Optical wavelength division multiplexed signal monitoring apparatus and method, and optical signal quality monitoring apparatus and the optical signal waveform measurement apparatus

摘要

PPROBLEM TO BE SOLVED: To miniaturize an apparatus for monitoring optical signal quality degradation of an optical wavelength division multiplexed signal. PSOLUTION: An electric signal processing for evaluating an optical signal quality parameter on the basis of an optical signal intensity distribution is turned into one system and a plurality of wavelength channels are processed altogether. To monitor the optical signal quality degradation in the optical wavelength division multiplexed signal by a simple configuration, the following configurations are used: A configuration using an optical wavelength division demultiplexer 11 and a sampling clock generator 17 to make the electric signal processing of an electric signal processor 19 into one; A configuration using an optical sampling pulse train generator, an optical multiplexer, a nonlinear optical medium, and the optical wavelength division demultiplexer to the electric signal processing of the electric signal processor into one; or a configuration using a selection wavelength control section, an optical wavelength selecting section, and the sampling clock generator to make one electric signal. PCOPYRIGHT: (C)2003,JPO