Cr:KNSBN晶体两波耦合及其图像存储  

Two-wave Coupling and Image Storage in Cr:KNSBN Crystal

作　　者：郭庆林[1] 魏丽静[1] 苏红新[1] 郭建新[1] 张金平[1] 怀素芳[1] 傅广生[1] 

机构地区：[1]河北大学物理科学与技术学院,保定071002

出　　处：《人工晶体学报》2006年第4期812-815,共4页Journal of Synthetic Crystals

基　　金：河北省科技厅(No.32135104)资助项目

摘　　要：本文以He-Ne 632.8nm激光为写入光,在非同时读出条件下,实验研究了e偏振光写入Cr:KNSBN晶体两波耦合过程中信号光和泵浦光的透射光强随时间的变化,以及单束泵浦光的透射光强随时间的变化,实验结果表明,泵浦光损失的能量几乎全部转移到了信号光方向,基本不存在散射光;并以二值化图像作为物在晶体内进行了图像存储实验,其再现图像清晰,信噪比高,没有观察到扇形光的影响。By using the extraordinary polarized He-Ne 632.8nm laser beam in the Cr： KNSBN crystal, me transmitted intensity of pump beam and signal beam as a function of time in the two-wave coupling process were experimentally investigated, and the transmitted intensity of pump beam as a function of time was also investigated when the signal beam was shutted. It is shown that the lost pump beam energy was totally transferred into the signal beam without scattering beam. An image storage experiment of a binary image was performed, and a clear reconstructed image with high signal-to-noise ratio and without scattering beam impacting was obtained.

关 键 词：Cr:KNSBN晶体 两波耦合 光扇效应 图像存储 

分 类 号：O734[理学—晶体学]