Optical communications – Transmitter and receiver system – Including feedback from receiver
Reexamination Certificate
2006-03-28
2006-03-28
Bello, Agustin (Department: 2633)
Optical communications
Transmitter and receiver system
Including feedback from receiver
C398S158000
Reexamination Certificate
active
07020399
ABSTRACT:
An optical transmission apparatus and method for changing a rise time (tr) and fall time (tf) of a signal light to be transmitted, to reduce wavelength dispersion characteristics and nonlinear effect of a transmission path. A transmitter includes a trtfadjusting circuit capable of adjusting trand tfof a modulation signal so that the modulation signal is optimized in accordance with reception characteristics. A modulator then modulates a light with this adjusted modulation signal, and the modulated light is then transmitted to a receiver via a transmission path. Therefore, by transmitting the modulated light having changed trand tf, the influence of wavelength dispersion characteristics and nonlinear effect of the transmission path can be offset, so that the waveform deterioration of signal light after transmission can be reduced.
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First Office Action dated Aug. 12, 2003, issued in corresponding Japanese Application H10-071525 including English language translation and list of reference cited.
Miyata Hideyuki
Nakamoto Hiroshi
Onaka Hiroshi
Bello Agustin
Fujitsu Limited
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