Abstract
One- and two-photon absorption coefficients in Bi2O3–B2O3 and Bi2O3–SiO2 glasses, which are characterized with zero photoelasticity and visible transparency, are studied. The two systems show a similar compositional dependence in photoelastic constant (PEC), which can be accounted for by electronic structure of Bi3+. The one-photon absorption coefficients in borate and silicate glasses depend on the existence of charge transfer phenomena, while the two-photon absorption coefficients obtained by Z-scan measurement is independent of the one-photon absorption. The interpretation by optical transition probabilities can be extended to elucidate the optical nonlinearity in ns2-type cation containing oxide glasses with zero PEC.
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