A5043770446- Laser Material Processing Techniques
- Advanced Surface Polishing Techniques
- Cultural Heritage Materials Analysis
- Advanced Fiber Laser Technologies
- Laser-induced spectroscopy and plasma
- Ocular and Laser Science Research
- Planetary Science and Exploration
- Photonic Crystal and Fiber Optics
- Advanced machining processes and optimization
- Integrated Circuits and Semiconductor Failure Analysis
- Laser-Plasma Interactions and Diagnostics
- Nanofabrication and Lithography Techniques
- Optical Network Technologies
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2023-2025
Centre Lasers Intenses et Applications
2023-2025
Centre National de la Recherche Scientifique
2023-2025
ALPhANOV (France)
2024-2025
Université de Bordeaux
2023-2025
The femtosecond GHz-burst mode laser processing has attracted much attention in the last few years. Very recently, first percussion drilling results obtained glasses using this new regime were reported. In study, we present our latest on top-down glasses, focusing specifically influence of burst duration and shape hole rate quality drilled holes, wherein holes very high with a smooth glossy inner surface can be obtained. We show that decreasing energy repartition pulses within increase rate,...
Abstract A pump‐probe shadowgraphy study of femtosecond laser percussion drilling on glass samples is reported applying three different operating regimes, which are the standard repetitive single pulse, MHz‐ and GHz‐burst modes. The comparison imaging in MHz‐burst regimes demonstrated for first time to best knowledge. Synchronizing a pulse probe with pump burst regime constitutes real novelty micromachining studies. By this means, better understanding process dynamics two provided reveals...
Laser-driven ion acceleration, as produced by interaction of a high-intensity laser with target, is growing field interest. One the current challenges to enhance acceleration process, i.e., increase energy and number shape distribution for future applications. In this paper, we investigate effect helical coil (HC) targets on laser–matter process using 150 TW laser. We demonstrate that HC significantly proton improving bunching beam focusing increasing cutoff energy. For first time, extend...
We investigate the elongated modifications resulting from a Bessel beam-shaped femtosecond laser in fused silica under three different operation modes, i.e., single-pulse, MHz-burst, and GHz-burst regimes. The single-pulse MHz-burst regimes show rather similar behavior glass, featuring slightly tapered modifications. Subsequent etching with Potassium Hydroxide exhibits an rate selectivity of up to 606 μm/h 2103:1 322 2230:1 regime, respectively. Interestingly, mode, modification by single...
We report, for the first time to best of our knowledge, Bessel beam dielectrics cutting with a femtosecond laser in GHz-burst mode. The non-diffractive shaping is based on use an axicon and allows glasses up 1 mm thickness excellent quality. Moreover, we present comparison results state-of-the-art method, consisting short MHz-bursts pulses. further illustrate influence parameters such as burst energy pitch between consecutive beams machining quality plane provide process windows both regimes.
In this contribution, we present novel results on top-down drilling in silicon, the most important semiconductor material, focusing specifically influence of laser parameters. We compare holes obtained with repetitive single pulses, as well different MHz- and GHz-burst regimes. The deepest were mode, where achieved almost 1 mm depth 35 µm diameter, which corresponds to an aspect ratio 27, is higher than ones reported so far literature, best our knowledge. addition, study energy repartition...
In this contribution, we present a comparative study on top-down drilling in sodalime glass, with femtosecond laser operating single-pulse, MHz-burst and GHz-burst modes, respectively. We investigate the hole depth, rate, morphology for these three regimes while keeping same experimental conditions. demonstrate that, both burst regimes, length has to be adapted optimizing depth. regime, lower ablation rate longer holes. The lead different morphologies, where mode results best quality...
Four-wave mixing is investigated when chirped pump and signal pulses are injected in a photonic crystal fiber. The shot-to-shot stability of the amplified coherent was measured by using dispersive Fourier transform method compared with numerical simulations. We highlight that signal-to-noise ratio (SNR) pulsed increases power show it not deteriorated through amplification fiber optical parametric amplifier strongly saturated. SNR remains nearly constant after amplifier.
In this contribution we show through via drillings in dielectrics by ultrafast laser top-down percussion drilling GHzburst mode. We point out some limitations that occur during the process and how to overcome these. Finally, obtained vias of almost constant diameter Sodalime glass, which might be interest microelectronics industry for fabrication glass interposers.
In this study, we report, for the first time, to best of our knowledge, on in-volume glass modifications produced by GHz bursts femtosecond pulses. We compare three distinct methods energy deposition in glass, i.e., single-pulse, MHz burst, and burst regimes, evaluate resulting modifications. Specifically, investigate each regime under varying parameters such as pulse/burst energy, scanning velocity, number pulses with aim establishing welding process windows both sodalime fused silica.
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 different dielectrics new regime. The dependence burst parameters such as repetition rate, number pulses per burst, and energy are discussed. Moreover, will focus influence shape process. quality drilled holes their reachable dimensions presented.