一种红敏光致聚合物全息特性的研究

Study on the holographic characteristics of a red-sensitive photopolymer

摘要: 为了研究以丙烯酸和N,N'-亚甲基双丙稀酰胺共同作为单体的厚约180μm的光致聚合物材料的全息特性,采用记录透射型衍射光栅和进行数字全息存储实验的方法,获得了较为理想的实验结果。结果表明,该光致聚合物材料呈现出较高的衍射效率(大于40%)及较高的灵敏度(约0.01cm2/mJ),且衍射效率达最大后趋于稳定,说明所制的样品均匀性很好,在其中所记录的衍射光栅处于较为稳定的状态,未出现过调制现象及明显的噪音光栅。根据该光致聚合物材料的布喇格偏移,得出样品厚度缩皱百分比约为1.7%;并在所制的样品内进行了数字全息存储,再现图像清晰,误码率约为5.3×10-4。说明该光致聚合物适合数字全息存储。

Abstract: The holographic characteristics of the photopolymer dry film,which is based on acrylic acid and N,N'-methylenebisacrylamide as monomers,was studied by recording the transmission diffraction gratings and carrying out the digital holographic storage.Diffraction efficiency of above 40% and energetic sensitivities of 0.01cm2/mJ was obtained in photosensitive films of 180 μm thickness.The recorded gratings are homogenous without overmodulation and noise gratings.In the terms of the Bragg-mismatch,the thickness shrinkage of 1.7% was obtained with a bit-error rate of about 5.3×10-4.These results show the photopolymer is adaptive to the holographic storage.