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 first introduced.
[0052] The control of the Raman amplifier is based on the working principle of the Raman amplifier. The Raman amplifier works based on the stimulated Raman scattering (SRS) effect in the optical fiber. The pump light of a single wavelength can only effectively amplify the signal light in the limited wavelength range (about 40nm), and the maximum is achieved where the frequency difference between the signal light and the pump light is 13.2THz (that is, the wavelength separation is about 100nm). Gain. In order to achieve gain within the entire transmission bandwidth, pump light of multiple wavelengths must be used. For example, there are at least two C BANDs and at least three C+L BANDs. We can adjust the gain of signal light of different wavelengths by adjusting the pump power of different wavelengths. This is the reason why...
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