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13 March 2024 Wide-field third-harmonic imaging of femtosecond laser-induced in-volume modifications
Chrysoula Stathaki, Olivier Bernard, Vasiliki Stergiopoulou, Matthieu Simeoni, Martin Vetterli, Jeff A. Squier, Yves Bellouard
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Proceedings Volume PC12875, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIV; PC128750C (2024) https://doi.org/10.1117/12.3005671
Event: SPIE LASE, 2024, San Francisco, California, United States
Abstract
Lately, the use of ultrafast in-volume laser-based processing of transparent materials has gained ground as a 3D-printing method of functional materials, photonics devices and high-density storage media. In this talk, we discuss the use of wide-field third-harmonic imaging that offers a non-destructive means for investigating and characterizing laser-written in-volume complex structures. Specifically, the method is used for identifying laser-induced modifications and establishing their taxonomy over a large area of a material. Unlike confocal arrangements, its ability to capture both the direct and scattered signal enables the collection of comprehensive information related to the local laser-induced modifications. Its inline nature allows for in situ monitoring of the material's response to various laser exposure conditions. As future prospect, it offers a pathway towards the implementation of closed-loop control algorithms, guaranteeing the accuracy and consistency of the desired modifications.
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Chrysoula Stathaki, Olivier Bernard, Vasiliki Stergiopoulou, Matthieu Simeoni, Martin Vetterli, Jeff A. Squier, and Yves Bellouard "Wide-field third-harmonic imaging of femtosecond laser-induced in-volume modifications", Proc. SPIE PC12875, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIV, PC128750C (13 March 2024); https://doi.org/10.1117/12.3005671
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KEYWORDS
Femtosecond phenomena
Laser processing
Materials processing
Near ultraviolet
Nondestructive evaluation
Photonic devices
Taxonomy
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