天光一号预放大器中的放大自发辐射效应  

Effect of amplified spontaneous emission in Heaven-I pre-amplifier

作　　者：张春斌[1] 龙滔[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088

出　　处：《强激光与粒子束》2002年第5期651-654,共4页High Power Laser and Particle Beams

基　　金：国家 8 63 80 4主题资助项目

摘　　要：在三维放大自发辐射 (ASE)的模拟计算中 ,计入了侧壁反射效应以及KrF自发辐射的谱线形状 (高斯型、洛伦兹型及平顶型 )的影响 ,并对空间网点的影响进行了考察。经过综合分析 ,给出了ASE对预放大器放大特性影响的上、下限范围。当计入平顶型频谱分布 ,壁反射系数为 0 .2时 ,与不计入ASE的情形对比 ,天光一号预放大器的提取效率下降为 35 %。In the numerical simulation of 3 D amplified spontaneous emission(ASE), we have investigated the effects of side reflection of ASE and the spectrum line shapes (Gaussian, Lorentzion and Square hat forms) of KrF spontaneous emission, including the influence of space grids in calculation. The ranges that ASE can affect the amplification quality of the Heaven 1 pre amplifier are gotten. We have found that the ASE effects of square hat pulse can be twice of that of Lorentzion pulse, and the extraction efficiency will be decreased about 40%. From our calculation, we learn that the efficiency can decline to about 35% if we include the influence of ASE with square hat pulse and reflection coefficient of 0.2, in contrasting with the situation which not considering the ASE effects.

关 键 词：天光一号预放大器 KRF激光器 放大自发辐射 谱线形状 空间网点 模拟计算 

分 类 号：TN722.32[电子电信—电路与系统] TN248