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

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

2008-04-08

arxiv.org/abs/0804.1162v2

Physics

Optics

5 pages, 5 figures

Scientific paper

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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