Abstract
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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42.65.Dr; 42.65.Jx; 52.35.Mw
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Chen, Y., Théberge, F., Marceau, C. et al. Observation of filamentation-induced continuous self-frequency down shift in air. Appl. Phys. B 91, 219–222 (2008). https://doi.org/10.1007/s00340-008-2985-7
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DOI: https://doi.org/10.1007/s00340-008-2985-7