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.

© 2008 Chinese Optics Letters

Modulation-free frequency stabilization of external-cavity diode laser based on a phase-difference biased Sagnac interferometer

Fang Wei, Dijun Chen, Zujie Fang, Haiwen Cai, and Ronghui Qu
Opt. Lett. 35(22) 3853-3855 (2010)

Interferometric, modulation-free laser stabilization

N. P. Robins, B. J. J. Slagmolen, D. A. Shaddock, J. D. Close, and M. B. Gray
Opt. Lett. 27(21) 1905-1907 (2002)

Evaluation of the Sagnac-loop laser frequency stabilization to sub-Doppler spectral lines

Taro Hasegawa
J. Opt. Soc. Am. B 40(3) 667-672 (2023)

Laser frequency stabilization by bichromatic saturation absorption spectroscopy

Genko Genov, Tim E. Lellinger, Thomas Halfmann, and Thorsten Peters
J. Opt. Soc. Am. B 34(9) 2018-2030 (2017)

Diode-laser frequency stabilization by two-frequency Doppler-broadened absorption spectroscopy

Jin-Long Peng and Hyeyoung Ahn
Appl. Opt. 43(31) 5860-5863 (2004)