为了降低光致聚合物材料的缩皱，进一步提高材料的衍射效率，制备了一种掺杂TiO2纳米颗粒的光致聚合物材料。该材料以亚甲基蓝作为光敏剂，用波长为647 nm的激光对其进行曝光。研究表明，聚合物中掺入TiO2纳米颗粒后，材料的缩皱率明显降低，衍射效率也有所提高：掺入36 nm的TiO2颗粒后，样品的缩皱率由3.2%降为2.4%，衍射效率从68%提高至70.8%；而掺入10 nm的TiO2颗粒后，样品的缩皱率仅为0.8%，衍射效率最高可达78.1%。说明掺入小粒径的TiO2更有助于提高材料的全息特性。

In order to improve the shrinkage properties and the diffraction efficiency of photopolymer material, a photopolymer doped with TiO2 nanoparticle is fabricated. Aparting from using methylene blue trihydrate as photosensitizer, this material is exposed at a wavelength of 647 nm. The experimental results show that the incorporation of TiO2 nanoparticle leads to a significant decrease of the shrinkage and the improvement of diffraction efficiency: the shrinkage is decreased from 3.2% to 2.4% and the diffraction efficiency is increased from 68% to 70.8% in the photopolymer contained with 36 nm TiO2 nanoparticle. However, when the photopolymer doped TiO2 with the size of 10 nm, there are only 0.8% of the shrinkage and the diffraction efficiency amount to 78.1%, which indicates that doped TiO2 nanoparticle with smaller size has more advantages in improving the holographic characteristics than that with the bigger size.