Kelly, John V.John V.KellyGleeson, M. R.M. R.GleesonClose, Ciara E.Ciara E.CloseO'Neill, Feidhlim T.Feidhlim T.O'NeillSheridan, John T.John T.SheridanGallego, SergiSergiGallegoNeipp, CristianCristianNeipp2011-12-022011-12-022005 Optic2005-09-05Optics Express1094-4087http://hdl.handle.net/10197/3373The nonlocal polymerization-driven diffusion model (NPDD) has been shown to predict high spatial frequency cut-off in photopolymers and to accurately predict higher order grating components. We propose an extension to the NPDD model to account for the temporal response associated with polymer chain growth. An exponential response function is proposed to describe transient effects during the polymerization process. The extended model is then solved using a finite element technique and the nature of grating evolution examined in the case when illumination is stopped prior to the saturation of the grating recording process. Based on independently determined refractive index measurements we determine the temporal evolution of the refractive index modulation and the resulting diffraction efficiency using rigorous coupled wave theory. Material parameters are then extracted based on fits to experimental data for nonlinear and both ideal and non-ideal kinetic models.246038 bytes1072 bytesapplication/pdftext/plainenThis paper was published in Optics express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?URI=OPEX-13-18-6990. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.Volume holographic gratingsHolographic recording materialsHolographic optical elementsHolographic storage devices (Computer science)PhotopolymerizationPhotopolymersDiffraction gratingsJournal Article13186990700410.1364/OPEX.13.006990https://creativecommons.org/licenses/by-nc-sa/1.0/