Influence Of Protons On The Photorefractive Properties Of LiNbO[sub]3[/sub]

Ralph Sommerfeldt; Eckhard Kratzig

doi:10.1117/12.961375

14 December 1989 Influence Of Protons On The Photorefractive Properties Of LiNbO₃

Ralph Sommerfeldt, Eckhard Kratzig

Proceedings Volume 1126, Electro-Optic and Magneto-Optic Materials and Applications; (1989) https://doi.org/10.1117/12.961375
Event: 1989 International Congress on Optical Science and Engineering, 1989, Paris, France

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.961375

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