Patent ID: 8705984

Claim:
An optical transmission apparatus, comprising: an optical receiver; the optical receiver comprising: an optical splitter; a variable optical attenuator to attenuate light from the optical splitter; a photoelectric transducer configured to output a control signal for the variable optical attenuator by feed-forward control, based on monitor light received from the optical splitter; a module detector to detect a module-ID indicating a production maker of an optical receiver module that receives the light attenuated by the variable optical attenuator; and a variable optical attenuator controller to control so as to change control parameters of the variable optical attenuator in accordance with the module-ID detected by the module detector, wherein the variable optical attenuator controller controls the variable optical attenuator using, as the control parameter, at least one of a threshold value for whether the feed-forward control is executed based on the control signal and a ratio between feedback control and the feed-forward control.