高转换效率LD抽运Cr^(4+):YAG被动调Q内腔式SrWO_4拉曼激光器实验研究  

Highly efficient laser-diode-pumped Cr^(4+):YAG passively Qswitched intracavity SrWO_4 Raman laser

作　　者：杨丽丽[1] 贾海旭 张行愚[2] 皇甫军强 丁双红[1] 

机构地区：[1]烟台大学光电信息科学技术学院,山东烟台264005 [2]山东大学信息科学与工程学院,山东济南250100

出　　处：《光电子．激光》2015年第9期1664-1670,共7页Journal of Optoelectronics·Laser

基　　金：山东省自然科学基金(ZR2014FM021);烟台大学研究生科技创新基金(01057)资助项目

摘　　要：采用Cr4+:YAG作为饱和吸收体,实现了结构紧凑的全固态半导体泵浦被动调Q内腔式钨酸锶(SrWO4)拉曼激光器,获得了稳定的、高效率的一阶斯托克斯拉曼光,并研究了激光器运转中拉曼光的偏振特性。泵浦抽运功率为5.8 W时,获得的拉曼激光输出功率为968mW,调Q脉冲重复率为49kHz,脉宽为7ns,抽运光到一阶斯托克斯光的转换效率为16.7%,斜效率为18.6%。这是目前报道的被动调Q内腔式固体拉曼激光器所获得的最高转换效率。A compact diode-pumped passively Q-switched SrWO4 Raman laser is presented with a simple linear cavity. An efficient Cr4＋ ：YAG crystal is used as the saturable absorber. Stable and high conver- sion efficiency first-Stokes light is realized and its polarization is studied. A maximum pump output power of 968 mW is obtained at an incident pump power of 5.8 W, corresponding to an overall pump light-firs〉 order Stokes conversion efficiency of 16.7 % and a slope efficiency of 18.6 %. The Q-switched pulse with repetition rate of 49 kHz and pulse width of 7 ns is obtained. The obtained diode-to-Stokes conversion ef- ficiency is much higher than those of previously reported diode-pumped passively Q-switched intracavity Raman lasersl High efficiency will help to achieve the sum-frequency process or double-frequency process. It is very significant to improve conversion effidency of the diode-pumped passively Q-switched SrWO4 Raman laser.

关 键 词：激光 受激拉曼散射(SRS) 钨酸锶(SrWO4)晶体 Cr4+:YAG被动调Q 

分 类 号：TN248.1[电子电信—物理电子学]