OPTICAL RECEIVER

WIPO Patent Application WO/2021/161382

A1

Provided is an optical receiver with which it is possible to increase the stability of reception sensitivity of an APD module by shortening the response time of bias voltage applied to a light-receiving element in accordance with the light intensity of a received optical signal.　The optical receiver 100 according to the present disclosure comprises: a light-receiving element 1 that generates a current corresponding to the light intensity of the received optical signal; a bias voltage boost circuit 2 that supplies a bias voltage to the light-receiving element 1; a current/voltage conversion amplifier 3 that converts the current generated by the light-receiving element 1 to voltage; a first path 16 that connects the bias voltage boost circuit 2 and the light-receiving element 1, and is connected in parallel to its own bias resistor R and inductor L; a second path 17 connected in parallel to the first path 16 and having lower impedance than the first path 16; and a bias voltage control unit 11 that controls the bias voltage by switching to the first path 16 when the light intensity exceeds a preset light intensity threshold value, and switching to the second path 17 when the light intensity is less than or equal to the light intensity threshold value.

ISHIMURA YUTA (JP)

PCT/JP2020/005123

August 19, 2021

February 10, 2020

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MITSUBISHI ELECTRIC CORP (JP)

H04B10/69

WO2017203620A1	2017-11-30
WO2014128986A1	2014-08-28

JP2014107794A

2014-06-09

MURAKAMI, Kanako et al. (JP)

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