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1 April 2022 Picosecond ultrasonics with a free-running dual-comb laser
Justinas Pupeikis, Benjamin Willenberg, Francois Bruno, Mike Hettich, Alexander Nussbaum-Lapping, Matthias Golling, Carolin P. Bauer, Sandro L. Camenzind, Benayad Abdelmjid, Patrice Camy, Bertrand Audoin, Christopher R. Phillips, Ursula Keller
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Proceedings Volume PC11991, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXII; PC119910I (2022) https://doi.org/10.1117/12.2609555
Event: SPIE LASE, 2022, San Francisco, California, United States
Abstract
We present a free-running 80-MHz polarization-multiplexed solid-state dual-comb laser which delivers 1.8 Watts of average power with 110-fs pulse duration per comb. We apply this free-running dual-comb laser to picosecond ultrasonic measurements via a high-sensitivity pump-probe setup. We demonstrate ultrasonic measurements on thin-film samples, and compare our measurements to ones obtained with a pair of locked femtosecond lasers and x-ray diffraction measurements. Our data show that a free-running dual-comb laser is well-suited for picosecond ultrasonic measurements and thus it offers significant reduction in complexity and cost for this widely adopted non-destructive testing technique.
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Justinas Pupeikis, Benjamin Willenberg, Francois Bruno, Mike Hettich, Alexander Nussbaum-Lapping, Matthias Golling, Carolin P. Bauer, Sandro L. Camenzind, Benayad Abdelmjid, Patrice Camy, Bertrand Audoin, Christopher R. Phillips, and Ursula Keller "Picosecond ultrasonics with a free-running dual-comb laser", Proc. SPIE PC11991, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXII, PC119910I (1 April 2022); https://doi.org/10.1117/12.2609555
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KEYWORDS
Picosecond phenomena
Ultrasonics
Pulsed laser operation
Silica
Ultrafast lasers
Oscillators
Polarization
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