KTP is featured by following properties: u Large nonlinear optical coefficient u High electro-optic coefficient and low dielectric constant u High thermal conductivity u Moisture free, chemically and mechanically stable u Large figure of merit u High electro-optic coefficient and low dielectric constant Applications: u Second harmonic generator of radiation 1.064 μm u Optical parametric oscilator in near IR region up to 4 μm u Different frequency generator in near IR region u E-O Modulators, Optical Switches, Directional Couplers Structure and physics properties of KTP crystal: Crystal structure Orthorhombic, space group Pna21,point group mm2Cell parameters a=6.404Å, b=10.616Å, c=12.814Å, Z=8 Melting point 1172ã¡C incongruent Curie point 936°C Mohs hardness »5 Density 3.01 g/cm3 Color colorless Hygroscopic susceptibility no Specific heat 0.1643 cal/g°C Thermal conductivity 0.13 W/cm/°K Electrical conductivity 3.5x10-8 s/cm (c-axis, 22°C, 1KHz)