Generation of extended filaments of femtosecond pulses in air by use of a single-step phase plate
Author(s)
Fu, Yuxi
Xiong, Hui
Xu, Han
Yao, Jinping
Zeng, Bin
Chu, Wei
Cheng, Ya
Xu, Zhizhan
Liu, Weiwei
Chin, See Leang
Griffith University Author(s)
Year published
2009
Metadata
Show full item recordAbstract
We experimentally demonstrate that by use of a phase plate that is placed between an adjustable aperture and a focusing lens, the length of the filament can be dramatically extended in air with a femtosecond laser pulse. In addition, the far-field beam profile captured after the filament indicates that the supercontinuum is strongly confined on axis, and a single filament appears to be attainable at relatively high input pulse power when the phase plate is used.We experimentally demonstrate that by use of a phase plate that is placed between an adjustable aperture and a focusing lens, the length of the filament can be dramatically extended in air with a femtosecond laser pulse. In addition, the far-field beam profile captured after the filament indicates that the supercontinuum is strongly confined on axis, and a single filament appears to be attainable at relatively high input pulse power when the phase plate is used.
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Journal Title
Optics Letters
Volume
34
Issue
23
Subject
Nonlinear Optics and Spectroscopy
Optical Physics
Quantum Physics
Electrical and Electronic Engineering