High-resolution LiDAR and spectroscopy enabled by coherent sensing with single-cavity dual-comb laser

Christopher R. Phillips; Sandro L. Camenzind; Benjamin Willenberg; Justinas Pupeikis; Ursula Keller

doi:10.1117/12.2649762

9 March 2023 High-resolution LiDAR and spectroscopy enabled by coherent sensing with single-cavity dual-comb laser

Christopher R. Phillips, Sandro L. Camenzind, Benjamin Willenberg, Justinas Pupeikis, Ursula Keller

Proceedings Volume PC12428, Photonic Instrumentation Engineering X; PC124280G (2023) https://doi.org/10.1117/12.2649762
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

We demonstrate a system for high-precision, high-resolution and long-range LiDAR measurements using dual optical frequency combs. The system uses a new type of single-cavity dual-comb solid-state laser combined with a fiber-based apparatus for detection of the light reflected by a target. The fiber setup implements heterodyne detection with the roles of the two combs interchanged, thereby using the Vernier effect to extend the ambiguity range beyond the inverse of the laser repetition rate. With this approach, we obtain sub-micron precision with >10 meter range (scalable to kilometers) using a time-of-flight based approach to analyze the digitized interferogram signal.

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Citation Download Citation

Christopher R. Phillips, Sandro L. Camenzind, Benjamin Willenberg, Justinas Pupeikis, and Ursula Keller "High-resolution LiDAR and spectroscopy enabled by coherent sensing with single-cavity dual-comb laser", Proc. SPIE PC12428, Photonic Instrumentation Engineering X, PC124280G (9 March 2023); https://doi.org/10.1117/12.2649762

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KEYWORDS

Spectroscopy

LIDAR

Heterodyning

Distance measurement

Frequency combs

Signal detection

Solid state lasers

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