The technical objectives of this program are to establish the synthesis and crystal growth parameters required to produce tmal3(bo3)4. the crystals will then be evaluated in terms of standard spectroscopic measurements for laser applications. in particular, line widths, line strengths and… More

The inter-relationship of hydroxl (oh-) content in ktp with the ionic conductivity, optical absorption at ( 4oo-5oonm ) and the onset of "grey track" formation will be determined. measurements will be made on crystals grown by the hydrothermal, and high temperature solution methods. the effects of… More

There is a need for optical crystals, having large nonlinear coefficients for operation as optical parametric oscillaters (opo) in the mid ir region (1.5 to 5.0 microns). single crystals of ktioaso4 (kta) have been shown to have superior transmission in this optical region, however, the presence of… More

Phase I will study tailoring the refractive index elliposoid of KTP to permit Type II phase matching at wavelengths shorter than 900nm, thereby permitting the SHG of laser diodes and Ti:Al2O3 solid state lasers. The system of solid solutions from mixing KTP with CsTiOPO4 will be studied and crystals… More

THE HIGH TEMPERATURE SOLUTION (HTS) METHOD WILL BE USED TO PRODUCE CRYSTALS OF Li6Y(BO3)3 DOPED WITH Nd+3 FOR SOLID STATE LASER APPLICATIONS. A SUITABLE SOLVENT SYSTEM BASED ON LiF-LiBO3 WILL BE DEVELOPED TO GIVE OPTIMUM SIZE CRYSTALS. THE EFFECT OF Nd+3 CONCENTRATION ON CRYSTAL GROWTH AND LASER… More

KNbB2O6 (KNB) is a new nonlinear optical material with high optical transparency, large birefringence, large nonlinear optical coefficients and is non-hygroscopic. This material is an excellent potential substitute for LBO in high average power nonlinear optical devices, like third harmonic… More

There is a need for optical crystals, having large nonlinear coefficients and low optical absorption in the mid IR region (2-5 m). Crystals of KTA have shown promise in this application, however, improved optical transmission is still required. The synthesis, crystal growth and characterization of… More

The use of ZnGeP2 in nonlinear optical applications has been limited in the past due to an extrinsic absorption in the near infrared. Defect studies of ZnGeP2 indicate that the extrinsic absorption is due to nonstoichiometry (as a result of high volatility of some components at the temperatures… More

There is a need for optical materials with large nonlinear coefficients and high laser damage thresholds for tunable laser operation in the 2-5um region. This proposal describes a new member of the KTP family CsZrOAsO4 (CZA), which is expected to have superior properties in comparison to KTP. An… More

The objective of the proposed effort is to design an all solid-state, eye-safe (1.5 um) laser that will abe superior to existing eye-safe lasers in terms of power, efficiency, cost, and beam quality. The proposed laser system is based on solid-state Raman shifting of Nd:YAG laser radiation using… More