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Advances on Percussion Drilling with Femtosecond Laser in GHz-burst Mode [PDF]

open access: yesEPJ Web of Conferences, 2023
Micromachining of various materials with femtosecond lasers operating in the GHz-burst regime has recently attracted great attention. In this contribution, we show our latest results on top-down percussion drilling in different dielectrics in this new ...
Balage Pierre   +7 more
doaj   +1 more source

Near-single-cycle pulses generated through post-compression on FAB1 laser at ATTOLAB-Orme facility [PDF]

open access: yesEPJ Web of Conferences, 2021
Generating high-energy few-cycle pulses is key in the study of light-matter interaction in the regime of high field physics. Attosecond science possess the necessary time resolution to study the underlying fundamental processes but requires repetitions ...
Hergott Jean-François   +12 more
doaj   +1 more source

Characterization of the water flow regime of the rivers from the Căliman Mountains (1950-2010) based on the Pardé Coefficient. [PDF]

open access: yesRiscuri şi Catastrofe, 2021
The Pardé coefficient, first introduced by Maurice Pardé in 1933, is the most famous water regime classification system in the world, and can be calculated and adapted to any river on the globe, based only on the average flow of rivers.
C. HÎRLAV, A. PORCUȚAN
doaj   +1 more source

Advances in Femtosecond Laser GHz-Burst Drilling of Glasses: Influence of Burst Shape and Duration

open access: yesMicromachines, 2023
The femtosecond GHz-burst mode laser processing has attracted much attention in the last few years. Very recently, the first percussion drilling results obtained in glasses using this new regime were reported. In this study, we present our latest results
Pierre Balage   +8 more
doaj   +1 more source

High efficiency GHz laser processing with long bursts

open access: yesInternational Journal of Extreme Manufacturing, 2023
Bursts of GHz repetition rate pulses involve more ablation mechanisms than single femtosecond pulses. Efficient ablation by GHz laser pulses is a multi-step process, consisting of a first thermal incubation phase, followed by a highly efficient ablation ...
Eric Audouard, Eric Mottay
doaj   +1 more source

Bessel Beam Dielectrics Cutting with Femtosecond Laser in GHz-Burst Mode

open access: yesMicromachines, 2023
We report, for the first time to the best of our knowledge, Bessel beam dielectrics cutting with a femtosecond laser in GHz-burst mode. The non-diffractive beam shaping is based on the use of an axicon and allows for cutting glasses up to 1 mm thickness ...
Pierre Balage   +6 more
doaj   +1 more source

Comparative Study of Percussion Drilling in Glasses with a Femtosecond Laser in Single Pulse, MHz-Burst, and GHz-Burst Regimes and Optimization of the Hole Aspect Ratio

open access: yesMicromachines, 2023
In this contribution, we present a comparative study on top-down drilling in sodalime glass, with a femtosecond laser operating in single-pulse, MHz-burst and GHz-burst modes, respectively.
Pierre Balage   +6 more
doaj   +1 more source

Crack-free high-aspect ratio holes in glasses by top–down percussion drilling with infrared femtosecond laser GHz-bursts

open access: yesInternational Journal of Extreme Manufacturing, 2022
We report novel results on top-down percussion drilling in different glasses with femtosecond laser GHz-bursts. Thanks to this particular regime of light – matter interaction, combining non-linear absorption and thermal cumulative effects, we obtained ...
Pierre Balage   +4 more
doaj   +1 more source

Normative values of visual evoked potential in adults

open access: yesIndian Journal of Ophthalmology, 2021
Purpose: Visual evoked potentials (VEP) are used to determine the function of visual pathway from the optic nerve to visual cortex. Various factors may affect VEP response, viz., technical and environmental.
Merry Septemi Ekayanti   +2 more
doaj   +1 more source

Comparison of Propofol and Ketofol on Transcranial Motor Evoked Potentials in Patients Undergoing Thoracolumbar Spine Surgery [PDF]

open access: yesAsian Spine Journal, 2022
Study Design This was a double-blind randomized study. Purpose The primary purpose was to compare the effects of propofol and ketofol on amplitudes and latencies of transcranial motor evoked potentials (TcMEPs) during thoracolumbar spine surgery.
Ankur Khandelwal   +4 more
doaj   +1 more source

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