[1]柳剑鹏,陶志鹏,陶向阳.强激光脉冲在部分离化等离子体中的自聚焦[J].江西师范大学学报(自然科学版),2014,(05):464-467.
 LIU Jian-peng,TAO Zhi-peng,TAO Xiang-yang.The Self-Focusing of a Short Laser Pulses in Partially Stripped Plasma[J].,2014,(05):464-467.
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强激光脉冲在部分离化等离子体中的自聚焦()
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《江西师范大学学报》(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2014年05期
页码:
464-467
栏目:
出版日期:
2014-10-31

文章信息/Info

Title:
The Self-Focusing of a Short Laser Pulses in Partially Stripped Plasma
作者:
柳剑鹏;陶志鹏;陶向阳
江西师范大学物理与通信电子学院,江西 南昌,330022
Author(s):
LIU Jian-peng;TAO Zhi-peng;TAO Xiang-yang
关键词:
激光传播部分离化等离子体焦斑半径脉冲宽度自相位调制
Keywords:
laser propagationpartially stripped plasmaslaser spot sizelaser pulse lengthgroup velocity dispersion
分类号:
O539
文献标志码:
A
摘要:
采用变分法推导出有限长激光脉冲在部分离化等离子体中的参数演化方程,其中包含群速度色散和自相位调制的影响,通过分析焦斑半径和脉冲宽度满足的耦合方程,详细讨论了等离子体密度对激光脉冲传播特性影响。研究结果表明:在部分离化等离子体中,对于给定强度的激光脉冲,随着等离子体密度增大,自相位调制会进一步增强激光脉冲的自聚焦;当等离子体密度增大时,激光脉冲传播频率由负向啁啾变化转变为正向啁啾频率变化,而且随着传播距离增大,激光脉冲红移减小而蓝移增大。研究结果对有限长激光脉冲电离诱导自注入加速电子的方案具有理论指导意义。
Abstract:
In the presence of self-phase modulation,and group velocity dispersion,the propagation characteristics of a short laser pulse in partially stripped plasma are investigated. A variational technique is used to obtain equations describing the evolution of the laser spot size and pulse length,analyzing the effects of the plasma density on the propagation of a short laser pulse in partially stripped plasma. It is found that the laser pulse can be allowed to prop-agate in patitally stripped plasma only when a certain relation for laser parameters and plasma parameters is satis-fied. The plasma density has affected the laser focusing enhanced efficiently. As compared to fully ionized plasma,in partially stripped plasma,plasma density play a critical role of the laser focusing. The results may be significant the-oretically to the mechanism of ionization-induced injection and acceleration by an intense laser pulse.

参考文献/References:

[1] Malka V,Fritzler S,Lefebvre E,et al.Electron acceleration by a wake field forced by an intense ultrashort laser pulse [J].Science,2002,298(5598):1596-1600.
[2] Pukhov A,Meyer ter Vehn J.Laser wake field acceleration:the highly non-linear broken-wave regime [J].ApplPhys B,2002,74(415):355-361.
[3] Mangles S P,Murphy C D,Najmudin Z,et al.Monoenergetic beams of relativistic electrons from intense laser-plasma interactions [J].Nature,2004,431(7008):535-542.
[4] Geddes C G,Toth C S,Van Tilborg J,et al.High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding [J].Nature,2004,431(7008):538-578.
[5] Tabak M,Hammer J,Glinsky M E,et al.Ignition and high gain with ultrapowerful lasers [J].Phys Plasmas,1994,1(5):1626.
[6] Lindl J.Development of the indirect-drive approach to inertial confinement fusion and the target physics basis for ignition and gain [J].Phys Plasmas,1995,2(11):3933-4024.
[7] Zhang Shan,Xie Baisong,Hong Xueren,et al.Solitary waves of laser pulse in a plasma channel [J].Phys Plasmas,2011,18(3):33104.
[8] Esarey E,Sprangle P,Krall J,et al.Laser wakefield acceleration and relativistic optical guiding [J].IEEE Trans Plasma Sci,1996,24(2):252.
[9] Rundquist A,Durfee C G,Chang Zhenghu,et al.Phase-matched generation of coherent soft X rays [J].Science,1998,280(5368):1412-1415.
[10] Milchberg H M,Durfee C G,McIlrath T J.High-order frequency conversion in the plasma waveguide [J].Phys Rev Lett,1995,75(13):2494.
[11] Sprangle P,Esarey E,Hafizi B.Propagation and stability of intense laser pulses in partially stripped plasmas [J].Phys Rev E,1997,56:5894.
[12] Durfee C G,Rundquist A R,Backus S,et al.Phase matching of high-order harmonics in hollow waveguides [J].Phys Rev Lett,1999,83:2187.
[13] Ren C,Duda B J,Hemker R G,et al.Compressing and focusing a short laser pulse by a thin plasma lens [J].Phys Rev E,2001,63:26411.
[14] Gordan D F,Hafizi B,Hubbard R F,et al.Asymmetric self-phase modulation and compression of short laser pulses in plasma channels[J].Phys Rev Lett,2003,90:215001.
[15]Shorokhov O,Pukhov A,Kostyukov I.Self-compression of laser pulses in plasm [J].Phys Rev Lett,2003,91:265002.
[16]Kosareva O G,Panov N A,Uryupina D S,et al.Optimization of a femtosecond pulse self-compression region along a filament in air[J].Appl Phys B:Lasers Opt,2008,91:35.
[17]Couairon A,Chakraborty H,Gaarde M B,et al.From single-cycle self-compressed filaments to isolated attosecond pulses in noble gases [J].Phys Rev A,2008,77:53814.
[18]Pallavi J,Vijay S,Kostyukov I.Self-focusing and compression of laser pulses in partially stripped plasma [J].Phys Plasmas,2011,18:73105.
[19] Hu Qianglin,Liu Shibing,Ma Shanjun.Nonlinear polarization of partially stripped plasmas in intense laser field [J].High Power laser and Particle Beams,2004,16(7):870.
[20]Liu Mingping,Zheng Zhi,Liu Shiqiang.Effects of relativistic and ponderomotive nonlinearities on an intense laser pulse propagation in a plasma channel [J].Commun Theor Phys,2012,58:569.
[21] 刘明萍,陶志鹏,钟西鹃,等.在激光尾场加速中电子密度和初始动量对自注入及加速的影响 [J].江西师范大学学报:自然科学版,2013,37(1):33-36.
[22] 刘明萍,陶志鹏,陶向阳,等.自注入电子束的加速及其对激光尾场的影响 [J].江西师范大学学报:自然科学版,2014,38(1):74-77.

备注/Memo

备注/Memo:
国家自然科学基金(11147005,11178002);江西省自然科学基金(20122BAB202003)
更新日期/Last Update: 1900-01-01