Optical receiving circuit

Details Optical receiving circuit Optical receiving circuit

1996-05-31

2000-05-02

Chan, Jason

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359189, H04B 1006

Patent

active

06057951&

ABSTRACT:
In an optical receiver circuit in which an optical input signal is amplified by an optical amplifier and converted to an electrical signal by optical detector, and the amplified optical signal is amplified by an equalization amplifier so as to obtain an optical received signal, an output peak level of the equalization amplifier is detected by a peak detection circuit, an error difference of the peak level is amplified by an error amplification circuit, and a gain of the optical fiber amplifier is controlled by a gain control circuit, thereby fixing a level of the received signal. In the above-mentioned structure, an input signal loss detection circuit detects an input signal loss from an output of the peak detection circuit, and the gain of the optical fiber amplifier is controlled by the gain control circuit to be sufficiently lower than the maximum gain at the time of the detection. Thereby, even in a case where a level of the optical input signal abruptly increases from the input signal loss, damage of an optical detector and saturation of a receiving electric circuit can be prevented, so that the circuit can be operated again.

REFERENCES:
patent: 5701195 (1997-12-01), Chikama
patent: 5764404 (1998-06-01), Yamane et al.

Affiliated with

Also associated with

Rating

Optical receiving circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical receiving circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical receiving circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1598505