High-power sub-picosecond filamentation at 1.03 µm with high repetition rates between 10 and 100 kHz

Article Article scientifique Article High-power sub-picosecond filamentation at 1.03 µm with high repetition rates between 10 and 100 kHz eng 2023-11-20 2023-11-01 author Löscher Robin 0009-0005-5673-338X author Moreno Victor 0000-0002-5731-5615 939546 Serv com physique appliquée (FIGCO) author Adamou Dionysis 0009-0006-6390-3583 author Kesim Denizhan K. 0000-0002-6755-4425 author Schroeder Malte C. 0000-0003-4895-6354 author Clerici Matteo 0000-0002-9100-8539 89668 author Wolf Jean-Pierre 0000-0003-3729-958X 631266 unités directement rattachées à la section de physique (FIRA) author Saraceno Clara J. 0000-0002-7369-9057 111303 10.1063/5.0175100 2378-0967 https://pubs.aip.org/app/article/8/11/111303/2922183/High-power-sub-picosecond-filamentation-at-1-03-m Filamentation has extensively been explored and is well understood at repetition rates &lt;1 kHz due to the typical availability of multi-mJ laser systems at a moderate average power. The advent of high-power Yb-lasers opened new possibilities for filamentation research. However, so far, high average power Yb systems have mostly been explored to increase the driving pulse energy to several hundreds of mJ and not at significantly higher repetition rates. In this paper, we study, for the first time, long filaments at unprecedented high repetition rates of 10, 40, and 100 kHz using a 500-W Yb-doped thin-disk amplifier driver operating with sub-700 fs pulses. We compare the filament length, density hole, and fluorescence at a constant peak power but different repetition rates and find a strong dependence on filament length and density depletion with repetition rate. Our analysis reveals the emergence of a significant stationary density depletion at repetition rates of 40 and 100 kHz. The corresponding reduction in the breakdown threshold by increasing the laser repetition rate observed in our study signifies a promising avenue for enhancing the efficiency and reliability of electric discharge triggering in various scenarios. Using capacitive plasma probe measurements, we address the limitations of fluorescence imaging-based measurements and demonstrate a systematic underestimation of filament length. This work contributes to a deeper understanding of the interplay between laser repetition rates, filamentation, and heat-driven density depletion effects from high-repetition-rate high-power laser systems and will contribute to guiding future research, making use of filaments at high repetition rates. Dewey 500.2 European Commission Fellowship Program of the NCCR MUST (National Competence Center for Research in Molecular Ultrafast Science and Technology) and the Cluster of Excellence RESOLV 801459 FP-RESOMUS EU H2020 European Commission Compact and powerful strong-field terahertz light source for exploring water in new regimes 805202 TerAqua EU H2020 35 Groupe de physique appliquée 135 false 676 Groupe Wolf APL photonics 8 11 0bb51cca-cf59-4b33-aea1-9d84a7baf5ef Article (Published version) Public Article-scientifique-from-unpaywall.pdf 6535424 application/pdf CC BY 22e4792abf3324a9b614d50e9fe4eb24c7e2f343e126b2861032a23c6d09a5b2 openAccess Faculté des sciences / Section de physique / Groupe de physique appliquée

Title	Published in	Access level	OA Policy	Year	Views	Downloads

High-power sub-picosecond filamentation at 1.03 µm with high repetition rates between 10 and 100 kHz	APL photonics			2023	120	120

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