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Applied Optics

Applied Optics


  • Editor: Glenn D. Boreman
  • Vol. 44, Iss. 29 — Oct. 10, 2005
  • pp: 6269–6273

Active and passive frequency stabilization for a Q-switched Z-fold radio-frequency-excited waveguide CO2 laser with two channels

Zhaoshuo Tian, Shiliang Qu, and Zhenghe Sun  »View Author Affiliations

Applied Optics, Vol. 44, Issue 29, pp. 6269-6273 (2005)

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We report on passive offset frequency stability in free-running applications and active offset frequency stability achieved by use of a frequency-locking technique for a Q-switched Z-fold rf-excited waveguide CO2 laser with two channels. The laser structure of common electrodes and two channels has the advantage of compensating for the frequency variation caused by variations in temperature, cavity length, gas refractive index, and mechanical vibrations, so its offset frequency stability is higher than that of two separate lasers. In the experiments, the offset frequency shift was less than 6 MHz for 3 min in free-running mode. The technique of active offset frequency locking by counting was also introduced. The beat frequency shifting value was smaller than ±0.5 MHz in the long term.

© 2005 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(140.3470) Lasers and laser optics : Lasers, carbon dioxide
(140.3540) Lasers and laser optics : Lasers, Q-switched
(230.0250) Optical devices : Optoelectronics

ToC Category:
Lasers and Laser Optics

Original Manuscript: January 25, 2005
Revised Manuscript: April 4, 2005
Manuscript Accepted: April 6, 2005
Published: October 10, 2005

Zhaoshuo Tian, Shiliang Qu, and Zhenghe Sun, "Active and passive frequency stabilization for a Q-switched Z-fold radio-frequency-excited waveguide CO2 laser with two channels," Appl. Opt. 44, 6269-6273 (2005)

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