Acta Metrologica Sinica  2019, Vol. 40 Issue (5): 749-754    DOI: 10.3969/j.issn.1000-1158.2019.05.01
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Precision Measurement of Microwave Power Using Rydberg Atoms
ZHANG Jie1,2,SONG Zhen-fei2,LI Jun1,ZOU Hai-yang2,3,ZHANG Wan-feng2,LIU Zheng2
1. China Jiliang University, Hangzhou, Zhejiang 310018, China
2. National Institute of Metrology,Beijing 100029, China
3. Southeast University, Nanjing, Jiangsu 210009, China
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Abstract  A new power measurement method based on the quantum coherence effect of Rydberg atoms is proposed. The low electromagnetic perturbation atomic vapor cell containing rubidium vapor is placed in the specific waveguide system. Based on Rydberg atomic quantum coherence effect, the guided wave electric field measurement is transformed into the detection of atomic absorption spectroscopy. A completely new microwave power measurement traceable to Planck constant and frequency measurement is realized by using the analytic quantization relationship between the power and the guided wave electric field. Compared with traditional power measurement at the frequency of 10.22GHz, the average deviation from -40dBm to -20dBm is 0.08dB (1.86%). The new microwave power quantum measurement method has the advantages of high sensitivity, large dynamic range and small measurement uncertainty. It is expected to form a new generation of microwave power standard that can lead to a direct SI-traceable approach for power metrology.
Key wordsmetrology      microwave power      Rydberg atoms      quantum sensing      atomic vapor cell     
Received: 23 May 2019      Published: 01 September 2019
PACS:  TB973  
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ZHANG Jie
SONG Zhen-fei
LI Jun
ZOU Hai-yang
ZHANG Wan-feng
LIU Zheng
Cite this article:   
ZHANG Jie,SONG Zhen-fei,LI Jun, et al. Precision Measurement of Microwave Power Using Rydberg Atoms[J]. Acta Metrologica Sinica, 2019, 40(5): 749-754.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2019.05.01     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2019/V40/I5/749
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