Cr^4＋：YAG被动调Q微晶片激光器重复频率稳定性研究  

Investigation on Repetition Rate Stability of Cr^(4+)∶YAG Passively Q-switched Microchip Laser

作　　者：刘少龙[1] 朱少岚[1] 赵卫[1] 刘红军[1] 王屹山[1] 高存孝 

机构地区：[1]瞬态光学与光子技术国家重点实验室中国科学院西安光学精密机械研究所

出　　处：《光子学报》2008年第9期1717-1721,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(10390161,30370420)资助

摘　　要：对连续激光二极管抽运Nd∶YVO4/Cr4+∶YAG被动调Q微晶片激光器输出激光重复频率的稳定性进行了理论和实验研究.结果表明,谐振腔内存在最佳净增益,可以使激光器工作在稳定区.通过优化腔内的净增益,耦合输出镜反射率为85%,饱和吸收体初始透射率为70%,抽运功率从1.05W到1.20W的情况下,激光器工作在稳定区.当抽运功率为1.16W时,获得了重复频率为19.48kHz,稳定性优于0.68%(RMS)的高重复频率激光输出.进一步分析了抽运功率抖动对输出激光重复频率稳定性的影响.结果表明,激光器进入稳定区之后,抽运功率的抖动是制约输出激光重复频率稳定性进一步提高的最主要因素.针对抽运功率抖动带来的影响,讨论了增益预抽运技术,并比较了其优缺点.Repetition rate stability of CW LD-pumped Nd ： YVO4/Cr^4＋ ： YAG passively Q-switched microchip laser is investigated theoretically and experimentally. The results show that there is an optimal net gain in the cavity, which can make the laser work in the stable area, By optimizing the net gain in the cavity,the laser carl work in stable area with coupled output mirror reflectivity of 85%, small-signal transmission of saturable absorber of 70% ,and pump power from 1.05 W to 1, 20 W. As the pump power is 1.16 W,high repetition rate output laser with repetition rate of 19.48 kHz and RMS jitter less than 0.68% is obtained. Moreover,the effects of the jitter of pump power on the repetition rate stability are studied. It is shown that jitter of pump power is the dominant factor after working in stable area. The pre-pumping technology is introduced and discussed, for reducing jitter of repetition rate from jitter of pump power.

关 键 词：被动调Q 稳定性 净增益 CR^4+:YAG 

分 类 号：TN248.1[电子电信—物理电子学]