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

  • Waseem Raja
  • Pijush K. Mandal
  • Vaishali Naik
  • Alok Chakrabarti
  • Ayan Ray
Regular Article
  • 15 Downloads

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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Keywords

Quantum Optics 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Waseem Raja
    • 1
  • Pijush K. Mandal
    • 2
  • Vaishali Naik
    • 3
  • Alok Chakrabarti
    • 3
  • Ayan Ray
    • 3
  1. 1.Department of PhysicsUniversity of KashmirHazratbalIndia
  2. 2.Laser and Plasma Technology Division, Bhabha Atomic Research CentreTrombayIndia
  3. 3.Radioactive Ion Beam Group, Variable Energy Cyclotron CentreKolkataIndia

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