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Proceedings Paper

Portable atomic frequency standard based on coherent population trapping
Author(s): Fan Shi; Renfu Yang; Feng Nian; Zhenwei Zhang; Yongshun Cui; Huan Zhao; Nuanrang Wang; Keming Feng
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Paper Abstract

In this work, a portable atomic frequency standard based on coherent population trapping is designed and demonstrated. To achieve a portable prototype, in the system, a single transverse mode 795nm VCSEL modulated by a 3.4GHz RF source is used as a pump laser which generates coherent light fields. The pump beams pass through a vapor cell containing atom gas and buffer gas. This vapor cell is surrounded by a magnetic shield and placed inside a solenoid which applies a longitudinal magnetic field to lift the Zeeman energy levels’ degeneracy and to separate the resonance signal, which has no first-order magnetic field dependence, from the field-dependent resonances. The electrical control system comprises two control loops. The first one locks the laser wavelength to the minimum of the absorption spectrum; the second one locks the modulation frequency and output standard frequency. Furthermore, we designed the micro physical package and realized the locking of a coherent population trapping atomic frequency standard portable prototype successfully. The short-term frequency stability of the whole system is measured to be 6×10−11 for averaging times of 1s, and reaches 5×10−12 at an averaging time of 1000s.

Paper Details

Date Published: 4 May 2015
PDF: 8 pages
Proc. SPIE 9543, Third International Symposium on Laser Interaction with Matter, 95431R (4 May 2015); doi: 10.1117/12.2180549
Show Author Affiliations
Fan Shi, Science and Technology on Metrology and Calibration Key Lab. (China)
Beijing Institute of Radio Metrology and Measurement (China)
Renfu Yang, Science and Technology on Metrology and Calibration Key Lab. (China)
Beijing Institute of Radio Metrology and Measurement (China)
Feng Nian, Science and Technology on Metrology and Calibration Key Lab. (China)
Beijing Institute of Radio Metrology and Measurement (China)
Zhenwei Zhang, Science and Technology on Metrology and Calibration Key Lab. (China)
Beijing Institute of Radio Metrology and Measurement (China)
Yongshun Cui, Science and Technology on Metrology and Calibration Key Lab. (China)
Beijing Institute of Radio Metrology and Measurement (China)
Huan Zhao, Science and Technology on Metrology and Calibration Key Lab. (China)
Beijing Institute of Radio Metrology and Measurement (China)
Nuanrang Wang, Science and Technology on Metrology and Calibration Key Lab. (China)
Beijing Institute of Radio Metrology and Measurement (China)
Keming Feng, Science and Technology on Metrology and Calibration Key Lab. (China)
Beijing Institute of Radio Metrology and Measurement (China)


Published in SPIE Proceedings Vol. 9543:
Third International Symposium on Laser Interaction with Matter
Yury M. Andreev; Zunqi Lin; Xiaowu Ni; Xisheng Ye, Editor(s)

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