标题：Watt-Level Continuous-Wave and Black Phosphorus Passive Q-Switching Operation of Ho3+,Pr3+:LiLuF4Bulk Laser at 2.95 μm
作者：Nie, Hongkun ;Zhang, Peixiong ;Zhang, Baitao ;Xu, Min ;Yang, Kejian ;Sun, Xiaoli ;Zhang, Lianhan ;Hang, Yin ;He, Jingliang
作者机构：[Nie, Hongkun ;Zhang, Baitao ;Yang, Kejian ;Sun, Xiaoli ;He, Jingliang ] State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Sh 更多
来源：IEEE Journal of Selected Topics in Quantum Electronics
摘要：Efficient continuous wave (CW) and passively Q-switched Ho3+,Pr3+:LiLuF4(Ho,Pr:LLF) laser operating at 2.95 μm were realized using a 1150-nm Raman fiber laser as the pump source. A CW output power as high as 1.15 W, which we believe to be the highest one ever achieved from Ho3+-doped bulk laser emission around 3 μm, corresponds to an optical-to-optical conversion efficiency of 14.5% and a slope efficiency of 15.5%, respectively. A high-quality saturable absorber (SA) based on multilayered black phosphorus (BP) nanosheet film deposited on a CaF2substrate was successfully fabricated and employed. Under the absorbed pump power of 7.36 W, the shortest pulse width of 194.3 ns was obtained, which is the shortest among the two-dimensional materials as SA around 3 μm. The results not only indicated that Ho,Pr:LLF crystal would be a promising mid-infrared (MIR) gain medium for obtaining high power output, but verified that the multilayered BP is a promising optical modulator for generating short pulses in MIR spectral range.
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