Self-Focusing Property of Partially Coherent Beam With Non-Uniform Correlation Structure in Non-Linear Media

Frontiers in Physics

Lu Lu¹  Chunhong Qiao²  Zhiqiang Wang³  Jiayi Yu⁴  Rong Lin⁵  Yangjian Cai⁶ 

[1] Jiangsu Key Lab of Opto-Electronic Technology, School of Physics and Technology, Nanjing Normal University, Nanjing, China;Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, China;National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology, Chinese Academy of Sciences, Nanjing, China;CAS Key Laboratory of Astronomical Optics and Technology, Nanjing Institute of Astronomical Optics and Technology, Nanjing, China;Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan, China;Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan, China;College of Physics and Electronic Engineering, Heze University, Heze, China;Shandong Provincial Engineering and Technical Center of Light Manipulations & Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan, China;School of Physical Science and Technology, Soochow University, Suzhou, China;

关键词: partially coherent beam;    non-uniform correlation structure;    optical coherence;    coherence radius;    self-focusing length;   

DOI  :  10.3389/fphy.2021.807542

来源: Frontiers

【 摘 要 】

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.

【 授权许可】

CC BY