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Laser frequency stabilization based on Sagnac interferometric spectroscopy |
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| Authors: | Hui Yan Guoqing Yang Jin Wang Mingsheng Zhan |
| 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. |
| Keywords: | spectroscopy Sagnac based stabilization frequency Linewidth diode laser dispersion curve used feedback error signal stabilize interference output interferometer displays feature atomic resonance spectra |
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