Numerical analysis of integrated acoustooptic tunable filters with weighted coupling

Author

Saitoh, Kunimasa ; Koshiba, Masanori ; TSuji, Yasnhide

Author_Institution

Dept. of Electron. & Inf. Eng., Hokkaido Univ., Sapporo, Japan

Volume

2

fYear

1998

fDate

1998

Firstpage

1293

Abstract

A numerical approach is newly formulated for design and modeling of integrated acoustooptic tunable filters (AOTF´s) with weighted coupling. First, acoustical field profiles in the substrate region and on the substrate surface are separately calculated with the finite element method (FEM) and the beam propagation method (BPM), respectively. These two-dimensional (2-D) profiles are used for constructing three-dimensional (3-D) strain and electric field profiles. Then, from the strains and electric fields the refractive index changes are derived. Finally, by analyzing modified optical waveguides with acoustooptic (AO) and electrooptic (EO) induced changes in refractive indices using again BPM, optical filter characteristics of AOTF´s can be evaluated

Keywords

acousto-optical filters; finite element analysis; integrated optics; optical tuning; acoustical field; beam propagation method; design; electric field; finite element method; integrated acoustooptic tunable filter; numerical model; optical waveguide; refractive index; strain field; three-dimensional profile; two-dimensional profile; weighted coupling; Acoustic beams; Capacitive sensors; Electrooptical waveguides; Finite element methods; Numerical analysis; Optical filters; Optical refraction; Optical surface waves; Optical waveguides; Surface acoustic waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE

Conference_Location

Sendai

ISSN

1051-0117

Print_ISBN

0-7803-4095-7

Type

conf

DOI

10.1109/ULTSYM.1998.765076

Filename

765076