期刊
APPLIED PHYSICS B-LASERS AND OPTICS
卷 91, 期 2, 页码 219-222出版社
SPRINGER
DOI: 10.1007/s00340-008-2985-7
关键词
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We observed a new filamentation nonlinear process: continuous self-frequency down shift inside the filament zone during the propagation of a femtosecond laser pulse in air. The frequency shift depends strongly on the length of the self-guided column (filament).
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