Abstract

A study is performed for the propagation of optical vortices in quadratic nonlinear media with linear and nonlinear absorption. When such beams propagate in media with a quadratic nonlinearity without absorption, their vortex structure is destroyed and they break up into several nonvortex quasi-solitons. Nonlinear absorption allows the beam to keep its structure longer.

中文翻译：

---

具有非线性吸收的二次非线性介质中的旋涡

摘要

对光学涡旋在具有线性和非线性吸收的二次非线性介质中的传播进行了研究。当此类光束在具有二次非线性且没有吸收的介质中传播时，其涡旋结构将被破坏，并分解为多个非涡旋准孤子。非线性吸收使光束可以保持更长的结构。