基于稀土离子上变频效应的光盘

H. Ho, W. Wong, Shu-yuen Wu, E. Pun
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引用次数: 0

摘要

研究了红外到可见光上转换在稀土(Ho/sup 3+//Yb/sup 3+/)共掺杂TeO/sub x/溶胶-凝胶薄膜光存储中的应用。研究了稀土共掺杂TeO/sub - x/溶胶-凝胶薄膜制备的存储层光盘的最小比特尺寸和上转换效率。多层体系结构的可能性也进行了研究。选择TeO/sub x/薄膜是基于稀土掺杂硫系玻璃具有较高的上转换效率。上转换效应的非线性特性使得信号区的“有效”光斑尺寸有可能减小到小于衍射所限制的尺寸,从而导致存储层的超分辨率和存储密度的增加。
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Optical storage disc based on the frequency up-conversion effect from rare earth ions
The application of infrared-to-visible upconversion in rare earth (Ho/sup 3+//Yb/sup 3+/) co-doped TeO/sub x/ sol-gel thin film for optical storage has been investigated. Optical discs with the storage layer made from rare-earth co-doped TeO/sub x/ sol-gel thin films have been studied in terms of minimum bit-size and up-conversion efficiency. The possibility of a multi-layered architecture has also been investigated. The choice of using TeO/sub x/ thin films is based on the higher up-conversion efficiency in the rare earth doped chalcogenide glasses. The nonlinear properties of the up-conversion effect lead to the possibility of reducing the 'effective' spot size of the signal region, smaller than that limited by diffraction, hence leading to super-resolution in the storage layer and increased storage density.
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