Results 1 to 10 of about 1,216,217 (257)
Advances on Percussion Drilling with Femtosecond Laser in GHz-burst Mode [PDF]
EPJ 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]
EPJ 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
High efficiency GHz laser processing with long bursts
International 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
Advances in Femtosecond Laser GHz-Burst Drilling of Glasses: Influence of Burst Shape and Duration
Micromachines, 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
Bessel Beam Dielectrics Cutting with Femtosecond Laser in GHz-Burst Mode
Micromachines, 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
Micromachines, 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
International 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
Effect of Umbilical Cord Ferritin Level on Auditory Brainstem Response Threshold in Newborns [PDF]
Iranian Journal of Otorhinolaryngology, 2020 Introduction: Iron plays an important role in myelination. Ferritin is a reliable indicator of the tissue iron store and umbilical cord ferritin level reflects the in utero iron stores.
Soumyajit Das +4 more
doaj +1 more source
STATISTIC OF SEASONAL AND DIURNAL VARIATIONS OF DOPPLER FREQUENCY SHIFT OF HF SIGNALS AT MID-LATITUDE RADIO PATH [PDF]
Radio Physics and Radio Astronomy, 2020 Purpose: An experimental study of signatures of traveling ionospheric disturbances (TID) observed in diurnal-seasonal variations of the parameters of probe HF signals propagating on theoblique single-hop RWM–LFO radio path, derived from the yearlong ...
A. I. Reznychenko +3 more
doaj +1 more source
Normative values of visual evoked potential in adults
Indian 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