Saturated absorption spectroscopy of calcium in a hollow-cathode lamp
Saturated absorption spectroscopy of calcium in a hollow-cathode lamp
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DOI：
10.1088/0953-4075/42/16/165001
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发表时间：
2009-08
期刊：
影响因子：
--
通讯作者：
U. Dammalapati;I. Norris;E. Riis
中科院分区：
文献类型：
--
作者：
U. Dammalapati;I. Norris;E. Riis
本文报道了一种利用声光调制器输出的双泵浦光获得色散饱和吸收特性的方法。其中一个波束被调制器频移，从而允许所得信号的可变频率偏移。它们用于饱和灯的低密度蒸气中的原子跃迁。该技术的灵敏度是足够的，以观察清晰的信号，从同位素的钙未解决的不均匀的增宽和天然丰度小于0.2%。该技术用于偏移锁定钛：蓝宝石激光器的频率，用于激光冷却和捕获钙。
We report on a technique for obtaining dispersive saturated absorption features by two pump beams derived from an acousto-optic modulator. One of the beams is frequency shifted by the modulator allowing for a variable frequency offset of the resulting signal. They are used to saturate the atomic transition in the low-density vapour of the lamp. The sensitivity of the technique is sufficient to observe clear signals from isotopes of calcium unresolved by the inhomogeneous broadening and with natural abundances of less than 0.2%. The technique is used for offset locking the frequency of a Ti:Sapphire laser used for laser cooling and trapping of calcium.