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Influence of modifiers on thermal and optical properties of TeO2–P2O5–ZnO–PbF2 glasses

Reben Manuela, Burtan-Gwizdała Bożena, Cisowski Jan, Grelowska Iwona, El Sayed Yousef, Bukalska Julita

Optica Applicata

2019

Vol. 49, nr 3

403--413

A series of fluorotellurite glasses based on 70TeO2–5MxOy–10P2O5–10ZnO–5PbF2 in mol%, where MxOy = (WO3, Nb2O5) doped with 2400 ppm of Er2O3 have been prepared by the conventional melt quenching method. The influence of modifiers on thermal and optical properties of glasses has been analyzed. Thermal characteristics of glasses like the glass transition temperature Tg, the temperature for the crystallization onset Tx, the maximum crystallization temperature Tc, and the thermal stability parameter were determined by the DSC method. The ellipsometric data have provided Sellmeier-type dispersion relations of the refractive index of the investigated glasses. The optical parameters are used to calculate the molar refractivity, molar polarizability, oxide ion polarizability, molar cation polarizability, and a number of polarizable atoms per unit volume for every glass composition in order to interpret the refractive index of these glasses.

Optical properties of Nd:YbVO4 crystal

Liu F Q, Sun S Q, Gao C Y, Xu J Q

Optica Applicata

2015

Vol. 45, nr 1

63—70

Optical characteristics of a new laser crystal Nd:YbVO4 were studied. The optical parameters of a-cut and c-cut Nd:YbVO4 crystals were calculated by the Judd–Ofelt theory. The absorption crosssection of a-cut Nd:YbVO4 crystal was 5.34×10–20 cm2 at 808 nm, while it was 4.20×10–18 cm2 of c-cut Nd:YbVO4 crystal. The properties of energy transfer between Nd and Yb ions in Nd:YbVO4 crystal were discussed. In the fluorescence spectra, a peak at 472 nm appeared, which resulted from the coupling interaction between two Yb ions.

Analysis of optical transitions of Nd3+ in YAG nanocrystallites

Bednarkiewicz A.

Materials Science Poland

2004

Vol. 22, No. 3

211--217

A novel approach to the analysis of optical transitions in Nd3+-doped nanocrystallites is put forward, based on the Judd-Ofelt analysis of luminescence transitions associated with the 4F3/2›4I11/2 and 4F3/2›4I9/2 bands. The procedure, requiring neither information on Nd3+ concentration nor transparent samples, greatly simplifies calculation of branching ratios of neodymium 4F3/2 ›4IJ. The technique seems to be very useful in the spectroscopic assessment of Nd3+-doped materials for laser and optoelectronic purposes. The effect of grain size in nanometric ceramics on the branching ratio is considered.