Study on the partial self-recovery process in Fe-doped lithium niobate crystals

We study the temperature and pump-intensity dependence of the temporal evolution of photoinduced light scattering in congruent, hafnium-codoped and near-stoichiometric LiNbO sub(3):Fe crystals. A partial self-recovery process is found in the evolution trend of photoinduced light scattering in all cr...

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Published inOptical materials express Vol. 6; no. 5; pp. 1545 - 1551
Main Authors Jing, Jianli, Fan, Bolin, Wu, Meng, Yan, Wenbo, Shi, Lihong, Wang, Donghui, Li, Shaobei, Wang, Xuliang, Chen, Hongjian
Format Journal Article
LanguageEnglish
Published 01.05.2016
Subjects
Acceleration
Activation
Crystals
Evolution
Light scattering
Modulation
Saturation
Scattering
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Summary:We study the temperature and pump-intensity dependence of the temporal evolution of photoinduced light scattering in congruent, hafnium-codoped and near-stoichiometric LiNbO sub(3):Fe crystals. A partial self-recovery process is found in the evolution trend of photoinduced light scattering in all crystals at room temperature while it disappears at -190 [degrees]C or above 120 [degrees]C. Moreover, a "scattering acceleration effect" is found for both Hf-doped and near-stoichiometric crystals. Basing the saturation refractive-index modulation the partial self-recovery process is explained by the slow recombination of light-induced space charges of the noise gratings with high wave vectors. The "scattering acceleration effect" is connected with the activation of the protons located around Fe ions and their impact on the photoconductivity.
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ISSN:2159-3930
2159-3930
DOI:10.1364/OME.6.001545