6-ns level passively Q-switched Nd:KNaY (WO4)2 laser at 1.07 µm

• Diode pumped Nd: KNaY (WO 4 ) 2 crystal has been used for the first time to obtain laser output operating at 1.07 µm. • A stable passively Q-switched Nd: KNaY (WO 4 ) 2 laser with pulse width of 6 ns had been successfully achieved. • The effect of Cr 4+ : YAG initial transmission on the output pulse of passively Q-switched was studied by simulation. To our knowledge, a compact diode-pumped Nd: KNaY (WO 4 ) 2 laser operating at 1.07 µm has been successfully achieved for the first time. The passively Q-switched Nd: KNaY (WO 4 ) 2 pulse laser with the narrowest pulse width of 6.23 ns and peak power of 1.34 kW was obtained by experiment, and its laser characteristics were studied in detail. The effect of Cr 4+ : YAG initial transmission for pulse width of Nd: KNaY (WO 4 ) 2 output laser was investigated by theoretical analysis and numerical simulation. Finally, it was found that the theoretical and experimental results are basically in agreement.