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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 25 — Sep. 1, 2012
  • pp: 6084–6088

Frequency stabilization of internal-mirror He–Ne lasers by air cooling

Jin Qian, Zhongyou Liu, Chunying Shi, Xiuying Liu, Jianbo Wang, Cong Yin, and Shan Cai  »View Author Affiliations

Applied Optics, Vol. 51, Issue 25, pp. 6084-6088 (2012)

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Instead of the traditional heating method, the cavity length of an internal-mirror He–Ne laser is controlled by air cooling which is implemented by a mini cooling fan. The responsive property of the cooling fan and the thermal expansion of the internal-mirror laser tube are investigated. According to these investigations, a controlling system is designed to drive the cooling fan controlling the cavity length of the laser. Then the frequency is stabilized by comparing the light intensities of two operating longitudinal modes. The results of beating with an iodine stabilized He–Ne laser show that a relative uncertainty (Δf/f) of 4.3×109 in 5 months, a frequency fluctuation of <1.4MHz, and an Allan deviation of 6×1011 (τ=10,000s) in 20 h are obtained.

© 2012 Optical Society of America

OCIS Codes
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.3940) Instrumentation, measurement, and metrology : Metrology
(140.3425) Lasers and laser optics : Laser stabilization

ToC Category:
Lasers and Laser Optics

Original Manuscript: May 14, 2012
Revised Manuscript: July 31, 2012
Manuscript Accepted: July 31, 2012
Published: August 27, 2012

Jin Qian, Zhongyou Liu, Chunying Shi, Xiuying Liu, Jianbo Wang, Cong Yin, and Shan Cai, "Frequency stabilization of internal-mirror He–Ne lasers by air cooling," Appl. Opt. 51, 6084-6088 (2012)

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