KNbO<sub>3</sub> crystals for photorefractive applications

Marko Zgonik; Carolina Medrano; Michael J. Ewart; Hermann Wuest; Peter Guenter

doi:10.1117/12.200598

1 July 1995 KNbO₃ crystals for photorefractive applications

Marko Zgonik, Carolina Medrano, Michael J. Ewart, Hermann Wuest, Peter Guenter

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Optical Engineering, Vol. 34, Issue 7, (July 1995). https://doi.org/10.1117/12.200598

Abstract

Characterization and optimization of KNbO₃ crystals for photorefractive applications over an extended spectral range is described. Intrinsic properties are used to describe the refractive index response to space-charge field gratings. Extrinsic properties that are important for the photorefractive effect, such as absorption, photoconductivity, charge transport, and trapping, are discussed. Some results on the extended IR response of crystals doped with Fe, Ni, Cu, Ce, Mn, and Co are presented. Post growth annealing at temperatures of 400 to 900°C in a controlled atmosphere is shown to modify the charge-transport parameters, therefore also modifying the response time of photoinduced refractive index changes.

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Marko Zgonik, Carolina Medrano, Michael J. Ewart, Hermann Wuest, and Peter Guenter "KNbO₃ crystals for photorefractive applications," Optical Engineering 34(7), (1 July 1995). https://doi.org/10.1117/12.200598

Published: 1 July 1995

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