Optical receiver and detection method
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United States of America Patent
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Nov 8, 2016
Grant Date -
Aug 27, 2015
app pub date -
Feb 23, 2015
filing date -
Feb 24, 2014
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Abstract
The integrated optical receiver module includes a plurality of PDs each converting an optical signal to a current signal, and outputs a current signal selected from a plurality of current signals. The RSSI circuit converts the current signal into a voltage signal, outputs a first amplified signal obtained by amplifying the voltage signal by a first gain, and outputs a second amplified signal obtained by amplifying the voltage signal by a second gain larger than the first gain. The MCU outputs a first selection signal to the integrated optical receiver module to acquire intensity of the first amplified signal with respect to all of the current signals in a predetermined order, outputs a second selection signal to the integrated optical receiver module to acquire intensity of the second amplified signal with respect to all of the current signals in the ascending order of the acquired intensity of the first amplified signal, and derives intensity of each of the optical signals from the acquired intensity of the respective second signals.
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