title: Shannon entropy method of small-scale self-focusing assessment in high-power laser systems.
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.
authors.forename: Rende
authors.initials: R
authors.lastname: Liu
authors.forename: Dongxia
authors.initials: D
authors.lastname: Hu
authors.forename: Xuewei
authors.initials: X
authors.lastname: Deng
authors.forename: Junpu
authors.initials: J
authors.lastname: Zhao
authors.forename: Wenyi
authors.initials: W
authors.lastname: Wang
authors.forename: Wanjun
authors.initials: W
authors.lastname: Dai
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Huang
authors.forename: Min
authors.initials: M
authors.lastname: Li
authors.forename: Sheng
authors.initials: S
authors.lastname: Yang