Nonlinear-resonance line shapes: Dependence on the transverse intensity distribution of a light beam

Journal Article · Sun Feb 01 00:00:00 EST 2004 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.69.024501· OSTI ID:20640792

Taichenachev, A V; Yudin, V I ^[1]; Tumaikin, A M ^[1]; Staehler, M ^[2]; Wynands, R ^[3]; Kitching, J ^[2]; Hollberg, L ^[2]

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1. Novosibirsk State University, Pirogova 2, Novosibirsk 630090 (Russian Federation)
2. Time and Frequency Division, NIST Boulder, 325 South Broadway, Boulder, Colorado 80305 (United States)
3. Institut fuer Angewandte Physik, Universitaet Bonn, Wegelerstrasse 8, D-53115 Bonn (Germany)

We analyze the line shape and width of atomic coherent-population-trapping (CPT) resonances excited by laser beams with different transverse intensity profiles. A dramatic difference in the resonance line shape is found when comparing a beam with a 'steplike' profile to a beam with a Gaussian profile. In particular, for nonuniform profiles, a non-Lorentzian functional form is given that is more appropriate for describing the nonlinear resonance line shape than is a conventional Lorentzian. Our analysis is supported by measurements of CPT line shapes in a thermal vapor of {sup 85}Rb.

• OSTI ID: 20640792
• Journal Information: Physical Review. A, Vol. 69, Issue 2; Other Information: DOI: 10.1103/PhysRevA.69.024501; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
DISTRIBUTION
LASER RADIATION
LINE WIDTHS
NONLINEAR PROBLEMS
RESONANCE
RUBIDIUM
RUBIDIUM 85
TRAPPING
VAPORS
VISIBLE RADIATION