DISTRIBUTION RAMAN AMPLIFICATION DEVICE, DISTRIBUTION RAMAN AMPLIFICATION METHOD AND DISTRIBUTION RAMAN AMPLIFICATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To monitor a Raman gain in real time.SOLUTION: A distribution Raman amplification device 1 includes a Raman excitation light source 11 for outputting Raman exciting light to a transmission path fiber 2 for propagating signal light, a light source control part 12 for controlling output wavelength of the Raman excitation light source 11 so as to prevent Raman exciting light from changing the wavenumber spectrum of signal light, an intensity measurement part 13 for measuring the intensity of Raman exciting light before and after propagation through the transmission path fiber 2, and a loss calculation part 14 for calculating the loss of Raman exciting light through the transmission path fiber 2 based on the intensity of Raman exciting light before and after propagation through the transmission path fiber 2, measured by the intensity measurement part 13.