山西大学学报（自然科学版）2025，Vol.48Issue(5)：946-954,9.DOI:10.13451/j.sxu.ns.2024065
四阶衍射对双曲余弦高斯光束传输的影响
Influence of Fourth-order Diffraction Effect on the Hyperbolic Cosh-Gaussian Beams Transmission
张海洋 1宋丽军1
作者信息
- 1. 山西大学 物理电子工程学院,山西 太原 030006
- 折叠
摘要
Abstract
Based on the(1+1)dimensional linear Schrӧdinger equation,which is a theoretical model to describe the beam evolution in strongly nonlocal nonlinear media with the fourth-order diffraction effect,the transmission dynamics of the hyperbolic cosh-Gaussian beams with initial chirp are numerically studied.The results show that no matter the initial input hyperbolic cosh-Gaussian beam is one-humped or double-humped structure,the beam evolution without initial chirp maintains good periodic pulsation behav-ior.The normal fourth-order diffraction effect leads to the pulsation period smaller,and the abnormal fourth-order diffraction effect leads to the pulsation period larger.If the center of the initial beam is not located at x=0,the two sub-beams of the double-humped hyperbolic cosh-Gaussian beam evolve along the"Z-shaped"trajectory with the same period and different oscillation amplitude due to the different offset velocity.The existence of the fourth-order diffraction effect destroys the periodicity of their evolution and causes serious beam splitting.Both the initial chirp and the parabolic potential have certain effects on the amplitude and period of the beam pulsation.关键词
四阶衍射效应/双曲余弦高斯光束/强非局域非线性介质/初始啁啾Key words
fourth-order diffraction effect/cosh-Gaussian beams/strongly nonlocal nonlinear media/initial chirp分类
信息技术与安全科学引用本文复制引用
张海洋,宋丽军..四阶衍射对双曲余弦高斯光束传输的影响[J].山西大学学报（自然科学版）,2025,48(5):946-954,9.
