Photorefractive response and optical damage of LiNbO3 optical waveguides produced by swift heavy ion irradiation
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- Villarroel, J., Carrascosa, M., García-Cabañes, A. et al. Appl. Phys. B (2009) 95: 429. doi:10.1007/s00340-009-3386-2
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The photorefractive behaviour of a novel type of optical waveguides fabricated in LiNbO3 by swift heavy ion irradiation is investigated. First, the electro-optic coefficient r33 of these guides that is crucial in the photorefractive effect is measured. Second, two complementary aspects of the photorefractive response are studied: (i) recording and light-induced and dark erasure of holographic gratings; (ii) optical beam degradation in single-beam configuration. The main photorefractive parameters, recording and erasing time constants, maximum refractive-index change and optical damage thresholds are determined.