On-chip platform for a phased array with minimal beam divergence and wide field-of-view

Moshe Zadka, You-Chia Chang, Aseema Mohanty, Christopher T. Phare, Samantha P. Roberts, Michal Lipson*

*Corresponding author for this work

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Current silicon photonics phased arrays based on waveguide gratings enable beam steering with no moving parts. However, they su er from a trade-o between beam divergence and field of view. Here, we show a platform based on silicon-nitride/silicon that achieves simultaneously minimal beam divergence and maximum field of view while maintaining performance that is robust to fabrication variations. In addition, in order to maximize the emission from the entire length of the grating, we design the grating’s strength by varying its duty cycle (apodization) to emit uniformly. We fabricate a millimeter long grating emitter with di raction-limited beam divergence of 0.089°.

Original languageEnglish
Pages (from-to)2528-2534
Number of pages7
JournalOptics Express
Volume26
Issue number3
DOIs
StatePublished - 5 Feb 2018

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