107  MHz point acquisition ultrafast 3D imaging via optical code-division multiple access

High-speed 3D perception in dynamic environments requires LiDAR systems with extremely high point acquisition rates (PARs). Existing methods for increasing PARs often involve complex hardware setups yet remain limited in speed, failing to meet the demands of high-dynamic-range sensing. We propose an all-optical encoded ultrafast LiDAR based on optical code-division multiple access (OCDMA). By decomposing a broadband source into 40 spectral channels via wavelength-division multiplexing (WDM) and applying six-pulse sequence encoding through fiber-delay-line-based all-optical encoding, we achieve simultaneous emission and independent decoding of all channels. Leveraging exceptional code orthogonality and the inherently narrow pulse width of all-optical encoding, a PAR of 107.6 MHz—one that surpasses all existing counterparts within the same architectural category by an order of magnitude—and a ranging accuracy of ∼3 mm are demonstrated. We further showcase high-fidelity 3D reconstruction of static targets and dynamic imaging of a chopper, achieving a high frame rate of 10.8 kHz (83×120 points) by inter-axis rate matching of spectral-acousto-optic scanning. The system architecture offers high integration compatibility and provides a feasible technological pathway for next-generation high-speed autonomous driving and industrial vision systems.