Visualizations of Light-induced Refractive Index Changes in Photorefractive Crystals Employing Digital Holography |
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作者姓名: | 赵建林 张鹏 周俭波 杨德兴 杨东升 李恩普 |
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作者单位: | DepartmentofAppliedPhysics,NorthwesternPolyteclmicalUniversity,Xi‘an710072 |
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摘 要: | We propose a novel approach to visualize the light-induced refractive index changes in photorefractive crystals employing digital holography. The holograms formed in a Mach-Zehnder interferometer are recorded by a two-dimensional CCD camera. From these holograms, the phase differences, which contain the information of the index changes in photorefractive crystals, are determined by utilizing digital holographic interferometry. Then the two-dimensional visualizations of index changes in the crystals can be obtained. This method is successfully demonstrated in LiNbO3:Fe, KNSBN:Ce and SBN:Cr crystals.
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关 键 词: | 光折射晶体 光致折射指数变化 数字全息术 信息光学 LiNbO3:Fe晶体 KNSBN:Ce晶体 SBN:Cr晶体 |
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