Open AccessDetailed analysis of the longitudinal acousto-optical resonances in a fiber Bragg modulator
Author(s) -
Ricardo E. Silva,
Marcos A. R. Franco,
Pedro Manuel Oliveira Janeiro Neves,
Hartmut Bartelt,
Alexandre de Almeida Prado Pohl
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.006997
Subject(s) - fiber bragg grating , optics , grating , materials science , modulation (music) , optical fiber , acousto optics , diffraction grating , physics , acoustics
The interaction frequencies between longitudinal acoustic waves and fiber Bragg grating are numerically and experimentally assessed. Since the grating modulation depends on the acoustic drive, the combined analysis provides a more efficient operation. In this paper, 3-D finite element and transfer matrix methods allow investigating the electrical, mechanical and optical resonances of an acousto-optical device. The frequency response allows locating the resonances and characterizing their mechanical displacements. Measurements of the grating response under resonant excitation are compared to simulated results. A smaller than <1.5% average difference between simulated-measured resonances indicates that the method is useful for the design and characterization of optical modulators.