Title :
Modeling of noncollinear multifrequency acoustooptic interaction in guided-wave Bragg cells
Author :
Passaro, Vittorio M N ; Matteo, Anna Maria ; Armenise, Mario N.
Author_Institution :
Dipt. di Elettrotecnica, Politecnico di Bari, Italy
fDate :
11/1/1997 12:00:00 AM
Abstract :
We present an original detailed theoretical modeling of guided-wave noncollinear acoustooptic (AO) interaction produced by a multifrequency surface acoustic wave (SAW) in planar guided-wave structures. The modeling of the multifrequency AO interaction is based on a modified version of the coupled-mode theory. The first- and third-order diffraction efficiency and optimum dynamic range of the Bragg cell have been calculated as a function of acoustic power, acoustic radiofrequency, and optical waveguide parameters in Y-cut Ti:LiNbO3 planar waveguides. Polynomial approximations, describing the first and third order diffraction efficiency versus normalized acoustic power in the cases of two- and three-frequency interactions, are derived and presented for the first time for arbitrarily large RF signals
Keywords :
acousto-optical deflectors; acousto-optical effects; acousto-optical modulation; acousto-optical signal processing; approximation theory; coupled mode analysis; light diffraction; lithium compounds; optical planar waveguides; optical waveguide components; optical waveguide theory; polynomials; spectral analysis; surface acoustic wave signal processing; surface acoustic wave waveguides; titanium; LiNbO3:Ti; RF signals; Y-cut Ti:LiNbO3 planar waveguides; acoustic power; acoustic radiofrequency; coupled-mode theory; first-order diffraction efficiency; guided-wave Bragg cells; modeling; multifrequency surface acoustic wave; noncollinear multifrequency acoustooptic interaction; normalized acoustic power; optical waveguide parameters; optimum dynamic range; planar guided-wave structures; polynomial approximations; third-order diffraction efficiency; three-frequency interactions; two-frequency interactions; Acoustic diffraction; Acoustic waveguides; Acoustic waves; Optical diffraction; Optical planar waveguides; Optical surface waves; Optical waveguide theory; Optical waveguides; Planar waveguides; Surface acoustic waves;
Journal_Title :
Lightwave Technology, Journal of
