Multi-channel beam scanning of coherent LiDAR using WDM

Huiyeon Kim; Min Uk Jeong; Chang-Seok Kim

doi:10.1117/12.3003612

12 March 2024 Multi-channel beam scanning of coherent LiDAR using WDM

Huiyeon Kim, Min Uk Jeong, Chang-Seok Kim

Proceedings Volume PC12893, Photonic Instrumentation Engineering XI; PC128930I (2024) https://doi.org/10.1117/12.3003612
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

In this study, a multi-channel beam scanning of a coherent LiDAR (light detection and ranging) system was developed using WDM (wavelength division multiplexing) to overcome the limitations of the conventional single-beam approach, particularly its lower imaging speed. The experimental setup involved adding a WDM module to a Mach-Zehnder-type fiber-based interferometer. The original beam was divided into beams with different center wavelengths using WDM. These beams are directed at the target with a 1D Galvo scanner to build the x-y image. Interference signals between sample and reference lights were analyzed by each individual channel, enabling distance calculations through a fast Fourier transform. The proposed system with multi-channel beam scanning successfully improved scanning speed and obtained 3D images.

Conference Presentation

Citation Download Citation

Huiyeon Kim, Min Uk Jeong, and Chang-Seok Kim "Multi-channel beam scanning of coherent LiDAR using WDM", Proc. SPIE PC12893, Photonic Instrumentation Engineering XI, PC128930I (12 March 2024); https://doi.org/10.1117/12.3003612

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