A control system and control method for a single-stage multi-pump optical fiber amplifier
A technology for optical fiber amplifiers and control systems, applied in instruments, optics, nonlinear optics, etc., can solve the problems of noise index and transient performance deterioration, amplifier performance cannot be guaranteed, etc., to improve optical transient performance and optimize optical transient performance. performance, improved performance and the effect of product competitiveness
Active Publication Date: 2018-12-14
GUANGXUN SCI & TECH WUHAN
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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
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[0035] The technical solution of the invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.
[0036] First introduce the fiber amplifier system, as follows:
[0037] figure 1 It is a schematic diagram of the optical structure of a single-stage 2-pump optical fiber amplifier system provided by a specific embodiment of the present invention. like figure 1As shown, taking the erbium-doped fiber amplifier EDFA as an example: PD1 is the input optical power detector, which is used to detect the optical power at the Input end, pump 1 and pump 2 are the two pumping sources of the EDFA, and PD2 is the output optical detector. Used to detect the optical power at the output port. The basic optical principle of the amplifier module is to make the amplifier module output the desired power by monitoring its input and output, so as to achieve the required gain. Based on the optical characteristics, since the light amplified by pump...
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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...
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IPC IPC(8): G02F1/39
CPCG02F1/395
Inventor 蔡飞张鹏彭莉马延峰张伟杨智余春平卜勤练徐红春
Owner GUANGXUN SCI & TECH WUHAN