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Hdr Année : 2019

Ultrafast Laser Processing using Optimized Spatial Beam Control

Cyril Mauclair

Résumé

Writing the so-called ’HDR’ manuscript (standing for the french ’Habilitation à Diriger la Recherche’) is a somewhat frightening exercise. It is naturally difficult to look back and try to summarize years of research and collaborations. More delicate is to present the advances in the frame of the most recent scientific and technological results while trying to correctly describe the state of the art. Anticipating the next developments of a fast-evolving field of research such as ultrafast laser machining is not an easier task either. However, this step appears to be indispensable in a researcher’s career when the time comes to choose the next research efforts to be conducted. I would like here to use once and only once the famous sentence that this manuscript is written "to the best of my knowledge", hoping this will excuse any short-comings and mistakes in describing the state of the art of ultrafast laser micro machining and how my work stands in this international context. Let me clarify straight away the unclear expression "my work". Behind this, one has to realize that this involve far more than what my brain alone could have ever produce, even under the most efficient drugs. Indeed, a very large group of people including patient and passionate PhD supervisors and co-supervisors, friendly and hard-working colleagues, long-suffering PhD students and postdocs altogether with an enthusiastic and caring community has to be recognized here. I also want to add on the list the many people from other scientific and research communities. It is puzzling how multi disciplinary approaches can bring together the right people at the right moment, creating the appropriate frame for breakthroughs and innovative work. I will try to give some examples of this fact that I had the chance to notice during my career. Ultrafast laser pulses have also this unique property to trigger a deep curiosity in anyone who comes to deal with them. Sometimes appearing as a magical solution’ but still being in competition with much more experienced and mastered processes, this short wavepackets of light have not ceased to surprise the world and find more and more applications, not to mention here the 2018’s Nobel Prize recognizing as a major breakthrough the possibility to amplify these pulses. I hope that this manuscript, with the efforts made to render the reading accessible and the concepts easily understandable, can trigger such interest to the largest possible audience.
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tel-04506968 , version 1 (15-03-2024)

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  • HAL Id : tel-04506968 , version 1

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Cyril Mauclair. Ultrafast Laser Processing using Optimized Spatial Beam Control. Optics / Photonic. Université Jean Monnet Saint Etienne, 2019. ⟨tel-04506968⟩
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