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Springer series in optical sciences/SPringer series in optical sciences

Collisional Effects in the Saturation Spectroscopy of Three-Level Systems: Theory and Experiment

P. R. Berman, P. F. Liao, John E. Bjorkholm

Published Jan 1, 1979• 0 citations
Publisher
DOI
10.1007/978-3-540-38950-7_69

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Physical Review A•Dec 1, 1979•27 citations
A theory of saturation spectroscopy in three-level gas-vapor systems, including collisional effects, is presented. Using a model of collisions in which they are phase interrupting in their effect on level coherences and velocity changing in their effect on level population densities, the authors calculate the absorption profile of a weak probe field on a given transition when an arbitrarily strong pump field acts on a coupled transition. Line shapes are derived for an arbitrary collision kernel describing the velocity-changing collisions, and these line shapes are evaluated for the collision kernel proposed by Keilson and Storer. Various limiting forms for the line shapes are derived and representative line shapes are displayed. Several new features of the line shapes, including collisionally induced increased probe absorption are discussed. The line shapes are seen to reflect the various collisional processes that may occur in atomic or molecular systems.