Gain setting method in wavelength division multiplex...

Optical communications – Optical repeater system – Monitoring

Reexamination Certificate

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Details

C398S037000, C398S097000, C398S157000, C398S173000, C359S341410

Reexamination Certificate

active

07315696

ABSTRACT:
Gain setting of a receiving amplifier, is performed by detecting the necessity of gain setting when a receiving amplifier is turned on, requesting WDM transmission equipment in a preceding station to output ASE light; in a WDM transmission equipment of the preceding station, shutting off both passing-through light and added light, and outputting the ASE light corresponding to a predetermined number of wavelengths of signal light; in the receiving amplifier of the WDM transmission equipment in the station of interest, performing the gain setting by use of the ASE light; and on completion of the gain setting, the WDM transmission equipment of the station of interest, requesting the WDM transmission eouipment of the preceding station to halt the ASE light output, and the WDM transmission equipment of the preceding station, halting the ASE light output upon receiving the request and switching the output to an optical signal output.

REFERENCES:
patent: 6049413 (2000-04-01), Taylor et al.
patent: 6600596 (2003-07-01), DeGrange, Jr. et al.
patent: 7002734 (2006-02-01), Horachi et al.
patent: 2002/0039226 (2002-04-01), Murakami et al.
patent: 2002/0060837 (2002-05-01), Inagaki et al.
patent: 2002/0154359 (2002-10-01), Tsuda et al.
patent: 2005/0047781 (2005-03-01), El-Reedy et al.
patent: 2006/0082868 (2006-04-01), Yamashita
patent: 1085683 (2001-03-01), None
patent: 9-107141 (1997-04-01), None
patent: WO 0165736 (2001-09-01), None

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