Optical receiver with monolithically integrated photodetector

Details Optical receiver with monolithically integrated photodetector Optical receiver with monolithically integrated photodetector

H - Electricity

04

B

H04B 10/06 (2006.01) G02B 6/12 (2006.01)

Patent

CA 2705969

An optical receiver includes a photodetector for detecting incoming optical data signals and an amplifier for providing signal gain and current to voltage conversion. The detection signal generated by the photodetector can include a distortion component caused by an operating characteristic of the photodetector. A signal compensating circuit can reconstruct the received optical data signal by effectively canceling the distortion component. For this purpose, the signal compensating circuit can include a decision feedback equalizer implemented using at least one feedback filter matched to the operating characteristic of the photodetector causing the signal distortion so as to reproduce the distortion component for cancellation. Use of a control module can also configure the optical receiver in real time to account for other operating and environmental conditions of the optical receiver. Data rates in excess of 5Gbps can be realized in monolithic CMOS photodetectors when the signal compensating circuit is properly matched.

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