Reduced KNbO3 crystals for fast photorefractive nonlinear optics

Voit, E.; Zha, M. Z.; Amrhein, P.; Günter, P.
December 1987
Applied Physics Letters;12/21/1987, Vol. 51 Issue 25, p2079
Academic Journal
Reduced KNbO3 crystals are shown to have the fastest photorefractive response times for applications in the visible wavelength region. Grating build-up times at cw illumination in the microsecond region are reported which allow the use of such crystals for real-time applications. The reduction treatment and a new method for the investigation of the photorefractive homogeneity during reduction are presented.


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