We have investigated the optical properties of Ca3Sc2Ge3O12 doped with Tm3+ and Ho3+, a new potential laser material for the 2 mum region. We present a room temperature characterization of both singly and co-doped crystals, including the absorption spectra in the visible and NIR regions, the NIR fluorescence spectra and the decay time measurements. In particular, attention has been focused on the H-3(4) <-- H-3(6) (Tm3+) absorption transition lying in the 800 nm region and suitable for diode laser pumping and on the Tm3+-Ho3+ energy transfer process in order to improve the efficiency of the Ho3+ emission. From the experimental data we have calculated some parameters that deeply affect the performance of a possible NIR laser, i.e. the emission cross sections in the 2 mum region and the value of the transfer coefficient between the Tm3+ and Ho3+ ions inside this crystal.

NIR luminescence and laser parameters of Ca3Sc2Ge3O12 garnet host crystals activated with Tm3+ and Ho3+ / I. Boscolo, S. Cialdi. - In: JOURNAL OF LUMINESCENCE. - ISSN 0022-2313. - 92:3(2001 Feb), pp. 237-244.

NIR luminescence and laser parameters of Ca3Sc2Ge3O12 garnet host crystals activated with Tm3+ and Ho3+

I. Boscolo
Primo
;
S. Cialdi
Ultimo
2001

Abstract

We have investigated the optical properties of Ca3Sc2Ge3O12 doped with Tm3+ and Ho3+, a new potential laser material for the 2 mum region. We present a room temperature characterization of both singly and co-doped crystals, including the absorption spectra in the visible and NIR regions, the NIR fluorescence spectra and the decay time measurements. In particular, attention has been focused on the H-3(4) <-- H-3(6) (Tm3+) absorption transition lying in the 800 nm region and suitable for diode laser pumping and on the Tm3+-Ho3+ energy transfer process in order to improve the efficiency of the Ho3+ emission. From the experimental data we have calculated some parameters that deeply affect the performance of a possible NIR laser, i.e. the emission cross sections in the 2 mum region and the value of the transfer coefficient between the Tm3+ and Ho3+ ions inside this crystal.
spectroscopy ; lasers ; rare earths ; inorganic compounds
Settore FIS/01 - Fisica Sperimentale
feb-2001
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/66466
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