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arXiv · 2102.08724

High signal to noise absorption imaging of alkali atoms at moderate magnetic fields

Maurus Hans·Finn Schmutte·Celia Viermann·Nikolas Liebster·Marius Sparn·Markus K. Oberthaler·Helmut Strobel
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Abstract

We present an improved scheme for absorption imaging of alkali atoms at moderate magnetic fields, where the excited state is well in the Paschen-Back regime but the ground state hyperfine manifold is not. It utilizes four atomic levels to obtain an approximately closed optical cycle. With the resulting absorption of the corresponding two laser frequencies we extract the atomic column density of a $^{39}$K Bose-Einstein condensate. The scheme can be readily applied to all other alkali-like species.

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Maurus Hans, Finn Schmutte, Celia Viermann, Nikolas Liebster, Marius Sparn, Markus K. Oberthaler, Helmut Strobel. 2021-02-17. High signal to noise absorption imaging of alkali atoms at moderate magnetic fields. https://doi.org/10.1063/5.0040677

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