一种简易的激光冷却和俘获^(87)Rb原子的实验系统

A Simple Experiment System for Laser Cooling and Trapping ^(87)Rb Atom

介绍了一套用于Rb原子的冷却和俘获的实验装置。采用注入锁定技术,获得了波长为780nm(单频,频率波动<2MHz,频率调谐范围4.5GHz)、输出功率为60mW的冷却光。通过在饱和吸收上加磁场的方法,实现了冷却光的偏频(10MHz)负失谐锁定;采用磁光阱系统,实现了原子的冷却和俘获。

In this paper, a simple setup of laser cooling and trapping of Rb atom is presented. By using the technique of injection locking, we have gained the cooling and trapping laser whose wavelength is 780 nm (single frequency, frequency fluctuation <2 MHz , tunable range～4.5 GHz), and output power is about 60 mW. With applying a magnetic field to the saturated absorption spectrum, the trapping laser frequency which is detuned a desired amount via Zeeman effect is locked. The cooling and trapping of Rb atom is obtained in the MOT.