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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 for long-term frequency locking of controlled semiconductor lasers using a confocal Fabry-Perot (FP) cavity and a stable He-Ne laser is reported: a stable He-Ne laser is used as a reference, And a high-pressure amplifier to scan the confocal FP cavity and inject the He-Ne laser and the controlled laser into the FP cavity to obtain the transmission peak signal of the He-Ne laser and the controlled laser and input the detected transmission peak signal to a data acquisition card , Programs written in LabVIEW software determine the position of all the peaks in the cavity and calculate the relative positions of He-Ne and controlled laser transmissions. Compared with the set value, the feedback voltage signal is generated so that the controlled laser frequency is stabilized at the set value, and the stability of the He-Ne laser is transferred to the controlled laser. With this method, the laser frequency of the semiconductor laser (DL100) is stabilized at a selected wave number of 11716.1706 cm -1, with an hourly frequency shift of less than ± 2 MHz.