Fiber optic receiver with an adjustable response preamplifier

Details Fiber optic receiver with an adjustable response preamplifier Fiber optic receiver with an adjustable response preamplifier

2005-08-09

2005-08-09

Chan, Jason (Department: 2633)

Optical communications

Receiver

C375S317000

Reexamination Certificate

active

06928249

ABSTRACT:
A fiber optic receiver that includes an opto-electronic transducer, an adjustable response preamplifier circuit, and a post-amplifier circuit is described. The opto-electronic transducer is configured to generate an electrical data signal in response to a received optical data signal. The adjustable response preamplifier circuit is coupled to the opto-electronic transducer and is operable to amplify an electrical data signal generated by the opto-electronic transducer. The post-amplifier circuit is coupled to an output of the preamplifier circuit and is configured to transmit a mode control signal to the preamplifier circuit in response to a received control signal. By transmitting the mode control signal from the post-amplifier to the preamplifier, the adjustable response amplifier may be placed in the preamplifier stage within a receiver optical sub-assembly (ROSA). As a result, the fiber optic receiver may accommodate multiple operating modes (e.g., multiple bandwidth and power operating modes) while conforming to existing receiver optical sub-assembly (ROSA) size and pin count constraints.

REFERENCES:
patent: 3733514 (1973-05-01), Garuts
patent: 4124817 (1978-11-01), Takahashi
patent: 4591805 (1986-05-01), Highton
patent: 5604927 (1997-02-01), Moore
patent: 5673003 (1997-09-01), Zocher
patent: 5864416 (1999-01-01), Williams
patent: 6118829 (2000-09-01), North
patent: 6396351 (2002-05-01), Buescher et al.
patent: 2002/0076173 (2002-06-01), Jiang et al.

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