title: Linearity in the response of photopolymers as optical recording media.
abstract: Photopolymer are appealing materials for diffractive elements recording. Two of their properties when they are illuminated are useful for this goal: the relief surface changes and the refractive index modifications. To this goal the linearity in the material response is crucial to design the optimum irradiance for each element. In this paper we measured directly some parameters to know how linear is the material response, in terms of the refractive index modulation versus exposure, then we can predict the refractive index distributions during recording. We have analyzed at different recording intensities the evolution of monomer diffusion during recording for photopolymers based on PVA/Acrylamide. This model has been successfully applied to PVA/Acrylamide photopolymers to predict the transmitted diffracted orders and the agreement with experimental values has been increased.
authors.affiliation: Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante, Apartado 99, E-03080 Alicante, Spain. sergi.gallego@ua.es
authors.forename: Sergi
authors.initials: S
authors.lastname: Gallego
authors.forename: Andrés
authors.initials: A
authors.lastname: Marquez
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Guardiola
authors.forename: Marina
authors.initials: M
authors.lastname: Riquelme
authors.forename: Roberto
authors.initials: R
authors.lastname: Fernández
authors.forename: Inmaculada
authors.initials: I
authors.lastname: Pascual
authors.forename: Augusto
authors.initials: A
authors.lastname: Beléndez
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D016247:Information Storage and Retrieval / Q000379:methods*; D008027:Light; D011108:Polymers / Q000737:chemistry* / Q000528:radiation effects*; D012031:Refractometry / Q000295:instrumentation*
chemical_list: D011108:Polymers