Filamentation control in the temperature gradient argon gas

A novel technique of controlling the evolution of the filamentation was experimentally demonstrated in an argon gas-filled tube. The entrance of the filament was heated by a furnace and the other end was cooled with air, which resulted in the temperature gradient distribution along the tube. The exp...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2009-02, Vol.94 (2), p.265-271
Main Authors: Cao, S.-Y., Kong, W.-P., Wang, Z., Song, Z.-M., Qin, Y., Li, R.-X., Wang, Q.-Y., Zhang, Z.-G.
Format: Article
Language:English
Subjects:
Argon
Beam trapping, self-focusing and defocusing
self-phase modulation
Engineering
Entrances
Evolution
Exact sciences and technology
Filaments
Fundamental areas of phenomenology (including applications)
Lasers
Mathematical analysis
Nonlinear optics
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Optics
Temperature gradient
Tubes
Ultrafast processes
optical pulse generation and pulse compression
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Summary:A novel technique of controlling the evolution of the filamentation was experimentally demonstrated in an argon gas-filled tube. The entrance of the filament was heated by a furnace and the other end was cooled with air, which resulted in the temperature gradient distribution along the tube. The experimental results show that multiple filaments are merged into a single filament and then no filament by only increasing the temperature at the entrance of the filament. Also, the filament can appear and disappear after increasing the local temperature and input pulse energy in turn. This technique offers another degree of freedom to control the filamentation and opens a new way for multi-mJ level monocycle pulse generation through filamentation in the noble gas.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-008-3337-3