Propagation of elliptical cosh-Gaussian beams and off-axial elliptical cosh-Gaussian beams in apertured optical systems

Abstract

Based on the fact that a hard-edged elliptical aperture can be expanded approximately as a finite sum of complex Gaussian functions in tensor form, an analytical propagation expression for an elliptical cosh-Gaussian beam (EChGB) truncated by an elliptical aperture and passing through an axially nonsymmetrical optical system is obtained by use of vector integration. Furthermore, the analytical propagation expression for a truncated off-axial EChGB is derived as an application example. Some numerical simulations are given to illustrate the propagation properties of EChGBs and off-axial EChGBs passing through a free space with an elliptical aperture.