强激光与粒子束, 2009, 21 (1): 34, 网络出版: 2009-11-24   

光学参量啁啾脉冲放大中时间抖动对飞秒脉冲对比度的影响

Influences of synchronization time jitter in OPCPA system oncontrast ratio of femto-second pulse
作者单位
1 西华大学 理化学院,成都 610039
2 四川大学 电子信息学院,成都 610064
3 华北光电技术研究所,北京 100015
摘要
基于宽带脉冲的计算模型,采用4阶龙格-库塔法研究了光学参量放大所满足的三光波耦合方程。数值结果表明:时间不同步导致大量本底能量不能被压缩,使本底形成,导致飞秒脉冲展宽,如抖动从0变化到150 ps,则其预脉冲宽度由0.2 ps展宽到0.7 ps,降低了输出飞秒激光对比度,并导致输出能量稳定性降低。采用长而平滑泵浦光脉冲、选择适当长度的非线性晶体、并使系统工作于增益饱和区,能实现高对比度和高稳定的飞秒激光输出。
Abstract
Based on the propagation model for the wideband ultra-short pulse,the coupled equations which determine the interaction process among pump,idle and signal pulses in the LBO crystal are studied by the fourth-order Runge-Kutta methods. The simulation results are as follows: the synchronization time jitter induces the pedestal generation,which possesses plentiful energy and can not be removed in the compression stage,therefore,the pulse duration stretches and the contrast ratio of the femto-second pulses decreases seriously,for example,the prepulse stretches from 0.2 ps to 0.7 ps when the synchronization time jitter changed from 0 to 150 ps;Using the longer duration and smoother shape pump pulse can restrain the time jitter effectively,and choosing suitable length of the nonlinear crystal,the femto-second pulse with high contrast and high gain stability can be obtained when the OPCPA system is operating in the saturation region.
参考文献

[1] Monot P,Doumy G,Dobosz S,et al. High order harmonic generation by nonlinear reflection of an intense high contrast laser pulse on a plasma[J]. Opt Lett,2004,29(8):893-895.

[2] Habara H,Lancaster K,Karsch S,et al. Ion acceleration from the shock front induced by hole boring in ultraintense laser plasma interactions[J]. Phys Rev E,2004,70:046414.

[3] Mangles S P D,Walton B R,Tzoufras M,et al. Electron acceleration in cavity channels formed by a petawatt laser in low-density plasma[J]. Phys Rev Lett,2005,94:245001.

[4] 温贤伦,洪伟,谷渝秋,等.超强飞秒激光与固体靶产生的超热电子加热机制[J].强激光与粒子束,2007,19(8):1373-1376.(Wen Xianlun,Hong Wei,Gu Yuqiu,et al. Mechanism studies on hot electron generation by ultra intense femtosecond laser interacting with solid target. High Power Laser and Particle Beams,2007,19(8):1373-1376)

[5] 彭晓世,李三伟,安竹,等.激光间接驱动冲击波实验测量[J].强激光与粒子束,2007,19(5):741-745.(Peng Xiaoshi,Li Sanwei,An Zhu,et al. Experimental measurement of indirectly driven shock waves with laser. High Power Laser and Particle Beams,2007,19(5):741-745)

[6] 林晨,张立文,覃晓,等.空气中飞秒激光自聚焦等离子体通道的电导特性[J].强激光与粒子束,2007,19(5):733-736.(Lin Chen,Zhang Liwen,Qin Xiao,et al. Conductivity of self guided laser plasma channel produced by femtosecond laser pulses in air. High Power Laser and Particle Beams,2007,19(5):733-736)

[7] Kitagawa Y,Fujita H,Prepulse free petawatt laser for a fast ignitor[J]. IEEE J Quantum Electron,2004,40(3):1256 -1263.

[8] Xu Z,Yang X D,Leng Y X,et al. High power output from a compact OPCPA laser system[J]. Chin Opt Lett,2003,1(1):24-27.

[9] 马再如,冯国英,陈建国,等.泵浦光波形和脉宽对飞秒激光对比度的影响[J].强激光与粒子束,2007,19(4):572-577.(Ma Zairu,Feng Guoying,Chen Jianguo,et al. Improving contrast ratio of compressed pulses in OPCPA system by using long duration pump pulses. High Power Laser and Particle Beams,2007,19(5):572-577)

[10] 马再如,朱启华,冯国英,等.啁啾光脉冲的自相位调制效应对压缩光脉冲的影响[J].强激光与粒子束,2005,17(3):391-394.(Ma Zairu,Zhu Qihua,Feng Guoying,et al. Effects of self phase modulation of chirped pulses on compressed pulses. High Power Laser and Particle Beams,2005,17(3):391-394)

[11] 曾小明,魏晓峰,朱启华,等.光参量啁啾脉冲放大中时间同步抖动对增益稳定性的影响[J].强激光与粒子束,2006,18(4):529-532.(Zeng Xiaoming,Wei Xiaofeng,Zhu Qihua,et al. Effects of synchronization time jitter in optical parametric chirped pulse amplification on gain stability. High Power Laser and Particle Beams,2006,18(4):529-532)

[12] Ross I N,Matousek P. Analysis and optimization of optical parametric chirped pulse amplification[J]. Journal of the Optical Society of America B,2002,19(12):2945-2956.

[13] 刘红军,陈国夫,赵卫,等.三波非共线作用参变过程的相位匹配研究[J].光学学报,2002,22(2):129-133.(Liu Hongjun,Chen Guofu,Zhao Wei,et al. Study of phase matching of three wave noncollinear interactions optical parametric process. Acta Optica Sinica,2002,22(2):129-133)

马再如, 冯国英, 陈建国, 周寿桓. 光学参量啁啾脉冲放大中时间抖动对飞秒脉冲对比度的影响[J]. 强激光与粒子束, 2009, 21(1): 34. Ma Zairu, Feng Guoying, Chen Jianguo, Zhou Shouhuan. Influences of synchronization time jitter in OPCPA system oncontrast ratio of femto-second pulse[J]. High Power Laser and Particle Beams, 2009, 21(1): 34.

本文已被 2 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!