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Proceedings Paper

Dual-frequency HeNe lasers of 3- to 40-MHz frequency difference
Author(s): Yan Li; Zhijun Fan; Shulian Zhang
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Paper Abstract

The Zeeman He-Ne dual frequency laser produces a frequency-difference less than 3.5 MHz and birefringent dual-frequency laser produces a frequency-difference larger than 40 MHz. This paper reports a new He-Ne dual-frequency laser of 3 MHz - 40 MHz frequency-difference which has been strongly anticipated for a long time in metrology. To obtain 3 MHz - 40 MHz frequency-difference, we found two successful ways that one is to separate the ordinary light (o-light) and extraordinary light (e-light) spatially, make them travel along different optical paths and interact with the Ne atoms in their own paths, and the other is to divide Ne atoms into two kinds by applying transverse magnetic field on birefringent dual-frequency laser, one kind only interact with o-light and the other only with e-light.

Paper Details

Date Published: 20 September 2002
PDF: 7 pages
Proc. SPIE 4919, Advanced Materials and Devices for Sensing and Imaging, (20 September 2002); doi: 10.1117/12.471879
Show Author Affiliations
Yan Li, Tsinghua Univ. (China)
Zhijun Fan, Tsinghua Univ. (China)
Shulian Zhang, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 4919:
Advanced Materials and Devices for Sensing and Imaging
Jianquan Yao; Yukihiro Ishii, Editor(s)

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