摘要
半导体激光器在原子干涉仪、原子钟、精密测量等领域应用日趋广泛,而其输出光频率易受外界环境温度等影响发生偏移。分析了利用塞曼效应锁定半导体激光器频率的原理,搭建的锁频实验系统中选用Newfocus(TLB-6017,853 nm)可调谐激光器、铯原子注入气室。调节外加磁场大小的同时监测铯原子超精细能级分裂情况,找到适合锁频的铯原子D2线F=4→F′=5吸收峰,经过多次闭环测试,验证了该稳频系统的可靠性,稳定度较高,且系统简单易操作,一小时内激光稳定度为28 MHz,短期激光稳定度为18 MHz。
The semiconductor laser is widely used in atomic interferometers, atomic clocks, and precision measurement, but its output light frequency is easily offset by environment temperature.In this paper, the principle of frequency locking based on Zeeman effect is analyzed.The tunable laser Newfocus(TLB-6017,853 nm) and the cesium injection chamber are used to establish an experimental frequency locking system.The ultra-fine level splitting of cesium atom is monitored by adjusting the applied magnetic field, and the frequency-locking absorption peak F=4→F′=5 of cesium atom D2 line is found.The reliability and stability of the frequency locking system are verified through repeated closed-loop tests.The system is easy to operate, the laser stability within one hour is 28 MHz, and the short-term laser stability is 18 MHz.
出处
《现代机械》
2021年第4期42-45,共4页
Modern Machinery
基金
福建水利电力职业技术学院教育科研项目(YJKJ2001C)。
关键词
半导体激光器
锁频
塞曼效应
稳定度
semiconductor laser
frequency locking
Zeeman effect
stability
