Abstract

We propose a multi-color method for the self-correction of the air refractive index based on the dispersive interferometry of an optical frequency comb. This method can be applied to correct the air refractive index for long-distance measurements in moist air. Optical lengths of multiple wavelengths were obtained simultaneously by the dispersive interferometry of an optical frequency comb. Interferometric measurement results and calculations from the empirical equation of air refractive indices were similar, with a standard deviation of ${2.0} \times {{10}^{- 9}}$ throughout the 2 h continuous measurement period. By applying the multi-color method, correction of the air refractive index with an uncertainty of ${3.5} \times {{10}^{- 7}}$ was achieved.

© 2021 Optical Society of America

High-accuracy self-correction of refractive index of air using two-color interferometry of optical frequency combs

Kaoru Minoshima, Kaoru Arai, and Hajime Inaba
Opt. Express 19(27) 26095-26105 (2011)

Absolute distance measurement with correction of air refractive index by using two-color dispersive interferometry

Hanzhong Wu, Fumin Zhang, Tingyang Liu, Jianshuang Li, and Xinghua Qu
Opt. Express 24(21) 24361-24376 (2016)

Correction of the air refractive index using a two-color method for absolute distance measurement without a dead zone

Haoran Gao, Liandong Yu, Xin Xu, Xueying Jin, Yang Lu, Dian Bian, and Renhao Zheng
Appl. Opt. 60(5) 1241-1249 (2021)

Measurement of group refractive indices of glass using a color-selective multi-pulse generated with a spatial light modulator

Hisanari Takahashi, Koyo Watanabe, Kyohhei Shigematsu, Takashi Inoue, and Hiroshi Satozono
Opt. Lett. 46(7) 1534-1537 (2021)

Precision measurement of the refractive index of air with frequency combs

J. Zhang, Z. H. Lu, and L. J. Wang
Opt. Lett. 30(24) 3314-3316 (2005)