With tin diselenide (SnSe2) film as saturable absorber (SA), the passively Q-switched self-frequency doubling (SFD) lasers were realized in Nd3+:ReCa4O(BO3)3 (Re = Y, Gd) crystals. For Nd:YCOB crystal, the maximum average output power at 532 nm was 19.6 mW, and the corresponding pulse repetition frequency, pulse duration, single pulse energy and peak power were 17.6 kHz, 91.9 ns, 1.1 µJ, 12.1 W, respectively. For Nd:GdCOB crystal, these values were 14.5 mW, 22.1 kHz, 48.7 ns, 0.66 µJ and 13.5 W.
Sun Yuxiang, Wang Mengxia, Wang Xinle, Zhou Ying, Wang Bo, Wang Zhengping, Yu Fapeng, Xu Xinguang. Passively Q-switched self-frequency doubling Nd3+: ReCa4O(BO3)3 (Re = Y, Gd) lasers with tin diselenide as saturable absorber[J]. Chinese Optics Letters, 2019, 17(6): .