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A 1-D heterodyne lens-free optical phased array camera with reference phase shifting

Abiri, Behrooz and Fatemi, Reza and Hajimiri, Ali (2018) A 1-D heterodyne lens-free optical phased array camera with reference phase shifting. IEEE Photonics Journal, 10 (5). Art. No. 6601712. ISSN 1943-0655. doi:10.1109/JPHOT.2018.2871823.

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This paper presents the first integrated silicon photonics optical phased array (OPA) receiver with imaging capabilities. A 32-element 1D OPA with an overall aperture size of 96x50 μm^2 is used to generate an electrically steerable “gazing beam”. The OPA receiver elements couple the incident light to on-chip waveguides which is processed as a phased array receiver. To minimize signal loss and enhance sensitivity, a heterodyne architecture with phase shifters in the local reference path is utilized. The OPA receiver can provide fully programmable angular selectivity with a grating-lobe-free field-of-view of 30° and a gazing beamwidth of 0.74°.

Item Type:Article
Related URLs:
URLURL TypeDescription
Abiri, Behrooz0000-0002-3317-2752
Fatemi, Reza0000-0001-9081-2608
Hajimiri, Ali0000-0001-6736-8019
Additional Information:© 2018 IEEE. IEEE Open Access. Manuscript received July 6, 2018; revised September 17, 2018; accepted September 17, 2018. Date of publication September 26, 2018; date of current version October 12, 2018. This research was supported by Caltech Innovation Initiative. This paper was presented in part at the National Science Foundation, Alexandria, VA, USA. The authors would like to thank OpSIS and Drs. T. Baehr-Jones and M. Hochberg for assistance with chip fabrication and Aroutin Khachaturian for help in measurement setup preparation.
Funding AgencyGrant Number
Caltech Innovation Initiative (CI2)UNSPECIFIED
Subject Keywords:Silicon nanophotonics, Integrated Photonic Systems, Imaging systems,Nano-antennas, Applications
Issue or Number:5
Record Number:CaltechAUTHORS:20180927-080601652
Persistent URL:
Official Citation:B. Abiri, R. Fatemi and A. Hajimiri, "A 1-D Heterodyne Lens-Free Optical Phased Array Camera With Reference Phase Shifting," in IEEE Photonics Journal, vol. 10, no. 5, pp. 1-12, Oct. 2018, Art no. 6601712. doi: 10.1109/JPHOT.2018.2871823
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89986
Deposited By: Tony Diaz
Deposited On:27 Sep 2018 16:01
Last Modified:16 Nov 2021 00:40

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