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

D. Lorenc; I. Bugar; F. Uherek

doi:10.1117/12.638952

6 December 2006 Study of resonant and nonresonant nonlinear phenomena using femtosecond Cr:Forsterite laser

D. Lorenc, I. Bugar, F. Uherek

Proceedings Volume 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 594516 (2006) https://doi.org/10.1117/12.638952
Event: 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2005, Nitra, Slovakia

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 model^15,16. 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.

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D. Lorenc, I. Bugar, and F. Uherek "Study of resonant and nonresonant nonlinear phenomena using femtosecond Cr:Forsterite laser", Proc. SPIE 5945, 14th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 594516 (6 December 2006); https://doi.org/10.1117/12.638952

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KEYWORDS

Absorption

Luminescence

Refractive index

Nonlinear optics

Polymers

Refraction

Transmittance

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