摘要
针对光学元件参数存在随机误差的多光束高功率固体激光驱动器 ,利用概率与统计的方法模拟计算了 9-6排布四程放大系统输出时间宽度为 1 ns和 1 3 ns的平顶脉冲时主放大器输出的基频光的能量离散情况。计算结果表明 ,当激光脉冲工作在介质的线性放大区时 ,输出脉冲的能量离散度较大 ;而当激光脉冲工作在介质的深度饱和区时 ,输出脉冲的能量离散度较小。利用放大器的这一性质 ,可以通过增加注入能量的方法使激光器工作在深度饱和状态 ,从而减小输出脉冲的能量离散度。
Based on the theory of probability and statistics, the energy instability which caused by the random error from optical parameters of multi-beam high power solid laser was calculated. The simulation prototype has been founded on the dozens of four-pass amplifiers. The energy spread was evaluated for the amplifiers which output 1 ns and 13 ns flat-in-time laser pulses. As a result, the energy spread of output pulses for 1 ns pulses was bigger than that for 13 ns pulses at the same conditions. For 13 ns pulses, the amplifiers have been forced to work at deep gain saturation state; but for 1 ns pulses, the amplifiers have been worked at linear amplification state. Using this characteristic of amplifiers, the energy spread of multi-beam lasers could be reduced by increasing the energy of input pulses to force the amplifiers working at deep gain saturation state.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2001年第4期393-396,共4页
High Power Laser and Particle Beams
基金
国家 8 63惯性约束聚变领域 ( 863 -4 16-5 )
