基于精密波长计的外腔半导体激光长期稳频系统

J4 ›› 2017, Vol. 34 ›› Issue (4): 432-435.

基于精密波长计的外腔半导体激光长期稳频系统

李敏,张勇,彭文翠,童昕

1中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室，湖北武汉 430071； 2 中国科学院武汉物理与数学研究所，中国科学院原子频标重点实验室，湖北武汉 430071； 3中国科学院大学，北京 100049

收稿日期:2016-05-23 修回日期:2016-07-13 出版日期:2017-07-28 发布日期:2017-08-29

Long-term frequency stabilization system of external cavity diode laser based on precision wavelength meter

Received:2016-05-23 Revised:2016-07-13 Published:2017-07-28 Online:2017-08-29

摘要/Abstract

摘要： 为了抑制连续激光器的长期漂移，以精密波长计为参考频率标准，采用计算机控制的方法，可实现连续激光无调制稳频。此方法通过计算机获取波长计数据，利用数字PID计算出输出给激光器的反馈电压值，修正激光器腔长，从而实现激光器频率的锁定。此方法可用于目前商业激光器任意波长，且能在激光器频率可调节范围内任意频率点进行锁定。用该方法实现了对631nm半导体激光器的锁定，获得一小时频率不确定度为7.4MHz、频率长期漂移率为±1.1MHz/hour的稳定锁定。

Abstract: To reduce the long-term frequency drift, CW laser modulation free frequency stabilization is realized based on precision wavelength meter by means of computer control. In order to lock the laser’s frequency, the computer extracts the data from wavelength meter, then calculates the feedback voltage with PID algorithm to adjust the cavity length. This simple method can be applied to any given wavelength within spectral range of a commercially available laser, and can lock the laser to any absolute frequency within its tunable range. Using this method, a 631nm external cavity diode laser was stabilized with frequency bandwidth is 7.4 MHz for an hour, and long-term frequency drift is measured to be.

Key words: long-term drift

李敏张勇彭文翠童昕. 基于精密波长计的外腔半导体激光长期稳频系统[J]. J4, 2017, 34(4): 432-435.

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