Control of characteristics of multiple filamentation of femtosecond laser pulses in air

2019 ◽  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Multiple Filamentation

The diffraction-ray model of single filamentation of femtosecond laser pulses for estimating characteristics of the multiple filamentation domain in air

2021 ◽  
Vol 64 (1) ◽  
pp. 154-164
Author(s):  
A.A. Zemlyanov ◽  
◽  
Y.E. Geints ◽  
O.V. Minina ◽  
◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Beam ◽  
Peak Power ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Small Scale ◽  
Beam Forming ◽  
Physical Processes ◽  
Multiple Filamentation ◽  
Number Increase

The characteristics of the domain of multiple filamentation of femtosecond laser pulses in air were estimated based on the single filamentation model. As the single filamentation model, the diffraction-ray model is considered. It is based on the representation of a laser beam as a set of diffraction-ray tubes nested in each other that do not intersect in space and do not exchange energy with each other. In this situation changes in tubes shape and cross section during propagation demonstrate the effect of physical processes that occur with radiation in the medium. It is shown that the use of this model for interpreting experimental results and predicting effects is effective. In particular, it was demonstrated that the radius of small-scale intensity inhomogeneities in the profile of a centimeter laser beam, forming the domain of multiple filamentation of subterawatt femtosecond laser pulses, is several millimeters. The power in these inhomogeneities varies from several units to several tens of gigawatts. Telescoping the initial laser beam, leading to an increase in its radius, also expands the sizes of the initial small-scale intensity inhomogeneities and reduces the power contained in them. As a result of this, the coordinate of the filamentation beginning shifts along the path from the source of laser pulses. As the peak power in the beam increases, the length of the filaments and their number increase.

Control of Multiple Filamentation of Femtosecond Laser Pulses in Air

2020 ◽  
Vol 33 (1) ◽  
pp. 42-50
Author(s):  
D. V. Apeksimov ◽  
Yu. E. Geints ◽  
A. A. Zemlyanov ◽  
A. M. Kabanov ◽  
G. G. Matvienko ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Multiple Filamentation

scholarly journals Optimization of multiple filamentation of femtosecond laser pulses in air using a pinhole

2007 ◽  
Vol 15 (24) ◽  
pp. 16102 ◽  
Author(s):  
Zuo-Qiang Hao ◽  
Jie Zhang ◽  
Ting-Ting Xi ◽  
Xiao-Hui Yuan ◽  
Zhi-Yuan Zheng ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Multiple Filamentation

Multiple filamentation of femtosecond laser pulses

2016 ◽  
Vol 80 (1) ◽  
pp. 64-67
Author(s):  
A. V. Kuznetsov ◽  
A. S. Kuzakov ◽  
E. F. Martynovich
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Multiple Filamentation

Multiple filamentation of intense femtosecond laser pulses in air

JETP Letters ◽  
2009 ◽  
Vol 90 (6) ◽  
pp. 423-427 ◽  
Author(s):  
A. A. Ionin ◽  
S. I. Kudryashov ◽  
S. V. Makarov ◽  
L. V. Seleznev ◽  
D. V. Sinitsyn
Keyword(s):  
Femtosecond Laser ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Multiple Filamentation
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