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Class Information
Number: 398/83
Name: Optical communications > Multiplex > Wavelength division or frequency division (e.g., raman, brillouin, etc.) > By optical coupling > Add or drop
Description: Subject matter wherein desired wavelengths are inserted or extracted at a desired location.










Sub-classes under this class:

Class Number Class Name Patents
398/85 Filter 310
398/84 Grating 263


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12

Patent Number Title Of Patent Date Issued
8712238 Optical switching device and communications system Apr. 29, 2014
8705958 Optical packet switching apparatus, optical packet switching system, and optical packet in-line amplifier apparatus Apr. 22, 2014
8705978 Method of efficiently and safely adding and deleting channels in an amplified wavelength division multiplexing system Apr. 22, 2014
8693869 Optical transport apparatus and optical transport system Apr. 8, 2014
8693873 Apparatus and method for improved distributed compensation of filtering effects mitigation in an optical network Apr. 8, 2014
8693880 Wavelength path communication node apparatus, wavelength path communication control method, and recording medium Apr. 8, 2014
8682167 Optical transmission device Mar. 25, 2014
8676057 Optical transmission device, operational wavelength number restricting method, and program Mar. 18, 2014
8670669 Directionless reconfigurable optical add and drop mesh node Mar. 11, 2014
8670670 Optical ring network architecture Mar. 11, 2014
8666252 Optical network system Mar. 4, 2014
8660429 Wavelength division multiplexing module Feb. 25, 2014
8649683 Light path characterization, traffic protection, and wavelength defragmentation Feb. 11, 2014
8644710 Optical transport having full and flexible bandwidth and channel utilization Feb. 4, 2014
8625993 Wavelength-switched optical add-drop multiplexer with wavelength broadcasting capability Jan. 7, 2014
8625994 Directionless reconfigurable optical add-drop multiplexer systems and methods Jan. 7, 2014
8625999 Modulator for frequency-shift keying of optical signals Jan. 7, 2014
8611749 Technology for arranging optical channels in switching optical equipment Dec. 17, 2013
8611743 Optical-layer traffic grooming in flexible optical networks Dec. 17, 2013
8606104 Wavelength selective switch Dec. 10, 2013
8600229 Method and system for shared protection in wavelength division multiplexing loop network Dec. 3, 2013
8594503 Method and system for multiplexer waveguide coupling Nov. 26, 2013
8594504 Optimised multiplexer/demultiplexer optical structure Nov. 26, 2013
8582971 Method and apparatus to deploy fiber optic based access networks Nov. 12, 2013
8565603 Reconfigurable optical add drop multiplexer core device, procedure and system using such device, optical light distributor, and coupling-ratio assigning procedure Oct. 22, 2013
8565608 Optical network with switchable drop filters Oct. 22, 2013
8554081 Optical add/drop multiplexer including reconfigurable filters and system including the same Oct. 8, 2013
8554071 Optical transmission apparatus and continuity testing method Oct. 8, 2013
8554028 Upstream fiber optic couplers and methods for power splitting passive optical networks Oct. 8, 2013
8542999 Minimizing bandwidth narrowing penalties in a wavelength selective switch optical network Sep. 24, 2013
8538209 Methods and apparatus of WDM fiber reflector Sep. 17, 2013
8538267 ROADM transponder aggregator systems and methods of operation Sep. 17, 2013
8526813 Optical switch with power equalization Sep. 3, 2013
8509621 Method and system for optical connection validation Aug. 13, 2013
8494365 Random gap insertion in an optical ring network Jul. 23, 2013
8483564 Hybrid optical add-drop multiplexing network and wavelength allocation for the same Jul. 9, 2013
8463127 Optical switching architectures for nodes in WDM mesh and ring networks Jun. 11, 2013
8457497 Optimized directionless optical add/drop module systems and methods Jun. 4, 2013
8451147 Data interface circuit May. 28, 2013
8452180 Optical multiplexer May. 28, 2013
8447183 Methods and apparatus for performing directionless and contentionless wavelength addition and subtraction May. 21, 2013
8437633 Optical network and control method therefor May. 7, 2013
8433196 Optical band splitter/combiner device comprising a three-arms interferometer Apr. 30, 2013
8428461 Apparatus for managing an optical signal Apr. 23, 2013
8412050 Coaxial free space optical telescope and systems using the same Apr. 2, 2013
8406624 Degree extending method and optical hub node apparatus Mar. 26, 2013
8401398 Modulator for frequency-shift keying of optical signals Mar. 19, 2013
8401392 Flexible branching unit and system including the same Mar. 19, 2013
8401391 Channel power management in a branched optical communication system Mar. 19, 2013
8385743 Channel allocation method for multi-channel optical transmission and optical transmission system utilizing the method Feb. 26, 2013

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