智能双纵模激光稳频系统的研究

为同时满足双纵模氦氖激光器的稳频精度和响应速度要求,提出一种嵌入式智能控制激光稳频系统。以AT89S52为核心,整个系统通过控制激光管的电流大小以改变激光管谐振腔腔长,从而达到稳频的目的;并基于分段式PID控制算法实现了稳频系统的软件开发。经试验证实:该系统满足设计要求,稳频精度保持在10-8以内;在外界强干扰情况下,恢复原来的状态后,激光器在30s内也可以重新稳住。与以往传统的PID控制系统相比较,该系统大大提高了抗干扰能力和响应速度。

Study on intelligent system for frequency-stabilized laser with double-longitudinal mode

In order to meet the systematical requirements of frequency-stabilized laser with double-longitudinal mode in frequency precision and response speed,a laser frequency stabilization system under embedded intelligent control was proposed.The whole completed system,based on AT89S52,can stabilize laser frequencies by controlling the current of the laser tube,as well as the length of its resonant cavity.The software was accomplished on the basis of segmented PID algorithm.Testing results show the frequency stabilization can meet design requirements with an accuracy maintaining at 10-8.When a strong interference occurs,the system can restore to original state within 30 seconds.Compared with the previous PID control system,this system is greatly improved in anti-interference ability and response speed as well.