Diffraction of a Gaussian beam by a logarithmic axicon

被引：8

作者：

Kotlyar, Victor V. ^{[1
,2
]}

Kovalev, Alexey A. ^{[1
,2
]}

Stafeev, Sergey S. ^{[1
,2
]}

Soifer, Victor A. ^{[1
,2
]}

机构：

[1] Russian Acad Sci, Image Proc Syst Inst, Laser Measurements Lab, Samara 443001, Russia

[2] SP Korolyov Samara State Aerosp Univ, Tech Cybernet Subdept, Samara 443086, Russia

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2011年 / 28卷 / 05期

关键词：

D O I：

10.1364/JOSAA.28.000844

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We derive an explicit analytical relationship to describe the axial light intensity when a Gaussian beam is diffracted by the logarithmic axicon (LA). An evaluation formula for the effective radius of the diffraction pattern that we deduce shows the said radius to be in inverse proportion to the LA "force" parameter. The finite-difference time-domain-based simulation has shown that using the LA makes it possible to go beyond the diffraction limit: in the LA vicinity, the FWHM of the light beam can be as small as one fifth of the illumination wavelength. (C) 2011 Optical Society of America

引用

页码：844 / 849

页数：6

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