Optical module and an optical receiver using the same

Details Optical module and an optical receiver using the same Optical module and an optical receiver using the same

2008-01-01

2008-01-01

Chan, Jason (Department: 2613)

Optical communications

Receiver

C398S212000, C398S213000, C398S214000

Reexamination Certificate

active

07315698

ABSTRACT:
The present invention provides an optical receiver that uses an avalanche photodiode (APD) whose multiplication factor m is controlled to compensate the temperature dependence thereof. An optical module of the present invention includes a light-receiving device in addition to the APD. The light-receiving device may be a semiconductor thin film or a PIN photodiode, and is disposed in front of the APD. Accordingly, the light-receiving device receives a portion of signal light, and transmits a rest portion thereof. The APD receives the rest portion of the signal light. The bias voltage applied to the APD is so controlled that a first photocurrent generated in the light-receiving device and a second photocurrent generated in the APD maintain a constant ratio.

REFERENCES:
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patent: 63-077171 (1988-04-01), None
patent: 63-105541 (1988-05-01), None
U.S. Appl. No. 11/006,192, dated Dec. 7, 2004, entitled “Photodetector and Optical Receiver”.

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