Optical communications – Multiplex – Subcarrier multiplexing
Reexamination Certificate
2006-07-11
2006-07-11
Pascal, Leslie (Department: 2633)
Optical communications
Multiplex
Subcarrier multiplexing
C398S065000, C398S074000, C398S152000, C398S163000, C398S184000, C398S185000, C398S205000
Reexamination Certificate
active
07076169
ABSTRACT:
A system for optical communication send optical signals over a plurality of wavelength channels. Each wavelength channel comprises a number of orthogonal subchannel frequencies which are spaced apart from one another by a predetermined amount. Each of the subchannel frequencies is modulated with data from a data stream. The data modulation scheme splits a subchannel frequency code into H and V components, and further processes the components prior to modulation with data. The various data-modulated subchannels are then combined into a single channel for transmission. The received signals are detected and demodulated with the help of a symbol timing recovery module which establishes the beginning and end of each symbol. A polarization mode distortion compensation module at the receiver is used to mitigate the effects to polarization more distortion in the fiber.
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Demir Alper
Feldman Peter
Kinget Peter
Krishnapura Nagendra
Meiman Yehouda
CeLight, Inc.
Davis Paul
Heller Ehrman LLP
Pascal Leslie
Singh Dalzid
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