| 一种测量磁光阱中冷原子密度和温度的新方法 |
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| 引用本文： | 付军贤,李义民,陈徐宗,杨东海,王义遒.一种测量磁光阱中冷原子密度和温度的新方法[J].光学学报,2001,21(4):14-416. |
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| 作者姓名： | 付军贤 李义民 陈徐宗 杨东海 王义遒 |
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| 作者单位： | 北京大学电子学系, |
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| 基金项目： | 国家自然科学基金! (970 40 0 1)，教育部高等学校博士
点专项科研基金 |
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| 摘 要： | 报道了对磁光阱中冷铯原子吸收谱的实验观察，由于冷原子的多普勒增宽远小于激光发态超精细分裂，实验观察到三个孤立的吸收峰（Cs,6S1/2,F=4→6P3／2，F＝3，4，5，）其吸收系数比为3：7：12，这与相应跃迁振子强度一致。利用吸收信号测量了冷原子云的密度.结果与荧光探测法在10％的精度内符合；用吸收信号测量了冷原子的温度，测量结果与用荧光飞行时间法和释放捕捉法的结果吻合。
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| 关 键 词： | 磁光阱 吸收谱 冷原子 密度 温度 飞行时间谱 吸收信号 量子光学 |
A New Method for Measuring Density and Temperature of Cold Atoms in Magneto-Optical Trap |
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| Fu Junxian,Li Yimin,Chen Xuzong,YANG Donghai,WANG YiQiu.A New Method for Measuring Density and Temperature of Cold Atoms in Magneto-Optical Trap[J].Acta Optica Sinica,2001,21(4):14-416. |
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| Authors: | Fu Junxian Li Yimin Chen Xuzong YANG Donghai WANG YiQiu |
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| Abstract: | The experimental observation of the absorption spectrum of cold atoms in magneto-optical trap (MOT) was reported. Because the Doppler broadening of cold atoms in MOT is far less than the hyperfine structure splitting, three abosrption peaks (Cs,6S1/2,F=4→6P3/2,F=3,4,5) with a ratio of absorption coefficient of 3∶7∶12 were observed. The density of cold atoms was also measured by using absorption signal and the result agreed with fluorescence detecting method within 10% tolerance. The temperature of cold atoms measured using absorption method agreed well with that by fluorescence TOF method and release and recapture method. |
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| Keywords: | magneto-optical trap absorption spectrum cold atoms time of flight (TOF) |
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