[2] Chen Y F. Passive Q-switching of an intra-cavity frequency doubled diode-pumped Nd:YVO4/KTP green laser with Cr4+:YAG [J]. IEEE Photonics Technology Letter., 1997, 11(9): 1481-1483
[4] Liu J, Jia Y L, Yang J M et al. Efficient diode-pumped passively Q-switched Nd:GdVO4 lasers. Chin Phys. Lett.,2002, 12(19): 1808-1810