Author/Authors :
Zampedri، نويسنده , , L. and Righini، نويسنده , , G.C. and Portales، نويسنده , , H. and Pelli، نويسنده , , S. and Nunzi Conti، نويسنده , , G. and Montagna، نويسنده , , M. and Mattarelli، نويسنده , , M. and Gonçalves، نويسنده , , R.R. and Ferrari، نويسنده , , Rui M. and Chiasera، نويسنده , , A. and Bouazaoui، نويسنده , , M. and Armellini، نويسنده , , C.، نويسنده ,
Abstract :
(100 − x)SiO2–xHfO2 (x = 10, 20, 30, 40 mol) planar waveguides, doped with 0.3 mol% Er3+ ions were prepared by the sol–gel route, using dip-coating deposition on v-SiO2 substrates. The waveguides were characterized by m-line, Raman and photoluminescence spectroscopies. The results are discussed with the aim of assessing the role of hafnia on the structural, optical and spectroscopic properties of the erbium-doped silica-hafnia planar waveguides. The spectral bandwidth of the 4I13/2 → 4I15/2 transition does not change practically with the hafnium content. The 4I13/2 level decay curves present a single-exponential profile, with a lifetime between 5.5 and 7.1 ms, depending on the HfO2 concentration.
