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Proceedings Paper

Photobleaching in side chain NLO-polymers
Author(s): Jan Vydra; Hanno Beisinghoff; Hubertus Feix; M. Eckl; Peter Strohriegl; W. Goertz; Manfred Eich
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Paper Abstract

Photobleaching experiments on thin films of azo chromophore functionalized methacrylates were carried out to investigate bleaching kinetics and its underlying mechanisms. The polymer film's spatial index variation was measured and compared with a theoretical model of bleaching dynamics. From IR-spectroscopy and from GPC measurements it was found, that bleaching causes a destruction of the chromophore and a broadening of the polymer molecular weight distribution. The generated low molecular weight fractions from both polymer and chromophore photodecay evaporate during annealing above Tg, resulting in a reduction of the film's thickness. Surface roughness increases during photobleaching, causing an increase in waveguide loss. Film surface can be smoothed completely by annealing, thus lowering the optical loss induced by bleaching.

Paper Details

Date Published: 5 October 1995
PDF: 9 pages
Proc. SPIE 2527, Nonlinear Optical Properties of Organic Materials VIII, (5 October 1995); doi: 10.1117/12.222786
Show Author Affiliations
Jan Vydra, German Telekom Research Ctr. and Technical Univ. of Darmstadt (Germany)
Hanno Beisinghoff, German Telekom Research Ctr. and Technical Univ. of Darmstadt (Germany)
Hubertus Feix, German Telekom Research Ctr. and Technical Univ. of Darmstadt (Germany)
M. Eckl, Univ. Bayreuth (Germany)
Peter Strohriegl, Univ. Bayreuth (Germany)
W. Goertz, German Telekom Research Ctr. (Germany)
Manfred Eich, German Telekom Research Ctr. and Technical Univ. of Darmstadt (Germany)


Published in SPIE Proceedings Vol. 2527:
Nonlinear Optical Properties of Organic Materials VIII
Gustaaf R. Moehlmann, Editor(s)

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