摘要
根据Siegman的被动调Q判据 ,Nd∶YVO4晶体由于受激发射截面大、上能级寿命短 ,很难获得被动调Q输出。利用LD光纤耦合端面泵浦Nd∶YVO4晶体 ,在泵浦功率 3.5W时 ,连续运转获得最大输出 1 .4W ,相应的光光转换效率为 40 % ,同时采用Cr4+ ∶YAG可饱和吸收体 ,成功地实现了Nd∶YVO4被动调Q运转 ,获得了脉宽1 1 .7ns ,重复频率 2 2kHz调Q输出。
On the basis of Siegman′s criterion for good passive Q-switched,it is difficult to operate a diode-pumped,passive Q-switched Nd∶YVO 4 laser with Cr 4+∶YAG as the saturable absorber.The main difficulties arise from the fact that a Nd∶YVO 4 crystal has a high stimulated emission cross section.With a fiber coupled laser diode end pumping Nd∶YVO 4 laser,1.4W of CW output power has obtained under a pump level of 3.5W with optical conversion efficiency of 40%.The Q-switching operation of Nd∶YVO 4 laser with Cr 4+∶YAG as the saturable absorber was demonstrated.Q-switched pulses duration is 11.7ns with pulse repetition rate of 22kHz.
出处
《激光技术》
CAS
CSCD
北大核心
2002年第6期403-404,406,共3页
Laser Technology
