High-speed 3D imaging using a chaos lidar system

• Published in: The European physical journal. ST, Special topics Special topics, 2022, Vol.231 (3), p.435-441
• Main Authors: Ho, Hsin-Lin, Chen, Jun-Da, Yang, Ching-An, Liu, Chia-Chi, Lee, Cheng-Ting, Lai, Yu-Hsiang, Lin, Fan-Yi
• Format: Article
• Language: English
• Subjects: Atomic; Avalanche diodes; Bragg gratings; Classical and Continuum Physics; Condensed Matter Physics; Current Trends in Computational and Experimental Techniques in Nonlinear Dynamics; Field of view; High speed; Imaging; Lidar; Materials Science; Measurement Science and Instrumentation; Molecular; Optical and Plasma Physics; Physics; Physics and Astronomy; Regular Article; Sidelobes; Signal to noise ratio; Three dimensional imaging
• ISSN: 1951-6355; 1951-6401
• DOI: 10.1140/epjs/s11734-021-00410-8

We characterize a new chaos lidar system configuration and demonstrate its capability for high-speed 3D imaging. Compared with a homodyned scheme employing single-element avalanche photodetectors (APDs), the proposed scheme utilizes a fiber Bragg grating and quadrant APDs to substantially increase the system throughput, frame rate, and field-of-view. By quantitatively analyzing the signal-to-noise ratio, peak-to-standard deviation of the sidelobe level, precision, and detection probability, we show that the proposed scheme has better detection performance suitable for practical applications. To show the feasibility of the chaos lidar system, while under the constrain of eye-safe regulation, we demonstrate high-speed 3D imaging with indoor and outdoor scenes at a throughput of 100 kHz, a frame rate of 10 Hz, and a FOV of 24.5 ∘ × 11.5 ∘ for the first time.