Effects of a variable linewidth laser and variable linewidth shape laser on coherent FMCW LiDAR

Abstract

To investigate the tolerance of laser linewidth, a stable and variable light source is essential. This study proposes a novel method for generating a variable linewidth and variable light source using a lithium niobite phase modulator, achieved through the application of white Gaussian noise and random walk noise with a limited wall. The proposed approach was thoroughly examined through equations, simulations, and experiments. Further, a practical application was demonstrated while investigating the effects of variable linewidth and shape on FMCW LiDAR performance. The results highlight the importance of optimizing the light source for LiDAR applications to ensure the maximum accuracy and resolution.