注意：用于钠原子激光冷却的四程声光调制器系统。

Note: A four-pass acousto-optic modulator system for laser cooling of sodium atoms.

作者信息

Lu Bo, Wang Dajun

机构信息

Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, China.

出版信息

Rev Sci Instrum. 2017 Jul;88(7):076105. doi: 10.1063/1.4994223.

DOI:10.1063/1.4994223

PMID:28764500

Abstract

We present a four-pass acousto-optic modulator (AOM) system for providing the repumping light for laser cooling of sodium atoms. With only one 400 MHz AOM, we achieve a tunable laser frequency shift around 1.6 GHz with total efficiency up to 30%. This setup provides an alternative over conventional methods to generate a sodium repumping light using more expensive high frequency AOMs or electro-optical modulators (EOMs) in the GHz domain. This compact and reliable setup can be easily adapted to other frequencies and may find applications in laser spectroscopy, laser cooling and trapping, and coherent manipulation of atomic quantum states.

摘要

我们展示了一种用于为钠原子激光冷却提供再泵浦光的四程声光调制器（AOM）系统。仅使用一个400 MHz的AOM，我们实现了约1.6 GHz的可调谐激光频率偏移，总效率高达30%。此装置为传统方法提供了一种替代方案，传统方法是在GHz频段使用更昂贵的高频AOM或电光调制器（EOM）来产生钠再泵浦光。这种紧凑且可靠的装置可以很容易地适配到其他频率，并且可能在激光光谱学、激光冷却与俘获以及原子量子态的相干操纵中找到应用。