title: Detailed analysis of the longitudinal acousto-optical resonances in a fiber Bragg modulator.
abstract: 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.
authors.affiliation: School of Electrical Engineering and Computer Science, Federal University of Technology-Paraná, Curitiba, Brazil. ricardoezq@yahoo.com.br
authors.forename: Ricardo E
authors.initials: RE
authors.lastname: Silva
authors.forename: Marcos A R
authors.initials: MA
authors.lastname: Franco
authors.forename: Paulo T
authors.initials: PT
authors.lastname: Neves
authors.forename: Hartmut
authors.initials: H
authors.lastname: Bartelt
authors.forename: Alexandre A P
authors.initials: AA
authors.lastname: Pohl
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D013016:Sound