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12 March 2024 Time-domain coherent LiDAR based on wavelength-dependent reference arm
Dahun Jung, Gyeong Hun Kim, Min Uk Jung, Chang-Seok Kim
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Proceedings Volume PC12893, Photonic Instrumentation Engineering XI; PC128930J (2024) https://doi.org/10.1117/12.3003616
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
For frequency modulated continuous wave (FMCW) light detection and ranging (LiDAR), which is long-distance 4D measurement technology, fast Fourier transform (FFT) is necessary which requires high-performance computing devices. As the measurement target moves away, the measurable distance is limited by the increased beat frequency and coherence length of the light source. In this study, time-domain coherent LiDAR system was designed using chirped fiber Bragg grating (CFBG) at the reference arm. The proposed technology can measure distance without FFT and regardless of the coherence length of the light source. We acquired distance information and 3D images of targets over 10 meters.
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Dahun Jung, Gyeong Hun Kim, Min Uk Jung, and Chang-Seok Kim "Time-domain coherent LiDAR based on wavelength-dependent reference arm", Proc. SPIE PC12893, Photonic Instrumentation Engineering XI, PC128930J (12 March 2024); https://doi.org/10.1117/12.3003616
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KEYWORDS
LIDAR
Distance measurement
Light sources
Bragg wavelengths
Optical path differences
Signal detection
Signal intensity
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