Oscillation of nonvolatile holographic recording in LiNbO₃:Fe:Cu crystals

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• 作者：Xiong Li ; Denghui Xu ; Aicong Geng ; Xiaobai Chen ; Baohe Li ; Zhuqing Jiang ; Shaojie Liu
• 关键词：Holography ; Nonvolatile holographic recording ; Lithium niobate crystals ; Oscillation ; Diffraction efficiency
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：124
• 期：20
• 页码：4397-4399
• 全文大小：722 K

文摘

The oscillation of diffraction efficiency is observed in the nonvolatile holographic recording of lithium niobate crystals doped with iron and copper. The physics of oscillation in doubly doped lithium niobate crystals is studied by using Runge-Kutta methods, and the oscillation can be attributed to the redistribution of electrons in the deeper and shallower traps of the crystals in the initial phase of holographic recording. The effects of Fe concentration and intensity ratio of red beams to UV beam (I_R/I_UV) on the oscillation are investigated theoretically. The results show that with lower Fe concentration, the amplitude of oscillation is larger and with lower intensity ratio I_R/I_UV, the duration of the oscillation is longer.