The Construction of 4-D FMCW LiDAR Images by Directly Using Self-Heterodyne Beating Signal at Baseband and Linearization of Wavelength Sweeping Lasers

Yu-Xiang Lin

1:30 PM - 1:32 PM

[SO-PS-12-01] The Construction of 4-D FMCW LiDAR Images by Directly Using Self-Heterodyne Beating Signal at Baseband and Linearization of Wavelength Sweeping Lasers

Yu-Xiang Lin¹, Zohauddin Ahmad², Huan-Bin Yang², Ke-En Liao², You-Chia Chang³, Chia-Chien Wei¹, ^○Jin-Wei Shi² (1. National Sun Yat-sen University (Taiwan), 2. National Central University (Taiwan), 3. National Yang Ming Chiao Tung University (Taiwan))

This study presents a simple 4-D LiDAR system that utilizes low-frequency beating signals with a frequency as low as 100 kHz. Rather than up-conversion with an external modulator, we apply a linearization process to our DFB-based wavelength sweeping laser to suppress flicker noise in the baseband signal generated by beating, resulting in a high-quality 4-D image. The low-frequency signals simplify the design of DSP ICs. Additionally, by eliminating the need for an external modulator, our proposed architecture significantly improves the optical power budget in FMCW LiDAR systems.

2023 International Conference on Solid State Devices and Materials

[SO-PS-12-01] The Construction of 4-D FMCW LiDAR Images by Directly Using Self-Heterodyne Beating Signal at Baseband and Linearization of Wavelength Sweeping Lasers