[13] M. Zhu, X. Ding, Y. Z. Yu, W. Lv, P. Wang, J. Q. Yao. Study on the method of expanding the Ti:sapphire laser spectrum to short wavelength by using sum-frequency mixing technology in KTP crystal. J. Tianjin Univ., 35, 58(2002).
[15] Y. Liu, Z. Qiu, Q. G. Li, X. L. Zhu, X. C. Yang, B. C. Zhu. Visible optical parametric oscillator with BBO crystal. Chin. J. Lasers, 18, 517(1991).
[16] L. Peng, G. Ren, B. Zhang, W. Huang, B. W. Cai. Study of 410–2200 nm angle-tuned BBO optical parametric oscillator. Acta Photon. Sin., 31, 249(2001).