期刊
OPTICS LETTERS
卷 44, 期 9, 页码 2173-2176出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.44.002173
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资金
- Austrian Science Fund (FWF) [P 26658, P 27577]
- Russian Foundation for Basic Research (RFBR) [16-02-00843, 17-52-53092, 18-29-20031, 19-02-00473]
- Welch Foundation [A-1801-20180324]
- Russian Science Foundation (RSF) [17-12-01533]
- Office of Naval Research (ONR) [00014-16-1-2578]
- Austrian Science Fund (FWF) [P26658] Funding Source: Austrian Science Fund (FWF)
- Russian Science Foundation [17-12-01533] Funding Source: Russian Science Foundation
Formation of light bullets-tightly localized in space and time light packets, retaining their spatiotemporal shape during propagation-is, for the first time, experimentally observed and investigated in a new regime of mid-infrared filamentation in ambient air. It is suggested that the light bullets generated in ambient air by multi-mJ, positively chirped 3.9-mu m pulses originate from a dynamic interplay between the anomalous dispersion in the vicinity of CO2 resonance and positive chirp, both intrinsic, carried by the driver pulse, and accumulated, originating from nonlinear propagation in air. By adjusting the initial chirp of the driving pulses, one can control the spatial beam profile, energy losses, and spectral-temporal dynamics of filamenting pulses and deliver sub-3-cycle mid-IR pulses in high-quality beam on a remote target. (C) 2019 Optical Society of America
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