Table of Contents
Physics Research International
Volume 2012 (2012), Article ID 352681, 9 pages
http://dx.doi.org/10.1155/2012/352681
Review Article

Zero Spatial Frequency Limit: Method to Characterize Photopolymers as Optical Recording Material

1Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain
2Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain
3Departamento de Óptica, Farmacología y Anatomía, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain

Received 3 May 2012; Accepted 14 June 2012

Academic Editor: Michael R. Gleeson

Copyright © 2012 Sergi Gallego et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Photopolymers are useful for different holographic applications such as holographic data storage or diffractive optical elements. However, due to the presence of two different phenomena, polymer formation and monomer diffusion, it is difficult to characterize each parameter independently. We propose a direct method based on zero spatial frequency recording, to eliminate the diffusion influence, and on interferometric techniques, both in transmission and in reflection, to obtain quantitative values of shrinkage, polymerization rate, polymer refractive index and relation between intensity and polymerization, and so forth, This method has been implemented in the Holography and Optical Processing Group from the University of Alicante to characterize different photopolymers. In this paper, we present a compilation of the results obtained with this method for different photopolymers and we compare their characteristics.