Study On Photochemical Kinetics Of Several Photopolymers With Broadband Sensitive Spectral Range

Photopolymer has many advantages: high diffraction efficiency, high photosensitive sensitivity, high refraction modulation, easy fabrication and low cost etc. These advantages make it become the hotspot and focus for people in the field of holographic storage materials, meanwhile photopolymer is also believed to be the most promising and first used as holographic storage materials. More and more scientists and organizations began to focus on the photopolymer materials and some achievements have been done.Based on the summarizing of the present research on the photopolymers, several photopolymers with broadband sensitive spectral range were fabricated. Meanwhile, a certain research on the holographic characteristics and photochemical kinetics of these photopolymers had been done.1. The absorption spectrums of three kinds of dyes were tested. a photopolymer material was fabricated Sensitized by VB2 (sample1). Meanwhile, Sensitized by VB2 and Azure I (sample2).In addition, a VB2 and Azure II sensitized photopolymer for holographic storage was prepared (sample3).2. The photopolymers'experimental values of transmittance in different dyes concentration sensitized by VB2 were tested.3. Through the fitting curves, the photopolymers'values of the molar absorption coefficientε, the quantum yieldφ, the photobleaching coefficient k_p and the scattering loss correlation coefficient T_sf in different dyes concentration sensitized by VB2 were tested ,and the change rules were discussed.4. The photopolymers'experimental values of transmittance in different film thickness sensitized by VB2 and Azure I were tested.5. Through the fitting curves, the photopolymers'values of the molar absorption coefficientε, the quantum yieldφ, the photobleaching coefficient k_p and the scattering loss correlation coefficient T_sf in different film thickness sensitized by VB2 and Azure I were tested ,and the change rules were discussed.6. The photopolymers'experimental values of transmittance in different exposure intensity sensitized by VB2 and Azure II were tested.7.Through the fitting curves, the photopolymers'values of the molar absorption coefficientε, the quantum yieldφ, the photobleaching coefficient k_p and the scattering loss correlation coefficient T_sf in different exposure intensity sensitized by VB2 and Azure II were tested ,and the change rules were discussed.8. The photopolymers'experimental values of transmittance in different exposure wavelength sensitized by VB2 and Azure II were tested.9.Through the fitting curves, the photopolymers'values of the molar absorption coefficientε, the quantum yieldφ, the photobleaching coefficient kp and the scattering loss correlation coefficient Tsf in different exposure wavelength sensitized by VB2 Azure II were tested ,and the change rules were discussed.