Undoped and Mg-doped stoichiometric LiTaO₃ with concentrations of 0.5, 0.7, and 1.0 mol % were grown by the double-crucible Czochralski method, and their photorefractive effect was investigated by measuring light-induced birefringence changes. Periodically poled Mg-doped stoichiometric lithium tantalate (PPMgSLT) were fabricated for QPM optical parametric oscillator, whose properties, including slope efficiency and threshold, were measured to investigate influence of photorefractive effect on optical parametric oscillator. The results showed that a concentration of 1 mol % MgO in the melt was enough to suppress photorefractive effect at tens of MW/cm², and the OPO performance of PPMgSLT doped with 0.5 mol % MgO is only 6 % lower than that of PPMgSLT doped with 1 mol % MgO at room temperature, even though light-induced birefringence existed for the crystal doped with 0.5 mol % MgO.

Date Published: 24 August 2006
PDF: 5 pages
Proc. SPIE 6314, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XII, 63141W (24 August 2006); doi: 10.1117/12.683774

Published in SPIE Proceedings Vol. 6314:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications XII
Francis T. S. Yu; Ruyan Guo; Shizhuo S. Yin, Editor(s)