Optical receiving apparatus and method

Optical communications – Receiver

Reexamination Certificate

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C398S208000

Reexamination Certificate

active

06856771

ABSTRACT:
An optical receiving apparatus according to the present invention comprises an optical signal branching circuit for receiving a signal light input from an optical transmission line, a discriminator for discriminating an output signal of the optical signal branch circuit, an evaluator for evaluating characteristics of another output signal of the optical signal branching circuit. The evaluator includes a saturable absorber for determining the discrimination threshold of the discriminator.

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European Search Report dated Aug. 8, 2001 corresponding to European patent application EP 00 10 8680.
Patent Abstract of Japan, Publication No. 56,090634, published Jul. 22, 1981.
N.S. Bergano et al., “Margin Measurements in Optical Amplifier Systems”, IEEE Photonics Technology Letters, vol. 5, No. 3, Mar. 1993, pp. 304-306.

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