Publications by authors named "Nam-Hyun Kwon"
Precise imaging in three-dimension (3D) is an essential technique for solid-state light detection and ranging (LiDAR). Among various solid-state LiDAR technologies, silicon (Si) optical phased array (OPA)-based LiDAR has the significant advantage of robust 3D imaging due to its high scanning speed, low power consumption, and compactness. Numerous techniques employing a Si OPA have utilized two-dimensional arrays or wavelength tuning for longitudinal scanning but the operation of those systems is restricted by additional requirements.
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- The study showcases a passive silica optical phased array that allows for beam steering by varying the wavelength across arrayed waveguide channels, creating sequential phase delays.
- The system demonstrated effective beam forming with a narrow divergence angle of 0.57° at 1548.3 nm and achieved a steering angle of 15.4° with a wavelength change of 30.7 nm.
- Additionally, by using a cylindrical lens, the longitudinal divergence angle was improved significantly, and simulations were conducted to understand how phase errors in the waveguide channels impact beam quality.