Abstract
Abstract The light induced index changes in KNbO3: Fe have been investigated by the holographic technique using optical power densities up to I = 300 W/cm2 at λ = 488 nm. For undoped crystals the light induced index change is smaller than 3 λ 106 for all light intensities used. The index change can be drastically reduced or enhanced by applying a small dc field along the ±c axis.
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