We report on the fixing of photorefractive volume holograms in potassium lithium tantalate niobate with ionic gratings and also with ferroelectric domain-reversed gratings. A diffraction efficiency of 55% is obtained with domain reversal in a 2-mm-thick ferroelectric phase K1−yLiyTa1−xNbxO3 crystal doped with Co, V, and Ti. We measured the decay rate of the domain gratings and also of the initial electron gratings and ion gratings. The domain grating decay agrees with Vogel–Fulcher fits. The activation energies for ionic and electronic conductivity are 0.76 and 0.12 eV, respectively.
© 1996 Optical Society of America
Original Manuscript: June 13, 1996
Published: November 15, 1996
Xiaolin Tong, Aharon Agranat, Victor Leyva, Rudolf Hofmeister, Min Zhang, and Amnon Yariv, "Fixing of volume holograms in ferroelectric K1−yLiyTa1−xNbxO3," Opt. Lett. 21, 1860-1862 (1996)