Solid-state fmcw lidar using wdm with wideband external cavity tunable laser

Frequency-modulated continuous wave (FMCW) light detection and ranging (LiDAR) is a technology that measures the distance and velocity of objects using coherent detection. Conventional LiDAR using mechanical scanning systems suffer from low stability, large size, easy to wear, and high installation costs. We proposed a solid-state FMCW LiDAR system using wavelength division multiplexing (WDM) with a wideband external cavity tunable laser. The sample light, divided into N x M channels by WDM with 100 GHz (0.8 nm) channel spacing, is arranged through a fiber array in a N x M configuration. The proposed FMCW LiDAR system performs sequential solid-state scanning. We acquired 3D images without mechanical scanning, ensuring greater stability compared to conventional scanning systems.