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A silicon chip with a serpentine optical phased array (SOPA), developed by researchers at the University of Colorado Boulder, could improve the resolution and scanning speed of lidar systems while reducing bulkiness, making them scalable for a range of applications.
The SOPA is based on an array of low-loss grating waveguides and supports passive, 2D wavelength-controlled beam steering. The beams are controlled by changing wavelengths. Multiple phased arrays can be controlled simultaneously to create a bigger aperture and a higher-resolution image. Compact, wavelength-steered tiles are packed efficiently into the array and do not require active control. The space-efficient design enables scalable tiling of SOPAs into large apertures….READ MORE