Title :
Theory on phase-matched second-harmonic generation in biaxial planar waveguides
Author_Institution :
Inst. for Quantum Electron., Fed. Inst. of Technol., Zurich, Switzerland
fDate :
1/1/1999 12:00:00 AM
Abstract :
A theoretical study on the optimization of second harmonic generation (SHG) in a planar waveguide in a biaxial nonlinear material is presented. Numerically computed curves show the dependence of the SHG efficiency on the condition of lateral focusing in the planar waveguide, of double refraction and of phase matching. The calculations take full account of double refraction and diffraction in the paraxial approximation in the planar guide. It is shown that in the absence of double refraction and under optimum focusing conditions the generated second harmonic power increases in proportion to L3/2, where L is the length of the planar waveguide
Keywords :
approximation theory; birefringence; optical focusing; optical harmonic generation; optical planar waveguides; optical waveguide theory; optimisation; SHG efficiency; biaxial nonlinear material; biaxial planar waveguides; double refraction; generated second harmonic power; lateral focusing; numerically computed curves; optimization; optimum focusing conditions; paraxial approximation; phase matching; phase-matched second-harmonic generation; planar waveguide length; theoretical study; Birefringence; Frequency conversion; Nonlinear optics; Optical diffraction; Optical harmonic generation; Optical planar waveguides; Optical refraction; Optical waveguides; Planar waveguides; Waveguide theory;
Journal_Title :
Quantum Electronics, IEEE Journal of
