We have developed a new polyvinylalcohol-based photopolymeric holographic recording material. The recording is obtained by the copolymerization of acrylamide and 2-Hydroxyethyl Acrylate (HEA). Diffraction efficiencies near 75% are obtained with exposure energy of 231 mJ/cm2 in materials of 95 μm thickness. The effect of different concentration HEA on the holographic parameters, such as moral absorption coefficient, quantum yield, refractive index modulation, thickness etc., is studied, by applying a nonlinear procedure based on Levenberg Marquardt's algorithms. The addition of HEA can improve the optical quality and increase the thickness of the film, which results in improved storage capacity for holographic optical storage.