Study of the process of holographic formation of multiplexed chirped multilayer diffraction structures formed in a photopolymer material with liquid crystals

A generalized analytical model is presented that takes into account the temporary change in the initial conditions of holographic formation due to the photoinduced change in the optical absorption of multiplexed chirped multilayer inhomogeneous holographic diffraction structures formed in a photopolymer material with a high proportion of nematic liquid crystals. Using numerical simulation, it was shown that during the formation of each individual diffraction grating in each individual layer, the refractive index profile can have a two-dimensional inhomogeneity, which is caused by both the photoinduced absorption of the material and the phase inhomogeneity of the recording radiation. Thus, the developed analytical model allows one to determine in advance the type of grating profile for chirped multilayer holographic diffraction structures, which is necessary for a more accurate determination of the diffraction characteristics of such structures.