混合加宽的宽带钕玻璃激光系统的放大特性研究  

Amplification of hybrid-widen linewidth of broadband pulses in Nd:glass laser systems

作　　者：刘兰琴[1] 莫磊[1] 罗斌[2] 粟敬钦[1] 王文义[1] 王方[1] 景峰[1] 魏晓峰[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,绵阳621900 [2]西南交通大学计算机与通信工程学院,成都610031

出　　处：《物理学报》2009年第6期4307-4312,共6页Acta Physica Sinica

基　　金：国家高技术研究发展计划;中国工程物理研究院科学技术发展基金(批准号:2007B08005)资助的课题~~

摘　　要：通过宽带激光脉冲放大的物理模型,以数值模拟为工具,研究分析了激光系统对不同带宽脉冲的放大能力,以及交叉弛豫时间对脉冲放大特性的影响.计算结果表明,随着带宽的增加,激光系统的输出能力逐渐降低,在其他条件相同时,宽带分别为2,5和10nm时的输出能量比窄带输出(3000J,1ns脉宽)时分别减小了约2%,11%和27%;在带宽为几个纳米时完全非均匀加宽比完全均匀加宽的输出能量(3000J,1ns脉宽)降低了约20%;初步确定了交叉弛豫时间的范围为0—10ns.Base on physical amplification models established to describe the broadband laser pulse amplification processes, using numerical simulation methods, we analyse the amplification abilities of the Nd： glass laser system under different spectral linewidths. The results indicate that the output energies decrease with the increasing spectral linewidth. Compared with narrowband laser pulse of 3000 J/1 ns, under the same conditions, the output energies of broadband laser pulse will reduce 2 %, 11% and 27% for 2nm, 5nm and 10nm laser pulses, respectively. The influences of cross relaxation on the amplification processes are also studied. The output energies of completely nonhomogeneous broadening will reduce about 20% compared with that of completely homogeneous broadening. Then, the range of cross relaxation time is estimated to be 0-10 ns.

关 键 词：激光系统 宽带激光 放大过程 交叉弛豫 

分 类 号：TN721[电子电信—电路与系统]