Finite element modeling of acousto-optic effect and optimization of the figure of merit

Robert McIntosh; Amar S. Bhalla; Ruyan Guo

doi:10.1117/12.956441

15 October 2012 Finite element modeling of acousto-optic effect and optimization of the figure of merit

Robert McIntosh, Amar S. Bhalla, Ruyan Guo

Proceedings Volume 8497, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VI; 849703 (2012) https://doi.org/10.1117/12.956441
Event: SPIE Optical Engineering + Applications, 2012, San Diego, California, United States

Abstract

A study of the acousto-optic (AO) effect in a family of oxide crystals (including e.g., TiO₂, ZnO, LiNbO₃, and ferroelectric perovskites) as well as semiconductors has been conducted by finite element analysis method. In addition, the acousto-optic figure of merit (FOM) as a function of material's refractive index, density, effective AO coefficient and the velocity of the acoustic wave in the material, is also investigated. By examining the directional dependent velocity, acousto-optic coefficients, and refractive index, the acousto-optic FOM can be calculated and plotted in all directions revealing the optimal crystal orientation to maximize coupling between the optical and acoustic waves. A finite element model was developed to corroborate the predicted interaction. The model examines the diffraction that occurs by the optical wave as it travels through an acousto-optic medium. The combined information gained from Mathematica and COMSOL Multiphysics-based modeling is shown to be an effective means of predicating acousto-optic device functionality.

Citation Download Citation

Robert McIntosh, Amar S. Bhalla, and Ruyan Guo "Finite element modeling of acousto-optic effect and optimization of the figure of merit", Proc. SPIE 8497, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications VI, 849703 (15 October 2012); https://doi.org/10.1117/12.956441

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