Dissertation/ Thesis
Gap materials interaction with femtosecond lasers in GHz-burst mode ; Etude de l’interaction des matériaux à gap avec des lasers femtosecondes en mode rafale GHz
| العنوان: | Gap materials interaction with femtosecond lasers in GHz-burst mode ; Etude de l’interaction des matériaux à gap avec des lasers femtosecondes en mode rafale GHz |
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| المؤلفون: | Balage, Pierre |
| المساهمون: | Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux, Inka Manek-Hönninger |
| المصدر: | https://theses.hal.science/tel-04730713 ; Physics [physics]. Université de Bordeaux, 2024. English. ⟨NNT : 2024BORD0164⟩. |
| بيانات النشر: | CCSD |
| سنة النشر: | 2024 |
| المجموعة: | HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
| مصطلحات موضوعية: | Light-matter interaction, Laser processing, GHz-bursts, Dielectrics, Semi-conductors, Interaction laser-Matière, Procédés laser, Rafales GHz, Diélectriques, Semi-conducteurs, [PHYS]Physics [physics] |
| الوصف: | Over the past two decades, femtosecond laser technology has become significantly more reliable which has particularly enabled its integration into industry, as the brevity of such pulses allows for high-precision micromachining. However, the adoption of this technology in the industry remains hindered by a lack of productivity. Indeed, the production rate remains well below the ever-evolving industry targets. To address this limitation, several methods are being studied to increase the throughput by optimizing femtosecond laser processes. One approach relies on optimizing the energy deposition by using bursts of low-intensity femtosecond pulses rather than single high-intensity pulses.Recent studies have shown that using GHz-bursts can achieve ablation efficiencies far superior to those obtained with more conventional methods. However, these initial results have been quickly challenged by other studies reporting lower efficiency and the presence of machining defects. To reach a consensus on this new regime, comprehensive experimental studies are needed to add data to the current state of the art. To this end, process studies such as microdrilling experiments and cutting with a Bessel beam have been implemented using a 100 W Amplitude laser delivering GHz-bursts. Close collaboration with the company Amplitude has allowed for investigating numerous burst parameters and conducting comparative studies with existing regimes (single-pulse and MHz-bursts). Moreover, a pump-probe experiment has been set up revealing the laser-matter interaction mechanism in GHz-burst mode. Throughout this thesis work, excellent results have been obtained, demonstrating the unique capability of GHz-bursts for microprocessing materials like dielectrics and semiconductors. ; Ces deux dernières décennies, la technologie laser femtoseconde a gagné en maturité et fiabilité. Cette évolution lui a permis d’être mise en œuvre dans de nombreux secteurs industriels pour des applications de micro-usinage de précision pour lesquelles la brièveté de ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | English |
| Relation: | NNT: 2024BORD0164 |
| الاتاحة: | https://theses.hal.science/tel-04730713 https://theses.hal.science/tel-04730713v1/document https://theses.hal.science/tel-04730713v1/file/BALAGE_PIERRE_2024.pdf |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.619A85B9 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |