We report photorefractive, absorption, and photoconductivity measurements made on a KTa1−xNbxO3:Cu,V sample after a series of reduction and oxidation treatments. All relevant physical parameters that enter into the Kukhtarev model of the photorefractive effect are determined. Photorefractive measurements are compared with those expected from theory. The oxidation–reduction process is modeled, which permits us to determine the heat treatment that is necessary to produce a given index change and response time. We discuss approaches to optimization of the photorefractive sensitivity.
© 1991 Optical Society of America
Original Manuscript: March 1, 1990
Manuscript Accepted: August 15, 1990
Published: March 1, 1991
Victor Leyva, Aharon Agranat, and Amnon Yariv, "Determination of the physical parameters controlling the photorefractive effect in KTa1−xNbxO3:Cu,V," J. Opt. Soc. Am. B 8, 701-707 (1991)