Manipulation of femtosecond laser multi-filament array by spatiotemporal phase modulation

Wang, Jianji; Guo, Yi; Song, Xiaowei; Lin, Jingquan

doi:10.1016/j.optcom.2021.127113

Cited by 5 publications

(1 citation statement)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Negative chirp leads to the pulse compression and increase in the overall plasma string extension [21,22]. The transverse spatial modulation of the beam with the power P P cr enables pulse energy segmentation into several sub-apertures, thus providing the transverse regularization of the inherently stochastic multiple filamentation [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. For example, a "coronary" beam [36,38,39] composed of several coherent sub-beams with P > P cr arranged in a ring moves the filament onset away from the laser system output.…”

Section: Introductionmentioning

confidence: 99%

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

Geints

Minina

Geints

et al. 2022

Sensors

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

Geints

Minina

Geints

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

Flexible manipulation of the onset and terminal positions of femtosecond laser filamentation in fused silica via controlling beam profile before axicon

Wang

Guo

Song

et al. 2022

Optics Communications

View full text Add to dashboard Cite

Multi-dimensional control of femtosecond laser filaments by inserting a wedge plate in the forced focusing region

et al. 2022

View full text Add to dashboard Cite

Modulating the length and position of plasma filament is desired for many filament-based applications. We proposed a novel method to manipulate the properties of filament along the propagation direction by introducing asymmetric focusing with a wedge plate in the forced focusing region. By simply varying the inclination degree of a wedge and the distance between the wedge and lens, a plasma filament can break into two sub-filaments along the propagation direction, and the separation between sub-filaments can be controlled. The experiment results are in agreement with the results of simulation by the ray-tracing method. Furthermore, the effect of the wedge angle and rotation angle on the control of the filament is studied. It is found that the separation of the sub-filaments and the azimuth angle of the filament around the original optical axis can be controlled by the wedge angle and rotation angle of the wedge, respectively. When combined with a phase plate, the control method also shows the ability to modulate the multi-filament array with wavefront modification. Our research provides a simple and flexible method for 3-D control of femtosecond laser filaments for practical applications.

show abstract

Manipulation of femtosecond laser multi-filament array by spatiotemporal phase modulation

Cited by 5 publications

References 33 publications

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

Flexible manipulation of the onset and terminal positions of femtosecond laser filamentation in fused silica via controlling beam profile before axicon

Multi-dimensional control of femtosecond laser filaments by inserting a wedge plate in the forced focusing region

Contact Info

Product

Resources

About