Photorefractive properties for holographic application of Ce:Fe:LiNbO3 crystals with various [Li]/[Nb] ratios |
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| Authors: | Zhaopeng Xu Jie Gong Shiwen Xu Yuheng Xu |
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| Institution: | 1. College of Information Science and Engineering, State Key Lab Metastable Material Science Technology, Yanshan University, Qinhuangdao 066004, PR China;2. Department of Electronic Science and Technology, Harbin Institute of Technology, Harbin 150001, PR China;1. Department of Physics, University of Central Florida, Orlando, FL, 32816, USA;2. Department of Physics and Astrophysics, University of Delhi, New Delhi, 110007, India;3. Department of Physics, Hindu College, University of Delhi, New Delhi, 110007, India;4. Physics Department, Atma Ram Sanatan Dharma College, University of Delhi, New Delhi, 110021, India;5. Physics Department Miranda House, University of Delhi, New Delhi, 110007, India |
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| Abstract: | Ce:Fe:LiNbO3 crystals with various Li]/Nb] ratios were grown by the Czochralski method from melts having compositions varying between 48.6 and 58 mol% Li2O. The Ce, Li and Nb concentrations in the grown Ce:Fe:LiNbO3 crystals were analyzed by the inductively coupled plasma atomic emission spectrometer (ICP-AES). It was found that as the Li]/Nb] ratio increases in the melt, the Li]/Nb] ratio in the crystal and the distribution coefficients of Ce ions increase also. The photorefractive properties of the Ce:Fe:LiNbO3 crystals were experimentally studied by the two-wave coupling method. The results show that as the Li]/Nb] ratio increases, the dynamic range decreases, but the photorefractive sensitivity and the signal-to-noise ratio improve. In a coherent volume 0.192 cm3 of a Ce:Fe:LiNbO3 crystal with Li]/Nb] ratio of 1.2, 3800 holograms with 800×600 pixels have been successfully multiplexed in a compact volume holographic data storage system. |
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