Investigations on electrical and optical properties of pure and rare earth doped rubidium titanyl phosphate single crystals

Abstract

Nonlinear optical materials with large NLO efficiency are required for the fabrication of laser based devices, in recent years the synthesis of nonlinear optical materials has been appreciably investigated than other materials due to their capability of multipurpose application. Single crystals are principally desirable for the NLO process and are also required for lasers, communications, optical parametric oscillator circuits, sensors, light-emitting diodes, and other numerous optical applications. The inorganic single crystal is the most important material widely used in nonlinear optical applications, because they are having higher physical and chemical properties than organic compounds. Rubidium titanyl phosphate is an inorganic single crystal and isomer of alkaline titanyl phosphate (ATiOPO4) family compound which was composed of rubidium (Rb), Titanium (Ti), Phosphorous (P) and Oxygen (O), chemical formula represents RbTiOPO4 and shortly pronounced as RTP. Since the growth of alkaline titanyl phosphate single crystals has passed several decades but it will be continued due to their potential nature for various optical applications. The RTP single crystal is a good material for electro optic application with high repetition rate. The RTP single crystal is considered to be more important than parent KTP single crystals due to its large thermal stability, low ionic conductivity, low dielectric constant, wide range of optical transparency, and high laser damage threshold. However, Due to the formation of the Rb+ vacancy, the RTP crystal exhibits anisotropic behavior in their conductivity, which is reduce the materials efficiency and life time during the SHG. newline