Observation of transient gain without population inversion in a laser-cooled rubidium <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>Λ</mi></math></span> system

S. R. de Echaniz; Andrew D. Greentree; A. V. Durrant; D. M. Segal; J. P. Marangos; J. A. Vaccaro

doi:10.1103/PhysRevA.64.055801

Observation of transient gain without population inversion in a laser-cooled rubidium $Λ$ system

S. R. de Echaniz, Andrew D. Greentree, A. V. Durrant, D. M. Segal, J. P. Marangos, and J. A. Vaccaro

Phys. Rev. A 64, 055801 – Published 10 October 2001

Abstract

We have observed clear Rabi oscillations of a weak probe in a strongly driven three-level $Λ$ system in laser-cooled rubidium. When the coupling field is nonadiabatically switched on using a Pockels cell, transient probe gain without population inversion is obtained in the presence of uncoupled absorptions. Our results are supported by three-state computations.

Received 17 May 2001

DOI:https://doi.org/10.1103/PhysRevA.64.055801

Authors & Affiliations

S. R. de Echaniz¹, Andrew D. Greentree¹, A. V. Durrant¹, D. M. Segal², J. P. Marangos², and J. A. Vaccaro³

¹Quantum Processes Group, Department of Physics and Astronomy, The Open University, Walton Hall, Milton Keynes MK7 6AA, United Kingdom
²Laser Optics and Spectroscopy Group, Blackett Laboratory, Imperial College of Science, Technology and Medicine, Prince Consort Road, London SW7 2BW, United Kingdom
³Department of Physics and Astronomy, University of Hertfordshire, College Lane, Hatfield AL10 9AB, United Kingdom

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Vol. 64, Iss. 5 — November 2001

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