中文摘要：

利用声光调QNd：YVO4激光器输出的1064nm激光抽运周期极化掺氧化镁LiNbO3（PPMgLN）晶体，实现了角度调谐的双信号光运转准相位匹配（OPM）光参量输出。PPMgLN晶体长50mm，具有周期相位反转结构，极化周期29．6μm，相位反转周期6．808mm，利用外加电场极化法制作，极化沿晶体的z向进行。在晶体外部旋转角度为0°～8°范围内，实现了双信号光波在1474．841479nm和1489．5～1495．2nm波段的快速调谐输出。对角度调谐准相位匹配进行了相应的理论分析，理论结果与实验值较为一致。

英文摘要：

Angle-tuned dual signal quasi-phase-matched （QPM） optical parametric generator （OPG） based on periodically poled MgO-doped lithium niobate （PPMgLN） pumped by an acousto-optically Q-switched Nd： YVO4 laser is reported. The PPMgLN crystal is 50 mm long and has a periodical phase reversed grating structure. The grating period is 29.6 μm and the phase reversed period is 6. 808 mm. The crystal is periodically poled along the z-axis by using the external electric poling technique. While the crystal is rotated over the range of 0°-8°, the dual signal wavelengths can be rapidly tuned from 1474.8 to 1479 nm and 1489.5 to 1495.2 nm. The theoretical analysis for angle-tuned dual signal OPG is also presented. The calculated results show good agreement with the experimental data.