DEVICE AND METHOD FOR MONITORING OPTICAL PERFORMANCE PARAMETER, AND OPTICAL TRANSMISSION SYSTEM

摘要

The present invention discloses an apparatus and a method for monitoring an optical performance parameter, and an optical transmission system. The apparatus includes: a coherent receiving unit, configured to perform coherent synthesis on a received to-be-detected optical signal and a multi-wavelength local oscillation laser beam, and convert a coherent receiving signal formed by means of the coherent synthesis into an analog electrical signal; a data acquiring unit, configured to acquire the analog electrical signal output by the coherent receiving unit, and convert the analog electrical signal into a digital signal; a power spectrum generation unit, configured to process the digital signal output by the data acquiring unit, to generate a continuous full power spectrum of the to-be-detected optical signal; and an optical performance parameter monitoring unit, configured to monitor, according to the continuous full power spectrum generated by the power spectrum generation unit, an optical performance parameter of a transmission link carrying the to-be-detected optical signal. According to the apparatus and the method for monitoring an optical performance parameter, and the optical transmission system in embodiments of the present invention, an optical performance parameter can be monitored with high precision.