基于Rb87的调制转移光谱稳定激光器频率的方法  

Method for Modulating Transfer Spectrally Stabilized Laser Frequency Based on Rb

作　　者：栾广建 毛海岑[1] 石晓辉 LUAN Guang-jian;MAO Hai-cen;SHI Xiao-hui(Huazhong Institute of Electro-Optics-Wuhan National Laboratory of Optoelectronics,Wuhan 430223,China)

机构地区：[1]华中光电技术研究所-武汉光电国家研究中心,湖北武汉430223

出　　处：《光学与光电技术》2020年第2期83-86,共4页Optics & Optoelectronic Technology

摘　　要：冷原子干涉仪的原子冷却与囚禁过程对于激光的线宽、频率的准确性和稳定性有很高的要求。为获得满足实验需求的780 nm激光束,利用Rb87原子D2线的精细谱线5S1/2,F=1→5P3/2,F=3作为频率参考谱线,用调制转移稳频方法(MTS),获得无Doppler背景的调制转移光谱。在实验中利用这个光谱信号作为误差信号可以将激光器频率稳定在铷原子参考频率上长达20 h,线宽在136 kHz,频率稳定度在8.5×10-12(0.1 s),满足实验室冷原子干涉实验的要求。The atomic cooling and trapping process of the cold atom interferometer has high requirements on the linewidth of the laser.In order to obtain a 780 nm laser beam that meets the experimental requirements,the fine spectral lines 5S1/2,F=1→5 P3/2,F=3 of the Rb87’s D2 line are used as frequency reference,and the modulation transfer frequency stabilization(MTS)method obtains a modulation transfer spectrum without the Doppler background.In the experiment,using this spectral signal as the error signal can stabilize the laser frequency at the rubidium atom reference frequency for up to 20 hours,and the linewidth is enough to meet the requirements of laser cooling atom experiments.

关 键 词：原子光学 激光稳频 调制转移光谱学 四波混频 冷原子干涉仪 

分 类 号：TN24[电子电信—物理电子学]