研制了一台LD侧面抽运Nd∶YAP腔内三倍频447.1 nm脉冲蓝光激光器.采用列阵高频激光二极管侧面抽运Nd∶YAP晶体，使用V型折叠腔，LN晶体电光调Q，输出高峰值功率的1 341.4 nm偏振基频光.选取KTP晶体Ⅱ类临界相位匹配倍频，获得670.7 nm红光.使用LBO晶体Ⅰ类临界相位匹配把670.7 nm的倍频光与1 341.4 nm的基频光进行和频，获得三倍频447.1 nm的蓝光输出.实验结果表明：优化后的V型折叠腔，可提高非线性转换效率，在平均抽运功率92.4 W时，获得了平均功率887 mW、峰值功率17.7 kW、脉宽50 ns的偏振蓝光输出，光-光转换效率为0.96%.

A laser-diode array side-pumped Nd∶YAP intra-cavity frequency-tripled 447 nm pulse blue laser was reported. After high peak power of polarized 1 341.4 nm fundamental laser was generated by using high frequency laser-diode array side-pump Nd∶YAP crystal, V-type resonator and LN crystal for Q-switched, 670.7 nm red laser second harmonic generation(SHG) was obtained with Ⅱcritical phase matching(CPM) KTP ctystal, and 447.1 nm blue laser by sum frequency mixing(SFM) of the 1 341.4 nm and 670.7 nm radiation was obtained withⅠCMP LBO ctystal. The experimental results show that a optimited V-type resonator can increase the efficiency of nonlinear conversion. At the incident pumping power of 92.4 W, the output power of polarized blue laser is 887 mW, the peak power of blue laser is 17.7 kW, and the pulse width is 50 ns, corresponding to an optical-to-optical conversion efficiency of 0.96%.