In this work, a generalized model of acoustooptic multifrequency interaction in wave-guiding structures is described. The model, which is based on the generalized coupled model theory, can evaluate the diffraction efficiency in Bragg regime when a multifrequency signal is applied to the interdigitated transducer deposited on the optical waveguide surface. The influence of fabrication parameters of Ti:LiNbO3 waveguides on the diffraction efficiency and on the linear dynamic range of acoustooptic multifrequency Bragg cells has been also considered under monomodal propagation condition. Our results assert that the best performance in terms of linear dynamic range can be obtained on Ti:LiNbO3 waveguides having weak refractive index change and small initial titanium thickness in the medium radiofrequency range. A qualitative comparison has been performed with results obtained by other authors in the case of collinear acoustooptic interaction.

Collinear and noncollinear multifrequency acousto-optic interaction in guided-wave Bragg cells

Mario Nicola Armenise;Vittorio M. N. Passaro
1996

Abstract

In this work, a generalized model of acoustooptic multifrequency interaction in wave-guiding structures is described. The model, which is based on the generalized coupled model theory, can evaluate the diffraction efficiency in Bragg regime when a multifrequency signal is applied to the interdigitated transducer deposited on the optical waveguide surface. The influence of fabrication parameters of Ti:LiNbO3 waveguides on the diffraction efficiency and on the linear dynamic range of acoustooptic multifrequency Bragg cells has been also considered under monomodal propagation condition. Our results assert that the best performance in terms of linear dynamic range can be obtained on Ti:LiNbO3 waveguides having weak refractive index change and small initial titanium thickness in the medium radiofrequency range. A qualitative comparison has been performed with results obtained by other authors in the case of collinear acoustooptic interaction.
2nd International Conference on Optical Information Processing
0-8194-2375-0
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11589/14021
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