Long-distance dual-comb ranging in real-time with an update rate of 7.7-kHz using a free-running laser

Lukas Lang; Sandro L. Camenzind; Benjamin Willenberg; Robert Presl; Christopher R. Phillips; Ursula Keller

doi:10.1117/12.3002228

12 March 2024 Long-distance dual-comb ranging in real-time with an update rate of 7.7-kHz using a free-running laser

Lukas Lang, Sandro L. Camenzind, Benjamin Willenberg, Robert Presl, Christopher R. Phillips, Ursula Keller

Proceedings Volume PC12893, Photonic Instrumentation Engineering XI; PC1289306 (2024) https://doi.org/10.1117/12.3002228
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

We demonstrate a system based on dual-comb LiDAR that can measure absolute distances at a high update rate of 7.7 kHz in real-time. This is enabled by a novel LiDAR frontend combined with a GPU-accelerated algorithm, which allows for real-time reconstruction of the target’s position. We track the movements of a retroreflector attached to a trolley on a comparator bench at distances of around 35 m and 50 m for 10 s. Comparing the relative measurements to a reference Doppler interferometer, we find that we can track the target’s motion with micrometer-level residual errors, even over these long distances.

Conference Presentation

Citation Download Citation

Lukas Lang, Sandro L. Camenzind, Benjamin Willenberg, Robert Presl, Christopher R. Phillips, and Ursula Keller "Long-distance dual-comb ranging in real-time with an update rate of 7.7-kHz using a free-running laser", Proc. SPIE PC12893, Photonic Instrumentation Engineering XI, PC1289306 (12 March 2024); https://doi.org/10.1117/12.3002228

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