Abstract

We demonstrate a technique to lock the frequency of a laser to a transition between two excited states in Rb vapor using a two-photon process in the presence of a weak magnetic field. We use a ladder configuration from specific hyperfine sublevels of the $5S_{1∕2}$, $5P_{3∕2}$, and $5D_{5∕2}$ levels. This atomic configuration can show electromagnetically induced transparency and absorption processes. The error signal comes from the difference in the transparency or absorption felt by the two orthogonal polarizations of the probe beam. A simplified model is in good quantitative agreement with the observed signals for the experimental parameters. We have used this technique to lock the frequency of the laser up to $1.5\mathrm{GHz}$ off atomic resonance.

© 2009 Optical Society of America

A narrow window of Rabi frequency for competition between electromagnetically induced transparency and Raman absorption

Ray-Yuan Chang, Yi-Chi Lee, Wei-Chia Fang, Ming-Tsung Lee, Zong-Syun He, Bai-Cian Ke, and Chin-Chun Tsai
J. Opt. Soc. Am. B 27(1) 85-91 (2010)

Electromagnetically induced transparency in cold rubidium atoms

Min Yan, Edward G. Rickey, and Yifu Zhu
J. Opt. Soc. Am. B 18(8) 1057-1062 (2001)

Low-light-level ladder-type electromagnetically induced transparency and two-photon absorption

Zong-Syun He, Jing-Yuan Su, Hong-Ren Chen, Wei-Fu Chen, Meng-Huang Sie, Jyun-Yan Ye, and Chin-Chun Tsai
J. Opt. Soc. Am. B 31(10) 2485-2490 (2014)

High sensitivity spectroscopy of cesium Rydberg atoms using electromagnetically induced transparency

Jianming Zhao, Xingbo Zhu, Linjie Zhang, Zhigang Feng, Changyong Li, and Suotang Jia
Opt. Express 17(18) 15821-15826 (2009)

Coupling-intensity effects in ladder-type electromagnetically induced transparency of rubidium atoms

Han Seb Moon, Lim Lee, and Jung Bog Kim
J. Opt. Soc. Am. B 22(12) 2529-2533 (2005)