[5] Spiekermann S, Karisson H, Laurrell F. Efficient frequency conversion of a passively Q-switched Nd:YAG laser at 946 nm in periodically poled KTiOPO4. Appl. Opt., 2001, 40(12):1979~1982
[6] Wang C W, Weng Y L, Huang P L et al.. Passively Q-switched quasi-three-level laser and its intracavity frequency doubling. Appl. Opt., 2002, 41(6):1075~1081
[7] Risk W P. Modeling of longitudinally pumped solid-state lasers exhibiting reabsorption losses. J. Opt. Soc. Am. (B), 1988, 5(7):1412~1423
[8] Barnes N P, Walsh B M, Hutcheson R L et al.. Pulsed 4I3/2 to 4I92 operation of Nd lasers. J. Opt. Soc. Am. (B), 1999, 16(12):2169~2177