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  • Received: Mar. 11, 2004

    Accepted: --

    Posted: Jun. 6, 2006

    Published Online: Jun. 6, 2006

    The Author Email: Weiguang Ma (mwg@sxu.edu.cn)

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    Weiguang Ma, Lei Dong, Wangbao Yin, Changyong Li, Suotang Jia. Frequency stabilization of diode laser to 1.637 μm based on the methane absorption line[J]. Chinese Optics Letters, 2004, 2(8): 486

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Chinese Optics Letters, Vol. 2, Issue 8, 486 (2004)

Frequency stabilization of diode laser to 1.637 μm based on the methane absorption line

Weiguang Ma*, Lei Dong, Wangbao Yin, Changyong Li, and Suotang Jia

Author Affiliations

  • College of Physics and Electronics Engineering, Shanxi University, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Taiyuan 030006

Abstract

The frequency of an external-cavity diode laser has been stabilized to 1.637 μm by using the reference of absorption lines of methane. The method can be applied to wavelength division multiplexed optical communication, fiber-optic sensing systems, as well as the high-sensitivity detection of methane. The derivative-like error signal yielded by frequency modulation and phase sensitivity detection technology is inputted into the PI feedback loop circuit in order to stabilize the frequency to the line center. After stabilization, the frequency fluctuation of diode laser is held within 5.6 MHz, and the root of Allan variance of error signal reaches a minimum of 1.66*10^(-10) for an average time of 10 s.

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