双波长敏感的光致聚合物全息存储材料

介绍了一种以聚乙烯醇为粘结剂，丙烯酰胺和亚甲基双丙烯酰胺作为单体，赤藓红和亚甲基蓝作为光引发剂，三乙醇胺作为共引发剂的光致聚合物材料。材料能同时对红光和绿光敏感，用红光和绿光分别对材料曝光，测得的两种衍射效率分别不低于30％，灵敏度不低于25cm^2／J。该材料对红光的最大响应空间频率为2274 lp／mm，相应的衍射效率为27．73％，响应范围为1600∽2800lp／mm；对绿光的最大响应空间频率为2350 lp／mm．相应的衍射效率为25、72％，响应范围为1700∽3000 lp／mm。在材料的同一点上进行红光和绿光的波长复用全息存储，当用红光或绿光再现时单幅图像清晰，信噪比高，两幅图像之间无任何干扰，该材料适合双波长全息存储。

Photopolymer Holographic Recording Material Sensitived to Two Wavelength

A novel type of photopolymer holographic recording materials sensitive to red light and green light is presented. The photopolymerizable system comprises two monomers, a photoinitiation system, and an inactive component referred to as a binder. Diffraction efficiencies are no less 30%, and sensitivities are no less 25 cm2/J when exposed to red light and green light respectively. Spatial frequencies of red light ranged from 1600～2800 lp/mm, and the best response spatial frequency is 2274 lp/mm and the corresponding diffraction efficiency is 27.72%. Spatial frequencies of green light ranged from 1700～3000 lp/mm, and the best response spatial frequency is 2335 lp/mm and the corresponding diffraction efficiency is 25.72%. There is no crosstalk among reconstruction images when recording in the same point by red and green light, so the photopolymer is promising to two-wavelength multiplexing holographic storage.