高功率激光片状放大器中自发辐射放大研究

贺少勃; 於海武; 郑万国; 贾伟; 陈远斌; 刘勇; 王成程; 杨东

强激光与粒子束, 2004, 16 (5): 603, 网络出版: 2006-05-15

高功率激光片状放大器中自发辐射放大研究

Research of amplified spontaneous emission in high power slab laser amplifier

论文大纲

贺少勃於海武郑万国贾伟陈远斌刘勇王成程杨东

作者单位

中国工程物理研究院,激光聚变研究中心,四川,绵阳,621900

钕玻璃片状放大器自发辐射放大储能密度 Nd:glass Slab amplifiers Amplified spontaneous emission Stored energy density

摘要

采用理论模拟和实验研究相结合的方法,研究了高功率激光片状放大器中的自发辐射放大(ASE)效应.建立了一套较完整的包含空间和时间的3维ASE模型,分析了不同电压、不同储能分布和不同泵浦时刻、不同增益长度积条件下ASE效应对放大器储能效率和小信号增益系数的影响.对4×2×3组合式放大器的计算结果表明:随着泵浦电压升高,ASE效应明显加强;23kV泵浦电压下,ASE效应造成的平均储能下降21.0%,小信号增益系数损耗为16.62%,增益不均匀性为7.44%;增益长度积可以作为判断ASE效应的依据,其值越大,ASE效应越强.

Abstract

The amplified spontaneous emission(ASE) effects in high power laser slab amplifier are investigated by theoretic simulations. A time-related 3D ASE model is developed with which the ASE effect in large aperture Nd:glass amplifier is investigated in detail. The effects of ASE to the stored energy efficiency and to small signal gain coefficient are got under different pump voltage, pump time, stored energy distribution and different gain-length product. The simulation results in the 4×2×3 amplifier indicate that the effect of ASE is stronger with the improved charge voltage, the loss of average stored energy is 21.0% by ASE, the loss of small signal gain coefficient is 16.62%,the uniformity of small signal gain coefficient is 7.44% over the aperture while pumping voltage is 23kV. The gain-length product can be used as the basis to judge the ASE effect, gain-length product is bigger, the effect of ASE is stronger.

参考文献

[1] Trenholme J B.Fluorescence amplification and parasitic oscillation limitation in disc amplifier[R].Naval Research Laboratory,NRL Memorandum Report,1972.1-26.

[2] 张华,范滇元.钕玻璃片状激光放大器自发辐射放大特性的研究[J].物理学报,2000,49(6):1047-1051.
Zhang H,Fang D Y.Investigation of the amplified spontaneous emission in Nd:glass disk laser amplifier.Acta Physica Sinica,2000,49(6):1047-1051.

[3] 冯国英,吕百达.多段阵列式钕玻璃放大器中放大自发辐射问题的研究[J].中国激光,1997,24(6):489-494.
Feng G Y,Lü B D.Amplified spontaneous emission in multisegment amplifier.Chinese Journal of Lasers,1997,24(6):489-494.

[4] Koechner W.Solid-state laser engineering[M].Heidelberg:Springer,2002.132-158.

[5] 於海武,郑万国,贺少勃,等.高功率钕玻璃固体激光放大器的物理性能优化[J].中国激光,2002,29(s0):81-85.
Yu H W,Zheng W G,He S B,et al.Physical performance optimization for high power Nd:glass solid state Lasers amplifier.Chinese Journal of Lasers,2002,29(s0):81-85.

[6] Brown D C,Benfey D F,Gehm W J,et al.Parasitic oscillations and amplified spontaneous emission in face-pumped total internal reflection lasers[A].Proc of SPIE[C].1987,736:74-83.

[7] 王成程,於海武,周海,等.新型高功率固体激光阵列式片状放大器[J].激光技术,2003,27(1):1-3.
Wang C C,Yu H W,Zhou H,et al.A new high power solid-state laser multi-segment-amplifier.Laser Technology,2003,27(1):1-3.

[8] Brown D C.Parasitic oscillations in large aperture Nd³⁺ glass amplifiers revisited[J].Appl Opt,1973,12(10):2215-2217.

贺少勃, 於海武, 郑万国, 贾伟, 陈远斌, 刘勇, 王成程, 杨东. 高功率激光片状放大器中自发辐射放大研究[J]. 强激光与粒子束, 2004, 16(5): 603. HE Shao-bo, YU Hai-wu, ZHENG Wan-guo, JIA Wei, CHEN Yuan-bin, LIU Yong, WANG Cheng-cheng, YANG Dong. Research of amplified spontaneous emission in high power slab laser amplifier[J]. High Power Laser and Particle Beams, 2004, 16(5): 603.

高功率激光片状放大器中自发辐射放大研究

关于本站 Cookie 的使用提示

全站搜索

高功率激光片状放大器中自发辐射放大研究

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索