Patent ID: 9692545
Date: 2017-06-27
CPC Classifications: H04B,H04J

Claim:
1. An optical reception apparatus comprising: a local oscillator outputting local oscillation light having a prescribed wavelength; an optical mixer receiving the local oscillation light and a multiplexed optical signal in which optical signals being different in wavelength from each other are multiplexed, and selectively outputting an optical signal corresponding to the wavelength of the local oscillation light from the multiplexed optical signal; a photoelectric converter converting the optical signal output from the optical mixer to an electric signal; a variable gain amplifier amplifying the electric signal converted by the photoelectric converter, to generate an output signal whose output amplitude is amplified to a certain level; a gain control signal generating circuit generating a gain control signal for controlling a gain of the variable gain amplifier; and a monitor signal generating unit generating, using the gain control signal, a monitor signal corresponding to power of the optical signal output from the optical mixer, wherein