OPTICAL SIGNAL MEASURING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an optical signal measuring device capable of estimating OSNR of the polarized and multiplexed signal.SOLUTION: An optical signal measuring device includes: an optical port for input from which an optical signal to be measured is inputted; an optical filter optically connected to the optical port for input; a polarization filter optically connected to the optical filter; and three or more of optical receivers optically connected to an output port of the polarization filter. A band of the optical receiver is set to be 0.1 times or more of a baud rate of the optical signal to be measured and also set to be 0.1 times or more of the band of the optical filter.