基于铯原子D2线光抽运光谱的半导体激光器偏频锁定  

Laser Frequency Offset Locking with Optical Pumping Spectrum in D2 Line of Cesium

作　　者：李乾勇[1] 卢佳佳[1] 胡海燕[1] 王彦华[1] 卫栋[1] 

机构地区：[1]山西大学物理电子工程学院,山西太原030006

出　　处：《中国激光》2010年第12期2969-2974,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(60978017);高等学校博士学科点专项科研基金(20070108003);国家基础科学人才培养基金(J0730317)资助课题

摘　　要：通过探测在连续调谐抽运光作用下的气室对频率确定的探测光的吸收,可获得光抽运光谱,探测光和抽运光同时耦合不同的超精细跃迁时可形成光抽运光谱的峰值,此时两个光场有确定的稳定性依赖于原子能级的频率差。利用光抽运光谱并结合锁频环路,完成了参考频率为原子超精细分裂的连续半导体激光器间的偏频锁定。通过选择不同的超精细能级,两个激光器输出激光的频率偏移可以锁定在数百兆赫兹的激发态超精细能级间隔或约9 GHz的基态能级间隔附近。Using a pump laser coupling the hyperfine transition of D2 line in a cesium cell,the optical pumping spectra are demonstrated by detecting the absorption of the co-propagational probe beam with the identified frequency.The peaks or dips are related to the optical pumping where the pump laser and probe laser coupling different hyperfine transitions with a frequency difference.Employing a locking loop and the optical pumping spectrum,a scheme for frequency offset locking of two diode lasers with the reference frequency based on the hyperfine splitting is presented.The frequency offsets can be the intervals between the hyperfine levels of the 62P3/2 excited states or the 62S1/2 ground states from hundreds megahertz to 9 GHz.

关 键 词：激光技术 偏频锁定 光抽运光谱 铯原子 

分 类 号：TN248.4[电子电信—物理电子学]