Picosecond ultrasonics with a free-running dual-comb laser
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EN
Article de revue
Ce document a été publié dans
Optics Express. 2021-10-15, vol. 29, n° 22, p. 35735
Résumé en anglais
We present a free-running 80-MHz dual-comb polarization-multiplexed solid-state
laser which delivers 1.8 W of average power with 110-fs pulse duration per comb. With a high-sensitivity pump-probe setup, we apply this ...Lire la suite >
We present a free-running 80-MHz dual-comb polarization-multiplexed solid-state
laser which delivers 1.8 W of average power with 110-fs pulse duration per comb. With a high-sensitivity pump-probe setup, we apply this free-running dual-comb laser to picosecond ultrasonic measurements. The ultrasonic signatures in a semiconductor multi-quantum-well structure originating from the quantum wells and superlattice regions are revealed and discussed. We further demonstrate ultrasonic measurements on a thin-film metalized sample and compare these measurements to ones obtained with a pair of locked femtosecond lasers. Our data show that a free-running dual-comb laser is well-suited for picosecond ultrasonic measurements and thus it offers a significant reduction in complexity and cost for this widely adopted non-destructive testing technique< Réduire
Mots clés en anglais
Brillouin scattering
Femtosecond lasers
Frequency combs
Quantum cascade semiconductor
lasers
Quantum wells
Solid state lasers
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