Title :
Hybrid mode phase matching and effective nonlinear coefficient for second harmonic generation in biaxial waveguides
Author :
Maldonado, Theresa A. ; Ciumac, Mariana
Author_Institution :
Dept. of Electr. Eng., Texas Univ., Arlington, TX, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
Phase matching between fundamental and second harmonic hybrid guided modes in nonlinear biaxial planar waveguides is determined for the first time based on principal axes orientations of the film, substrate, and cover. We have derived an expression for the effective nonlinear coefficient Deff of hybrid modes in a biaxial waveguide and have calculated this coefficient numerically along the effective index phase match loci for these modes supported by a POM waveguide surrounded by isotropic media. The optimum phase matching orientations are determined for a fixed waveguide thickness. Dispersion of the principal indexes is considered
Keywords :
birefringence; light propagation; nonlinear optics; optical dispersion; optical harmonic generation; optical planar waveguides; optical waveguide theory; 3-methyl-4-nitropyridine-l-oxide; POM waveguide; biaxial waveguides; cover; effective index phase match loci; effective nonlinear coefficient; film; fixed waveguide thickness; fundamental modes; hybrid mode phase matching; isotropic media; nonlinear biaxial planar waveguides; optimum phase matching orientations; principal axes orientations; principal index dispersion; second harmonic generation; second harmonic hybrid guided modes; substrate; Frequency conversion; Nonlinear optics; Optical films; Optical frequency conversion; Optical harmonic generation; Optical mixing; Optical waveguide theory; Optical waveguides; Planar waveguides; Substrates;
Journal_Title :
Lightwave Technology, Journal of
