Onset of nonlinear self-focusing of femtosecond laser pulses in air: Conventional vs spatiotemporal focusing

被引：7

作者：

Cheng, Ya ^{[1
]}

Xie, Hongqiang ^{[1
,2
]}

Wang, Zhaohui ^{[1
,2
]}

Li, Guihua ^{[1
]}

Zeng, Bin ^{[1
]}

He, Fei ^{[1
]}

Chu, Wei ^{[1
]}

Yao, Jinping ^{[1
]}

Qiao, Lingling ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

PHYSICAL REVIEW A | 2015年 / 92卷 / 02期

基金：

中国国家自然科学基金;

关键词：

FILAMENTATION; BREAKDOWN;

D O I：

10.1103/PhysRevA.92.023854

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report an experimental comparison of critical intensities of nonlinear self-focusing in air with conventional focusing and spatiotemporal focusing schemes. Our results show that the conventional focusing with the focal lens completely filled with the incident beam allows for a higher peak intensity near the focus against the nonlinear self-focusing than the spatiotemporal focusing scheme. This is because in the high-numerical-aperture condition, the focal spot will have a compact size, which results in a high focal intensity. Meanwhile, the Rayleigh length of the focused beam will be substantially shortened, which efficiently postpones the onset of self-focusing.

引用

页数：4

共 50 条

[1] On the self-focusing of femtosecond laser pulses in air: Comments
Lugovoi, VN
Manenkov, AA
LASER PHYSICS, 2005, 15 (09) : 1269 - 1275
[2] Self-focusing arrest of femtosecond laser pulses in air at different pressures
Arevalo, E.
PHYSICAL REVIEW E, 2006, 74 (01):
[3] Self-focusing and Filamentation of Powerful Femtosecond Laser Pulses
Kandidov, V. P.
Dormidonov, A. E.
Kosareva, O. G.
Chin, S. L.
Liu, W.
SELF-FOCUSING: PAST AND PRESENT: FUNDAMENTALS AND PROSPECTS, 2009, 114 : 371 - 398
[4] Self-focusing of a focused femtosecond laser pulse in air
Geints, Y. E.
Zemlyanov, A. A.
APPLIED PHYSICS B-LASERS AND OPTICS, 2010, 101 (04): : 735 - 742
[5] Self-focusing of a focused femtosecond laser pulse in air
Y. E. Geints
A. A. Zemlyanov
Applied Physics B, 2010, 101 : 735 - 742
[6] SELF-FOCUSING OF ULTRASHORT LASER PULSES
ABRAMOV, AA
LUGOVOI, VN
PROKHORO.AM
JETP LETTERS-USSR, 1969, 9 (12): : 419 - &
[7] Dynamics of femtosecond filamentation from saturation of self-focusing laser pulses
Couairon, A
PHYSICAL REVIEW A, 2003, 68 (01):
[8] Energy Shedding during Nonlinear Self-Focusing of Laser Pulses
Travis, C.
Oppo, G. -L.
Norris, G.
McConnell, G.
2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE AND INTERNATIONAL QUANTUM ELECTRONICS CONFERENCE (CLEO EUROPE/IQEC), 2013,
[9] Experimental investigation of spatiotemporal evolution of femtosecond laser pulses during small-scale self-focusing
Deng, Y. B.
Fu, X. Q.
Tan, C.
Yang, H.
Deng, S. G.
Xiong, C. X.
Zhang, G. F.
APPLIED PHYSICS B-LASERS AND OPTICS, 2014, 114 (03): : 449 - 454
[10] Experimental investigation of spatiotemporal evolution of femtosecond laser pulses during small-scale self-focusing
Y. B. Deng
X. Q. Fu
C. Tan
H. Yang
S. G. Deng
C. X. Xiong
G. F. Zhang
Applied Physics B, 2014, 114 : 449 - 454

← 1 2 3 4 5 →