| 摘要 |
A Raman gain control method of controlling a Raman gain caused by simultaneous application of pump lights of a plurality of wavelengths to an optical fiber, which includes, based on a relation of a ratio coefficient which is a ratio of power of each pump light to total power of all the pump lights with the Raman gain, from a designated value of the Raman gain, calculating power of each pump light realizing the designated Raman gain within a designated wavelength range, and controlling power of each pump light applied to the optical fiber to apply each pump light at each power calculated.
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