Patent ID: 8391725

Claim:
An optical receiver comprising: a local oscillation light source configured to output a local oscillation light having a wavelength determined on the basis of a plurality of wavelength setting parameters; a receiving device configured to generate an electric signal by photoelectric conversion from a light obtained by mixing a received signal light and the local oscillation light; a signal processing device configured to decode a received signal on the basis of the electric signal; a signal determination device configured to determine whether or not the electric signal is output from the receiving device; and a local oscillation light control device configured to control the wavelength of the local oscillation light output from the local oscillation light source by altering the plurality of wavelength setting parameters according to a parameter control sequence determined for the plurality of wavelength setting parameters, to terminate wavelength control of the local oscillation light when the electric signal is output from the receiving device and the received signal is decoded correctly by the signal processing device, and to continue the wavelength control of the local oscillation light when the electric signal is output from the receiving device and the received signal is not decoded correctly by the signal processing device.