OPTICAL NODE, OPTICAL NETWORK SYSTEM, AND POLARIZATION MODE DISPERSION MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To easily measure PMD characteristics in each span inexpensively without influence on an optical signal in use.SOLUTION: A plurality of optical nodes 100 are disposed on the transmission line 101. Each optical node 100 includes a signal generator 120 for generating a measuring signal to measure a polarization mode dispersion value and transmitting the signal to the transmission line 101 and a monitor 121 for detecting the measuring signal from the transmission line 101 and measuring a polarization mode dispersion value in the span up to the signal generator 120 by executing signal processing to the measuring signal.