AUTHOR=Lu Lu , Wang Zhiqiang , Yu Jiayi , Qiao Chunhong , Lin Rong , Cai Yangjian TITLE=Self-Focusing Property of Partially Coherent Beam With Non-Uniform Correlation Structure in Non-Linear Media JOURNAL=Frontiers in Physics VOLUME=9 YEAR=2022 URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2021.807542 DOI=10.3389/fphy.2021.807542 ISSN=2296-424X ABSTRACT=

Coherence in a light beam has the potential to serve as a degree of freedom for manipulating the beam. In this work, the self-focusing property of a partially coherent beam with a non-uniform correlation structure propagating in a non-linear medium is investigated. The analysis of the evolution of beam width reveals that the coherence structure plays a vital role in the self-focusing formation. A threshold condition for the coherence radius is proposed for the first time, and the relation of self-focusing length and initial coherence radius is studied numerically and analytically. It is shown that a feasible approach for manipulating the self-focusing length by adjusting the initial coherence radius is achieved.