Self-distributed feedback lasing in a system of cold atoms
Department of Physics and Applied Physics, John Anderson Building
University of Strathclyde - Glasgow, G4 0NG, Scotland, UK
2 Dipartimento di Fisica, Università degli Studi di Milano Via Celoria 16, Milano I-20133, Italy
Accepted: 22 November 1999
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.
PACS: 42.55.-f – Lasers / 42.50.Vk – Mechanical effects of light on atoms, molecules, electrons, and ions / 32.80.Lg – Mechanical effects of light on atoms, molecules, and ions
© EDP Sciences, 2000