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Journal of the Optical Society of America B

Linear polarization spectroscopy in rubidium

Shi-Hao Sun, Yong-Feng Wu, Jiang Bo-Nan

Published Jun 1, 2026• 0 citations
Publisher

Abstract

We realize the linear polarization spectroscopy on the D2 transitions of rubidium atoms and investigate the underlying physics with an analytical theory using the Nakayama model. We demonstrate that the strong birefringence in the rubidium atomic gas is induced by the π light optical pumping, which is distinguished from the conventional PS using circularly polarized light. The theory agrees with the experiment reasonably well, except for the upper hyperfine closed transitions where the saturation plays nontrivial roles. The effects of the misalignment of the polarization optics and the miscalibration of the pump intensity are also discussed.

DOI
10.1364/josab.596545

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We present an experimental and theoretical study of self-rotation of optical polarization in a rubidium vapor.The atomic vapor is placed in a magnetic shielding cavity to suppress the Faraday rotation effect.In our experiment, Doppler-free spectroscopy configuration is used, and F = 2 → F = 3 transition of 87 Rb D2 line is chosen.We observe self-rotation of optical polarization effect at different pump light ellipticities.A theoretical analysis is then provided based on the experimental conditions.Theoretical simulation and experimental results are in good agreement.