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Proceedings Paper

Impact of pre-illumination in PVK-based photorefractive polymers for holographic imaging applications
Author(s): Michael Salvador; Sebastian Köber; Malte Gather; Klaus Meerholz
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Paper Abstract

A poly(N-vinylcarbazole) (PVK) based photorefractive (PR) composite has been used as recording medium in a holographic setup designed for time gated holographic imaging (TGHI). A loss of sensitivity is observed when the performance of the material is probed with a femtosecond (fs) laser and a superluminescence diode (SLD) as short coherence light sources. It is known that the reduction in sensitivity can be compensated by different chemical and physical approaches. Here we report on a first step of a comprehensive pre-illumination (PI) series experiments with red and near infrared (NIR) laser light to gain deeper insight into the microscopic mechanism of the PI effect and to overcome the loss of sensitivity. PI with red laser light increases the recording time while simultaneous PI with one of the write beams affects the response time only slightly.

Paper Details

Date Published: 1 September 2005
PDF: 6 pages
Proc. SPIE 5939, Organic Holographic Materials and Applications III, 593907 (1 September 2005); doi: 10.1117/12.626339
Show Author Affiliations
Michael Salvador, Univ. of Cologne (Germany)
Sebastian Köber, Univ. of Cologne (Germany)
Malte Gather, Univ. of Cologne (Germany)
Klaus Meerholz, Univ. of Cologne (Germany)


Published in SPIE Proceedings Vol. 5939:
Organic Holographic Materials and Applications III
Klaus Meerholz, Editor(s)

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