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采用电光调Q脉冲Nd∶YAG固体激光器的532 nm绿光作为抽运光源(10～13 ns,0～20 mJ),以Ⅱ类相位匹配(θ=57.5°,Ф=0°)、尺寸为4 mm×4 mm×12 mm的三硼酸鉍晶体(BiB3O6)与一对1215 nm单谐振波长的平镜组成腔长为40 mm的谐振腔,构建了光参变振荡器的整个实验系统。系统将入射抽运光振荡产生1215 nm的信号光及946 nm的闲频光,结果显示,抽运阈值为9 mJ,最高耦合输出为2.57 mJ,抽运脉冲能量与信号脉冲能量的最高转换效率为14.59%。
532 nm green light of electro-optical Q-switched Nd:YAG solid-state lasers was used as pumping light source (10-13 ns, 0-20 mJ) with phase Ⅱ matching (θ = 57.5 °, φ = 0 °) A 4 mm × 4 mm × 12 mm bismuth triborate crystal (BiB3O6) and a pair of flat mirrors with a single wavelength of 1215 nm were used to form a cavity with a cavity length of 40 mm. The entire experimental system of the optical parametric oscillator was constructed. The system generates a signal light of 1215 nm and an idler light of 946 nm by oscillating the incident pump light. The result shows that the pumping threshold is 9 mJ and the maximum coupling output is 2.57 mJ. The maximum conversion efficiency of the pump pulse energy and signal pulse energy 14.59%.