异地光频梳校准方法实验研究

doi:10.3969/j.issn.1000-1158.2025.02.14

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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^-13 （k=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 words： metrology absolute frequency measurement optical frequency comb remote calibration frequency stabilized laser optical frequency standard

Received: 02 January 2024 Published: 04 March 2025

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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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