Spectral evolution of angularly resolved third-order harmonic generation by infrared femtosecond laser-pulse filamentation in air

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Title Spectral evolution of angularly resolved third-order harmonic generation by infrared femtosecond laser-pulse filamentation in air
Author Xiong, Hui; Xu, Han; Fu, Yuxi; Cheng, Ya; Xu, Zhizhan; Chin, See Leang
Journal Name Physical Review A (Atomic, Molecular and Optical Physics)
Year Published 2008
Place of publication United States
Publisher American Physical Society
Abstract We experimentally investigate the evolution of an angularly resolved spectrum of third harmonic generated by infrared femtosecond laser pulse filamentation in air. We show that at low pump intensity, phase matching between the fundamental and third-harmonic waves dominates the nonlinear optical effect and induces a ring structure of the third-harmonic beam, whereas at high pump intensity, the dispersion properties of air begin to affect the angular spectrum, leading to the formation of a nonlinear X wave at third harmonic.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1103/PhysRevA.77.043802
Volume 77
Issue Number 4
Page from 043802-1
Page to 043802-4
ISSN 1050-2947
Date Accessioned 2011-11-26; 2012-02-16T05:27:17Z
Date Available 2012-02-16T05:27:17Z
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Nonlinear Optics and Spectroscopy
URI http://hdl.handle.net/10072/42750
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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