6 February 2009 SiO2-SnO2 glass-ceramic planar waveguides activated by rare earth ions
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Abstract
Eu3+ doped (100-x) SiO2 - x SnO2 (x = 8, 16 and 25 mol %) glass-ceramic waveguides were fabricated by sol-gel technique with dip-coating processing at 800 °C. Higher thermal treatments led to the formation and growth of SnO2 nanocrystals in the matrix, enhancing the 5D07F2 emission of Eu3+. Spectroscopic investigations reveal the evolution of a centro-symmetric local environment around the Eu3+ ion. This property of glass-ceramic waveguides can be exploited for obtaining a higher rare-earth concentration in a smaller volume. The glass-ceramic waveguides exhibited low-losses (0.8 ± 0.2 dB/cm at 632.8 nm) and thus are promising for the development of high-gain integrated optical amplifiers.
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S. N. B. Bhaktha, C. Armellini, F. Beclin, M. Bouazaoui, B. Capoen, A. Chiappini, A. Chiasera, M. Ferrari, Y. Jestin, C. Kinowski, E. Moser, D. N. Rao, G. C. Righini, S. Turrell, "SiO2-SnO2 glass-ceramic planar waveguides activated by rare earth ions", Proc. SPIE 7212, Optical Components and Materials VI, 721207 (6 February 2009); doi: 10.1117/12.808277; https://doi.org/10.1117/12.808277
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