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Proceedings Paper

Methods for estimating beam parameters of superimposed Hermite-Gaussian modes
Author(s): Xin Xue; Andrew G. Kirk
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Paper Abstract

In many applications, it is necessary to evaluate the beam parameters of the basis Hermite-Gaussian functions which are used to decompose a given laser beam. This paper compares two methods for estimating the beam parameters, both of which are based on intensity measurement. One is an exact optimization method, which can find the optimal beam parameters but has high computational demands. The other is a moment method which requires less computation but only yields approximation to the optimal beam parameters and whose application is limited to beams close to Gaussian or a mixture of incoherent Hermite-Gaussian modes. It is found that the moment method can provide sufficiently accurate results in certain circumstances.

Paper Details

Date Published: 24 May 2000
PDF: 7 pages
Proc. SPIE 4089, Optics in Computing 2000, (24 May 2000); doi: 10.1117/12.386773
Show Author Affiliations
Xin Xue, McGill Univ. (United States)
Andrew G. Kirk, McGill Univ. (Canada)


Published in SPIE Proceedings Vol. 4089:
Optics in Computing 2000
Roger A. Lessard; Tigran V. Galstian, Editor(s)

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