Dynamic feedback regulating and controlling method for power and gain chart of optical fibre Raman amplifier
A Raman amplifier and dynamic feedback technology, applied in the control of light, non-electrodynamic variable control, instruments, etc., can solve the problem that the contribution of the pump light to the gain spectrum is not independent.
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[0064] The specific method of regulating the FRA power and gain spectrum by using the correlation Π matrix algorithm in combination with Fig. 7 and Fig. 8 is as follows:
[0065] 1. Experimental determination of the Π matrix: Although the Π matrix can be theoretically calculated according to the fiber parameters and pumping conditions, in practical applications, the ΔG can be directly measured through experiments according to formula (7a)net and ΔP p,in It is more convenient and effective to determine the Π matrix. What is to be explained here is:
[0066] - at ΔG net In the actual measurement, it is neither required nor convenient to monitor the change of the entire gain spectrum, only the gain change of several characteristic channels is selected as the basis for pump optical power adjustment. In this way, the dimension M of the Π matrix can be reduced, and the amount of measurement and calculation can be greatly reduced. For example, for an FRA pumped by 4 wavelengths, i...
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