Formation of X-waves at fundamental and harmonics by infrared femtosecond pulse filamentation in air
Author(s)
Xu, Han
Xiong, Hui
Fu, Yuxi
Yao, Jinping
Zhou, Zenghui
Cheng, Ya
Xu, Zhizhan
Chin, See Leang
Griffith University Author(s)
Year published
2008
Metadata
Show full item recordAbstract
We experimentally observe the formation of X-waves at fundamental, third harmonic, and fifth harmonic wavelengths by infrared (central wavelength at ~ 1500 nm) femtosecond laser pulse filamentation in air. By fitting the angularly resolved spectra of the fundamental and harmonic waves using X-wave relations, we confirm that all the X-waves have nearly the same group velocity, indicating that they are locked in space and time during their propagation in filament.We experimentally observe the formation of X-waves at fundamental, third harmonic, and fifth harmonic wavelengths by infrared (central wavelength at ~ 1500 nm) femtosecond laser pulse filamentation in air. By fitting the angularly resolved spectra of the fundamental and harmonic waves using X-wave relations, we confirm that all the X-waves have nearly the same group velocity, indicating that they are locked in space and time during their propagation in filament.
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Journal Title
Applied Physics Letters
Volume
93
Issue
24
Subject
Nonlinear Optics and Spectroscopy
Physical Sciences
Engineering
Technology