四种光敏剂共敏化光致聚合物的全息性能研究  

Holographic Characteristics of the Photopolymer Sensitized by Four Photosensitizers

作　　者：肖勇[1] 王素莲[1] 唐道广[1] 王艳[1] 黄明举[1] 

机构地区：[1]河南大学物理与电子学院光学与光电子技术研究所,河南开封475004

出　　处：《中国激光》2009年第4期928-933,共6页Chinese Journal of Lasers

基　　金：河南大学自然科学基金重点项目(06ZDZR002)资助课题

摘　　要：基于增宽光致聚合物存储材料的感光光谱范围,增大材料存储密度,制备了四种共同敏化的光致聚合物样品,该样品的最大衍射效率在632.8 nm,514.5 nm和448 nm三种波长下分别高达61%,47%和44%,曝光灵敏度分别为1.92×10^(-3),9.28×10^(-4)和5.63×10^(-4),折射率调制度分别为4.7×10^(-4),3.34×10^(-4)和2.93×10^(-4)。将该敏化宽带增宽光致聚合物样品的曝光特性与各光敏剂敏化样品的作对比,发现其衍射效率、曝光灵敏度、折射率调制度等曝光性能有所降低;同时初步研究了不同厚度的共敏化宽带敏感光致聚合物在相同曝光光强下的性能变化,所得结果都为多波长复用及稀疏波长-角度复用提供了可靠的实验依据。A novel photopolymer sensitized by four photosensitizers is prepared in order to broaden the photosensitive spectrum and increase the recording density and capacity. The holographic recording properties such as diffraction efficiency, exposure sensitivity and the refractive index of the photopolymer are studied. The results show that the maximum diffraction efficiencies reach 61%, 47% and 44 %, at three different exposure wavelengths of 632.8 nm,514.5 nm, and 488 nm. The sensitivities reach 1.92×10^-3, 9.28×10^-4, and 5.63×10^-4. The refractive indexes reach 4.7 × 10^-4 , 3.34× 10^-4, and 2.93×10^-4 . Comparing the characteristics of the samples such as diffractive efficiency, exposure sensitivity, refractive index modulation ect. , it is found that for performance of the system all the parameters decrease. But the effect on the reconstruction is little. At the same time, the properties of different thickness samples with the same exposure intensity are preliminarily studied. The results show that the broadening photopolymer is propitious to wavelengths multiplexing and sparse-wavelength angle- multiplexing, and all the results provide a reliable test basis.

关 键 词：光全息存储 光致聚合物 光敏剂 曝光特性参数 稀疏波长-角度复用 

分 类 号：O438.1[机械工程—光学工程]