Optical communications – Transmitter and receiver system – Including compensation
Reexamination Certificate
2007-04-03
2007-04-03
Sedighian, M. R. (Department: 2613)
Optical communications
Transmitter and receiver system
Including compensation
C398S158000, C398S192000, C398S194000, C398S198000
Reexamination Certificate
active
10411332
ABSTRACT:
Laser line-width compensation is performed by detecting noise in an optical signal output by a laser of an optical communications system and controlling a complex modulator to cancel the detected noise. Line-width compensation can be performed for both amplitude and phase noise in the optical signal. Noise measurements are used to compute a complex scalar. The complex scalar is used by a compensation processor to modify an input signal that is to be transmitted by the optical communications system. The modified input signal controls the complex modulator, which modulates the output signal to cancel the noise.
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O'Sullivan Maurice
Roberts Kim
Daniels Kent
Nortel Networks Limited
Ogilvy Renault LLP
Sedighian M. R.
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