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Authors: W. Bogaerts, M. Dahlem, S. Dwivedi, R. Jansen, X. Rottenberg
Title: Dispersive optical phased array circuit for high-resolution pixelated 2D far-field scanning controlled by a single wavelength variable
Format: International Conference Proceedings
Publication date: 2/2020
Journal/Conference/Book: Photonics West (OPTO) (invited)
Editor/Publisher: SPIE, 
Volume(Issue): 11284 p.112841Z
Location: San Francisco, United States
DOI: 10.1117/12.2544937
Citations: Look up on Google Scholar
Download: Download this Publication (4.2MB) (4.2MB)

Abstract

We propose a 2D scanning optical phased array circuit that reconciliates the requirements of resolution and range in automotive LiDAR. Using only the wavelength of the laser source to scan in both x and y directions, we generate a discrete pixelated pattern in the far field, with both the required resolution and a sufficiently long Rayleigh range. We start from a 2D dispersive optical phased array consisting of wavelength-dependent grating coupler antennas and long delay lines with sufficient angular resolution, and then combine these into a larger array to achieve the required range specifications.

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