Abstract
A theoretical model is presented to explain the refractive index change in the ion-implanted KTP waveguide, which includes respective contributions of spontaneous polarization, molar polarization and molar volume, and photoelastic effect. Numerical calculations of refractive indices along different crystalline orientations (, , and ) as a function of the lattice damage level, determined by Rutherford back-scattering/channeling technique, are performed based on the results from a set of -cut KTP crystals implanted by 300 keV ions in doses ranging from to . The theoretical results show consistency with the experimental data. To our knowledge, this is the first model to comprehensively describe the ion-implanted KTP planar waveguide.
©2012 Optical Society of America
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