钠D1线Hanle效应中有损耗的相干布居俘获
Coherent Population Trapping with Losses on the Sodium D1 Line Hanle Effect
摘要：
研究了热钠原子束中的相干布居数囚禁现象。我们比较了不同的相干布居捕获方案，可以建立在D1线上使用塞曼子能级的一个给定的地面超精细状态。相干布居俘获制备检查通过Hanle效应配置。研究了在激发跃迁外的超精细能级中存在光抽运时相干布居俘获现象的效率。结果表明，当光抽运率增加时，相干布居数陷阱共振的对比度和宽度都大大减小。在实验中，由于光泵浦的损失率已被控制的可变强度的激光再泵浦的装置。
英文摘要：
We consider the coherent population trapping phenomenon in a thermal sodium atomic beam. We compare the different coherent population trapping schemes that can be established on the D1 line using the Zeeman sublevels of a given ground hyperfine state. The coherent population trapping preparation is examined by means of a Hanle effect configuration. The efficiency of the coherent population trapping phenomenon has been examined in presence of optical pumping into hyperfine levels external to those of the excited transition. We show that both the contrast and the width of the coherent population trapping resonance strongly decrease when the optical pumping rate is increased. In the experiment, the loss rate due to optical pumping has been controlled by means of a laser repump of variable intensity.
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