Multiplexing holograms in an acrylamide photopolymer

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Title: Multiplexing holograms in an acrylamide photopolymer
Authors: Fernandez-Varo, Helena | Ortuño, Manuel | Márquez, Andrés | Gallego, Sergi | Pascual, Inmaculada
Research Group/s: Holografía y Procesado Óptico
Center, Department or Service: Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal
Keywords: Holography | Holographic recording materials | Photopolymers | Multiplex holography
Knowledge Area: Óptica | Física Aplicada
Date Created: 2005
Issue Date: 20-Apr-2006
Publisher: SPIE, The International Society for Optical Engineering
Citation: FERNÁNDEZ VARÓ, Elena, et al. "Multiplexing holograms in an acrylamide photopolymer". En: Photon management II : 3-4 April, 2006, Strasbourg, France / edited by John T. Sheridan, Frank Wyrowski. Bellingham, Wash. : SPIE, 2006. (Proceedings of SPIE; Vol. 6187). ISBN 978-0-81946-243-5, pp. 618712-1/7
Abstract: A peristrophic multiplexing method is used to store various diffraction gratings at the same spot in the material. This material is formed of acrylamide photopolymers which are considered interesting materials for recording holographic memories. They have high diffraction efficiency (ratio between diffracted and incident beams), high energetic sensitivity and optical quality, and developing processes are not necessary. In this work, the photopolymer is composed of acrylamide (AA) as the polymerizable monomer, triethanolamine (TEA) as radical generator, N,N′methylene-bis-acrylamide (BMA) as crosslinker, yellowish eosin (YE) as sensitizer and a binder of polyvinyl alcohol (PVA). The layers of material obtained are approximately 1 mm thick. Using holographic recording schedules, the exposure energy each hologram should receive in order to achieve uniform diffraction efficiency is optimized. The purpose of these recording schedules is to enable full advantage to be taken of the whole dynamic range of the material and to share it between the individual holograms. The Scheduled Exposure Method (SEM) and the Incremental Exposure Method (IEM) are the two multiplexing schedules used to determine the recording times. Having determined these times, the results obtained with both methods are compared to ascertain which method enables the greatest number of holograms to be recorded with the highest, most uniform diffraction efficiencies.
Sponsor: This work was supported by the "Ministerio de Educación y Ciencia" (Spain) under projects FIS2005-05881-C02-01 and FIS2005-05881-C02-02.
ISBN: 978-0-81946-243-5
ISSN: 0277-786X
DOI: 10.1117/12.662400
Language: eng
Type: info:eu-repo/semantics/article
Rights: Copyright 2006 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE, vol. 6187, and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Peer Review: si
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Appears in Collections:INV - GHPO - Artículos de Revistas

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