assignment in wavelength switched optical networks Jun. 12, 2012
8139936 Method and apparatus of routing convergence in control plane of an intelligent optical network Mar. 20, 2012
8126330 Dynamic wavelength service over a ROADM optical network Feb. 28, 2012
8121474 Standby broadband light source for passive optical networks Feb. 21, 2012
8103162 Channel protection for multi-channel optical transmission system and method Jan. 24, 2012
8045851 Method and apparatus for automatic restoration detection and automatic restoration of optical communication system Oct. 25, 2011
8041210 Parallel high-speed communication links with redundant channel architectures Oct. 18, 2011
8036526 Method and apparatus for restoration of optical ring network operating conditions after a fault is repaired Oct. 11, 2011
8019228 Optical switching transmission system with timing correction Sep. 13, 2011
8019217 Storage system and optical module switching method for storage system Sep. 13, 2011
8000606 Method for processing overheads of optical communication system and signal processing device Aug. 16, 2011
7995920 Optical network terminal power failure management Aug. 9, 2011
7957270 Resilient packet ring protection over a wavelength division multiplexing network Jun. 7, 2011
7848642 Method and apparatus for capacity-efficient restoration in an optical communication system Dec. 7, 2010
7848643 Communication recovering system for wavelength division multiplexed passive optical network Dec. 7, 2010
7844177 Optical signal changeover device and optical signal changeover method Nov. 30, 2010
7839766 Method and system for long haul optical transport for applications sensitive to data flow interruption Nov. 23, 2010
7831144 Fast fault notifications of an optical network Nov. 9, 2010
7769296 Arrangement for reducing multiplexing and demultiplexing cost in ultra long haul (ULH) all-optical networks by minimizing number of required mux/demux groups Aug. 3, 2010
7764881 Optical apparatus and optical cross connect apparatus Jul. 27, 2010
7751711 Optical network terminal power failure management Jul. 6, 2010
7747164 Wavelength division multiplexing transmission system, wavelength division multiplexing transmission apparatus and method for controlling wavelength division multiplexing transmission apparatus Jun. 29, 2010
7729613 Apparatus for optical path monitoring and an optical shutter for preventing signal transimission in a faulty optical path Jun. 1, 2010
7672592 Optical transmitter system Mar. 2, 2010
7664391 Method and system for shared optical regeneration Feb. 16, 2010
7660526 Through channel loss prevention at a WDM node Feb. 9, 2010
7643751 Network managing apparatus, optical add/drop multiplexer, and network managing method Jan. 5, 2010
7634160 Passive optical network system based on a wavelength protection and protecting backup method thereof Dec. 15, 2009
7634194 Multi-channel protection switching systems and methods for increased reliability and reduced cost Dec. 15, 2009
7634196 Optical add/drop multiplexer with reconfigurable add wavelength selective switch Dec. 15, 2009
7630296 System and method for remotely restoring inoperative data communications Dec. 8, 2009
7627243 Methods and apparatuses for handling multiple failures in an optical network Dec. 1, 2009
7580633 Method and device for data-flow protection of optical interface in data communication equipment Aug. 25, 2009
7574133 Virtual protection channel for fiber optic ring network Aug. 11, 2009
7558477 Communication recovering system for wavelength division multiplexed passive optical network Jul. 7, 2009

1 2 3

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