Self-distributed feedback lasing in a system of cold atoms

McNeil, B.W.J. and Robb, G.R.M. and Bonifacio, R. and Piovella, N. (2000) Self-distributed feedback lasing in a system of cold atoms. EPL: A Letters Journal Exploring the Frontiers of Physics, 49 (3). pp. 316-321. ISSN 0295-5075

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Abstract

We present a semiclassical analysis of lasing with an injected signal in a system of cold two-level atoms where the effects of atomic recoil are included self-consistently. This analysis predicts that the atoms may bunch under the effects of dipole forces to produce a density grating. This grating produces distributed feedback which can induce lasing action even when the gain of the atomic medium is less than the cavity losses.