WAVELENGTH-MULTIPLEXED OPTICAL TRANSMISSION SYSTEM

摘要

PROBLEM TO BE SOLVED: To inexpensively realize a wavelength-multiplexed optical transmission system wherein wavelengths can be flexibly and efficiently disposed or set in accordance with required transmission capacity.

SOLUTION: A frequency-unselective optical power splitter 11 is provided as a wavelength demultiplexing part in both ends of a transmission line 3 composed of an optical fiber 1 and an optical amplifier 2 and further, a homodyne detector 13 for converting a received optical signal into an electric signal by performing signal detection using homodyne detection and a low-pass filter 14 for extracting an electric signal of a wavelength in a desired band from an output of the homodyne detector 13 are provided on the post-stage of the optical power splitter 11 on a receiving side, a part of light from a light source for optical signal transmission is split, and the split light is inputted to the homodyne detector 13 as local emission for homodyne detection.

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