| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain an optical signal receiver capable of making group delay characteristics of a signal to be input in a signal demodulation part constant to surely demodulate an FDM signal. <P>SOLUTION: The optical signal receiver is provided with: a monitoring part which monitors a current value of an electric signal converted by a photoelectric conversion part; and a control part which performs control so that a current value of an electric signal output from an attenuation part becomes constant based on the current value monitored by the monitoring part. <P>COPYRIGHT: (C)2009,JPO&INPIT |
