Up-conversion emission tuning in triply-doped Yb3+/Tm3+/Er3+ novel fluoro-phosphate glass and glass-ceramics

Yannick Ledemi; Andrée-Anne Trudel; Victor A. G. Rivera; Younes Messaddeq

doi:10.1117/12.2040704

7 March 2014 Up-conversion emission tuning in triply-doped Yb³⁺/Tm³⁺/Er³⁺ novel fluoro-phosphate glass and glass-ceramics

Yannick Ledemi, Andrée-Anne Trudel, Victor A. G. Rivera, Younes Messaddeq

Author Affiliations +

Proceedings Volume 8982, Optical Components and Materials XI; 89820V (2014) https://doi.org/10.1117/12.2040704
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

New Yb³⁺, Er³⁺ and Tm³⁺ triply doped fluoro-phosphate glasses belonging to the system NaPO₃-YF₃-BaF₂-CaF₂ have been prepared by the classical melt-casting technique. Glasses containing up to 10 wt.% of rare-earth ions fluorides have been obtained and characterized by using differential scanning calorimetry (DSC), UV-visible-near-infrared spectroscopy and up-conversion emission spectroscopy under excitation with a 975 nm laser diode. Transparent and optically homogeneous glass-ceramics have been reproducibly obtained by appropriate heat treatment in view to manage the red, green and blue emissions upon 975 nm laser excitation. According to the applied thermal heat-treatment, a large enhancement of intensity of the up-conversion emission – from 10 to 160 times higher – has been achieved in the glassceramics compared to that of glasses, suggesting incorporation of the rare-earth ions into the crystalline phase. Furthermore, a large range of color rendering has been observed in these materials by controlling the laser excitation power and material crystallization rate. Time-resolved luminescence experiments as well as X-ray diffractometry and scanning electron microscopy techniques have been employed in order to understand and correlate the multicolor emission changes to the crystallization behavior of this material. A progressive phase transformation of the fluorite-type CaF₂-based nanocrystals initially generated was observed along with increasing heat-treatment time, thus modifying the rare earth ions spectroscopic features.

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Yannick Ledemi, Andrée-Anne Trudel, Victor A. G. Rivera, and Younes Messaddeq "Up-conversion emission tuning in triply-doped Yb³⁺/Tm³⁺/Er³⁺ novel fluoro-phosphate glass and glass-ceramics", Proc. SPIE 8982, Optical Components and Materials XI, 89820V (7 March 2014); https://doi.org/10.1117/12.2040704

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