Efficient 2 µm emission in Nd 3+ /Ho 3+ co-doped silicate-germanate glass pumped by common 808 nm LD

Intense emission at 2.9 μm from Yb3+/Ho3+ co‐doped TeO2–Ga2O3–ZnO tellurite glasses

“…The refractive indices were fitted by the Sellmeier dispersion equation, as shown in Figure 1B. With the increase in Yb 3+ concentration, the density increased from 5.357 to 5.636 g/cm 3 , as the inset of Figure 1B shown.…”

“…However, it can not be obtained efficiently due to the lack of absorption bands matched with commercial 808 and/or 980 nm laser diodes (LDs). Therefore, sensitized excitation with rare‐earth and/or semimetal co‐doping such as Tm 3+ /Ho 3+ , Nd 3+ /Ho 3+ , Er 3+ /Ho 3+ , Bi 3+ /Ho 3+ , and other rare‐earth co‐doped glasses have attracted much attention as important matrix materials for 2‐3 μm fiber lasers 2–5 . Moreover, Yb 3+ has a relatively larger absorption cross section at 980 nm, and there is a very effective energy‐transfer process between Yb 3+ and Ho 3+ , which perfectly solves the problem of Ho 3+ lack of absorption band matching with commercial high‐power LDs 6 .…”

“…much attention as important matrix materials for 2-3 μm fiber lasers. [2][3][4][5] Moreover, Yb 3+ has a relatively larger absorption cross section at 980 nm, and there is a very effective energytransfer process between Yb 3+ and Ho 3+ , which perfectly solves the problem of Ho 3+ lack of absorption band matching with commercial high-power LDs. 6 However, the current research on the Yb 3+ /Ho 3+ co-doped system mainly focuses on up-conversion and 2 μm emission.…”

Customized physical and structural features of phosphate-based glass-ceramics: role of Ag nanoparticles and Ho3+ impurities

“…The oxide glasses and glass-ceramics doped with lanthanides ions (LIs) are prospective for many applications such as optical fibres, waveguides, lasers amplifiers, sensors, light emitting diodes, and displays [1][2][3]. The boro-phosphate system as the host is preferred for the impurities doping due to its distinct structural properties compared to the pure borate or phosphate systems [4][5][6].…”