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Proceedings Paper

Temperature dependent measurements on a low-molecular-weight photorefractive glass
Author(s): Ralf Bausinger; Andre Leopold; Stephan J. Zilker; Dietrich Haarer; Jolita Ostrauskaite; Mukundan Thelakkat
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Paper Abstract

The erasing dynamics of holographic gratings in a low molecular weight photorefractive glass depending on the sample temperature were investigated. Changes in the overall speed of the material by three orders of magnitude over a temperature range of 13 K were observed. We identified two distinct processes below the glass transition temperature Tg, a fast one on time scales of seconds and a slower one with lifetimes around 103 s. We attribute the fast process to the electro-optic effect and the slower one to orientational diffusion processes of the glass molecules. Above Tg, the fast process vanishes, whereas the diffusional processes accelerate up to time constants in the range of seconds. This study shows, that an accurate temperature control is indispensable when measuring photorefractive dynamics, especially in the temperature range around Tg.

Paper Details

Date Published: 16 January 2002
PDF: 8 pages
Proc. SPIE 4462, Nonlinear Optical Transmission Processes and Organic Photorefractive Materials, (16 January 2002); doi: 10.1117/12.452737
Show Author Affiliations
Ralf Bausinger, Univ. Bayreuth (Germany)
Andre Leopold, Univ. Bayreuth (Germany)
Stephan J. Zilker, Univ. Bayreuth (Netherlands)
Dietrich Haarer, Univ. Bayreuth (Germany)
Jolita Ostrauskaite, Univ. Bayreuth (Germany)
Mukundan Thelakkat, Univ. Bayreuth (Germany)

Published in SPIE Proceedings Vol. 4462:
Nonlinear Optical Transmission Processes and Organic Photorefractive Materials
Christopher M. Lawson; Klaus Meerholz, Editor(s)

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