High-efficiency volume holograms recording on acrylamide and N,N'methylene-bis-acrylamide photopolymer with pulsed laser

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Title: High-efficiency volume holograms recording on acrylamide and N,N'methylene-bis-acrylamide photopolymer with pulsed laser
Authors: Gallego, Sergi | Ortuño, Manuel | García Llopis, Celia | Neipp, Cristian | Beléndez, Augusto | Pascual, Inmaculada
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 de Alicante. Departamento de Óptica, Farmacología y Anatomía
Keywords: Holography | Holographic recording materials | Volume holograms | Photopolymers | Pulsed laser
Knowledge Area: Óptica | Física Aplicada
Date Created: 2004
Issue Date: 1-Sep-2004
Publisher: SPIE, The International Society for Optical Engineering
Citation: GALLEGO RICO, Sergi, et al. "High-efficiency volume holograms recording on acrylamide and N,N'methylene-bis-acrylamide photopolymer with pulsed laser". En: Photon management : 27-28 April 2004, Strasbourg, France / Frank Wyrowski, chair-editor. Bellingham, Wash. : SPIE, 2004. (Proceedings of SPIE; Vol. 5456). ISBN 978-0-81945-383-9, pp. 383-390
Abstract: In order to achieve higher diffraction efficiencies of the volume gratings stored in acrylamide based photopolymer, we introduce in the photopolymer a crosslinker (N,N'methylene-bis-acrylamide). The presence of this component increase the rate polymerization and the modulation of refraction index. The recording was performed using a holographic copying process. The original was a grating of 1000 lines/mm processed using silver halide sensitized gelatine, with diffraction efficiency around 50 % for a reconstruction wavelength of 532 nm. The main beam was split in two secondary beams by the original grating, with an intensity ratio 1:1. The results obtained using the new composition of material are compared with the composition without crosslinker. In the other hand the no linearity of the material's response is also studied comparing the energetic sensitivity, diffraction efficiencies and index modulation of gratings recorded with pulsed and continuous laser. This study is realized fitting the angular scan of each grating using Kogelnik's theory. The gratings are recorded with wavelength of 532 nm when pulsed exposure is used and with wavelength of 514 nm when continues exposure is used. Using pulsed laser at 532 nm the photopolymer without crosslinker presents the diffraction efficiencies lightly smaller than 60%. In the other hand when the crosslinker has been introduced in photopolymer composition, the diffraction efficiencies achieves are higher than 85 %.
Sponsor: This work was supported by the "Ministerio de Ciencia y Tecnología", CICYT, Spain (project MAT2000-1361-C04-04) and by "Generalitat Valenciana", Spain (project GV01-130).
URI: http://hdl.handle.net/10045/9534
ISBN: 978-0-81945-383-9
ISSN: 0277-786X
DOI: 10.1117/12.544990
Language: eng
Type: info:eu-repo/semantics/article
Rights: Copyright 2004 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE, vol. 5456, 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
Publisher version: http://dx.doi.org/10.1117/12.544990
Appears in Collections:INV - GHPO - Artículos de Revistas

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