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Proceedings Paper

Recording of diffraction gratings in polyvinyl alcohol/acrylamide photopolymers by pulsed laser irradiation
Author(s): Celia Garcia; Angel Costela; Antonio Fimia; Inmaculada Garcia-Moreno; Inmaculada V. Pascual; Roberto Sastre
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Paper Abstract

In this communication 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.

Paper Details

Date Published: 4 June 2001
PDF: 8 pages
Proc. SPIE 4296, Practical Holography XV and Holographic Materials VII, (4 June 2001); doi: 10.1117/12.429469
Show Author Affiliations
Celia Garcia, Univ. de Alicante (Spain)
Angel Costela, Instituto de Quimica-Fisica "Rocasolano" (Spain)
Antonio Fimia, Univ. Miguel Hernandez/Elche (Spain)
Inmaculada Garcia-Moreno, Instituto de Quimica-Fisica "Rocasolano" (Spain)
Inmaculada V. Pascual, Univ. de Alicante (Spain)
Roberto Sastre, Instituto de Ciencia y Tecnologia de Polimeros (Spain)

Published in SPIE Proceedings Vol. 4296:
Practical Holography XV and Holographic Materials VII
Stephen A. Benton; Sylvia H. Stevenson; T. John Trout; Sylvia H. Stevenson; T. John Trout, Editor(s)

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