| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical reception device which can suppress quality deterioration of an optical signal. <P>SOLUTION: The optical reception device 100 includes an MZI1, a twin PD2, a dither signal producing part 3, an envelope detecting part 5, a synchronization detecting part 6, a lock detecting part 7, a bias control part, and a frame processing part. When the frame processing part 11 does not detect a frame after outputting a lock signal from the lock detecting part 7, the optical reception device 100 performs a signal inverting process for inverting and recognizing the logic of a signal to be input to the frame processing part 11, or performs an initial value changing process for changing a bias initial value. <P>COPYRIGHT: (C)2011,JPO&INPIT |
