Crosstalk coefficient estimation device and the crosstalk coefficient estimation method

摘要

PROBLEM TO BE SOLVED: To provide a configuration and a method for appropriately estimating polarization crosstalk between channels in an optical communication system.;SOLUTION: A crosstalk coefficient estimating apparatus includes a complex conjugate unit, a multiplying unit, and a filter and is used to estimate a crosstalk coefficient of crosstalk inflicted on a first channel in an optical fiber transmission system including a plurality of channels. The complex conjugate unit obtains a complex conjugate signal for signal in one polarization-state of a second channel. The multiplying unit multiplies the complex conjugate signal obtained by the complex conjugate unit by signal in another polarization-state of the second channel. The filter filters the multiplication result of the multiplying unit to obtain a crosstalk coefficient of crosstalk inflicted on the signal in one polarization-state of the first channel. A transfer function of the filter is set based on a system parameter of the optical fiber transmission system.;COPYRIGHT: (C)2011,JPO&INPIT