Optical receiver, optical receiving device, and method for correcting received optical intensity
The common mode rejection ratio (CMRR) decreases due to the difference in receiving intensity of the optical signal or in photoelectric conversion efficiency of the photodiode in the related coherent optical receiver, therefore, an optical receiver according to an exemplary aspect of the present invention includes a first photodiode receiving a first optical signal and outputting a positive signal; a second photodiode receiving a second optical signal and outputting a complementary signal; a differential transimpedance amplifier receiving the positive signal and outputting an amplified positive signal voltage, and receiving the complementary signal and outputting an amplified complementary signal voltage; and a gain adjustment means for adjusting a first gain of a gain of the differential transimpedance amplifier for the positive signal and a second gain of a gain of the differential transimpedance amplifier for the complementary signal.
NEC CORPORATION
H H H H
H03F H04B H04B H03F
inventional inventional inventional inventional
Yasuyuki
Suzuki