长期连续工作的光抽运铯束频标激光系统

长期连续工作的轻便激光系统是实现实用的光抽运铯束频标的关键。本文作者研制的半导体激光系统采用了单片机数字辅助锁定和计算机控制技术成功地实现了激光频率的自动锁定和长期连续工作。两套激光系统分别工作在抽运跃迁频率和检测跃迁频率上,与小型密封铯束管及频标电路共同组装成一台光抽运铯束频标。这台频标已经正常连续工作了两年多。技术指标达到原HP5061小铯钟的水平。据知,这是我国第一台能够长期连续工作的光抽运小铯钟,也是世界上第一台连续工作两年多的光抽运小铯钟。

A Long Term Continually Running Laser System for Optically Pumped Cesium Beam Frequency Standard

A portable laser system,continually working for very long period,is the key part in realization of an optically pumped cesium beam frequency standard.Our laser system,using semiconductor laser di- ode with microprocessor digital auxiliary lock and computer control techniques,could be automatically locked to a preset frequency and continually locked there for long period.Two sets of the laser system, working on pumping frequency and probing frequency respectively,are installed together with a cesium beam tube and a frequency control electronics set,forming a set of optically pumped cesium beam fre- quency standard.This frequency standard has been continually working for more than 2 years and its accuracy and stability are at the same level as the HP 5061 cesium beam frequency standard.To our knowledge,this frequency standard is the first set of Chinese-made small cesium beam frequency stan- dard,having continually worked for more than two years,and it is also the first set of optically pumped small cesium beam frequency standard having continually worked for more than two years in the world.