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A Low Power PWM Optical Phased Array Transmitter with 16° Field-of-View and 0.8° Beamwidth

Fatemi, Reza and Khachaturian, Aroutin and Hajimiri, Ali (2018) A Low Power PWM Optical Phased Array Transmitter with 16° Field-of-View and 0.8° Beamwidth. In: 2018 IEEE Radio Frequency Integrated Circuits Symposium (RFIC). IEEE , Piscataway, NJ, pp. 28-31. ISBN 9781538645451. https://resolver.caltech.edu/CaltechAUTHORS:20200103-130516403

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Abstract

An optical phased array (OPA) transmitter system with a high-swing electrical PWM driver achieving the highest reported grating-lobe-free field-of-view to beamwidth ratio of 16°/0.8° for a two-dimensional aperture is presented. This ratio translates to 400 resolvable spots-which is 30x more numerous than the state-of-the-art. This scalable OPA, with a sparsely populated aperture, overcomes optical routing difficulties in planar photonic processes while maintaining the desired transmitter beam characteristics. To reduce the power consumption, a row-column electrical connection grid for the 144 optical phase shifters decreases the number of electrical drivers from 144 to 37. The PWM driver chip incorporates a breakdown-voltage multiplying architecture to increase the output voltage swing. The 65nm CMOS electronic driver chip and the photonic chip, fabricated through a standard silicon photonics process, occupy 1.7mm² and 2.08mm² of active area respectively.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1109/rfic.2018.8428847DOIArticle
ORCID:
AuthorORCID
Fatemi, Reza0000-0001-9081-2608
Khachaturian, Aroutin0000-0001-8304-3302
Hajimiri, Ali0000-0001-6736-8019
Additional Information:© 2018 IEEE.
Subject Keywords:Phased array, photonic integrated circuits, silicon photonics, free-space optical communication
Record Number:CaltechAUTHORS:20200103-130516403
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200103-130516403
Official Citation:R. Fatemi, A. Khachaturian and A. Hajimiri, "A Low Power PWM Optical Phased Array Transmitter with 16° Field-of-View and 0.8° Beamwidth," 2018 IEEE Radio Frequency Integrated Circuits Symposium (RFIC), Philadelphia, PA, 2018, pp. 28-31. doi: 10.1109/RFIC.2018.8428847
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100505
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:05 Jan 2020 00:02
Last Modified:05 Jan 2020 00:02

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