数字伺服系统实现激光器频率长期锁定  

Long-Term Frequency Stabilization with Digital Servo System

作　　者：姬中华[1] 张冉冉[1] 马杰[1] 董磊[1] 赵延霆[1] 贾锁堂[1] 

机构地区：[1]山西大学物理电子工程学院量子光学与光量子器件国家重点实验室,山西太原030006

出　　处：《中国激光》2009年第4期804-808,共5页Chinese Journal of Lasers

基　　金：国家973计划(2006CB921603);国家自然科学基金(10574084;60678003);国家重大基础研究前期研究专项(2005CCA06300);国家基础科学人才培养基金(J0730317)资助项目

摘　　要：报道了一种用共焦法布里-珀罗(F-P)腔和稳定的He-Ne激光对受控半导体激光器进行长时间频率锁定的方法:稳定的He-Ne激光作为参考标准,通过信号发生器和高压放大器扫描共焦F-P腔,同时将He-Ne激光与受控激光注入F-P腔,得到He-Ne激光与受控激光的透射峰信号,将探测到的透射峰信号输入到数据采集卡中,用LabVIEW软件编写的程序可以确定扫描腔体时所有峰的位置,计算出He-Ne激光透射峰和受控激光透射峰的相对位置。与设定值比较,产生反馈电压信号使受控激光器频率稳定在设定值,将He-Ne激光的稳定性转移到受控激光上。利用此方法,实现了将半导体激光器(DL100)的激光频率稳定在所选择的波数为11716.1706 cm^(-1)的位置.一小时频率漂移小于±2 MHz。A method which stabilizes the frequency of the slave laser in long time by confocal F-P cavity and stabilized He-Ne laser is reported. A frequency-stabilized He-Ne laser is employed as a reference, He-Ne laser and slave laser are injected to confocal F-P cavity which is scanned by a signal generator and a high-voltage amplifier at the same time. The transmission peak signals which are detected by photodetectors are delivered to data acquisition card. A program using LabVIEW software can determine all peak positions and calculate the relative position of transmission peak signals of He-Ne laser and the slave laser. Feedback voltage is generated to make the relative position of He-Ne laser and the slave laser equal to setting values, then the stability of He-Ne laser is translated to the slave laser. Using this method, a laser diode （DL 100） is stabilized at wavenumber of 11716. 1706 cm^-1 and the frequency drift is less than ±2 MHz in one hour.

关 键 词：频率稳定 数字伺服系统 法布里-珀罗腔 参考频率标准 

分 类 号：TN248[电子电信—物理电子学]