Dual-frequency HeNe lasers of 3- to 40-MHz frequency difference

Yan Li; Zhijun Fan; Shulian Zhang

doi:10.1117/12.471879

20 September 2002 Dual-frequency HeNe lasers of 3MHz - 40MHz frequency-difference

Yan Li, Zhijun Fan, Shulian Zhang

Proceedings Volume 4919, Advanced Materials and Devices for Sensing and Imaging; (2002) https://doi.org/10.1117/12.471879
Event: Photonics Asia, 2002, Shanghai, China

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.

Citation Download Citation

Yan Li, Zhijun Fan, and Shulian Zhang "Dual-frequency HeNe lasers of 3MHz - 40MHz frequency-difference", Proc. SPIE 4919, Advanced Materials and Devices for Sensing and Imaging, (20 September 2002); https://doi.org/10.1117/12.471879

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