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Advances in Optical Technologies
Volume 2016 (2016), Article ID 3696094, 10 pages
Research Article

Modeling Nonlinear Acoustooptic Coupling in Fiber Optics Based on Refractive Index Variation due to Local Bending

Facultad de Ciencias, Escuela de Física, Universidad Nacional de Colombia, Medellín, A.A. 3840, Medellín 20036, Colombia

Received 4 April 2016; Revised 22 August 2016; Accepted 23 August 2016

Academic Editor: José Luís Santos

Copyright © 2016 Catalina Hurtado Castano et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A detailed procedure is presented to compute analytically the acoustooptic coupling coefficient between copropagating core and lowest-order cladding modes in tapered fiber optics. Based on the effect of the local bending, the linear and nonlinear variations in the refractive index are modeled. A set of equations and parameters are presented in order to calculate the influence of acoustooptic effect in nonlinear pulse propagation. We will show that as the tapered fiber diameter decreases more energy can be transferred to the cladding and the nonlinear phenomena can compensate the coupling coefficients effects.