Loss point detecting method and distributed raman amplifier...

Details Loss point detecting method and distributed raman amplifier... Loss point detecting method and distributed raman amplifier...

2006-04-18

2006-04-18

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Raman or brillouin process

C359S341440, C398S013000, C398S014000, C398S015000, C398S021000

Reexamination Certificate

active

07031049

ABSTRACT:
Power of scattered light separated from an optical transmission path is monitored, part of the excitation light is separated and power thereof is monitored, power of reflected light which passes in a direction opposite to a direction in which signal light passes through the optical transmission path is monitored, and, when monitored power of an excitation light reaches a predetermined determination value, whether or not any loss point occurs is determined, based on a ratio between the monitored power of the scattered light and the monitored power of the reflected light.

REFERENCES:
patent: 5673108 (1997-09-01), Takeuchi
patent: 5963362 (1999-10-01), Fukaishi
patent: 6462861 (2002-10-01), Ohshima et al.
patent: 6674518 (2004-01-01), Asher et al.
patent: 6674567 (2004-01-01), Ohtani et al.
patent: 2004/0196158 (2004-10-01), Sugaya et al.
patent: 2000-314902 (2000-11-01), None
patent: 2001-185787 (2001-07-01), None

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