Definition, meaning, and measurement of coherence parameters

Bernd Eppich

doi:10.1117/12.424675

24 April 2001 Definition, meaning, and measurement of coherence parameters

Bernd Eppich

Proceedings Volume 4270, Laser Resonators IV; (2001) https://doi.org/10.1117/12.424675
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

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.

Citation Download Citation

Bernd Eppich "Definition, meaning, and measurement of coherence parameters", Proc. SPIE 4270, Laser Resonators IV, (24 April 2001); https://doi.org/10.1117/12.424675

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