Highly photorefractive Eu3+ activated sol-gel SiO2-SnO2 thin film waveguides

S. Berneschi; S. N. B. Bhaktha; A. Chiappini; A. Chiasera; M. Ferrari; C. Kinowski; S. Turrell; C. Trono; M. Brenci; I. Cacciari; G. Nunzi Conti; S. Pelli; G. C. Righini

doi:10.1117/12.843210

11 February 2010 Highly photorefractive Eu³⁺ activated sol-gel SiO₂-SnO₂ thin film waveguides

S. Berneschi, S. N. B. Bhaktha, A. Chiappini, A. Chiasera, M. Ferrari, C. Kinowski, S. Turrell, C. Trono, M. Brenci, I. Cacciari, G. Nunzi Conti, S. Pelli, G. C. Righini

Author Affiliations +

Proceedings Volume 7604, Integrated Optics: Devices, Materials, and Technologies XIV; 76040Z (2010) https://doi.org/10.1117/12.843210
Event: SPIE OPTO, 2010, San Francisco, California, United States

Abstract

We report on the photorefractive properties of tin-silica slab waveguides, deposited on vitreous-SiO₂ by means of sol-gel dip-coating technique. The basic composition of these amorphous binary systems is 75 SiO₂ - 25 SnO₂ mol% with 1 mol% of Eu³⁺ ions. Europium was chosen as an optical probe of the glass structure. These guiding structures exhibit low propagation losses (around 0.5 dB/cm at 633 nm) and a high refractive index modulation, as large as - 1.5 × 10^-3 under the UV irradiation of a KrF excimer laser source at λ = 248 nm, suitable for writing waveguide gratings.

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S. Berneschi, S. N. B. Bhaktha, A. Chiappini, A. Chiasera, M. Ferrari, C. Kinowski, S. Turrell, C. Trono, M. Brenci, I. Cacciari, G. Nunzi Conti, S. Pelli, and G. C. Righini "Highly photorefractive Eu³⁺ activated sol-gel SiO₂-SnO₂ thin film waveguides", Proc. SPIE 7604, Integrated Optics: Devices, Materials, and Technologies XIV, 76040Z (11 February 2010); https://doi.org/10.1117/12.843210

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