Detailed analysis of the longitudinal acoustooptical resonances in a fiber Bragg modulator Ricardo E. Silva, 1,* Marcos A. R. Franco,2,3 Paulo T. Neves Jr.,4 Hartmut Bartelt,5 and Alexandre A. P. Pohl1 1
School of Electrical Engineering and Computer Science, Federal University of Technology-Paraná, Curitiba, Brazil 2 Institute of Advanced Studies-IEAv, São José dos Campos, SP, Brazil 3 Technological Institute of Aeronautics-ITA, São José dos Campos, SP, Brazil 4 Group of Applied Electronics and Systems, Federal University of Technology-Paraná, Toledo, PR, Brazil 5 Institute of Photonic Technology, IPHT, Jena, Germany *
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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
