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The blue light in a ladder system: from double resonance optical pumping to Autler-Townes splitting

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Abstract

In this experimental work we report our findings about a Ladder (Ξ) transition 5S1∕2 → 5P3∕2 → 5D3∕2 of 85Rb atoms under different laser power combinations. Based on the ratio of power levels of two individual lasers, which are used in counter-propagating configuration, the system exhibits double resonance optical pumping and Autler-Townes splitting. The excursion of the Ξ level coupling is studied alongwith photon counting of blue light originating from 5D3∕2 → 6P3∕2 → 5S1∕2 non-degenerate decay. The blue photon statistics shows that emitted radiation are thermal. However the probability density of the integrated photon count vs. laser power exhibits a jump in intensity scale followed by a long tail, which resembles Lèvy type distribution. This may be considered as a signature when the level dressing changes in Ξ system as theoretically discussed earlier by Abi-Salloum [T.Y. Abi-Salloum, J. Mod. Opt. 57, 1366 (2010); T.Y. Abi-Salloum, Phys. Rev. A 81, 053836 (2010)].

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Authors and Affiliations

  1. Department of Physics, University of Kashmir, Hazratbal, Srinagar, 190006, India

    Waseem Raja

  2. Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400 085, India

    Pijush K. Mandal

  3. Radioactive Ion Beam Group, Variable Energy Cyclotron Centre, Kolkata, 700064, India

    Vaishali Naik, Alok Chakrabarti & Ayan Ray

Authors
  1. Waseem Raja
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  2. Pijush K. Mandal
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  3. Vaishali Naik
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  4. Alok Chakrabarti
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  5. Ayan Ray
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Correspondence to Ayan Ray.

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Raja, W., Mandal, P.K., Naik, V. et al. The blue light in a ladder system: from double resonance optical pumping to Autler-Townes splitting. Eur. Phys. J. D 72, 123 (2018). https://doi.org/10.1140/epjd/e2018-90146-3

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  • DOI: https://doi.org/10.1140/epjd/e2018-90146-3

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