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Proceedings Paper

Modeling of guided-wave acousto-optic multifrequency interaction in Bragg regime
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Paper Abstract

In this work the modeling of non collinear acoustooptic multifrequency interaction in wave- guiding structures is presented. The new model, which is based on the generalized coupled mode theory, allows us to evaluate the diffraction efficiency in Bragg regime when a multifrequency signal is applied to the interdigitated transducer deposited on the optical waveguide surface. The dependence of diffraction efficiency of the output orders on the intermodulation factors and on the transducer driving radiofrequencies has been investigated. The influence of fabrication parameters of Ti:LiNbO3 waveguides on the linear dynamic range of acoustooptic multifrequency modulators has been extensively studied under monomodal propagation condition. Our results assert that the best performance in terms of linear dynamic range (approximately equals 43 dB) can be obtained on Ti:LiNbO3 waveguides having weak refractive index change ((Delta) n < 0.001), small initial titanium thickness (< 100 angstroms) and medium enter radiofrequency (approximately equals 500 MHz).

Paper Details

Date Published: 10 January 1996
PDF: 8 pages
Proc. SPIE 2695, Functional Photonic and Fiber Devices, (10 January 1996); doi: 10.1117/12.229962
Show Author Affiliations
Vittorio M. N. Passaro, Politecnico di Bari (Italy)
Mario Nicola Armenise, Politecnico di Bari (Italy)

Published in SPIE Proceedings Vol. 2695:
Functional Photonic and Fiber Devices
S. Iraj Najafi; Mario Nicola Armenise, Editor(s)

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