Acta Scientiarum Naturalium Universitatis Pekinensis

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Experimental Test of the Isotropy of Two-way Speed of Light

CHEN Shaoguang1, LIU Baocheng2, YI Heling3, CHEN Fu4, HU Kexin5, LU Qihu6, YI Sunsheng7, PENG Wenhao8, ZOU Wendong9, ZHU Yubin10   

  1. 1Institute of Energy Resources, Jiangxi Academy of Sciences, Nanchang, 330029; 2Department of Geophysics, Peking University, Beijing, 100871; 3Department of Physics, Texas University Austin, Tx78751, USA; 4Jiangxi Nanchang 11th Middle School, Nanchang, 330008; 5Institute of Acoustics, Academia Sinica, Beijing, 100080; 6Institute of Geophysics, SSB, Beijing, 100081; 7Institute of Physics, Academia Sinica, Beijing, 100081; 8Institute of Measurement, Jiangxi, Yi Chun Prefecture, Yi Chun, 336000; 9Institute of Application Physics, Jiangxi Academy of Sciences, Nanchang, 330029; 10Institute of Acoustics, Academia Sinica, Beijing, 100080
  • Received:1996-09-13 Online:1997-09-20 Published:1997-09-20

双向平均光速各向同性的实验检验

陈绍光1, 刘宝诚2, 易鹤龄3, 陈赋4, 胡可心5, 陆其鹄<6, 易孙圣7, 彭文豪8, 邹文栋9, 祝裕斌10   

  1. 1江西省科学院能源所,南昌,330029; 2北京大学地球物理系, 北京, 100871; 3Texas大学物理系, Austin, TX78751, USA; 4江西南昌十一中, 南昌, 330008; 5中科院声学所,北京,100080; 6国家地震局地球物理研究所, 北京, 100081; 7中科院物理所, 北京, 100080; 8江西宜春地区计量所, 宜春, 336000; 9江西省科学院应用物理研究所, 南昌, 330029; 10中科院声学所, 北京, 100080

Abstract: By means of the common mode restraint technique the error caused by the frequency instability of laser has been decreased to the level of 2×10-20 in Δv/v. By means of the heterodyne frequency shift technique and the computer storage technique the sensitivity of beat frequency achieved 1×10-4Hz. In our experiment the isotropy of two-way speed of light has been proved at the level of 1×10-18 in Δc/c, which represents a 2500-fold improvement on the previous best measurement given by Brillet and Hall.

Key words: two-way speed of light, common mode restraint of laser beat-frequency, heterodyne frequency shift

摘要: 用抗共模干扰的激光拍频法使激光器频率不稳定引起的拍频误差减小到ΔVV<2×10-20。用外差移频技术实现周期的细分,再辅以微机存贮技术使频率差分辨率达到1×10-4Hz。实验检验双向平均光速各向同性达到ΔC/C<1×10-18的精度。这一实验结果比国外最高的检验精度ΔC/C≤2.5×10-15高出了2500倍。

关键词: 双向平均光速, 抗共模干扰激光拍频, 外差移频

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