Untersuchung selbstinduzierter wellenleitender Strukturen in Photopolymeren auf Plexiglasbasis
Final Report Abstract
In this research project, we studied the mechanisms of the interaction of the light beams and the photopolymer. We developed the method of production of thick photopolymer layers using the technologies of radical copolymerization and laminating the photopolymer layers between glasses. We achieved the thermal stability of the photopolymer up to 200ºC, whereas the thickness of the photopolymer layers was up to 5mm. Thus we could get the material to study 2D-propagation of the laser beams. Previously the available thickness of such kind of the photopolymer was below 1mm and the investigation were limited with 1D-propagation of the laser beams. We studied theoretically and experimentally the (2+1)D-propagation behaviour of laser beams (at the wavelengths of 405nm, 473nm ,and 514.5nm) and their mutual interaction with each other as well as the photopolymer material. It is shown that the self-trapping of a laser beam is generated due to the self-interaction of the propagating light wave under the conditions of a well balanced concurrence of the effects of light diffraction and nonlinear focusing. We used a new method for controlling the waveguide cross-section by changing the ratio of two competing mechanisms of the nonlinear refractive-index variation (namely the formation of the photoproducts and the heating of the medium while varying the power of the light beam). The results of the investigations were used for two applications, which are under consideration at the moment by industrial partners. The first application is the wavelength filter for telecommunication nets, the second one is the coupling elements for invisible sensors in laminated glasses.
Publications
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Broaderning of the light self-trapping due to thermal defocusing in PQ-PMMA polymeric layers, Optics Express 19, 2739 (2011)
E. Tolstik, O. Kashin, V. Matusevich, R. Kowarschik
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Modeling the photochemical kinetics induced by holographic exposures in PQ/PMMA photopolymer materials, J. Opt. Soc. Am. B 28, 2833 (2011)
Sh. Liu, M. R. Gleeson, J. Guo, J. T. Sheridan, E. Tolstik, V. Matusevich, R. Kowarschik
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New thermostable copolymers for holographic storage based on methylmethacrylate with methacrylamide or methacrylic acid, J. Polym. Res. 19, 9742 (2012)
E. Tolstik, E. Egorova, D. Hoff, V. Matusevich, L. B. Yakimtsova, Yu. I. Matusevich, R. Kowarschik, L. P. Krul
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Selftrapping waveguiding structures in nonlinear photorefractive media based on Plexiglas with phenanthrenquionene molecules, SPIE 8429, 84290W (2012)
E. Tolstik, O. Romaniov, V. Matusevich, A. Tolstik, R. Kowarschik
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A transparent optical sensor for moisture detection integrated in a PQ-PMMA medium, IEEE Photonics Technology Letters 25, 969 (2013)
V. Matusevich, F. Wolf, E. Tolstik, R. Kowarschik
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New holographic polymeric composition based on plexiglass, polyvinyl butyral, and phenanthrenquinone, Optics Communications 295, 79 (2013)
V. Matusevich, E. Tolstik, R. Kowarschik, E. Egorova, Yu. I. Matusevich, L. Krul
