A large-scale coherent 4D imaging sensor - Nature

"Across various fields, from spatial mapping for reconnaissance and construction to facial recognition, virtual and augmented reality and autonomous driving, accurate 3D representation of dynamically evolving environments is paramount for safe human-machine interaction. Therefore, substantial research efforts are directed towards developing a cost-effective, high-performance and scalable 3D imaging sensor comparable with a CMOS camera."

"LiDAR systems represent an ideal tool for 3D image reconstruction, owing to their extended range, high precision and fine spatial resolution. Time-of-flight LiDAR systems based on single-photon avalanche diode arrays are used in various applications, including consumer electronics, owing to their low power consumption, affordability and compact design."

"Silicon-photonics-based LiDARs offer the potential to integrate all essential imaging components, from the light source to imaging elements and control electronics into a compact, cost-effective and power-efficient 3D imaging solution, taking advantage of the existing CMOS infrastructure."

Automation across industries requires accurate 3D environmental representation for safe human-machine interaction in applications like autonomous driving, facial recognition, and spatial mapping. LiDAR systems provide ideal 3D image reconstruction with extended range and high precision. Time-of-flight LiDAR using single-photon avalanche diodes offers low power consumption and compact design but requires significant energy per point for long-range automotive applications, limiting spatial resolution. Silicon photonics-based solid-state beam scanners present an alternative platform, leveraging existing CMOS infrastructure to integrate all essential imaging components into a single, compact, power-efficient solution with potential for improved performance and scalability.

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