Evolution of Surface Acoustic Waves in an Optical Microfiber

Abstract

This is the accepted version of the paper.This version of the publication may differ from the final published version. 1  Abstract-This paper reports SBS characterization in a tapered optical fiber using full-vectorial finite element based numerical methods. Numerical simulations of both optical and acoustic waves' propagation through a tapered microfiber have been carried out. Acoustic modes over a range of wavenumber for different fiber core radii are obtained and nature of their both dominant and non-dominant displacement vector profiles are studied and discussed. Acoustic mode profiles show confinement of the acoustic wave predominantly at the core cladding interface. In addition, the acousto-optical overlap factors at different fiber radii are also presented. Permanent