Frequency decoding using a dual interferometer for extending the measurable range

Ji Hyeok Lee; Min Uk Jung; Gyeong Hun Kim; Chang-Seok Kim

doi:10.1117/12.2650972

9 March 2023 Frequency decoding using a dual interferometer for extending the measurable range

Ji Hyeok Lee, Min Uk Jung, Gyeong Hun Kim, Chang-Seok Kim

Proceedings Volume PC12428, Photonic Instrumentation Engineering X; PC124280B (2023) https://doi.org/10.1117/12.2650972
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Frequency-modulated continuous wave (FMCW) light detection and ranging (LiDAR) is attractive as the next generation of LiDAR. Since FMCW LiDAR is an optical method of measuring a distance using light interference, the distance measurement range is limited according to the coherence length of laser light. For this reason, FMCW LiDAR is forced to use a special laser with a long coherence length. In this study, we propose to increase the measurable distance range through a novel frequency decoding method using a dual interferometer. Experimentally, we can increase the measurable distance over the full range of coherence length.

Conference Presentation

Citation Download Citation

Ji Hyeok Lee, Min Uk Jung, Gyeong Hun Kim, and Chang-Seok Kim "Frequency decoding using a dual interferometer for extending the measurable range", Proc. SPIE PC12428, Photonic Instrumentation Engineering X, PC124280B (9 March 2023); https://doi.org/10.1117/12.2650972

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