Conductivity and discharge guiding properties of mid-IR laser filaments

被引：0
|
作者：
D. Mongin
V. Shumakova
S. Ališauskas
E. Schubert
A. Pugžlys
J. Kasparian
J. P. Wolf
A. Baltuška
机构：
[1] University of Geneva,GAP
[2] Vienna University of Technology,Biophotonics
来源：
Applied Physics B | 2016年 / 122卷
关键词：
Optical Parametric Amplifier; Optical Parametric Chirp Pulse Amplification; Laser Filament; Chirp Pulse Amplifier; Plasma Density Measurement;
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摘要：
The electric properties of mid-IR filaments in air have been investigated in comparison with their more traditional near-IR counterparts. Although the number of ions left after the pulse is similar for both spectral regions, filaments at 3.9 µm produce lower electron densities and lower-pressure depression, which prevent them in the present conditions (25 mJ, 90 fs) to trigger or guide HV discharges (130 kV over 12 cm). We conclude that mid-IR filaments require significantly higher energy/power levels than their near-IR counterparts for applications related to lightning control and for fully taking advantage of their unique propagation properties (single, large diameter filaments over long distances).
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