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- W1983957437 abstract "In this work, the application of thermal lens spectrometry (TLS) to study thermo-optical and spectroscopic properties of optical glasses is described. The theoretical basis for quantitative measurements is discussed together with the advantages and limitations of the method as compared with conventional measurements. The technique is applied to determine the thermal diffusivities, temperature coefficient of optical path length changes, ds/dT, and the fluorescence quantum efficiencies of several glasses such as fluorides, chalcogenides, chalcohalides, soda lime and low silica calcium aluminosilicate. For some of these glasses, the effect of glass composition on thermo-optical properties was studied. For aluminosilicate glasses was observed an 8% decrease of the thermal diffusivity with the increase of Nd2O3 doping. Five kinds of fluoride glasses were studied and it was observed that fluorindate and fluoaluminate present better thermo-optical properties compared to fluorozirconate glasses: thermal diffusivity ∼20% higher and ds/dT ∼50% lower (in modulus). All fluoride glasses had negative ds/dT and all the other glasses a positive ds/dT. For fluoride glasses, the TLS measurements were performed up to the glass transition temperature (Tg). Near Tg thermal diffusivity decreases and ds/dT increases, both by one order of magnitude. The TLS was used to determine fluorescence quantum efficiency and concentration quenching in Nd3+-doped glasses (aluminosilicate and fluorozirconate). These results were compared with the Judd–Ofelt calculations." @default.
- W1983957437 created "2016-06-24" @default.
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- W1983957437 date "2000-08-01" @default.
- W1983957437 modified "2023-10-18" @default.
- W1983957437 title "Mode-mismatched thermal lens spectrometry for thermo-optical properties measurement in optical glasses: a review" @default.
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- W1983957437 doi "https://doi.org/10.1016/s0022-3093(00)00169-1" @default.
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