A 6.5 ns gain-switched electro-optical Q-switched Nd:YAG laser by 885 nm laser diode pulsed-end pumping

Abstract

We demonstrated a compact gain-switched electro-optical Q-switched 1064 nm Nd:YAG laser by 885 nm laser diode pulsed-end pumping at the pulse repetition frequency of 2 kHz. In free-running mode, an output power of 14.44 W was obtained under the absorbed pump power of 23.31 W, and the slope efficiency of 77.2% approached the theoretical limitation. In Q-switching mode, we obtained a maximum single pulse energy of 3 mJ with a pulse width of 6.5 ns, corresponding to a peak power of 462 kW with a beam quality factor M 2 of 1.6.

Compact and highly stable electro-optic Q-switched laser at 1064 nm based on a composite YAG/Nd:YAG crystal

“…Operating at 10 kHz, the maximum output average power reached 22.7 W, whereas at 2 kHz the pulse energy of 5.1 mJ were achieved with the pulse width of 14.5 ns using a 310-mm cavity length 23 . Xu et al 24 . used an Nd:YAG slab pumped at 885 nm to accomplish laser pulses of 3 mJ, 6.5 ns at 2 kHz with a L-shaped cavity length of 210 mm.…”

“…Operating at 10 kHz, the maximum output average power reached 22.7 W, whereas at 2 kHz the pulse energy of 5.1 mJ were achieved with the pulse width of 14.5 ns using a 310-mm cavity length. 23 Xu et al 24 used an Nd:YAG slab pumped at 885 nm to accomplish laser pulses of 3 mJ, 6.5 ns at 2 kHz with a L-shaped cavity length of 210 mm. Wei et al 18 used a gradient-doped Nd:YAG crystal to reduce the thermal effect, which achieved the average output power of 6.9 W at 2 kHz with a cavity length of 160 mm.…”