A simple method to significantly increase filaments' length and ionization density

被引：35
作者：
Daigle, J. -F. [1 ,2 ]
Kosareva, O. [3 ]
Panov, N. [3 ]
Begin, M. [1 ,2 ]
Lessard, F. [1 ,2 ]
Marceau, C. [1 ,2 ]
Kamali, Y. [1 ,2 ]
Roy, G. [4 ]
Kandidov, V. P. [3 ]
Chin, S. L. [1 ,2 ]
机构：
[1] Univ Laval, COPL, Quebec City, PQ G1V 0A6, Canada
[2] Univ Laval, Dept Phys Genie Phys & Opt, Quebec City, PQ G1V 0A6, Canada
[3] Moscow MV Lomonosov State Univ, Dept Phys, Ctr Int Laser, Moscow 119991, Russia
[4] Def Res & Dev Ctr, Sensing Air & Surface & Optron Sect, Valcartier, PQ G3J 1X5, Canada
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2009年 / 94卷 / 02期
基金：
加拿大自然科学与工程研究理事会; 加拿大创新基金会;
关键词：
FEMTOSECOND LASER-PULSES; MULTIPLE FILAMENTATION; TRANSPARENT MEDIA; AIR; POWER; LIGHT; PROPAGATION; GENERATION; INTENSITY; PHYSICS;
D O I：
10.1007/s00340-008-3270-5
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A simple method to produce longer filaments with higher ionization density in air by controlling the diameter of an aperture in the laser beam path is studied via an analysis of the backscattered N(2) fluorescence collected by LIDAR. Significant increase in the fluorescence signal (approximately by a factor of five depending on the conditions) and an increased filament length was observed at an optimum diameter. 3D + time stochastic numerical simulations have shown that the optimum aperture size corresponds to the case of multiple filament 'squeezing' around the propagation axis forming the regularized elongated structure with higher overall amount of plasma. The optimum range of aperture sizes is the same for the initial transverse perturbation scale variation at least within a factor of three.
引用
收藏
页码：249 / 257
页数：9
相关论文
共 35 条
  • [1] [Anonymous], 1984, Hand book of Chemistry and Physics, V65th, pE
  • [2] Ultrashort filaments of light in weakly ionized, optically transparent media
    Berge, L.
    Skupin, S.
    Nuter, R.
    Kasparian, J.
    Wolf, J-P
    [J]. REPORTS ON PROGRESS IN PHYSICS, 2007, 70 (10) : 1633 - 1713
  • [3] SELF-CHANNELING OF HIGH-PEAK-POWER FEMTOSECOND LASER-PULSES IN AIR
    BRAUN, A
    KORN, G
    LIU, X
    DU, D
    SQUIER, J
    MOUROU, G
    [J]. OPTICS LETTERS, 1995, 20 (01) : 73 - 75
  • [4] Moving focus in the propagation of ultrashort laser pulses in air
    Brodeur, A
    Chien, CY
    Ilkov, FA
    Chin, SL
    Kosareva, OG
    Kandidov, VP
    [J]. OPTICS LETTERS, 1997, 22 (05) : 304 - 306
  • [5] Generation of 5 fs, 0.7 mJ pulses at 1 kHz through cascade filamentation
    Chen, Xiaowei
    Li, Xiaofang
    Liu, Jun
    Wei, Pengfei
    Ge, Xiaochun
    Li, Ruxin
    Xu, Zhizhan
    [J]. OPTICS LETTERS, 2007, 32 (16) : 2402 - 2404
  • [6] Evolution and termination of a femtosecond laser filament in air
    Chen, Yanping
    Theberge, Francis
    Kosareva, Olga
    Panov, Nikolay
    Kandidov, Valerii P.
    Chin, See Leang
    [J]. OPTICS LETTERS, 2007, 32 (24) : 3477 - 3479
  • [7] The propagation of powerful femtosecond laser pulses in optical media:: physics, applications, and new challenges
    Chin, SL
    Hosseini, SA
    Liu, W
    Luo, Q
    Théberge, F
    Aközbek, N
    Becker, A
    Kandidov, VP
    Kosareva, OG
    Schroeder, H
    [J]. CANADIAN JOURNAL OF PHYSICS, 2005, 83 (09) : 863 - 905
  • [8] Femtosecond filamentation in transparent media
    Couairon, A.
    Mysyrowicz, A.
    [J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2007, 441 (2-4): : 47 - 189
  • [9] Conical forward THz emission from femtosecond-laser-beam filamentation in air
    D'Amico, C.
    Houard, A.
    Franco, M.
    Prade, B.
    Mysyrowicz, A.
    Couairon, A.
    Tikhonchuk, V. T.
    [J]. PHYSICAL REVIEW LETTERS, 2007, 98 (23)
  • [10] Generation of powerful filaments at a long distance using adaptive optics
    Daigle, J. -F.
    Kamali, Yousef
    Bernhardt, Jens
    Liu, Weiwei
    Marceau, Claude
    Azarm, A.
    Chin, S. L.
    [J]. OPTICS COMMUNICATIONS, 2008, 281 (12) : 3327 - 3335
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