Optical transmission system

Details Optical transmission system Optical transmission system

2005-07-11

2009-06-23

Phan, Hanh (Department: 2613)

Optical communications

Optical repeater system

Monitoring

C398S173000, C398S181000, C398S033000, C398S160000, C398S018000, C359S337000, C359S341300, C359S341200

Reexamination Certificate

active

07551857

ABSTRACT:
An optical amplifier may be quickly returned from a shutdown state to a regular state after getting recovery information of a fault. Gain setting by ASE is conducted to the repeaters on the up-stream side during the shutdown state, by outputting ASE light with the same intensity as the WDM signal. Accordingly, before realizing the recovery of shutdown, the gain setting is completed with the light whose intensity is within the safe criterion. After realizing the recovery of shutdown, the optical transmission system can be returned quickly to the regular operating state after recovery of shutdown state.

REFERENCES:
patent: 6344915 (2002-02-01), Alexander et al.
patent: 6359708 (2002-03-01), Goel et al.
patent: 6504630 (2003-01-01), Czarnocha et al.
patent: 6681079 (2004-01-01), Maroney
patent: 2003/0011855 (2003-01-01), Fujiwara
patent: 2003/0035184 (2003-02-01), Deguchi et al.

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