Overcoming Diffraction in FSO Systems Using (GRIN) Axicons for Approximating the Longitudinal Intensity Profiles

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Author(s):	Ambrosio, Leonardo A. ^[1] ; Zamboni-Rached, Michel ^[2] ; Hernandez-Figueroa, Hugo E. ^[1] Total Authors: 3
Affiliation:	^[1] Univ Estadual Campinas, Sch Elect & Comp Engn, Dept Microwaves & Opt, BR-13083970 Campinas, SP - Brazil ^[2] Univ Fed ABC, BR-09210270 Santo Andre, SP - Brazil Total Affiliations: 2
Document type:	Journal article
Source:	Journal of Lightwave Technology; v. 29, n. 17, p. 2527-2532, SEP 1 2011.
Web of Science Citations:	3
Abstract
From Huygens-Fresnel integral in cylindrical coordinates and by conveniently choosing the phase function fromenergy considerations, we demonstrate the possibility of approximately achieving and almost freely chosen longitudinal intensity profile along the optical axis for Free Space Optics (FSO) using a simple theory. These phase functions represent optical elements that could be coupled to the transmitter and, in the case of this work, it is shown that axicons and gradient-index (GRIN) axicons, which are commercially available and cost-effective, can be easily designed for applications in FSO systems to overcome diffraction and possible atmospheric attenuations, to increase the link distance or to diminish the power emitted. (AU)

FAPESP's process:	05/51689-2 - Optics and Photonics Research Center at UNICAMP
Grantee:	Hugo Luis Fragnito
Support Opportunities:	Research Grants - Research, Innovation and Dissemination Centers - RIDC