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

Abstract

Lasers with a wavelength of 2-μm have important application prospects in those civil and military fields such as laser medical surgery, atmospheric monitoring, remote sensing, due to the strong absorption in water and its eye-safe characteristic 1 . In this research, Ho 3+ ion is a promising candidate for 2 and 2.9 μm lasers owing to the 5 I 7 → 5 I 8 and 5 I 6 → 5 I 7 transitions, respectively. 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 codoping such as Tm 3+

Ag nanoparticles enhanced 3.1 μm mid-infrared emission of Er3+/Bi+ co-doped oxyfluoride tellurite glasses

“…In recent years, mid-infrared fluorescence in a band range (2 ∼ 5 μm) is widely used in materials processing, surgery, telecommunications, spectroscopy, defense applications, and erbium-doped fiber amplifiers. 1,2 Furthermore, optical glass has always been an important aspect of midinfrared research, and it is also urgent to explore a mid-infrared glass material with excellent properties. [3][4][5] Among well-known glass matrices, silicate, borate, and phosphate glasses have high thermal stability and good mechanical properties, but their higher phonon energy hinders their applications in mid-infrared lasers.…”

“…In recent years, mid-infrared fluorescence in a band range (2∼5 μm) is widely used in materials processing, surgery, telecommunications, spectroscopy, defense applications, and erbium-doped fiber amplifiers 1 , 2 . Furthermore, optical glass has always been an important aspect of mid-infrared research, and it is also urgent to explore a mid-infrared glass material with excellent properties 3 …”