X-shaped third harmonic generated by ultrashort infrared pulse filamentation in air

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Title X-shaped third harmonic generated by ultrashort infrared pulse filamentation in air
Author Xu, Han; Xiong, Hui; Li, Ruxin; Cheng, Ya; Xu, Zhizhan
Journal Name Applied Physics Letters
Year Published 2008
Place of publication United States
Publisher American Institute of Physics
Abstract The authors report the measurement of the angularly resolved spectrum of the third harmonic generated in a femtosecond filament in air and its evolution with increasing pump power. Pumped by a focused infrared ultrashort pulse with a carrier wavelength of 1270 nm, a pulse duration of ∼ 20 fs, and pulse energy up to 487 μJ, the generated third harmonic is composed of an on-axis emission and a conical ring emission. When the pump power is sufficiently high, angularly resolved spectra with significant X-like feature could be observed, indicating the formation of nonlinear X wave at third harmonic.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1063/1.2830017
Volume 92
Issue Number 1
Page from 011111-1
Page to 011111-3
ISSN 0003-6951
Date Accessioned 2011-11-26; 2012-02-13T05:05:41Z
Research Centre Centre for Quantum Dynamics
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Nonlinear Optics and Spectroscopy
URI http://hdl.handle.net/10072/42467
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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