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New design of AOTF using ZnO/LiNbO3 thin-plating surface acoustical waveguide

HEHUA XU1,* , JISHENG YANG2

Affiliation

  1. Department of Applied Physics, Hebei University of Engineering, Handan 056038, China
  2. Department of Applied Physics, Tianjin University,. China

Abstract

In this paper, a new non-collinear configuration of acousto-optic tunable filter (AOTF) which uses ZnO film-loaded surface acoustical waveguide (SAWG) on X-cut Y-propagating LiNbO3 (X-Y LiNbO3) is designed in which the interdigital transducer should be inclined 3.16°. The thickness of the ZnO makes the velocity of surface acoustical wave (SAW) decrease to 3.23%. Cubic spline interpolation method is used to obtain the walk-off angular (the angular from the propagation direction to the power-flux vector) curve with the velocity curve directly and calculation of SAW propagation in ZnO/X-Y LiNbO3 gives that the walk-off angular is 3.16° when the velocity decreases to 3.23%..

Keywords

SAW, Non-collinear AOTF, Interdigital transducer, ZnO film, SAW.

Submitted at: April 1, 2010
Accepted at: July 14, 2010

Citation

HEHUA XU, JISHENG YANG, New design of AOTF using ZnO/LiNbO3 thin-plating surface acoustical waveguide, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 7, pp. 1463-1465 (2010)