Power-scalable two-wavelength pumped Er:YAP laser at 2.9 μm

Highly efficient tunable multi-wavelength laser properties of Er3+,Yb3+,Pr3+ triple-doped BaLaGa3O7 crystal at ∼2.7 μm

“…17 The concentrations of Er 3+ , Yb 3+ , and Pr 3+ in the grown Er/Yb/Pr:BLGO crystal were measured by inductively coupled plasma atomic emission spectrometry (ICP-AES, Ultima2, Jobin-Yvon). The doping concentrations of Er 3+ , Yb 3+ , and Pr 3+ were 4.37 × 10 20 ions per cm 3 , 1.24 × 10 20 ions per cm 3 and 0.42 × 10 20 ions per cm 3 , respectively. Fig.…”

“…In recent years, mid-infrared (MIR) lasers have attracted considerable attention, particularly for their great potential in surgery, military and remote chemical sensing applications. [1][2][3][4][5] Er 3+ -doped crystals are more suitable for emitting at 2.7-3.0 μm in the MIR region through the 4 I 11/2 -4 I 13/2 transition. However, a distinguishing feature of this emission is the selfterminating process, which originates from the much longer lifetime of the lower level 4 I 13/2 compared with that of the upper level 4 I 11/2 (τ lower /τ upper = 2-50).…”