Monitoring apparatus for optical fiber amplifier

Details Monitoring apparatus for optical fiber amplifier Monitoring apparatus for optical fiber amplifier

1998-01-08

1999-10-05

Moskowitz, Nelson

Optical: systems and elements

Optical amplifier

Optical fiber

359137, 359337, H01S 300, H01S 3131, G02B 626

Patent

active

059633620

ABSTRACT:
A monitoring apparatus for an optical fiber amplifier includes a branch member, an optical filter, a light-receiving element, and a detector. The branch member branches reflected light obtained by reflecting, by an output portion, output light from an optical fiber amplifier for directly amplifying an optical signal. The optical filter removes a signal wavelength component from the reflected light branched by the branch member. The light-receiving element receives the reflected light output from the optical filter from which the signal wavelength component is removed. The detector outputs a detection signal representing an abnormality on a transmission path when the output level of the light-receiving element is a predetermined level or higher.

REFERENCES:
patent: 5317660 (1994-05-01), Veith
patent: 5506724 (1996-04-01), Shimizu et al.
patent: 5521751 (1996-05-01), Aide et al.
patent: 5633749 (1997-05-01), Shibuya
patent: 5680246 (1997-10-01), Takahashi et al.

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