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Positioning a focused Gaussian beam inside a refractive cylinder



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Bernabeu Martínez, Eusebio and Salgado Remacha, Francisco Javier and Sánchez Martín, José Antonio (2014) Positioning a focused Gaussian beam inside a refractive cylinder. Optics and Lassers in Engineering, 55 . pp. 53-58. ISSN 0143-8166

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Official URL: http://dx.doi.org/10.1016/j.optlaseng.2013.10.020



We present in this work a study of the diffraction of a focused Gaussian beam by a microrefractive cylinder, and the dependence of the far field diffracted pattern with the location of the beam focal plane, relative to the center of the cylinder. A numerical study of the problem is carried out and validated with experimental verification. We center our attention on two parameters: the divergence and the number of peaks of the diffracted field. Both present a minimum for a particular position of the focal plane inside the refractive cylinder. This analysis can be used as a novel control technique for ablation of optical fibers and it can also be used as a criterion for the proper location of a focused laser beam inside an optical fiber with high accuracy. This criterion, based on the distribution of the far-field diffracted pattern, can be automated or used as a visual clue for a human operator.

Item Type:Article
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© 2013 Elsevier Ltd.
This work has been partially supported by the IPT-020000-2010-9 INNPACTO FORE Project of the Ministry of Science and Innovation of Spain. The authors also thank the comments and language editing of Dr. Jesús Martínez del Rincón, Prof. Dr. Agustín González-Cano, Elizabeth R Wright and Stephanie Smith.

Uncontrolled Keywords:Photonic-Nanojets, Propagation Method, Infinite Cylinder, Scattering, Optics
Subjects:Sciences > Physics > Optics
ID Code:25992
Deposited On:16 Jul 2014 11:13
Last Modified:16 Jul 2014 11:13

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