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Structures and Third‐Order Optical Nonlinearities of BiO 1.5 –WO 3 –TeO 2 Glasses
Author(s) -
Fujiwara Takeshi,
Hayakawa Tomokatsu,
Nogami Masayuki,
Thomas Philippe
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.04291.x
Subject(s) - bismuth , tungsten , materials science , raman spectroscopy , mineralogy , raman scattering , optics , chemistry , metallurgy , physics
We investigated third‐order optical nonlinearities (χ (3) ) by femto‐second Z‐scan technique for various compositions of bismuth–tungsten–tellurite glasses ( x BiO 1.5 –20WO 3 –(80– x )TeO 2 ; x =0–15) as well as their Raman scattering spectra. It was revealed that a small additive of BiO 1.5 (5 mol%) in WO 3 –TeO 2 glass was capable of improving a real part of χ (3) . However, an excess amount of BiO 1.5 decreased the nonlinearity, resulting from TeO 4 –to–TeO 3+1 transformation with an increase in BiO 1.5 . We shall attempt to explain the improvement on a basis of a two‐phases model for WO 3 –TeO 2 glasses.