Holographic photopolymers become promising materials for future production of holographic devices. And the
mechanism of hologram formation in photopolymers has been broadly studied. In this paper we present a simplified
model in order to describe the monomer diffusion and photopolymerization. According to this model, the main effect the
modulation of refraction index comes from the intensity of recording beams and fringe spacing during recording. So we
quantitatively analyzed the effect of recording intensity and fringe spacing on diffraction efficiency, and carried out
validating experiments with a novel blue-green sensitized photopolymer. Holographic gratings were recorded with
different recording beam intensities and different fringe spacing respectively, and corresponding diffraction efficiency
were obtained. By fitting the experimental results to the model, we obtained the material parameters, such as diffusion
time constant, polymerization coefficient. The experimental results indicated that a higher recording intensity resulted in
a faster growth of grating and lower saturated diffraction efficiency. And saturated diffraction efficiency increased with
the increasing of fringe spacing. These agreed well with theoretical expectation. This study improves the understanding
of recording process and consequently allows building more accurate holographic components in the photopolymers.
Dark diffusion transient in a blue-green sensitized holographic photopolymer was investigated based on a previously published theoretical model of monomer diffusion. Diffusion time constant of monomers was obtained by fitting the experimental data to the theoretical model. According to the results of diffusion time constant, experiments were designed and conducted to investigate the evolution of grating efficiency with non-continuous holographic exposure. The experimental result indicated that the saturated diffraction efficiency of a non-continuously exposed grating is about 1.25 times of that of continuously exposed one under the same recording condition.