Light spectrum detecting device and method, and Raman amplifier feedback control device and method
A Raman amplifier and spectral detection technology, applied in the field of optical transmission, can solve the problems of large difference in signal optical power, difficult control of optical relay units, unsuitable for commercial use, etc., to achieve joint control, improve reliability and flexibility Effect
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[0051] Before describing the embodiments of the present invention in detail, the principle of gain spectrum control of the Raman amplifier is firstly introduced.
[0052] The control of the Raman amplifier is based on the working principle of the Raman amplifier. Raman amplifiers work on the basis of the Stimulated Raman Scattering (SRS) effect in optical fibers. The pump light of a single wavelength can only effectively amplify the signal light within a limited wavelength range (about 40nm), and the maximum frequency difference is achieved where the frequency difference between the signal light and the pump light is 13.2THz (that is, the wavelength is separated by about 100nm). gain. In order to achieve gain over the entire transmission bandwidth, multiple wavelengths of pump light must be used. For example, there are at least two C BANDs, and at least three C+L BANDs. By adjusting the pump power of different wavelengths, we can adjust the gain of signal light of different w...
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