High quality buried waveguides in stoichiometric LiTaO3 for nonlinear frequency conversion Marangoni, M. ; Lobino, M. ; Ramponi, R. ; Cianci, E. ; Foglietti, V. Abstract Publication: Optics Express Pub Date: January 2006 DOI: 10.1364/OPEX.14.000248 Bibcode: 2006OExpr..14..248M