Zi Fei, Wu Xuejian, Zhong Weicheng, Parker Richard H, Yu Chenghui, Budker Simon, Lu Xuanhui, Müller Holger
Appl Opt. 2017 Apr 1;56(10):2649-2652. doi: 10.1364/AO.56.002649.
We present a hybrid laser frequency stabilization method combining modulation transfer spectroscopy (MTS) and frequency modulation spectroscopy (FMS) for the cesium D transition. In a typical pump-probe setup, the error signal is a combination of the DC-coupled MTS error signal and the AC-coupled FMS error signal. This combines the long-term stability of the former with the high signal-to-noise ratio of the latter. In addition, we enhance the long-term frequency stability with laser intensity stabilization. By measuring the frequency difference between two independent hybrid spectroscopies, we investigate the short-and long-term stability. We find a long-term stability of 7.8 kHz characterized by a standard deviation of the beating frequency drift over the course of 10 h and a short-term stability of 1.9 kHz characterized by an Allan deviation of that at 2 s of integration time.
我们提出了一种结合调制转移光谱（MTS）和频率调制光谱（FMS）的混合激光频率稳定方法，用于铯D跃迁。在典型的泵浦-探测设置中，误差信号是直流耦合的MTS误差信号和交流耦合的FMS误差信号的组合。这将前者的长期稳定性与后者的高信噪比结合起来。此外，我们通过激光强度稳定来提高长期频率稳定性。通过测量两个独立的混合光谱之间的频率差，我们研究了短期和长期稳定性。我们发现长期稳定性为7.8 kHz，其特征是在10小时内拍频漂移的标准偏差，短期稳定性为1.9 kHz，其特征是在2秒积分时间的阿伦偏差。
