基于Nd:YAG/V:YAG键合晶体的1338 nm微片激光器研究

Research on Nd:YAG/V:YAG bonded crystal based microchip laser operating at 1338 nm

基于Nd:YAG/V:YAG键合晶体,在连续和准连续LD端面泵浦条件下,研究了输出波长1 338 nm的被动调Q微片激光器的输出特性。在连续泵浦条件下,最大的输出功率为0.73 W,此时得到稳定的调Q脉冲输出,脉冲宽度为139 ns。在准连续泵浦下,获得了被动锁模调Q激光输出,输出的最大功率为1.01 W,对应的脉冲宽度为80 ns,其中的锁模系列单脉冲宽度约为70 ps。实验结果表明,Nd:YAG/V:YAG键合晶体有利于获得高功率紧凑的1 338 nm脉冲激光输出,同时准连续泵浦能有效地降低激光晶体的热效应从而获得更高功率的激光输出。

In this paper, based on Nd：YAG/V..YAG bonded crystal, the output characteristics of an passively Q-switched microchip laser operating at 1338 nm was demonstrated under cw and quasi-cw LD end-pumping. In the cw pumping region, stable Q-switched pulse was obtained with the maximum output power of 0.73 W and a pulse width of 139 ns. Under the quasi-cw pumping region, the phenomenon of passive mode-lock Q-switched was achieved, the maximum output power was 1.01 W and the pulse width was about 80 ns. Among them there was mode-locked pulse train in the Q- switched pulse with single pulse width of 70 ps. The experiment results show that Nd ..YAG/V：YAG bonded crystal have the advantages in obtaining 1 338 nm compact pulse laser with high output power and quasi-cw pumping mode can greatly decrease the thermal effects and ensure high laser output power.