| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical receiver, in which the abnormality in some channel will not affect to the other channels. <P>SOLUTION: In the optical receiver, which inputs optical DQPSK signals supplied from external units into first and second delay interferometers 2, 3 respectively, then, the output light of the first and second delay interferometers 2, 3 is reproduced by first and second photodetectors 4, 5 as the binary NRZ (Non Return to Zero) signal of a first and second channels, the delay times of the first and second delay interferometers 2, 3 are controlled through feedback control by control systems independent in each first and second channels. <P>COPYRIGHT: (C)2010,JPO&INPIT |
