光通信探测器强激光光束下的输出功率控制研究

Study on the output power control of the optical communication detector under the strong laser beam

为了解决光通信探测器在强激光光束条件下探测精度低、输出功率控制时间长、鲁棒性和稳定性差的问题,提出了基于闭环系统的输出功率控制方法。分析光通信探测器原理,通过轴向功率密度分布改善探测器位置精度,并利用比特干扰增强探测器整体性能,采用管芯光强分布高斯模型,推算输出强激光光束二阶矩,获得光束束宽,得到可靠光束参数,提升探测器输出功率控制精度,依据自动控制原理,控制所有被包在负反馈环中的干扰作用,去除温度对输出功率的不良影响,实现探测器输出功率的精准控制。仿真实验表明,所提方法的平均输出功率控制时长仅为6.14 s,探测精度一直保持在97%左右,容错率高达90%,其运算速率较高,可有效提升输出功率稳定性和探测精度,在维护光通信的稳定运行方面,具备极强的鲁棒性及实用性。

In order to solve the problems of low detection accuracy,long output power control time,poor robustness and stability of optical communication detectors under the condition of strong laser beams,this paper proposes an output power control method based on a closed-loop system.Analyzing the principle of the optical communication detector to improve the position accuracy of the detector through axial power density distribution.Using bit interference to enhance the overall performance of the detector.Using the Gaussian model of the light intensity distribution of the die.Calculating the second moment of the output strong laser beam to obtain the beam width and to get reliable beam parameters.The output power control accuracy of the detector is improved.According to the automatic control principle,all the interference effects encased in the negative feedback loop are controlled,the adverse effects of temperature on the output power are removed,and accurate control of the detector output power are achieved.Simulation experiments show that the average output power control time of the proposed method is only 6.14 s,the detection accuracy has been maintained at about 97%,the fault tolerance rate is as high as 90%,and its calculation rate is high,which can effectively improve the output power stability and detection accuracy.It is extremely robust and practical in maintaining stable operation of optical communications.