Nonvolatile holograms in LiNbO3:Fe:Cu by use of the bleaching effect

被引：36

作者：

Liu, D ^{[1
]}

Liu, LR

Zhou, CH

Ren, LY

Li, GG

机构：

[1] Acad Sinica, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

[2] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China

来源：

APPLIED OPTICS | 2002年 / 41卷 / 32期

关键词：

D O I：

10.1364/AO.41.006809

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report our observation of a bleaching effect under an ultraviolet exposure in LiNbO3:Fe:Cu crystals. Two three-step recording-transferring-fixing schemes are proposed to record nonvolatile photorefractive holograms in such crystals. In the schemes two red laser beams and an ultraviolet illumination are used selectively to write the charge grating in the shallow-level Fe centers, to develop the charge grating in the deep-level Cu centers by transferring the charge grating in the Fe centers, and to fix only the charge grating in the Cu centers for unerasable read-out. Experimental results, verifications, and an optimal recording scheme are given. A comparison of the lithium niobate crystals of the same double-doping system of Fe:Mn, Ce:Mn, Ce:Cu, and Fe:Cu is outlined. (C) 2002 Optical Society of America.

引用

页码：6809 / 6814

页数：6

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