▎ 摘　　要

We report a continuous wave (CW) Tm:YLF laser-resonantly pumped Ho: LuAG laser in CW mode and passive Q-switched (PQS) mode with multilayer graphene as a saturable absorber. The lasing performance with different output couplers is analyzed. The best result was obtained with -150-mm radius curvature and 10% transmission output coupler. Under the CW mode, Ho: LuAG laser generated a maximum 1.3-W output power at the center wavelength of 2100.65 nm, corresponding to a slope efficiency of 34.6%. In PQS mode, the minimum pulse width observed is 784.7 ns with a center wavelength of 2100.65 nm at the pump power of 5.4 W. Meanwhile, the maximum output power is 0.37 W with a pulse repetition frequency of 47.3 kHz. The results show that the multilayer graphene can be used as a saturable absorber in a Ho3+-doped laser around a 2-mu m wavelength. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)