| At present, with the rapid development of information age, the amount ofinformation has also increased sharply and people are seeking high capacity, high-speedstorage medium. However, photopolymer material has been widely attention andresearched due to its superior performance, such as high storage capacity, highdiffraction efficiency, high resolution, low cost, production process simple and recordswithout post-processing, etc. Among them, poly (vinyl alcohol)-acrylamide (PVA/AA)photopolymer material has been described as one of the most close to the applicationholographic storage material because of its unique advantages. This paper mainlystudied the holographic response characteristics of PVA/AA.First, the preparation and preservation of PVA/AA was studied. Withimprovements the fabrication technology, the process of preparation was more simple;obtain the change rule of expiration date by researching the degree of polymerization ofcomponents, changing the temperature and humidity, at the same time, angularselectivity of holographic grating has carried on the theoretical and experimentalresearch. The results show that: the sample we prepared had good humidity resistanceand perfect angular selectivity.And then, the response time of PVA/AA photopolymer was studied withcontinuous laser and modulated laser, by changing the parameters, such as exposureintensity, the degree of polymerization of film-forming material, etc., to obtain thechange rule of response time.Finally, according to the photochemical dynamics process and combination withthe transmittance curve of PVA/AA photopolymer, studied the double photosensitizerPVA/AA photopolymer photochemical dynamics process, through theoretical analysiscan explanation some experimental results. |
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