1 中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室, 湖北 武汉 430071
2 中国科学院冷原子物理中心, 湖北 武汉 430071
3 中国科学院大学, 北京 100049
提出了基于拉曼泵浦-探测技术得到的原子吸收谱线获取冷原子温度的方案,并将其应 用于85Rb原子磁光阱中。实验中,原子在囚禁光和探测光的共同作用下发生受激拉曼跃迁,产生 亚自然线宽的类色散峰,通过把该类色散峰与理论模型进行拟合估算出被囚禁85Rb冷原子团的温 度为230 μK。相对于飞行时间测温法,该方案提供了一种简捷的测量冷原子温度的方法。
原子光学 冷原子温度 泵浦-探测光谱 磁光阱 多普勒展宽 atomic optics cold atom temperature pump-probe spectroscopy magneto-optical trap Doppler broadening
Author Affiliations
Abstract
1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China
2 Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China
3 Graduate University of the Chinese Academy of Sciences, Beijing 100049, China
By using Faraday optical filter combined with four-wave mixing (FWM) amplifier, a narrow bandwidth optical amplifying atomic filter with switchable dual-passband is demonstrated experimentally. The two transmission peaks of the filter correspond to the Stokes and anti-Stokes frequencies, exhibiting a Raman gain in 13- and 17-fold, respectively, with bandwidth of ?120 MHz. By properly setting pump laser detuning, switching between filter passbands is realized. We also investigate the dependence of peak transmission on both pump laser intensity and Rb cell temperature. This atomic filter can find practical applications in long-distance laser communications and laser remote-sensing systems.
原子滤光器 窄带 四波混频放大器 可切换 140.0140 Lasers and laser optics 190.0190 Nonlinear optics 300.0300 Spectroscopy Chinese Optics Letters
2011, 9(2): 021405
