Acta Metrologica Sinica  2025, Vol. 46 Issue (2): 259-266    DOI: 10.3969/j.issn.1000-1158.2025.02.14
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Experimental Study on Calibration Method of Offsite Optical Frequency Comb
XI Wenfei1,2,3, MENG Fei2,3, LIN Baike2,3, SU Yabei4, XUE Xiaobo4, ZHAO Yao5, GAO Yesheng5, CAO Shiying2,3, LIN Yige2,3, LANG Liying1, FANG Zhanjun2,3
1.School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, China
2.Division of Time and Frequency Metrology, National Institute of Metrology, Beijing 100029, China
3.Key Laboratory of State Administration for Market Regulation (Time Frequency and Gravity Primary Standard) , Beijing 100029, China
4.Key Laboratory of Metrology and Calibration, Beijing Institute of Radio Measurement, Beijing 100854, China
5.The 41st Institute of China Electronics Technology Group Corporation, Qingdao, Shandong 266555, China
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Abstract  To achieve offsite calibration of optical frequency combs, a calibration method using a frequency-stabilized laser as a transfer standard was proposed and experimentally demonstrated. The experiment used a standard optical frequency comb in National Institute of Metrology to calibrate the mean frequency of the transfer laser to 194 369 489 387 885 Hz, with the relative expanded uncertainty of 1.03 × 10-13k=2), the average stability was 1.7×10-13@1 s. The experiment lasted one and a half years and involved several long-distance transports. On this basis, the experiment was calibrated by means of a transfer laser on two off-site optical frequency combs, respectively, in which the measured mean value of the optical frequency comb using a reference to the H-maser is 194 369 489 387 827 Hz, with the relative extended uncertainty of 3.2 × 10-13 k = 2), a calibration value of +58 Hz, and an average stability of 2.0 × 10-13@1s; The measured mean value of the optical frequency comb using a reference to Rubidium clock is 194 369 489 388 579 Hz, with the relative extended uncertainty of 5.8 × 10-11 k = 2), a calibrated value of -694 Hz, and an average stability of 4.5 × 10-12 @1s.The study provides a novel approach for remote calibration of optical frequency combs referenced to microwave frequency standards.
Key wordsmetrology      absolute frequency measurement      optical frequency comb      remote calibration      frequency stabilized laser      optical frequency standard     
Received: 02 January 2024      Published: 04 March 2025
PACS:  TB939  
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Articles by authors
XI Wenfei
MENG Fei
LIN Baike
SU Yabei
XUE Xiaobo
ZHAO Yao
GAO Yesheng
CAO Shiying
LIN Yige
LANG Liying
FANG Zhanjun
Cite this article:   
XI Wenfei,MENG Fei,LIN Baike, et al. Experimental Study on Calibration Method of Offsite Optical Frequency Comb[J]. Acta Metrologica Sinica, 2025, 46(2): 259-266.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2025.02.14     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2025/V46/I2/259
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