Methods for estimating beam parameters of superimposed Hermite-Gaussian modes

Xin Xue; Andrew G. Kirk

doi:10.1117/12.386773

24 May 2000 Methods for estimating beam parameters of superimposed Hermite-Gaussian modes

Xin Xue, Andrew G. Kirk

Proceedings Volume 4089, Optics in Computing 2000; (2000) https://doi.org/10.1117/12.386773
Event: 2000 International Topical Meeting on Optics in Computing (OC2000), 2000, Quebec City, Canada

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.

Citation Download Citation

Xin Xue and Andrew G. Kirk "Methods for estimating beam parameters of superimposed Hermite-Gaussian modes", Proc. SPIE 4089, Optics in Computing 2000, (24 May 2000); https://doi.org/10.1117/12.386773

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