A high-repetition-rate diode-pumped Q-switched Nd:LaMgAl11O19 laser operating at single wavelength or dual wavelength

Based on a Nd:LaMgAl11O19 (Nd:LMA) disordered crystal, we have experimentally demonstrated a diode-pumped high-repetition-rate Q-switched laser, which can operate at 1056, 1083 nm, or 1056 and 1083 nm, respectively, using a SF6 prism to adjust the cavity loss. For the three states, the characteristics of the Nd:LMA laser including the average output power, pulse width and frequency repetition rate have also been investigated in details. For 1056 nm, the Q-switched laser is obtained in the absorbed pump power range of 3.0–5.0 W. When the absorbed pump power is 5.0 W, the corresponding output power, pulse width and frequency repetition rate are 404 mW, 2.64 µs and 157.8 kHz, respectively. For 1083 nm, the Q-switched laser is achieved at the absorbed pump power of 6.2 W, and the corresponding output power, pulse width and frequency repetition rate are 201 mW, 3.93 µs and 101.9 kHz, respectively. For 1056 and 1083 nm, the Q-switched laser is achieved at the absorbed pump power of 6.2 W, and the corresponding output power, pulse width and frequency repetition rate are 406 mW, 2.52 µs and 101.5 kHz, respectively.