中国激光, 2014, 41 (7): 0715004, 网络出版: 2014-06-24   

铷原子4D5/2态双光子偏振光谱及其在1.5 μm激光稳频中的应用

Two-Photon Polarization Spectroscopy of Rubidium 4D5/2 State and Its Application for Frequency Stabilization of 1.5 μm Laser
作者单位
山西大学光电研究所量子光学与光量子器件国家重点实验室, 山西 太原 030006
摘要
介绍了基于87Rb原子5S1/2-5P3/2-4D5/2阶梯型能级系统中的双光子偏振光谱。与其他跃迁相比,循环跃迁的信噪比最好。研究了双光子偏振光谱循环跃迁线信号强度随抽运光光强的变化情况。利用双光子偏振光谱,将1529 nm半导体激光器的频率锁定于87Rb原子的5P3/2(F′=3)-4D5/2(F″=4)跃迁线上,当取样时间τ=100 s时阿仑方差最小,为σy(τ)=1.3×10-11。与自由运转相比,该方法显著地改善了1529 nm激光器长期频率稳定度。
Abstract
The two-photon polarization spectroscopy (TPPS) of 87Rb atoms is reported based on the 5S1/2-5P3/2-4D5/2 ladder-type atomic system. Compared with other transitions, the cycling transition shows much better signal-to-noise ratio. TPPS cycling transition signal versus intensity of the pumping laser is investigatived. The frequency of a 1529 nm laser diode is stabilized to the 5P3/2(F′=3)-4D5/2(F″=4) hyperfine transition of 87Rb atoms by using TPPS. The minimum value of Allan variance σy(τ) is 1.3×10-11 at the interrogation time τ of 100 s. Compared with the free-running case, this new method remarkably improves the long-term frequency stability of the 1529 nm laser.
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刘慧丰, 王杰, 杨光, 杨保东, 何军, 王军民. 铷原子4D5/2态双光子偏振光谱及其在1.5 μm激光稳频中的应用[J]. 中国激光, 2014, 41(7): 0715004. Liu Huifeng, Wang Jie, Yang Guang, Yang Baodong, He Jun, Wang Junmin. Two-Photon Polarization Spectroscopy of Rubidium 4D5/2 State and Its Application for Frequency Stabilization of 1.5 μm Laser[J]. Chinese Journal of Lasers, 2014, 41(7): 0715004.

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