温度调谐宽波段光参量振荡器的实验研究

为了获得宽波段的可调谐相干光源,利用1064nm声光调QNd:YAG激光器为抽运源、掺氧化镁周期极化铌酸锂晶体为工作物质,对温度调谐光参量振荡器进行了实验研究。由实验数据可知,当晶体的温度从40℃升高到200℃时,获得信号光的调谐范围为1.565μm～1.670μm;当抽运源脉宽为70ns、重复频率为10kHz、平均功率为1.61W时,获得波长为1631nm信号光的输出功率为211mW。结果表明,温度调谐光参量振荡器可以作为宽波段的可调谐相干光源。

Experimental study of temperature tunable broadband ptical parametric oscillator

In order to obtain a broadband tunable coherent sottrce,based on Mg0-doped periodically-poled lithium niobate,an optical parametric oscillator(OPO)was pumped by a 1064nm acousto-optically q-witched Nd: YAG laser,which can be conveniently tuned by means of changing its temperature.When the crystal temperature was adjusted from 40℃ to 200℃,the tunable mid-infrared output wavelength shifted from 1.565μN,m to 1.670μm.When the average pump power was 1.61w with about 70ns pulse duration operating at a repetition rate of 10kHz,the maximum signal output power of the OPO was about 211mW at 1631nm.It was shown from the results that temperature tunable optical parametric oscillator was a candidate of broadband tunable coherent sources.