Abstract
We report experimental studies on the photorefractive response of KNbO3 doubly doped with manganese and rubidium, iron and rubidium, respectively. Two-beam coupling response time in KNbO3:Mn:Rb is 3 to 10 times shorter while the two-beam coupling gain coefficient remains almost the same when compare with that in KNbO3:Mn. On the other hand, under similar conditions, two-beam coupling response time in KNbO3:Fe:Rb is 6 times faster than that in KNbO3:Fe.
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