Recording of diffraction gratings in polyvinyl alcohol/acrylamide photopolymers by pulsed laser irradiation

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Title: Recording of diffraction gratings in polyvinyl alcohol/acrylamide photopolymers by pulsed laser irradiation
Authors: García Llopis, Celia | Costela González, Ángel | Fimia Gil, Antonio | García-Moreno Gonzalo, Inmaculada | Pascual, Inmaculada | Sastre Muñoz, Roberto
Research Group/s: Holografía y Procesado Óptico
Center, Department or Service: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad Miguel Hernández. Departamento de Ciencia de Materiales, Óptica y Tecnología Electrónica | Instituto de Química-Física "Rocasolano" | Instituto de Ciencia y Tecnología de Polímeros
Keywords: Holography | Holographic recording materials | Photopolymers | Diffraction gratings | Pulsed laser
Knowledge Area: Óptica | Física Aplicada | Química Orgánica
Date Created: 2000
Issue Date: 4-Jun-2001
Publisher: SPIE, The International Society for Optical Engineering
Citation: GARCÍA LLOPIS, Celia, et al. "Recording of diffraction gratings in polyvinyl alcohol/acrylamide photopolymers by pulsed laser irradiation". En: Practical holography XV and holographic materials VII : 22-23 January 2001, San Jose, California. Bellingham, Wash. : SPIE, 2001. (Proceedings of SPIE; Vol. 4296). ISBN 978-0-81943-974-1, pp. 274-281
Abstract: In this paper we present the experimental results obtained when diffraction gratings are stored using pulsed exposure in polyvinyl alcohol/acrylamide photopolymer deposited in a dry film. The influence of the energy of the irradiation pulse was studied and the number of pulses needed to reach maximum diffraction efficiency was obtained. The recording was performed using a n holographic copying process. The original patten employed was a gratin of 1000 lines/mm processed according to sliver halide sensitized gelatin, with a beam ratio of 1:2 and transmittance of 75 percent. We exposed the samples by recording holograms with as collimated beam from a frequency-doubled Nd:YAG Q- switched laser. The pulse duration was approximately 8 ns and the frequency of repetition varied between 2 and 10 Hz. The pulse fluence was increased from 0.07 mJ/cm2 to 6.7 mJ/cm2. Our initial results show that it is possible to obtain diffraction gratings with a diffraction efficiency of 60 percent. The energetic sensitivities achieved are close to those obtained when working with the same material and continuous irradiation, without processing of the gratings.
Sponsor: This work was financed by the Comisión Interministerial de Ciencia y Tecnología (CICYT) of Spain (Project MAT 97-0705-C02-02 and Project MAT 99-0622).
ISBN: 978-0-81943-974-1
ISSN: 0277-786X
DOI: 10.1117/12.429469
Language: eng
Type: info:eu-repo/semantics/article
Rights: Copyright 2001 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE, Vol. 4296, 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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