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四程放大系统时间平顶脉冲的能量离散
引用本文:程晓锋,陈建国,景峰,张小民.四程放大系统时间平顶脉冲的能量离散[J].强激光与粒子束,2001,13(4):393-396.
作者姓名:程晓锋  陈建国  景峰  张小民
作者单位:1.四川大学 光电系,四川 成都 610064;2.中国工程物理研究院 高温高密度等离子体物理国家重点实验室,四川 绵阳621900
基金项目:国家 8 63惯性约束聚变领域 ( 863 -4 16-5 )
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1ns和13ns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更深的饱和状态,从而减小输出脉冲的能量离散度。

关 键 词:高功率激光器  多程放大  能量离散  时间平顶脉冲
文章编号:1001-4322(2001)04-0393-04
收稿时间:2001/4/4
修稿时间:2001年4月4日

Four-pass amplifier's energy spread for flat-in time pulses
CHENG Xiao feng ,CHEN Jian guo ,JING Feng ,ZHANG Xiao min.Four-pass amplifier''''s energy spread for flat-in time pulses[J].High Power Laser and Particle Beams,2001,13(4):393-396.
Authors:CHENG Xiao feng    CHEN Jian guo  JING Feng  ZHANG Xiao min
Institution:1.Optoelectronics Department of Sichuan University, Chengdu 610064, China;2.National Key Laborary of Laser Fusion, CAEP, P.O. Box 919-988, Mianyang 621900, China
Abstract:Based on the theory of probabili ty and statistics, the energy instability which caused by the random error from o ptical parameters of multi beam high power solid laser was calculated in this p aper. The simulation prototype has been founded on the dozens of four pass ampl ifiers. The energy spread was evaluated for the amplifiers which output 1ns and 1 3ns flat in time laser pulses. As a result, the energy spread of outputing pul ses for 1ns pulses was bigger than that for 13ns pulses at the same conditions. Because for 13ns pulses, the amplifiers have been forced to work at deep gain sa turation state; but for 1ns pulses, the amplifiers have been worked at linear am plification 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.
Keywords:energy spread  multi  pass  amplifier  flat  in  time pulses  gain saturation
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