Gaussian Schell Source as Model for Slit-Collimated Atomic and Molecular Beams

2008/04/08 by Ben McMorran, McMorran, Ben, Alex Cronin +1
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Optics (physics.optics) #physics.atom-ph #physics.optics

paper · pdf · doi:10.48550/arxiv.0804.1162

5 pages, 5 figures

arxiv created 2008/04/11 · arxiv updated 2009/12/01

Abstract

We derive the spatial coherence and intensity profiles of beams emerging from two consecutive collimating apertures, and compare our results with data. We show how to make a Gaussian Schell-model (GSM) beam by assuming Gaussian apertures. Then we compare the intensity profile, the transverse coherence width and the divergence angle of a GSM beam with those same properties of a beam that is collimated with two hard-edged slits. The GSM beam formulae are simpler, and offer an intuitive way to understand how partially coherent beams interact with interferometers.

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