Dynamics analysis of erythrosine B sensitized photopolymer holographic gratings

Ke Chen; Jian-Qun Cheng; Yan Wang; Ming-Ju Huang

doi:10.1117/12.822147

19 March 2009 Dynamics analysis of erythrosine B sensitized photopolymer holographic gratings

Ke Chen, Jian-Qun Cheng, Yan Wang, Ming-Ju Huang

Proceedings Volume 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage; 71250C (2009) https://doi.org/10.1117/12.822147
Event: Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 2008, Wuhan, China

Abstract

The dynamic theoretical model of photochemical and hologram formation in holographic photopolymer is established, and the dynamic development process of holographic storage in the photopolymer is discussed with the model. A holographic photopolymer sensitized by erythrosine B is prepared, which is composed of acrylamide as monomer, ployvinylalcohol as binder, triethanolamine as initiator. The influence of the exposure intensity on holographic storage characteristics is analyzed. The experimental data of transmittance and diffraction efficiency of the fabricated photopolymer with different exposure intensities are obtained. By means of fitting the experimental data of transmittance and diffraction efficiency as a function of time with five exposure intensities at a wavelength of 514nm, the variation of photochemistry and photopolymerization diffusion dynamic parameters such as the molar-absorption coefficient ε, quantum yield Φ, photobleaching coefficient k_p, polymerization rate k₀ and diffusion time constant τ_D is presented. The research results show that as the exposure intensity increases, so do also ε, k_p and k₀, but Φ becomes smaller. And τ_D has no obvious changes except the sample is overexposed. This material has the characteristics of longer diffusion times for the monomer to travel from the unexposed to the exposed zones than that in the case of other polymeric materials.

Citation Download Citation

Ke Chen, Jian-Qun Cheng, Yan Wang, and Ming-Ju Huang "Dynamics analysis of erythrosine B sensitized photopolymer holographic gratings", Proc. SPIE 7125, Eighth International Symposium on Optical Storage and 2008 International Workshop on Information Data Storage, 71250C (19 March 2009); https://doi.org/10.1117/12.822147

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