基于自动功率控制的EDFA泵浦驱动设计

EDFA Pump Driver Design Based on Automatic Power Control

摘要:

为满足空间光通信系统对掺饵光纤放大器(EDFA)高增益高稳定性的应用需求,采用级联泵浦结构,设计了一种自动功率控制的 EDFA 泵浦驱动电路。利用模拟比例-积分-微分(PID)控制器和基于对数放大器的高精度功率监测电路对驱动电路进行闭环控制,实现光放大信号的恒功率稳定输出。试验结果表明:利用该系统可以控制 EDFA 实现 33dBm 以上的恒定光功率输出,功率稳定度在1%以内,且光谱特性良好。

Abstract:

In order to meet the application requirements of space optical communicationfor high gain and high stability of erbium-doped fiber amplifier (EDFA), a pump drivingcircuit with automatic power control is proposed based on cascade structure. The analogproportion integration differentiation (PID) controller and high precision power monitoringcircuit based on logarithmic amplifier are used to control the pump driving circuit in a closedloop, and the constant power output of optical signal is obtained, The experimental resultsshow that the system can achieve constant optical power output of more than 33 dBm withgood spectral characteristics, and the power stability error is less than 1%.