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Authors: W. Bogaerts, S. Dwivedi, R. Jansen, X. Rottenberg, M.S. Dahlem
Title: A 2D Pixelated Optical Beam Scanner Controlled by the Laser Wavelength
Format: International Journal
Publication date: 8/2020
Journal/Conference/Book: IEEE Journal on Selected Topics in Quantum Electronics
Volume(Issue): 27(1)
DOI: 10.1109/JSTQE.2020.3017230
Citations: Look up on Google Scholar
Download: Download this Publication (8.5MB) (8.5MB)

Abstract

We present a chip-based optical beam scanner based on a dispersive optical phased array (OPA) that illuminates the far field with a pixelated pattern. To scale up the OPA to a large number of antennas, we break it up into manageable blocks with acceptable losses. The 2D wavelength scanning within a block is handled by dispersive delay lines. Between blocks, there are no delay lines, and the OPA will only have constructive interference for a discrete set of wavelengths. This results in the far-field illumination of a pixelated pattern along both x and y directions. The sidelobes and the power in the main lobe can be controlled by the power distribution of the individual OPA antennas.

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