用准连续60 W的二极管激光列阵侧面泵浦“之”字形Nd:YAG板条激光器，当泵浦功率为45 W，脉宽为400 μs时，得到3.5 mJ的激光输出。用KD*P电光开关调Q，得到18 ns(FWHM)、2 mJ的脉冲激光输出，用KTP晶体作腔内倍频，得到15 ns、0.85 mJ的二次谐波激光输出。在腔内无调Q元件且腔长小于5 cm时，于近阈值处得到单频绿光输出，而当泵浦功率稍大，腔内有数个纵模振荡时，观察到激光的反相态，并用数值模拟的结果对此作了解释。

A Nd:YAG laser was side pumped with laSer-diode-array of 45 W Q-cw(400 μs) output. This laser provides 3.5 mJ output at 1064 nm for free runing oscillation, and 0.85 mJ at 532 urn for Q-switched operation with pulse. width of 15 ns. Removing the Q-switch away, and shortening the cavity optical length to less than 5 cm, a single longitudinal mode of 532 nm laser was observed near threshold. Increasing the pumpPower somewhat, we have observed the antiphase laser output.