Abstract

Light-induced absorption changes in iron-doped lithium tantalate crystals are generated with ultraviolet nanosecond pulses of a frequency-tripled Nd:YAG laser. The relaxation follows a stretched-exponential function in which the stretching factor is approximately 0.2–0.3. The dependences of the relaxation of the absorption changes on light intensity, temperature, and concentration of the Fe dopant are investigated. A simple model to account for distance-dependent transitions between populated shallow levels and deep traps is proposed to explain the experimental data. The consequences of the results presented are discussed with respect to the application of two-color holography for nonvolatile data storage.

© 2001 Optical Society of America

Nonvolatile holographic storage in photorefractive lithium tantalate crystals with laser pulses

J. Imbrock, S. Wevering, K. Buse, and E. Krätzig
J. Opt. Soc. Am. B 16(9) 1392-1397 (1999)

Nonvolatile holographic storage in iron-doped lithium tantalate with continuous-wave laser light

J. Imbrock, D. Kip, and E. Krätzig
Opt. Lett. 24(18) 1302-1304 (1999)

Ultraviolet-light-gating two-color photorefractive effect in Mg-doped near-stoichiometric LiNbO₃

Yasuo Tomita, Steven Sunarno, and Guoquan Zhang
J. Opt. Soc. Am. B 21(4) 753-760 (2004)

Comparison of two-color hologram lifetimes of near-stoichiometric lithium niobate and of tantalate crystals

Youwen Liu, Kenji Kitamura, Shunji Takekawa, Ganesan Ravi, Masaru Nakamura, Yasunori Furukawa, and Hideki Hatano
Appl. Opt. 43(31) 5778-5783 (2004)

Infrared holographic recording in lithium tantalate crystals by means of the pyroelectric effect

Helge A. Eggert, Jörg Imbrock, Christoph Bäumer, Hartmut Hesse, and Eckhard Krätzig
Opt. Lett. 28(20) 1975-1977 (2003)