Gain spectrum regulation and control method and device for optical fiber Raman amplifier

Abstract

The invention provides a gain spectrum regulation and control method and device for an optical fiber Raman amplifier, and the method comprises the steps: calculating an optimal estimation value of an optical fiber Raman amplifier gain spectrum in a current state through extended Kalman filtering, and calculating a first offset between the optimal estimation value and an ideal gain spectrum; and calculating a pumping wavelength offset and a pumping power offset according to the first offset and the first correlation matrix so as to determine the driving voltage adjustment amount of the flexible grid optical network; therefore, dynamic adjustment is realized, and the flatness of a gain spectrum of the optical fiber Raman amplifier can be greatly improved. Based on the perturbation theory, the relation between the pumping power adjustment amount and the gain spectrum variation of the optical fiber Raman amplifier under multiple pumping wavelength combinations is solved, a first correlation matrix is constructed, and efficient and rapid feedback adjustment can be achieved.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a method and device for controlling the gain spectrum of an optical fiber Raman amplifier. Background technique [0002] With the rapid development of data services, the rate of optical fiber communication systems is gradually increasing rapidly, which puts forward higher requirements for key technologies in optical fiber communication systems such as optical amplifiers. Compared with erbium-doped fiber amplifiers, Raman amplifiers have high gain, wide spectrum range, low noise index, small crosstalk, and insensitivity to temperature. The gain medium is common transmission fiber, so it has excellent compatibility, and Raman amplifiers The gain wavelength of the laser is only determined by the pump light, so as long as the appropriate wavelength is selected, optical signals of all wavelengths can be amplified theoretically, and it is less affected by nonlinearity. These ad...

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Problems solved by technology

[0004] The embodiment of the present invention provides a method and device for controlling the gain spectrum of an optical fiber Raman amplifier, to eliminate or improve one or more defects in the prior art, and to solve the problem of signal light with different wavelengths in the working band being pulled through the optical fiber. The problem of uneven gain when the Mann amplifier is amplified

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