In situ Raman gain between hyperfine ground states in a potassium magneto-optical trap

Jon Goldwin; Graeme Harvie; Adam Butcher

doi:10.1103/PhysRevA.100.033408

In situ Raman gain between hyperfine ground states in a potassium magneto-optical trap

Jon Goldwin, Graeme Harvie, Adam Butcher

Physics and Astronomy

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Abstract

We study optical gain in a gas of cold K39 atoms. The gain is observed during operation of a conventional magneto-optical trap without the need for additional fields. Measurements of transmission spectra from a weak probe show that the gain is due to stimulated Raman scattering between hyperfine ground states. The experimental results are reproduced by a simplified six-level model, which also helps explain why such gain is not observed in similar experiments with rubidium or cesium.

Original language	English
Article number	033408
Number of pages	6
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	100
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevA.100.033408
Publication status	Published - 9 Sep 2019

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PhysRevA.100.033408
Checked for eligibility: 12/09/2019 Harvie, G., Butcher, A., & Goldwin, J., In situ Raman gain between hyperfine ground states in a potassium magneto-optical trap, Physical Review A, 100, 033408 (2019), copyright © 2019 American Physical Society. https://doi.org/10.1103/PhysRevA.100.033408
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abstract = "We study optical gain in a gas of cold K39 atoms. The gain is observed during operation of a conventional magneto-optical trap without the need for additional fields. Measurements of transmission spectra from a weak probe show that the gain is due to stimulated Raman scattering between hyperfine ground states. The experimental results are reproduced by a simplified six-level model, which also helps explain why such gain is not observed in similar experiments with rubidium or cesium.",

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AB - We study optical gain in a gas of cold K39 atoms. The gain is observed during operation of a conventional magneto-optical trap without the need for additional fields. Measurements of transmission spectra from a weak probe show that the gain is due to stimulated Raman scattering between hyperfine ground states. The experimental results are reproduced by a simplified six-level model, which also helps explain why such gain is not observed in similar experiments with rubidium or cesium.

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In situ Raman gain between hyperfine ground states in a potassium magneto-optical trap

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