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Study of resonant and nonresonant nonlinear phenomena using femtosecond Cr:Forsterite laser
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Paper Abstract

Nonlinear absorption and refraction effects are of particular interest for areas like optical communication (all optical switching and limiting). Nonlinear parameters of ZnSe, GaAs and polythiophene (polythiophene/zeolite complex) have been the subject of investigation using an Cr: Forsterite fs laser source with an output wavelength of 1250 nm, i.e. in a spectral region which plays important role for optical communication systems. The obtained values of nonlinear refractive index and two photon absorption coefficient are compared to theoretically predicted values. Beside the original transmittance Z-scan technique a modified Z-scan technique, which allows the sample transmittance and fluorescence being registered simultaneously was employed. The results are compared with a previously introduced theoretical model15,16. We demonstrated, that the recently developed low bandgap conductive polymer polythiophene shows nonlinear absorption followed by the luminescence in the visible. In addition, there is a different behavior of nonlinear absorption and luminescence for polyalkylthiophene and polythiophene/zeolite complex which may be explained by the supramolecular complexation of polythiophene in zeolite.

Paper Details

Date Published: 6 December 2006
PDF: 9 pages
Proc. SPIE 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 594516 (6 December 2006); doi: 10.1117/12.638952
Show Author Affiliations
D. Lorenc, Comenius Univ. (Slovak Republic)
I. Bugar, International Laser Ctr. (Slovak Republic)
F. Uherek, International Laser Ctr. (Slovak Republic)
Slovak Univ. of Technology (Slovak Republic)

Published in SPIE Proceedings Vol. 5945:
14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics
Anton Štrba; Dagmar Senderákova; Miroslav Hrabovský, Editor(s)

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