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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.

Inactive Publication Date: 2003-11-19
TSINGHUA UNIV
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Problems solved by technology

However, the shaping mechanism of FRA gain spectrum is fundamentally different from that of EDFA: first, FRA does not have a physical reference such as "number inversion degree"; second, the gain spectrum of multi-wavelength pumped FRA is determined by the gain of each pump wavelength The spectrum is superimposed, and there is an additional SRS effect between the pump lights of different wavelengths and between the signal lights during the pump amplification process, so that the contributions of the pump lights of each wavelength to the gain spectrum are not independent of each other.

Method used

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  • Dynamic feedback regulating and controlling method for power and gain chart of optical fibre Raman amplifier
  • Dynamic feedback regulating and controlling method for power and gain chart of optical fibre Raman amplifier
  • Dynamic feedback regulating and controlling method for power and gain chart of optical fibre Raman amplifier

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Embodiment Construction

[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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Abstract

The method obtains a correlation linear matrix which is convenient for experimental measurement by utilizing perturbation theory and approximate method to establish simple matrix algorithm in depending upon relation of FRA gain spectrum variation amount and multiwavelength pumping light power regulation amount based on FRA actual operation state in engineering system of wavelength division multiplexing. To calculate out the corresponding regulation value of pumping light power according to the differential value of gain spectrum at monitored apparent gain spectrum off-flag, the on-line dynamic feedback regulation and control can be achieved for FRA power and gain spectrum in large scale of dynamic scope.

Description

technical field [0001] The dynamic feedback control method of optical fiber Raman amplifier (FRA) power and gain spectrum belongs to the technical field of high-speed broadband optical fiber communication and optical amplifier, especially relates to the channel gain spectrum and power spectrum in the wavelength division multiplexing (WDM) optical fiber communication network using FRA dynamic balance. Background technique [0002] With the rapid growth of various communication services such as data, voice, image, and multimedia in recent years, the transmission capacity of WDM optical communication systems has been continuously upgraded. As a new generation of optical amplification technology, FRA shows attractive application prospects in high-speed, large-capacity, and long-distance DWDM optical fiber communication networks due to its unique characteristics of low noise, broadband, and adjustable working band. In recent years, technological breakthroughs in high-power pump ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/39G05D25/00H04B10/293H04J14/02
CPCY02B30/72
Inventor 张巍彭江得刘小明
Owner TSINGHUA UNIV
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