Optical communications – Receiver
Reexamination Certificate
2007-04-03
2007-04-03
Leung, Christina Y. (Department: 2633)
Optical communications
Receiver
C398S079000, C398S212000, C398S214000, C398S176000, C398S180000, C398S183000, C398S184000, C398S185000, C398S186000, C398S187000, C398S188000
Reexamination Certificate
active
09853318
ABSTRACT:
A method and system for transmitting information in a wavelength division multiplex (WDM) or other suitable multichannel optical communication system includes receiving a multichannel signal having a symbol rate and comprising a plurality of non-intensity modulated optical information signals. The non-intensity modulated optical information signals have a minimum channel spacing comprising a multiple of the symbol rate within 0.4 to 0.6 of an integer. The non-intensity modulated optical information signals are separated from the multichannel signal and each converted into an intensity modulated optical information signal using an asymmetric interferometer. A data signal is recovered from the intensity modulated optical information signal.
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Baker & Botts L.L.P.
Fujitsu Limited
Leung Christina Y.
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