Shrinkage Simulation of Holographic Grating Using Diffusion Model in PQ-PMMA PhotopolymerZepeng Wei, Dan Yu, Xiaolan Li, Yanwen Wang, Zhuang Chen, Yaohui Geng and Jiang LvMATEC Web of Conferences, 25 (2015) 02010DOI: https://doi.org/10.1051/matecconf/20152502010