Published: Jan. 1, 2024
We present the first experiments and characterization of filamentation at high energy repetition rates (≥ 10 kHz), showing a quasi-stationary depletion offering improved electric discharge triggering guidelines for future laser research.
Language: Английский
Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(17)
Published: April 28, 2025
The advent of high-average-power, ultrafast ytterbium-based lasers allows us to generate laser filaments at repetition rates ranging from tens kHz up hundreds kHz. At such high-repetition rates, the inter-pulse time lies below required for total diffusion deposited heat by each pulse, leading cumulative hydrodynamic effects. Here, we present experimental time-resolved measurements these dynamics in air between 1 and 100 We measure change refractive index caused localized deposition length filament-generated plasma channel, with which can infer corresponding density. observe that above 10 kHz, stationary density depletions vanishing emerge. Our findings are wide relevance fields high-repetition-rate filamentation its applications as well THz generation laser-induced sources.
Language: Английский
Citations
0
Applied Physics Letters, Journal Year: 2024, Volume and Issue: 124(15)
Published: April 8, 2024
We study the influence of gravitational force on generation low-density channels air left in path femtosecond laser filaments at high repetition rate. observe a more important density variation along filament longitudinal axis case vertically created as compared to horizontal one. This leads reduction electrical breakdown field using vertical filament. geometry induced difference is only observed rate because it directly related cumulative effect appearing above 100 Hz.
Language: Английский
Citations
3
Optics Express, Journal Year: 2024, Volume and Issue: 32(16), P. 28048 - 28048
Published: July 9, 2024
The femtosecond laser filamentation is of significant interest due to its remarkable characteristics, and determining the critical power self-focusing essential for process filamentation. In this work, intense pulses at different repetition rates experimentally measured according focus-shift method. A bimodal fitting method proposed more accurately determine power. It found that decreases as rate increases. numerical simulation based on modified nonlinear Schrödinger equation effectively explains experimental results obtained. This work provides valuable insights generation application high
Language: Английский
Citations
3
Published: Jan. 26, 2024
Modern USPL (Ultra Short Pulse Laser) development is trending towards higher repetition rates and average power systems. High peak power, low rate USPLs have long been used to generate laser filaments, which consist of a plasma channel region focused high intensity propagation. Filamentation leads heat deposition in the air from linear nonlinear effects, producing gas density depression that persists over hydrodynamic timescales (milliseconds). This after femtosecond pulse has passed. In "single shot" (approximately 10 Hz) regime filamentation, time between pulses allows return equilibrium before next arrives. Prior work experimentally measured single shot via interferometry demonstrated filamentation deflection subsequent due residual heating prior pulses. examines thermal blooming as function rate. Residual effects are through measurements energy by filament. The temporally spatially resolved extracted interferometric phase shift depression. Comparison made experimentation modeling, well verification past results. demonstrates how atmospheric propagation modern differ traditional
Language: Английский
Citations
0
Reports on Progress in Physics, Journal Year: 2024, Volume and Issue: 87(11), P. 116401 - 116401
Published: Sept. 17, 2024
The recent development of high average, peak power lasers has revived the effort using as a potential tool to influence natural lightning. Although impressive, current progress in laser lightning control technology may only be beginning new area involving positive feedback between powerful and atmospheric research. In this review paper, we critically evaluate past, present future Laser Lightning Control (LLC), considering both its technological scientific significance
Language: Английский
Citations
0
Published: Jan. 1, 2024
We present the first experiments and characterization of filamentation at high energy repetition rates (≥ 10 kHz), showing a quasi-stationary depletion offering improved electric discharge triggering guidelines for future laser research.
Language: Английский
Citations
0