期刊
OPTICS LETTERS
卷 40, 期 6, 页码 1069-1072出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.40.001069
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- AFOSR [FA9550-12-1-0499, FA9550-14-1-0255]
- Center for Free-Electron Laser Science, DESY, Hamburg, Germany
- Deutsche Forschungsgemeinschaft
- Singapore Institute of Manufacturing Technology [SIMT/14-110023]
- Agency for Science, Technology and Research (A*STAR) in Singapore
- SUNY Research Foundation
- European Regional Development Fund
- European Social Fund
- state budget of the Czech Republic [CZ.1.05/2.1.00/01.0027, CZ.1.07/2.3.00/20.0143, CZ.1.07/2.3.00/30.0057]
- Ministry of Science and Technology in Taiwan for their support via the Postdoctoral Research Abroad Program [NSC 102-2917-I-564-026]
We experimentally and numerically investigate the spectral and temporal structure of mid-infrared (mid-IR) filaments in bulk dielectrics with normal and anomalous group velocity dispersion (GVD) pumped by a 2.1 mu m optical parametric chirped-pulse amplifier (OPCPA). The formation of stable and robust filaments with several microjoules of pulse energy is observed. We demonstrate a supercontinuum that spans more than three octaves from ZnS in the normal GVD regime and self-compression of the mid-IR pulse to sub-two-cycle duration in CaF2 in the anomalous GVD regime. The experimental observations quantitatively agree well with the numerical simulations based on a three-dimensional nonlinear wave equation that reveals the detailed spatio-temporal dynamics of mid-IR filaments in dielectrics. (C) 2015 Optical Society of America
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