Er-doped silica–hafnia films for optical waveguides and spherical resonators |
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Authors: | GC Righini S Berneschi G Nunzi Conti S Pelli E Moser R Retoux P Fron RR Gonalves G Speranza Y Jestin M Ferrari A Chiasera A Chiappini C Armellini |
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Institution: | G.C. Righini, S. Berneschi, G. Nunzi Conti, S. Pelli, E. Moser, R. Retoux, P. Féron, R.R. Gonçalves, G. Speranza, Y. Jestin, M. Ferrari, A. Chiasera, A. Chiappini,C. Armellini |
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Abstract: | In this paper we present some result on sol–gel derived silica–hafnia systems. In particular we focus on fabrication, morphological and spectroscopic assessment of Er3+-activated thin films. Two examples of silica–hafnia-derived waveguiding glass ceramics, prepared by top–down and bottom–up techniques are reported, and the main optical properties are discussed. Finally, some properties of activated microspherical resonators, having a silica core, obtained by melting the end of a telecom fiber, coated with an Er3+-doped 70SiO2–30HfO2 film, are presented. |
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Keywords: | Glass ceramics Planar waveguides Films and coatings Nanoparticles Luminescence Optical spectroscopy Infrared properties Silica Silicates Rare-earths in glasses Sol– gel aerogel and solution chemistry |
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