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Polarization spectroscopy of an excited state transition in Rubidium

Almuhawish, Nourah F.; Chen, Shuying; Downes, Lucy A.; Jamieson, Matthew J.; MacKellar, Andrew R.; Weatherill, Kevin J.

Polarization spectroscopy of an excited state transition in Rubidium Thumbnail


Nourah F. Almuhawish

Shuying Chen

Lucy A. Downes

Matthew J. Jamieson

Andrew R. MacKellar


We investigate polarization spectroscopy of an excited state transition in room-temperature rubidium vapor. By applying a circularly polarized coupling beam, resonant with the 52S1/2 → 52P3/2 transition, we induce anisotropy in the atomic medium that is then probed by scanning a probe beam across the 52P3/2 → 62S1/2 transition. By performing polarimetry on the probe beam, a dispersive spectral feature is observed. We characterize the excited-state polarization spectrum as a function of coupling intensity for both isotopes and find that at high intensities, Autler-Townes splitting results in a sub-feature, which theoretical modelling shows is enhanced by Doppler averaging. This spectroscopic technique produces a narrow dispersive signal which is ideal for laser frequency stabilization to excited-state transitions.


Almuhawish, N. F., Chen, S., Downes, L. A., Jamieson, M. J., MacKellar, A. R., & Weatherill, K. J. (2021). Polarization spectroscopy of an excited state transition in Rubidium. OSA continuum, 4(10), 2598-2605.

Journal Article Type Article
Acceptance Date Sep 15, 2021
Online Publication Date Oct 1, 2021
Publication Date Oct 15, 2021
Deposit Date Jul 29, 2021
Publicly Available Date Oct 7, 2021
Journal OSA Continuum
Publisher Optica Publishing Group
Peer Reviewed Peer Reviewed
Volume 4
Issue 10
Pages 2598-2605


Published Journal Article (3.4 Mb)

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Copyright Statement
Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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