Shannon entropy method of small-scale self-focusing assessment in high-power laser systems

Optics Express
Rende LiuSheng Yang

Abstract

Through analysis of near-field beam profiles, we propose a method using Shannon entropy to assess the development of small-scale self-focusing during laser propagation and amplification in high-power laser systems. In this method, the entropy curve that corresponds to increasing B integral displays an evident turning point at which small-scale self-focusing starts to rapidly develop. In contrast to classical methods using contrast, modulation, or power spectral density, the proposed method provides the B integral criterion more clearly and objectively. This approach is an optimization method that can be utilized in the design and operation of high-power laser systems.

References

Mar 30, 2007·Optics Letters·Denis VillateClaude Rouyer
May 22, 2007·Applied Optics·C A HaynamB M Van Wonterghem
Feb 23, 2010·Optics Express·Alexander M RubenchikMichail P Fedoruk
Jan 1, 1995·Applied Optics·J M Elson, J M Bennett
Mar 5, 2013·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Luke L A Price
Aug 14, 2013·Optics Letters·Xiao ChenWeiwu Ren
Aug 5, 2014·Optics Express·Joshua P ToomeyThorsten Ackemann

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