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Better calculation of SAW in LiNbO3 and new designed configuration of acousto-optic tunable filters

HEHUA XU1,* , JISHENG YANG1, CHUANJING WEN1, CHANGKU SUN2

Affiliation

  1. Department of Applied Physics, Tianjin University, P. R. China
  2. State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, P. R. China

Abstract

In this paper, a new non-collinear configuration of acousto-optic tunable filters (AOTF) which uses X cut Y propagation lithium niobate (X-Y LiNbO3) as surface acoustic wave (SAW) waveguide is designed in which the interdigital transducer should be inclined 4.18°. Cubic spline interpolation method (a drafting acid used to draw smooth curves through a set of points) is used to obtain the walk-off angular (the angular from the propagation direction to the power-flux vector) curve with the gained velocity curve of SAW directly and calculation of SAW propagation in X-Y LiNbO3 gives that the walk-off angular is 4.18°..

Keywords

SAW, non-collinear AOTF, Interdigital transducer, Cubic spline.

Submitted at: June 8, 2006
Accepted at: July 20, 2006

Citation

HEHUA XU, JISHENG YANG, CHUANJING WEN, CHANGKU SUN, Better calculation of SAW in LiNbO3 and new designed configuration of acousto-optic tunable filters, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 4, pp. 1589-1592 (2006)