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Optical Engineering

Practical use of the spatial coherence function for determining laser transverse mode structure
Author(s): Lawrence J. Pelz; Betty Lise Anderson
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Paper Abstract

The spatial coherence function of a beam exiting from a wave-guiding device can be used to determine the transverse modal composition of the fields which are supported within the structure. The strength of the spatial coherence technique is that it directly yields the relative modal weights which exist within the cavity. While this technique has received little attention in the past due to the experimental difficulties in measuring spatial coherence, a recently developed technique overcomes several of these problems. We demonstrate how the relative modal amplitudes may be extracted from the spatial coherence function for the case where the field distribution is described by Hermite-Gaussian polynomials. We point out some limitations of this method and discuss how these may be circumvented.

Paper Details

Date Published: 1 November 1995
PDF: 6 pages
Opt. Eng. 34(11) doi: 10.1117/12.212915
Published in: Optical Engineering Volume 34, Issue 11
Show Author Affiliations
Lawrence J. Pelz, Univ. of Dayton (United States)
Betty Lise Anderson, Ohio State Univ. (United States)

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