利用1.06 μm光泵浦周期极化钽酸锂(PPLT)晶体获得1.54 μm激光.采用内腔式光参量振荡结构,利用V型腔优化谐振腔参数,分析了OPO晶体内光斑大小随激光工作物质热焦距的变化以及V型腔夹角对光束质量的影响.当泵浦电功率约为100 W时,获得高重复频率10 kHz、脉冲宽度125 ns、平均功率1.9W的1.54 μm激光,电光转换效率约为1.9％.%A 1. 54 μm laser was obtained using periodically poled lithium tantalate (PPLT) crys-tal pumped by 1. 06 μm laser. Intracavity optical parametric oscillator(OPO) was adopted and parameters of resonant cavity were optimized by using V-type cavity. The change of the beam spot along with the thermal focus length of gain medium and the impact of the angle of V-type cavity on beam quality were analyzed. As the input electric power was about 100 W, the 1. 54 μm laser with the repetition rate of 10 kHz, pulsewidth of 125 ns and average power of 1. 9 W was acquired, and the electro-optical efficiency of 1. 9% was achieved.
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