A large-scale coherent imager with digital beamforming

V. Gurses, D. Sarkar, A. Khachaturian, M. Reza Hashemi, A. Hajimiri

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We showcase a 128-element nanophotonic coherent imager with a parallelized readout. This architecture enables single-shot coherent optical imaging without the need for on-chip phase shifting and beam scanning. Using 6 elements, we demonstrate digital beamforming and coherent image reconstruction with a 1.67 beamwidth over an 8.30 field-of-view.

 

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