一种基于温度轨迹控制的塞曼稳频激光器预热方法(英文)  

Preheating method for frequency stabilized Zeman He-Ne laser based on temperature trajectory control

作　　者：胡鹏程[1] 谭久彬[1] 闫磊[1] 付海金[1] 

机构地区：[1]哈尔滨工业大学超精密光电仪器工程研究所,黑龙江哈尔滨150080

出　　处：《光学精密工程》2008年第6期1009-1017,共9页Optics and Precision Engineering

基　　金：Heilongjiang Province Program of Science and Technology Development of(No.GC04A515)

摘　　要：提出了一种新的基于预热温度轨迹规划和轨迹跟踪的塞曼稳频激光器预热控制方法。根据纵向塞曼激光器稳频控制过程的特点，规划了预热过程中谐振腔的一阶指数温度轨迹，以在不同温度环境下兼顾预热效率和稳频效果。采用预测函数控制（PFC）算法，通过预测输出的滚动优化和反馈校正，使激光器谐振腔温度精确跟踪规划轨迹上升直至逼近预设温度阈值θset。最后，建立纵向塞曼激光器预热及稳频控制系统，在不同环境温度下对本文预热方法进行实验验证。实验结果表明，在15～25℃内，基于本文控制方法的稳频系统可在16min内完成预热和激光频率锁定，且不同环境温度下的锁定温度变化范围〈0．4℃，相应的中心频率环境温度漂移〈0．25MHz（相对漂移0．5×10^-9）。该方法为提高稳频系统的预热效率和稳频效果提供了一种新的技术途径。In order to stabilize the Zeeman laser accurately within a short period at different ambient temperatures,a preheating method was proposed based on temperature trajectory planning and tracing. The structure of Zeeman-stabilized laser and the basic principle of frequency stabilization were discussed. Then, the tube temperature trajectory was planned as a modified exponential function of preheating time to expedite frequency locking and to improve laser frequency stability,and the Predictive Functional Control（PFC） arithmetic was employed to force the tube temperature to rise along the planned trajectory precisely. Finally, the several experiments were carried out to prove the effectiveness of the proposed preheating method. The experimental results indicate that the Zeeman laser using the proposed method can be preheated effectively at ambient temperature of 15-25 ℃,and the laser frequency can be locked in 16 min with a temperature-dependent frequency drift below 0.25 MHz. The proposed method can satisfy the requirements for improving preheating speed and frequency stability for Zeeman-stabilized lasers.

关 键 词：温度轨迹控制 预热 稳频 塞曼激光器 

分 类 号：TN248.7[电子电信—物理电子学]