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Class Information
Number: 398/68
Name: Optical communications > Multiplex > Broadcast and distribution system > Wdm
Description: Subject matter wherein a multichannel wavelength division multiplexed signal is broadcast or distributed to a group of subscribers in which a receiver selects each channel through demultiplexing.

Sub-classes under this class:

Class Number Class Name Patents
398/73 Bus 35
398/70 Hub or central office 273
398/69 With variable frequency channel assignment 163

Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8705911 Bus-based scalable optical fabrics Apr. 22, 2014
8705964 Method and system for data synchronization in passive optical networks Apr. 22, 2014
8693871 System for routing and wavelength assignment in wavelength division multiplexing optical networks Apr. 8, 2014
8687976 Optical access network having emitter-free customer premise equipment and adaptive communication scheduling Apr. 1, 2014
8670667 Access multiplexers and methods for multiplexing telecommunication signals using an arrayed media converter Mar. 11, 2014
8665749 Method and apparatus for realizing source routing in a blocking cross network Mar. 4, 2014
8660428 Variable channel spacing in a coherent transmission system Feb. 25, 2014
8649682 Passive optical network Feb. 11, 2014
8644714 Multi-wavelength optical source generator Feb. 4, 2014
8634719 Systems and methods for enabling different network nodes of a network access system to share a backhaul communications link Jan. 21, 2014
8634716 Data transmission network Jan. 21, 2014
8631151 Techniques for guaranteeing bandwidth with aggregate traffic Jan. 14, 2014
8630541 Wavelength division multiplexing transmission apparatus for controlling the wavelength of an FBTL optical module, and wavelength control method employed for wavelength division multiplexing tr Jan. 14, 2014
8625991 Amortization of expensive optical components Jan. 7, 2014
8606100 WDM-TDM PON remote terminal and WDM-TDM PON link protection system Dec. 10, 2013
8606109 Technique for forwarding packets in a gigabit passive optical network (GPON) Dec. 10, 2013
8594506 Method and system for propagating upstream cable modem signals and RF return video control signals over the same optical network Nov. 26, 2013
8588612 Optical detection device in WDM-PON and method for same Nov. 19, 2013
8582968 Method, apparatus and system for advertising routing protocol message and calculating route Nov. 12, 2013
8571420 Apparatus and method for driving wavelength-independent light source Oct. 29, 2013
8571410 Mutual wavelength locking in WDM-PONS Oct. 29, 2013
8571422 Burst transmission method, and receiver resetting method and apparatus in a passive optical network Oct. 29, 2013
8565600 Optical network configurations with multiple band multiplexing and de-multiplexing and AWG structures with multiple band processing Oct. 22, 2013
8565599 System and method for transmitting optical markers in a passive optical network system Oct. 22, 2013
8553725 Super-channel assignment using a flexible grid Oct. 8, 2013
8554078 Passive optical network with plural optical line terminals Oct. 8, 2013
8554080 Failsafe optical splitter and method to isolate faults in a passive optical network Oct. 8, 2013
8548329 Apparatus and method for relaying in gigabit passive optical network Oct. 1, 2013
8543957 Optical network design apparatus and method Sep. 24, 2013
8542999 Minimizing bandwidth narrowing penalties in a wavelength selective switch optical network Sep. 24, 2013
8532491 Optical multiplexing terminating device, passive optical network system and method for allocating wavelength Sep. 10, 2013
8519803 Resonator systems and methods for tuning resonator systems Aug. 27, 2013
8521025 Scheduling WDM PON with tunable lasers with different tuning times Aug. 27, 2013
8515281 Node segmentation Aug. 20, 2013
8509619 Communication control method, station side device, subscriber side device, and communication system Aug. 13, 2013
8494366 Wavelength division multiplexing-passive optical network using external seed light source Jul. 23, 2013
8488966 Data transmission method of optical access network, and system and device thereof Jul. 16, 2013
8483562 Method and apparatus for integrating automated switching in a passive optical network Jul. 9, 2013
8478124 Optical IMA architecture Jul. 2, 2013
8467686 Combined optical and coaxial hub for routing an upstream signal from a two-way digital output to an existing hybrid fiber coax network Jun. 18, 2013
8457488 Technology for providing telecommunication services to multiple optical communication lines Jun. 4, 2013
8457490 Use of subcarrier deactivation in a multi-subcarrier channel to improve reach in an optical network Jun. 4, 2013
8447182 Multi-wavelength transponder with wavelength division multiplexing modules May. 21, 2013
8437637 Methods and systems for multicast control May. 7, 2013
8437636 Methods of transmitting and receiving multicast or broadcast frame in OLT and ONU for WDM-PON, WDM-PON system, and OLT for WDM-PON May. 7, 2013
8428460 Wavelength division multiplexing passive optical network having multiple branches of optical distribution Apr. 23, 2013
8428461 Apparatus for managing an optical signal Apr. 23, 2013
8417117 DWDM and CWDM hybrid PON system and method Apr. 9, 2013
8406631 Network timing Mar. 26, 2013
8406629 Architecture to communicate with standard hybrid fiber coaxial RF signals over a passive optical network (HFC PON) Mar. 26, 2013

1 2 3 4 5 6 7

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