Chin. Phys. Lett.  2015, Vol. 32 Issue (5): 054206    DOI: 10.1088/0256-307X/32/5/054206
FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
Improvement of Laser Frequency Stabilization for the Optical Pumping Cesium Beam Standard
WANG Qing**, DUAN Jun, QI Xiang-Hui, ZHANG Yin, CHEN Xu-Zong
School of Electronics Engineering and Computer Science, Peking University, Beijing 100871
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WANG Qing, DUAN Jun, QI Xiang-Hui et al  2015 Chin. Phys. Lett. 32 054206
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Abstract A method is presented to improve the laser frequency stabilization for the optical pumping cesium clock. By comparing the laser frequency stabilization of different schemes, we verify that the light angle is an important factor that limits the long-term frequency stability. We minimize the drift of the light angle by using a fiber-coupled output, and lock the frequency of a distributed-feedback diode laser to the fluorescence spectrum of the atomic beam. The measured frequency stability is about 3.5 ×10?11 at 1 s and reaches 1.5 ×10?12 at 2000 s. The Allan variance keeps going down for up to thousands of seconds, indicating that the medium- and long-term stability of the laser frequency is significantly improved and perfectly fulfills the requirement for the optical pumping cesium clock.
Received: 11 November 2014      Published: 01 June 2015
PACS:  42.62.Fi (Laser spectroscopy)  
  42.72.-g (Optical sources and standards)  
  06.30.Ft (Time and frequency)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/32/5/054206       OR      https://cpl.iphy.ac.cn/Y2015/V32/I5/054206
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Articles by authors
WANG Qing
DUAN Jun
QI Xiang-Hui
ZHANG Yin
CHEN Xu-Zong
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