Continuous-Wave and Actively Q-Switched Diode-Pumped Er:LuAG Ring Laser at 1650 nm

Abstract

We demonstrate a cw and actively Q-switched Er:LuAG laser resonantly dual-end-pumped by 1532 nm fibre-coupled laser diodes. A maximum cw output power of 1.9 W at 1650.3 nm is obtained at a pump power of 25.5 W, corresponding to a slope efficiency of 43.3%. In the Q-switched regime, the maximum pulse energy of 3.51 mJ is reached at a pulse repetition rate of 100 Hz, a pulse duration of 90.5 ns and a pump power of 25.5 W. At the repetition rate of 400 Hz, the output energy is 2.12 mJ, corresponding to a pulse duration of 125.4 ns.

2.32 W anti-misaligned Er:LuAG single-longitudinal-mode laser in the double corner-cube-retroreflector resonator and MOPA system

“…Therefore, the Er:LuAG has excellent application prospects in the Doppler LIDAR owing to the above advantages. So far, relatively few results have been reported on the Er:LuAG lasers, mainly focusing on continuous-wave (CW), Q-switched [12][13][14] , and SLM operation. For the SLM operation, the maximum output power was achieved in Ref.…”