Title :
Overcoming Diffraction in FSO Systems Using (GRIN) Axicons for Approximating the Longitudinal Intensity Profiles
Author :
Ambrosio, Leonardo A. ; Zamboni-Rached, Michel ; Hernández-Figueroa, Hugo E.
Author_Institution :
Dept. of Microwaves & Opt., Univ. of Campinas, Campinas, Brazil
Abstract :
From Huygens-Fresnel integral in cylindrical coordinates and by conveniently choosing the phase function from energy 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.
Keywords :
atmospheric optics; gradient index optics; lenses; light diffraction; optical design techniques; optical transmitters; FSO systems; GRIN axicons; Huygens-Fresnel integral; atmospheric attenuations; cylindrical coordinates; free space optics; gradient-index axicons; longitudinal intensity profile; optical axis; optical diffraction; optical elements; optical transmitter; phase function; phase functions; Approximation methods; Diffraction; Optical design; Optical diffraction; Optical refraction; Optical transmitters; Optical variables control; Attenuation; diffraction; graded index optics; optical communication;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2160152
