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THIN FILMS PREPARATION AND CHARACTERIZATION OF THE Y2O3-Er2O3-Al2O3 SYSTEM FOR INTEGRATED OPTICAL AMPLIFIERS

Abstract : This work specifies the synthesis and the characterization of amorphous and crystalline powder and thin films materials belonging to the Er2O3-Y2O3-Al2O3-B2O3 system. The main objective of this work was to develop an amorphous thin film samples near to the YAl3(BO3)4 composition with yttrium partially substituted by erbium (Y1-xErxAl3(BO3)4), with the aim to applied these thin films as waveguide amplifiers in the integrated optical systems. The polymeric precursor and the sol-gel methods were applied in order to produce such thin films. To well define the best conditions to obtain amorphous and dense thin films, the powder samples of the same compositions were first characterized by thermal analysis techniques, X-ray diffraction, IR and Raman spectroscopies, high resolution electron microscopy and atomic force microscopy. From thermal analysis and structural results, it was observed that the samples prepared from the polymeric precursor and sol-gel methods exhibit glass transition temperatures, Tg, at 723 and 746 oC and cristallisation temperatures, Tc, at 814 and 830 oC, respectively. These results show that dense, free of cracks, thick and homogeneous thin films could be obtained when they were submitted at a heat treatment in temperatures between Tg and Tc. From the “m-line” spectroscopy technique and luminescence measurements we observed that the Y0.9Er0.1Al3(BO3)4 amorphous thin films can be considered as monomode waveguides showing a high luminescence intensities and a lifetime similar to others amorphous borate systems. These results show the potentiality to apply such amorphous thin films as optical planar amplifiers.
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https://tel.archives-ouvertes.fr/tel-00117576
Contributor : Lauro June Queiroz Maia <>
Submitted on : Saturday, December 2, 2006 - 9:37:28 PM
Last modification on : Friday, December 18, 2020 - 1:34:02 PM
Long-term archiving on: : Tuesday, April 6, 2010 - 8:20:02 PM

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  • HAL Id : tel-00117576, version 1

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Lauro June Queiroz Maia. THIN FILMS PREPARATION AND CHARACTERIZATION OF THE Y2O3-Er2O3-Al2O3 SYSTEM FOR INTEGRATED OPTICAL AMPLIFIERS. Atomic Physics [physics.atom-ph]. Université Joseph-Fourier - Grenoble I, 2006. Portuguese. ⟨tel-00117576⟩

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