Comparison of Tm-sensitized Ho:Yag and Ho:YLF crystals for a laser-pumped 2 μm CW oscillator

High efficient actively Q-switched Ho:LuAG laser

“…And the slight molar mass difference of 5.8% between Ho and Lu (46.7% between Y and Ho) makes a weak decrease in thermal conductivity of LuAG with holmium doping [13]. It's for these reasons that the Tm-sensitized Ho doped LuAG (LuLF) lasers have much higher 2 µm laser efficiency compared to YAG (YLF) [14,15]. Moreover, previous works demonstrated that the substitution of Lu 3+ ions for Y 3+ ions in several structures provides Lu compounds with preferable conditions for trivalent lanthanide lasant doping [16][17][18][19].…”

High-power gain-switched Ho:LuAG rod laser

“…In experiment, Tm, Ho-doped LuAG laser has achieved higher laser efficiency at 2 μm than the YAG or YLF laser [4][5][6][7]. When Ho:LuAG crystal is pumped with the 1.9-μm Tm:YLF laser, the laser wavelength is near 2.1 μm, providing a quantum defect less than 10%.…”

“…Compared with the crystal YAG, the garnet isostructure Lutetium Aluminum Garnet (Lu 3 Al 5 O 12 , LuAG) has a higher crystal field [3], leading to large manifold splitting and low thermal occupation for the lower laser level. In experiment, Tm, Ho-doped LuAG laser has achieved higher laser efficiency at 2 µm than the YAG or YLF laser [4][5][6][7]. When Ho:LuAG crystal is pumped with the 1.9-µm Tm:YLF laser, the laser wavelength is near 2.1 µm, providing a quantum defect less than 10%.…”

Fabrication and Spectroscopic Properties of (Ho_0.01La_0.10Y_0.89)₂O₃ Transparent Ceramics

“…Yb,Ho:YAG and Tm,Ho:YAG single crystal using for the generation of 2 µm laser have been widely studied [9,10]. Laser operation has been successfully realized in Ho:YAG and Ho:Y 2 O 3 transparent ceramic [11,12].…”