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Chin. Phys. B, 2022, Vol. 31(6): 064206    DOI: 10.1088/1674-1056/ac4905

Generation of stable and tunable optical frequency linked to a radio frequency by use of a high finesse cavity and its application in absorption spectroscopy

Yueting Zhou(周月婷)1,2, Gang Zhao(赵刚)1,2,†, Jianxin Liu(刘建鑫)1,2, Xiaojuan Yan(闫晓娟)1,2, Zhixin Li(李志新)1,2, Weiguang Ma(马维光)1,2,‡, and Suotang Jia(贾锁堂)1,2
1 State Key Laboratory of Quantum Optics&Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
Abstract  The laser frequency could be linked to an radio frequency through an external cavity by the combination of Pound-Drever-Hall and Devoe-Brewer locking techniques. A stable and tunable optical frequency at wavelength of 1.5 μm obtained by a cavity with high finesse of 96000 and a fiber laser has been demonstrated, calibrated by a commercial optical frequency comb. The locking performances have been analyzed by in-loop and out-loop noises, indicating that the absolute frequency instability could be down to 50 kHz over 1 s and keep to less than 110 kHz over 2.5 h. Then, the application of this stabilized laser to the direct absorption spectroscopy has been performed. With the help of balanced detection, the detection sensitivity, in terms of optical density, can reach to 9.4×10-6.
Keywords:  optical frequency stabilization      spectral measurement      direct absorption spectroscopy  
Received:  10 November 2021      Revised:  29 December 2021      Accepted manuscript online:  07 January 2022
PACS:  42.62.Fi (Laser spectroscopy)  
  82.80.Dx (Analytical methods involving electronic spectroscopy)  
  06.20.fb (Standards and calibration)  
  42.79.Gn (Optical waveguides and couplers)  
Fund: Project supported by the National Key R&D Program of China (Grant No. 2017YFA0304203), the National Natural Science Foundation of China (Grant Nos. 61875107, 61905136, 61905134, 62175139), Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi, China (Grant No. 2019L0062), Opening Foundation of Key Laboratory of Laser & Infrared System (Shandong University).
Corresponding Authors:  Gang Zhao, Weiguang Ma     E-mail:;

Cite this article: 

Yueting Zhou(周月婷), Gang Zhao(赵刚), Jianxin Liu(刘建鑫), Xiaojuan Yan(闫晓娟), Zhixin Li(李志新), Weiguang Ma(马维光), and Suotang Jia(贾锁堂) Generation of stable and tunable optical frequency linked to a radio frequency by use of a high finesse cavity and its application in absorption spectroscopy 2022 Chin. Phys. B 31 064206

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