Title: | Photorefractive properties of lithium and copper in-diffused lithium niobate crystals | Authors: | Imbrock, Jörg Wirp, Albert Kip, Detlef Krätzig, Eckhard Berben, Dirk |
Language: | eng | Issue Date: | 2002 | Publisher: | Soc. | Document Type: | Article | Journal / Series / Working Paper (HSU): | Journal of the Optical Society of America B | Volume: | 19 | Issue: | 8 | Page Start: | 1822 | Page End: | 1829 | Publisher Place: | Washington, DC | Abstract: | Near-stoichiometric copper-doped lithium niobate crystals are fabricated by in-diffusion of thin layers of evaporated copper and a subsequent vapor transport equilibration treatment. The crystals are heated in a Li-rich atmosphere to increase the Li content. To determine the photorefractive properties, holographic as well as electrical measurements are performed. Saturation values of the refractive-index changes ΔnS, bulk photovoltaic current densities jphv, photoconductivities σ ph, and holographic sensitivities S are measured for light intensities up to 104 W/m2. Comparison with experimental data of congruent crystals indicates that the specific photoconductivity is 15 times larger after a vapor transport equilibration treatment. The specific bulk photovoltaic coefficient β* is 2 times larger, refractive-index changes are 7 times smaller, and the holographic sensitivity is up to 4 times larger. © 2002 Optical Society of America. |
Organization Units (connected with the publication): | Universität Osnabrück | ISSN: | 0740-3224 | Publisher DOI: | 10.1364/JOSAB.19.001822 |
Appears in Collections: | 6 - Publication references (without fulltext) of your publications before HSU |
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