Comparison of Two-Color Hologram Lifetimes of Near-Stoichiometric Lithium Niobate and of Tantalate Crystals
Applied Optics, Vol. 43, Issue 31, pp. 5778-5783 (2004)
http://dx.doi.org/10.1364/AO.43.005778
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Abstract
Lifetimes of two-color nonvolatile holograms recorded in undoped or in slightly doped near-stoichiometric lithium niobate and tantalate crystals were measured and compared by extrapolation of the high-temperature data. A proton-compensation mechanism dominated the dark decay and yielded similar activation energies, of 1.05 and 1.10 eV, for near-stoichiometric lithium niobate and tantalate crystals, respectively. The lifetime of holograms in lithium tantalate was 1 order of magnitude longer than that in lithium niobate with the same proton concentration, which was consistent with our theoretical estimation. The projected lifetime of two-color holograms in lithium tantalate without observable OH− absorption is longer than 50 years.
© 2004 Optical Society of America
OCIS Codes
(090.2900) Holography : Optical storage materials
(160.5320) Materials : Photorefractive materials
(210.2860) Optical data storage : Holographic and volume memories
Citation
Youwen Liu, Kenji Kitamura, Shunji Takekawa, Ganesan Ravi, Masaru Nakamura, Yasunori Furukawa, and Hideki Hatano, "Comparison of Two-Color Hologram Lifetimes of Near-Stoichiometric Lithium Niobate and of Tantalate Crystals," Appl. Opt. 43, 5778-5783 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-31-5778
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