Improvement of sensitivity and refractive-index changes in LiNbO3:Ce:Cu crystals with UV light

被引：1
|
作者：
Dai, CX [1 ]
Liu, LR [1 ]
Liu, DA [1 ]
Chai, ZF [1 ]
Zhou, Y [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
来源：
JOURNAL OF MODERN OPTICS | 2006年 / 53卷 / 07期
关键词：
D O I：
10.1080/09500340500407347
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A nonvolatile recording scheme is proposed using LiNbO3:Ce:Cu crystals and modulated UV light to record gratings simultaneously in two centres and using red light to bleach the grating in the shallow centre to realize persistent photorefractive holographic storage. Compared with the normal UV-sensitized nonvolatile holographic system, the amplitude of refractive-index changes is greatly increased and the recording sensitivity is significantly enhanced by recording with UV light in the LiNbO3:Ce:Cu crystals. Based on jointly solving the two-centre material equations and the coupled-wave equations, temporal evolutions of the photorefractive grating and the diffraction effciency are effectively described and numerically analysed. Roles of doping levels and recording-beam intensity are discussed in detail. Theoretical results confirm and predict experimental results.
引用
收藏
页码：907 / 918
页数：12
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