Optical communications – Optical repeater system – Monitoring
Reexamination Certificate
2005-12-27
2005-12-27
Payne, David C. (Department: 2638)
Optical communications
Optical repeater system
Monitoring
C398S173000, C398S175000, C398S181000, C359S334000, C359S341300
Reexamination Certificate
active
06980745
ABSTRACT:
An optical transmission system ensuring high-quality monitor control even if an optical fiber fault occurs. A monitor instruction sending unit sends a monitor instruction. An operating condition recognizing unit receives a response signal and recognizes the operating condition. A filtering unit filters the monitor instruction and the response signal. A monitor control unit monitors the operating condition of its own repeater in response to the monitor instruction, and generates resultant response information. A pump unit generates a pump light to cause Raman amplification within an optical fiber transmission medium. A regeneration control unit performs a regeneration control of the response signal to thereby create a regenerated signal. A modulation control unit modulates the pump light by the response information or the regenerated signal to thereby generate the response signal.
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United Kingdom Search Report Dated Oct. 16, 2002.
Deguchi Hiroyuki
Harasawa Shin-ichirou
Yokota Izumi
Fujitsu Limited
Payne David C.
Staas & Halsey , LLP
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