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Proceedings Paper

Real-time direct measurement of diffraction efficiency of reflection gratings in photopolymer recording materials
Author(s): Petr Vojtíšek; Milan Květoň
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Paper Abstract

Photopolymer recording systems have received a great deal of attention as a material for optical information storage and production of diffraction gratings. Before using these materials in such systems, it is important to characterize them and understand the processes which run during holographic recording, so that the recording itself can be optimized to obtain an efficient diffraction grating. In this contribution, we present a new method for real-time measurement of the diffraction response of reflection gratings during the recording process. Usually, the recording process in photopolymers is characterized by the real-time measurement of a transmission diffraction grating growth. This method does not allow measuring the growth of gratings with a very narrow spatial period in the reflection configuration. The new approach is based on the idea that the reflection grating is illuminated with white light at a different angle from the recording one and the diffraction efficiency is continuously measured with a spectrophotometer. Kogelnik’s coupled wave theory is used as the theoretical background in this contribution. Experimentally, the photopolymer Bayfol HX has been tested in the reflection configuration and growth curves have been measured to show a good applicability of the detection method.

Paper Details

Date Published: 7 January 2015
PDF: 8 pages
Proc. SPIE 9442, Optics and Measurement Conference 2014, 94421I (7 January 2015); doi: 10.1117/12.2086804
Show Author Affiliations
Petr Vojtíšek, Institute of Plasma Physics of the AS CR, v.v.i. (Czech Republic)
Czech Technical Univ. in Prague (Czech Republic)
Milan Květoň, Czech Technical Univ. in Prague (Czech Republic)

Published in SPIE Proceedings Vol. 9442:
Optics and Measurement Conference 2014
Jana Kovačičinová; Tomáš Vít, Editor(s)

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