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14 December 1989 Influence Of Protons On The Photorefractive Properties Of LiNbO3
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Proceedings Volume 1126, Electro-Optic and Magneto-Optic Materials and Applications; (1989)
Event: 1989 International Congress on Optical Science and Engineering, 1989, Paris, France
The photorefractive properties of LiNb03:Fe bulk crystals with different proton concentrations and of proton-exchanged planar waveguides fabricated with LiNb03:Fe substrates are investigated. The saturation values of refractive index change, the photoconductivity, the photorefractive sensitivity and the photovoltaic current density of bulk LiNb03:Fe crystals are only determined by the Fe impurities and do not depend on proton concentration. But the dark conductivity is increased by protons. In Li1-xHxNb03 waveguides we find after fabrication a strong decrease of the saturation value of light-induced refractive index change due to an increase of dark conductivity and a decrease of the electrooptic coefficients. Absorption measurements indicate that mainly Fe3+ ions are present in the waveguide region. After annealing photorefractive index changes increase and the dark conductivity decreases again.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ralph Sommerfeldt and Eckhard Kratzig "Influence Of Protons On The Photorefractive Properties Of LiNbO3", Proc. SPIE 1126, Electro-Optic and Magneto-Optic Materials and Applications, (14 December 1989);

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