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2008•Journal of Yunnan Normal UniversityRequires access

The Characteristics of the Diffraction Field of Gaussian Beam by a Circular Aperture

Feng Bai

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Abstract

Based on Collins integral formula and the expansion of the hard aperture function into a finite sum of complex Gaussian functions,the approximate analytical expression of the diffraction field of Gaussian beam by a circular aperture is derived,the intensity distribution on the axis and the different diffractive regions are analyzed by the numerical calculation and numerical simulation.The relation between the intensity on the axis and the radius of the aperture is studied.There is diffractive focus on axis.

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What this paper is about

Based on Collins integral formula and the expansion of the hard aperture function into a finite sum of complex Gaussian functions,the approximate analytical expression of the diffraction field of Gaussian beam by a circular aperture is derived,the intensity distribution on the axis and the different diffractive regions are analyzed by the numerical calculation and numerical simulation.The relation between the intensity on the axis and the radius of the aperture is studied.There is diffractive focus on axis.

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Available abstract

Based on Collins integral formula and the expansion of the hard aperture function into a finite sum of complex Gaussian functions,the approximate analytical expression of the diffraction field of Gaussian beam by a circular aperture is derived,the intensity distribution on the axis and the different diffractive regions are analyzed by the numerical calculation and numerical simulation.The relation between the intensity on the axis and the radius of the aperture is studied.There is diffractive focus on axis.

Key concepts: Diffraction, Aperture (computer memory), Gaussian beam, Gaussian, Optics, RADIUS, Beam divergence, Physics

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