| 摘要 |
A method of wavelength dispersion compensation is disclosed that is able to suppress the cost with a simple configuration without providing a light source on the transmitting side for generating optical signals for measurement use. In the transmitting device, excitation light is intermittently output to an optical amplifier for amplification of an optical signal to be transmitted, and an wavelength-dispersion-detection optical signal is output to an optical transmission path. In a receiving device, light components having different wavelengths are extracted from the wavelength-dispersion-detection optical signal transmitted through the optical transmission path, a difference in propagation time of the light components having different wavelengths through the optical transmission path is obtained, and a value of wavelength dispersion of a wavelength-dispersion-variable element is adjusted so that the difference in propagation time becomes zero. With the obtained value of wavelength dispersion, wavelength dispersion in the optical transmission path is compensated for.
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