Nonlinear Propagation and Filamentation on 100 Meter Air Path of Femtosecond Beam Partitioned by Wire Mesh

Nonlinear Propagation and Filamentation on 100 Meter Air Path of Femtosecond Beam Partitioned by Wire Mesh

High-intensity (∼1 TW/cm2 and higher) region formed in the propagation of ∼60 GW, 90 fs Ti:Sapphire laser pulse on a ∼100 m path in air spans for several tens of meters and includes a plasma filament and a postfilament light channel. The intensity in this extended region is high enough to generate a...

Full description

Saved in:
Bibliographic Details
Published in:Sensors (Basel, Switzerland) Vol. 22; no. 17; p. 6322
Main Authors: Geints, Yuri E., Minina, Olga V., Geints, Ilia Yu, Seleznev, Leonid V., Pushkarev, Dmitrii V., Mokrousova, Daria V., Rizaev, Georgy E., Shipilo, Daniil E., Nikolaeva, Irina A., Kurilova, Maria V., Panov, Nikolay A., Kosareva, Olga G., Houard, Aurélien, Couairon, Arnaud, Ionin, Andrey A., Liu, Weiwei
Format: Journal Article
Language:English
Published: Basel MDPI AG 23-08-2022
MDPI
Subjects:
Atmospheric aerosols
beam regularization
Delay
Experiments
femtosecond filamentation
Femtosecond pulses
infrared supercontinuum
Lasers
Luminous intensity
Optics
Physics
Plasma
Propagation
Radiation
remote discharge triggering
Sapphire
Spectrum analysis
Wire cloth
Wire netting
infrared supercontinuum
femtosecond filamentation
remote discharge triggering
beam regularization
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:High-intensity (∼1 TW/cm2 and higher) region formed in the propagation of ∼60 GW, 90 fs Ti:Sapphire laser pulse on a ∼100 m path in air spans for several tens of meters and includes a plasma filament and a postfilament light channel. The intensity in this extended region is high enough to generate an infrared supercontinuum wing and to initiate laser-induced discharge in the gap between the electrodes. In the experiment and simulations, we delay the high-intensity region along the propagation direction by inserting metal-wire meshes with square cells at the laser system output. We identify the presence of a high-intensity region from the clean-spatial-mode distributions, appearance of the infrared supercontinuum wing, and occurrence of the laser-induced discharge. In the case of free propagation (without any meshes), the onset of the high-intensity zone is at 40–52 m from the laser system output with ∼30 m extension. Insertion of the mesh with 3 mm cells delays the beginning of the high-intensity region to 49–68 m with the same ∼30 m extension. A decrease in the cell size to 1 mm leads to both delay and shrinking of the high-intensity zone to 71–73 m and 6 m, respectively. Three-dimensional simulations in space confirm the mesh-induced delay of the high-intensity zone as the cell size decreases.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1424-8220
1424-8220
DOI:10.3390/s22176322