Title :
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
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;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.765076
