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Competition between two types of anti-Stokes emission in Ho(3+)-activated ZBLAN glass
Cz Koepke1, K Wisniewski, D Piatkowski
1Institute of Physics, Nicolaus Copernicus University, Grudziądzka 5, 87-100 Toruń, Poland.
Abstract:
A competition between two anti-Stokes emissions has been observed and interpreted in ZBLAN glass activated by Ho(3+) ions. The first anti-Stokes emission intensity was seen to increase with temperature, whereas another, upconverted emission, was seen to decrease under the same conditions. Both observed tendencies are believed to be caused by the same effect: the multiphonon anti-Stokes excitation of the state responsible for the first emission. Analysis of the kinetics and fits of the theoretical model to experimental data are presented.
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