“…Besides, the full width at half maximum (FWHM) of absorption band at 782 nm was 11.4 nm and 15.0 nm, respectively. The FWHM is larger than the value of Tm:LYSO (8nm at 791nm [17]), Tm:YAP (3.9 nm at 777 nm [18]) and Tm:KY 3 F 10 (3.8nm at 778 nm [19]). The absorption bands of Tm:LuAG and Tm,Pr:LuAG crystals around 782 nm are wide enough to steadily absorb the incident pump power.…”