Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-01-09
1999-11-30
Bacares, Rafael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359110, 359166, H04J 1402
Patent
active
059952547
ABSTRACT:
A wavelength division multiplexing light transmitting system which can monitor its transmission line. In which, one light among the signal lights to be wavelength multiplexed is defined as an optical fiber transmission line monitor light. A transmitter multiplexes and transmits the monitor light with the other signal lights. These lights are attenuated and introduced to the other transmission line at return circuits 12. A receiver branches the returned lights, selects the monitor light and detects a condition of the transmission line by correlation processing. The system extremely improves a SNR and a detection time of the monitor signal.
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patent: 5315674 (1994-05-01), Asako
patent: 5513029 (1996-04-01), Roberts
patent: 5687013 (1997-11-01), Henmi
Aoki Yasuhiro
Koga Tadashi
Bacares Rafael
NEC Corporation
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