| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an average length detection device, a method and an optical coherent receiver. <P>SOLUTION: The average length detection method is an average length detection method to detect whether an average length of an averaging unit used by a polarization crosstalk canceling device 111 of a receiver is long or short, and includes to determine the size of a residual polarization crosstalk coefficient of the receiver and to determine an index to show whether the average length of the averaging unit is long or short in accordance with the determined magnitude of the residual polarization crosstalk coefficient. <P>COPYRIGHT: (C)2012,JPO&INPIT |
