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We report on diode-pumped Nd:LuAG crystal lasers on 4 F 3/2 → 4 I 11/2 transition around 1.1 μm in continuous-wave and passive Q-switching regimes. For continuous-wave laser operation, a dual-wavelength laser at 1117 and 1122 nm is achieved with maximum output power of 5.82 W and slope efficiency of about 42.8%, which is believed to be the highest output power of Nd:LuAG lasers at 1.1 μm. Using an etalon to tune the lasing wavelength, a single-wavelength laser at 1114 nm is also realized, for the first time to our knowledge, with maximum output power of 4.11 W. Further wavelength tuning from 1113.9 to 1122.6 nm is also obtainable. Passively Q-switched laser operation at 1122 nm is finally performed with a maximum average output power of 0.73 W, the narrowest pulse width of 21.2 ns and a maximum pulse repetition rate of 14.12 kHz, which leads to a maximum pulse peak power of 2.43 kW and a maximum pulse energy of about 51.7 μJ. [ABSTRACT FROM AUTHOR]

We report diode-pumped continuous-wave (CW) and Q-switched Nd:GYSO lasers using a compact two-mirror linear laser cavity. Single-wavelength laser emissions at 1074.11 nm with 4.1-W power and at 1058.27 nm with 1.47-W power have been obtained in CW mode. The slope efficiencies with respect to the absorbed pump powers are 48.5% and 22.9%, respectively. Wavelength tunability is also demonstrated with range of about 8 nm. Using a MoS 2 saturable absorber, maximum average output power up to 410 mW at 1074 nm can be yielded with absorbed pump power 6.41 W and the maximum pulse energy reaches 1.20 μJ with pulse repetition rate of 342.5 kHz and shortest pulse width of 810 ns. The CW laser results represent the best laser performance and the Q-switching also present the highest output power for Q-switched Nd 3+ lasers with MoS 2 as saturable absorber. [ABSTRACT FROM AUTHOR]