Optical communications – Optical repeater system – Monitoring
Reexamination Certificate
2006-04-18
2006-04-18
Sedighian, M. R. (Department: 2633)
Optical communications
Optical repeater system
Monitoring
C398S032000, C398S033000, C398S037000, C398S097000, C398S160000
Reexamination Certificate
active
07031618
ABSTRACT:
In an optical transmission system, an optical terminal transmits a plurality of tone signals corresponding to a plurality of gain bands, where the frequencies of the plurality of tone signals are different from each other, and each of the plurality of tone signals has a characteristic which is varied according to detected power of optical signals in the corresponding gain band. Each optical repeater receives the plurality of tone signals, extracts the characteristics of the plurality of tone signals, and compares a signal representing each characteristic with a reference signal. The optical repeater controls the gains of optical amplification in the plurality of gain bands based on the comparison result so as to equalize the gains in the plurality of gain bands.
REFERENCES:
patent: 5513029 (1996-04-01), Roberts
patent: 5654816 (1997-08-01), Fishman
patent: 5894362 (1999-04-01), Onaka et al.
patent: 6160649 (2000-12-01), Horiuchi et al.
patent: 6212001 (2001-04-01), Bode et al.
patent: 6219176 (2001-04-01), Terahara
patent: 6259553 (2001-07-01), Kinoshita
patent: 6271945 (2001-08-01), Terahara
patent: 6510000 (2003-01-01), Onaka et al.
patent: 6735395 (2004-05-01), Bai
patent: 2004/0114933 (2004-06-01), Shimomura et al.
patent: 0782 225 (1997-07-01), None
patent: 782289 (1997-07-01), None
patent: 0917313 (1999-05-01), None
patent: 933 894 (1999-08-01), None
patent: 2280561 (1995-02-01), None
patent: 2327309 (1999-01-01), None
patent: 2001007768 (2001-01-01), None
Combined Search and Examination Report for corresponding UK Application No. GB0502271.0 mailed Mar. 31, 2005.*
Combined Search and Examination Report for corresponding UK Application No. GB0502272.8 mailed Mar. 31, 2005.*
Fujitsu Limited
Sedighian M. R.
Singh Dalzid
Staas & Halsey , LLP
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