Linearization of wavelength sweeping lasers for the construction of 4-D FMCW LiDAR images of slow-moving objects using baseband beat note signals

Yu Kuan Tsai, Zheng Xiang Liao, Yu Xiang Lin, H. S. Chen, Jack Jia Sheng Huang, Pei Hsun Wang, Chia Chien Wei, You Chia Chang, Yung Hung, Jin Wei Shi

Research output: Contribution to journalArticlepeer-review

Abstract

A FMCW LiDAR system of both the distributed feedback laser and external cavity laser is established in baseband beat notes, rather than up-conversion to an intermediate frequency to exclude flicker noise. Meanwhile, utilizing fast-scanningMEMSmirrors, high-quality real-time (1 fps) 4-D images of the slow-moving object (10 mm/s) can be directly constructed at the baseband with a central frequency as low as 100 kHz and a small Doppler shift. The proposed LiDAR architecture based on such a low-frequency baseband significantly improves the optical power budget on the transmitter side and eliminates the costly high-speed sampling circuits on the receiver side.

Original languageEnglish
Pages (from-to)20401-20411
Number of pages11
JournalOptics Express
Volume32
Issue number11
DOIs
StatePublished - 20 May 2024

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