System and method for controlling single-stage multi-pump optical fiber amplifier

Abstract

The invention discloses a system and method for controlling a single-stage multi-pump optical fiber amplifier. For the characteristics of the single-stage multi-pump amplifier, under the required high-grain high-power output, a traditional control scheme can not consider the optical noise index and the transient characteristic at the same time; optical signals are amplified through the combination of the mixed structure of pump lasers with central wavelengths of 980 nm and 1480 nm and a special control method based on the mixed structure, the optical noise index and transient characteristic of the module are increased through a pump laser drive current distribution scheme and a special transient suppression scheme, and then the core performance of the optical amplifier is ensured. By means of the system and method, optical noise can be ensured, optical transient performance is optimized, and the aims can not be achieved through a traditional control technology. Through extensive experimental verification, it is found that by means of the scheme, the optical transient performance can be improved by 50% and the performance and product competitiveness of the whole module can be greatly improved under the high optical noise index.

Description

technical field [0001] The invention relates to the technical field of optical fiber amplifier control, in particular to a control system and method for a single-stage multi-pump optical fiber amplifier. Background technique [0002] With the continuous development of the optical communication industry, the optical fiber amplifier, as an important component in optical transmission, must continue to improve its related performance, and the requirements for power output and gain of the amplifier module are also increasing. In order to enable the fiber amplifier to have greater power output and greater gain, the number of pumps can only be increased when the capability of a single pump is limited. Based on product cost considerations, this multi-pump (>=2) The scheme of the optical structure generally adopts the scheme of mixed utilization of 980nm pump and 1480nm pump. Theoretically, the 980nm pump guarantees the noise figure of the module, and the 1480nm pump guarantees t...

AI Technical Summary

Problems solved by technology

For example, in the face of the ever-increasing amplifier power output index, the amplifier module must use more pump lasers to achieve this goal. Although increasing the number of lasers can solve the power output problem, it will bring other problems to the module. and transient performance degradation most prominently

Moreover, no specific technical solutions have been found for the single-stage multi-pump structure. If only the traditional control technology is used, many performances of the amplifier cannot be guaranteed, especially the noise figure and transient performance mentioned above. two o'clock

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