中国物理B ›› 2009, Vol. 18 ›› Issue (4): 1409-1412.doi: 10.1088/1674-1056/18/4/021

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A diode laser spectrometer at 634nm and absolute frequency measurements using optical frequency comb

伊林, 袁杰, 齐向晖, 陈文兰, 周大伟, 周通, 周小计, 陈徐宗   

  1. School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
  • 收稿日期:2008-08-13 修回日期:2008-09-10 出版日期:2009-04-20 发布日期:2009-04-20
  • 基金资助:
    Project supported by the National Fundamental Research Program of China (Grant Nos 2005CB3724500 and 2006CB921400), the Major Program of National Natural Science Foundation of China (Grant No 60490280), National Natural Science Foundation of China (Grant

A diode laser spectrometer at 634nm and absolute frequency measurements using optical frequency comb

Yi Lin(伊林), Yuan Jie(袁杰), Qi Xiang-Hui(齐向晖), Chen Wen-Lan(陈文兰), Zhou Da-Wei(周大伟), Zhou Tong(周通), Zhou Xiao-Ji(周小计), and Chen Xu-Zong(陈徐宗)†   

  1. School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China
  • Received:2008-08-13 Revised:2008-09-10 Online:2009-04-20 Published:2009-04-20
  • Supported by:
    Project supported by the National Fundamental Research Program of China (Grant Nos 2005CB3724500 and 2006CB921400), the Major Program of National Natural Science Foundation of China (Grant No 60490280), National Natural Science Foundation of China (Grant

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摘要： This paper reports that two identical external-cavity-diode-laser (ECDL) based spectrometers are constructed at 634 nm referencing on the hyperfine B-X transition R(80)8-4 of 127I2. The lasers are stabilized on the Doppler-free absorption signals using the third-harmonic detection technique. The instability of the stabilized laser is measured to be 2.8×10-12 (after 1000 s) by counting the beat note between the two lasers. The absolute optical frequency of the transition is, for the first time, determined to be 472851936189.5 kHz by using an optical frequency comb referenced on the microwave caesium atomic clock. The uncertainty of the measurement is less than 4.9 kHz.

关键词: frequency standard, optical frequency comb, absolute frequency measurement, atomic clock

Abstract: This paper reports that two identical external-cavity-diode-laser (ECDL) based spectrometers are constructed at 634 nm referencing on the hyperfine B-X transition R(80)8-4 of 127I2. The lasers are stabilized on the Doppler-free absorption signals using the third-harmonic detection technique. The instability of the stabilized laser is measured to be 2.8×10-12 (after 1000 s) by counting the beat note between the two lasers. The absolute optical frequency of the transition is, for the first time, determined to be 472851936189.5 kHz by using an optical frequency comb referenced on the microwave caesium atomic clock. The uncertainty of the measurement is less than 4.9 kHz.

Key words: frequency standard, optical frequency comb, absolute frequency measurement, atomic clock

中图分类号:  (Semiconductor lasers; laser diodes)

  • 42.55.Px
07.60.Rd (Visible and ultraviolet spectrometers) 42.60.By (Design of specific laser systems) 42.79.-e (Optical elements, devices, and systems) 06.30.Ft (Time and frequency)