Optical communications – Receiver – Including optical element
Reexamination Certificate
2008-01-22
2008-01-22
Pascal, Leslie (Department: 2613)
Optical communications
Receiver
Including optical element
C398S213000, C398S201000
Reexamination Certificate
active
07321736
ABSTRACT:
The invention relates to an optical receiving station, an optical communication system, and a dispersion controlling method for precisely controlling chromatic dispersion in an optical transmission line or chromatic dispersion in an optical transmission line that varies with time. An optical receiving station is provided with a dispersion compensating section for receiving, via an optical transmission line, an optical signal modulated according to an optical duo-binary modulation method and for changing a dispersion value to be used for compensating for chromatic dispersion in an optical transmission line, an intensity detecting section for detecting the intensity of a specific frequency component of the optical signal output from the dispersion compensating section, and a controlling section for adjusting the dispersion value of the dispersion compensating section so that the output of the intensity detecting section has a predetermined extreme value.
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Akiyama Yuichi
Ishikawa George
Ooi Hiroki
Fujitsu Limited
Pascal Leslie
Staas & Halsey , LLP
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