对宽调谐周期极化掺镁铌酸锂光参变振荡器(OPO)进行了实验研究，OPO的抽运源采用的是激光二极管端面抽运的声光调Q NdYVO4激光器，其谐振腔由两个凹面镜构成了简单的线性腔，凹面镜的衬底材料选用氟化钙。通过改变周期极化掺镁铌酸锂晶体的温度(30~80 ℃)和极化周期(29.0~31.5 μm)，OPO实现了信号光波长在1450~1700 nm和闲频光波长在2849.0~3989.4 nm范围内的宽调谐输出。对OPO输出的光谱进行了测量，信号光光谱的半峰全宽均小于0.58 nm，闲频光光谱的半峰全宽小于4 nm。实验结果表明，实测的信号光与闲频光的波长调谐曲线与理论模拟结果非常吻合。

A experimental study of widely tunable periodically poled MgOLiNbO3 (PPMgLN) optical parametric oscillator (OPO) is presented. The laser diode (LD) end-pumped acousto-optically (A-O) Q-switched NdYVO4 laser was used as the pump source of OPO. The OPO resonator consisted of a two CaF2 concave mirror linear cavity. By varying temperature (30~80 ℃) and poling periods (29.0~31.5 μm) of PPMgLN crystal, the signal wavelength was tunable in the range of 1450~1700 nm as well as the idle wavelength was tuned from 2849.0~3989.4 nm. The measured full width at half maximum ( FWHM) of the output signal and idler ware were about 0.58 and 4 nm or less, respectively. The results indicate that the experimental data agrees well with the calculated tuning curve.