Abstract

Potassium titanyl phosphate (KTP) has become one of the most attractive nonlinear optical materials since it was invented in 1970s because of its excellent optical and mechanical properties.¹ People have used KTP crystals to make frequency-conversion devices and optical modulators.² To extend the applications of KTP to future integrated optical areas, efforts have been made to find a suitable thin film deposition technique to fabricate KTP thin films. Recently, we have successfully obtained KTP thin films by using pulsed excimer laser ablation.³ We report the experimental measurement of the second-order nonlinear optical susceptibility of a thin KTP film deposited on a sapphire (100) substrate. All components of χ² were obtained, showing comparable values with KTP crystal.

© 1996 Optical Society of America