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  • Received: Jul. 16, 2007

    Accepted: --

    Posted: Apr. 21, 2008

    Published Online: Apr. 21, 2008

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    Hui Yan, Guoqing Yang, Jin Wang, Mingsheng Zhan. Laser frequency stabilization based on Sagnac interferometric spectroscopy[J]. Chinese Optics Letters, 2008, 6(4): 307

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Chinese Optics Letters, Vol. 6, Issue 4, 307 (2008)

Laser frequency stabilization based on Sagnac interferometric spectroscopy

Hui Yan, Guoqing Yang, Jin Wang, and Mingsheng Zhan

Author Affiliations

  • State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071

Abstract

A simple method based on Sagnac interferometric spectroscopy (SIS) is applied for frequency stabilization of diode lasers. Sagnac interferometric spectra of rubidium vapor are investigated both theoretically and experimentally. The interference signal at the output of the Sagnac interferometer displays a sharp dispersion feature near the atomic resonance. This dispersion curve is used as the feedback error signal to stabilize the laser frequency. Linewidth of a diode laser is stabilized down to 1 MHz by this modulation-free method.

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