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对光折变晶体 Ce:KNSBN中两束 e偏振简并非相干光的前向耦合进行了理论分析和实验研究 ,并通过非相干光耦合作用在实验上获得了亮环和暗环的衍射图样 ,从而获得了一种利用非相干光擦除来克服光折变晶体中扇形效应的简便方法。
The forward coupling of two degenerate incoherent incoherent light beams in photorefractive crystal Ce: KNSBN was theoretically analyzed and experimentally studied. The diffraction patterns of bright and dark circles were experimentally obtained by incoherent optical coupling, Thus, a simple and convenient method to overcome the fan-shaped effect in photorefractive crystals by using incoherent light erase is obtained.