| 摘要 |
PROBLEM TO BE SOLVED: To provide monitoring of optical signal quality by measuring the quality of each polarization signal against a signal with the same frequency and using a simple configuration without need of an external modulator.SOLUTION: The present invention includes: training signal generation means that generates a different periodic training signal at each polarization and transmission means that transmits a polarization multiplexed signal with a training signal given, which are installed on the transmission side. The present invention further includes: polarization separation means that separates the signal received from the transmission means into specific polarization and first and second power measurement means that measures the power of the polarization-separated signal, which are installed on the reception side. |
