
Growth and spectral properties of Yb3+/Ho3+ co-doped NaGd(MoO4)2 crystal
A Yb3+/Ho3+ co-doped NaGd(MoO4)2 crystal was successfully grown by the Czochralski method. The crystal structure and lattice parameters were determined by the powder X-ray diffraction method. The absorption and fluorescence spectra of the
crystal were investigated at room temperature. The refractive index of NaGd(MoO4)2 crystal was calculated according to the infrared-corrected Sellmeier equation. Based on the Judd-Ofelt theory, the intensity parameters Ω
t
(t = 2, 4, 6) of
Ho3+ were derived. The spontaneous transition probabilities, the fluorescent branching ratios and the radiative lifetimes of the main multiplets of Ho3+ ion were calculated as well. The stimulated emission cross section for the transition from 5
I
7
to 5
I
8 of Ho3+ was calculated to be 1.2320 × 10–20 cm–2 by the Füchtbauer-Ladenburg equation with the full width at half maximum of 117.8 nm.
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Keywords: CZOCHRALSKI METHOD; LASER MATERIAL; MOLYBDATE; SINGLE CRYSTAL GROWTH; SPECTRAL PROPERTIES
Document Type: Research Article
Publication date: December 1, 2015
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