OPTICAL SIGNAL QUALITY EVALUATION DEVICE AND OPTICAL SIGNAL QUALITY EVALUATION METHOD

摘要

PROBLEM TO BE SOLVED: To simply evaluate the quality of an optical signal including the information about the phase of a carrier, e.g., an optical signal subjected to quadrature phase amplitude modulation.;SOLUTION: An optical signal quality evaluation device includes a delay interference optical signal generation unit, a photoelectric conversion unit, and a sampling unit. The delay interference optical signal generation unit generates a delay interference optical signal, by performing delay interference of 1 (baud) time for an evaluation optical signal. The photoelectric conversion unit generates an evaluation optical signal and a delay interference optical signal, by converting the evaluation optical signal and delay interference optical signal into electric signals. The sampling unit generates an evaluation sampling signal and a delay interference sampling signal, by sampling the evaluation electric signal and delay interference electric signal at 1 (baud) time interval.;COPYRIGHT: (C)2014,JPO&INPIT