通过全息图像研究了预曝光对丙烯酰胺光聚合物全息光栅的增强及其稳定性的影响。以全息图的相对衍射强度为参数来表征材料内部的扩散过程。曝光结束后使用非相干光读取光栅,相对衍射强度提高数十倍。优化了预曝光能量和读取强度,定量分析了相对衍射强度对单体浓度的依赖性。单体分子的扩散是影响全息图衍射强度增强的重要因素,可以提高丙烯酰胺光聚合物体系的全息性能。本研究可促进丙烯酰胺光聚合物在全息光学元件开发中的实际应用。The enhancement of acrylamide photopolymer holographic gratings by pre-exposure and their stability were investigated by holograms. The relative diffraction intensity of the hologram was used as a parameter to characterize the diffusion process inside the material. After exposure, the grating is read with incoherent light, and the relative diffraction intensity is increased by tens of times. The pre-exposure energy and reading intensity were optimized, and the dependence of relative diffraction intensity on monomer concentration was quantitatively analyzed. The diffusion of monomer molecules is an important factor affecting the enhancement of hologram diffraction intensity, which can improve the holographic properties of acrylamide photopolymer system. This study can facilitate the practical application of acrylamide photopolymers in the development of holographic optical components.
