To prevent reduction in SN ratio due to temperature changes of a photodetector.
A laser receiving part 70 (photo-receiving device) has a PD part 74, a reception resonance part 75 and a temperature correction part 76. The PD part 74 includes a photodetector 41 the internal capacitance of which changes according to a reverse bias voltage and a temperature. The reception resonance part 75 includes an inductor which resonates with the internal capacitance of the photodetector 41. The temperature correction part 76 (temperature compensation circuit) maintains the internal capacitance of the photodetector at substantially constant level by changing the reverse bias voltage applied to the photodetector depending on a temperature change of the photodetector.
KAMEYAMA SHUNPEI
IMAKI MASAHARU
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