All-optical real-time tracking of high-speed phenomena (Conference Presentation)

Thomas Godin; Pierre-Henry Hanzard; Ammar Hideur

doi:10.1117/12.2506896

4 March 2019 All-optical real-time tracking of high-speed phenomena (Conference Presentation)

Thomas Godin, Pierre-Henry Hanzard, Ammar Hideur

Proceedings Volume 10903, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications IV; 1090305 (2019) https://doi.org/10.1117/12.2506896
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

Real-time measurements are now mature enough to cover a wide span of applications from fundamental laser physics and dynamics to applied sciences. In this talk, we focus on the application of time-stretch techniques for the ultrafast imaging of non-repetitive ultrafast events. In particular, we show that amplified time-stretch imaging fills the gap between ultra-high frame rate imaging techniques (burst-mode and/or temporal mapping cameras) and continuous imagers (CCD/CMOS) as it allows MHz frame rates on long - ms - timescales. As an illustration, we demonstrate the real-time tracking - i.e. propagation and reflection - of single laser-induced shockwaves (SWs) with velocities exceeding a few km/s and show that it allows, on the one hand, to monitor its full dynamics, from its deceleration to the observation of the plasma contact wave, and, on the other hand, to easily acquire intensity and velocity statistics on large ensembles of SWs [1]. This study has numerous potential applications in applied physics e.g. in the study of transient phenomena in pulsed laser-material interactions as these dynamics indeed strongly impact many scientific fields such as micromachining, material analysis or high-harmonics generation, to name a few. We also report the use of 1-D amplified time-stretch imaging to capture the rupture of liquid ligaments, which could bring new insights in two-phase flows physics. [1] Hanzard et al., Appl. Phys. Lett. 112, 161106 (2018)

Conference Presentation

Citation Download Citation

Thomas Godin, Pierre-Henry Hanzard, and Ammar Hideur "All-optical real-time tracking of high-speed phenomena (Conference Presentation)", Proc. SPIE 10903, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications IV, 1090305 (4 March 2019); https://doi.org/10.1117/12.2506896

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KEYWORDS

Laser applications

Physics

Ultrafast imaging

Applied physics

Applied sciences

Cameras

Imaging systems

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