Growth and electric-elastic properties of KTiOAsO4 single crystal

Abstract

We report the successful growth of high quality potassium titanyl arsenate, KTiOAsO4 (KTA) crystals with size of 34×67×72 mm3 through a K6As4O13 based flux method. The dielectric, piezoelectric, and elastic constants of KTA crystal were determined by the resonance technique and impedance analysis, respectively. The thermal dependence of the elastic constants were also determined by the transmission method over −50–110 °C. The first, second, and third order temperature coefficients of the elastic constants were calculated (T0=25 °C).

Ridge Waveguides and Y-Branch Beam Splitters in KTiOAsO4 Crystal by 15 MeV Oxygen Ion Implantation and Femtosecond Laser Ablation

“…A S AN excellent nonlinear optical crystal, potassium titanyl arsenate (KTiOAsO 4 or KTA) possesses large nonlinear optical and electro-optical coefficients, as well as high damage threshold. In comparison to the more well-known potassium titanyl phosphate (KTiOPO 4 or KTP) crystal, the KTA has the additional advantage of reduced absorption at the wavelength of 2 to 5 µm range [1], [2]. In addition, a number of attractive nonlinear optical applications involving KTA crystal have been realized for second harmonic generation (SHG), sum and difference frequency generation (SFG and DFG), optical para-metric oscillation/amplification (OPO/OPA), and electro-optical switching involving mid-infrared (MIR) wavelengths [3]- [6].…”