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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 22 — Aug. 1, 2009
  • pp: 4403–4413

Spatial-phase-modulation-based study of polyvinyl-alcohol/acrylamide photopolymers in the low spatial frequency range

Sergi Gallego, André Márquez, David Méndez, Stephan Marini, Augusto Beléndez, and Inmaculada Pascual  »View Author Affiliations


Applied Optics, Vol. 48, Issue 22, pp. 4403-4413 (2009)
http://dx.doi.org/10.1364/AO.48.004403


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Abstract

Photopolymers are appealing materials for the fabrication of diffractive optical elements (DOEs). We evaluate the possibilities of polyvinyl-alcohol/acrylamide-based photopolymers to store diffractive elements with low spatial frequencies. We record gratings with different spatial frequencies in the material and analyze the material behavior measuring the transmitted and the reflected orders as a function of exposition. We study two different compositions for the photopolymer, with and without a cross-linker. The values of diffraction efficiency achieved for both compositions make the material suitable to record DOEs with long spatial periods. Assuming a Fermi–Dirac-function-based profile, we fitted the diffracted intensities (up to the eighth order) to obtain the phase profile of the recorded gratings. This analysis shows that it is possible to achieve a phase shift larger than 2 π rad with steep edges in the periodic phase profile. In the case of the measurements in reflection, we have obtained information dealing with the surface profile, which show that it has a smooth shape with an extremely large phase-modulation depth.

© 2009 Optical Society of America

OCIS Codes
(160.4670) Materials : Optical materials
(160.5470) Materials : Polymers

ToC Category:
Materials

History
Original Manuscript: January 21, 2009
Revised Manuscript: June 22, 2009
Manuscript Accepted: July 3, 2009
Published: July 23, 2009

Citation
Sergi Gallego, André Márquez, David Méndez, Stephan Marini, Augusto Beléndez, and Inmaculada Pascual, "Spatial-phase-modulation-based study of polyvinyl-alcohol/acrylamide photopolymers in the low spatial frequency range," Appl. Opt. 48, 4403-4413 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-22-4403

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