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Proceedings Paper

Definition, meaning, and measurement of coherence parameters
Author(s): Bernd Eppich
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Paper Abstract

It is a well-known rule of thumb that the intensity profiles of a beam are smoother andless structured the less the transverse coherence of the beam is. In this paper it will be shown that the global degree of coherence as well as the lateral coherence length is related to the width of the Fourier power spectra ofthe profiles the beam takes on under propagation and hencecan be considered as a quantitative measure of the smoothness of the beam. A spin-off of these considerations is a simple non-interferometric measurement procedure for both, the global degree of coherence of a beam and the lateral coherence length.

Paper Details

Date Published: 24 April 2001
PDF: 9 pages
Proc. SPIE 4270, Laser Resonators IV, (24 April 2001); doi: 10.1117/12.424675
Show Author Affiliations
Bernd Eppich, Technical Univ. of Berlin (Germany)

Published in SPIE Proceedings Vol. 4270:
Laser Resonators IV
Alexis V. Kudryashov; Alan H. Paxton, Editor(s)

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