End-fire silicon optical phased array with half-wavelength spacing

End-fire silicon optical phased array with half-wavelength spacing

We demonstrate an optical phased array with emitting elements spaced at half the operational wavelength. The device is a one-dimensional array fabricated on an integrated silicon platform for operation at a wavelength of 1.55 μm. Light is emitted end-fire from the chip edge where the waveguides are...

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Bibliographic Details
Main Authors: Michael R. Kossey, Charbel Rizk, Amy C. Foster
Format: Article
Language:English
Published: AIP Publishing LLC 2018-01-01
Series:APL Photonics
Online Access:http://dx.doi.org/10.1063/1.5000741
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spelling doaj-df208438dae64cd4855edb4020ee209d2020-11-24T23:39:16ZengAIP Publishing LLCAPL Photonics2378-09672018-01-0131011301011301-610.1063/1.5000741004712APPEnd-fire silicon optical phased array with half-wavelength spacingMichael R. Kossey0Charbel Rizk1Amy C. Foster2Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USADepartment of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USADepartment of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USAWe demonstrate an optical phased array with emitting elements spaced at half the operational wavelength. The device is a one-dimensional array fabricated on an integrated silicon platform for operation at a wavelength of 1.55 μm. Light is emitted end-fire from the chip edge where the waveguides are terminated. The innovative design and high confinement afforded by the silicon waveguides enables λ/2 spacing (775-nm pitch) at the output thereby eliminating grating lobes and maximizing the power in the main lobe. Steering is achieved by inducing a phase shift between the waveguide feeds via integrated thermo-optic heaters. The device forms a beam with a full-width half-maximum angular width of 17°, and we demonstrate beam steering over a 64° range limited only by the element factor.http://dx.doi.org/10.1063/1.5000741
collection DOAJ
language English
format Article
sources DOAJ
author Michael R. Kossey
Charbel Rizk
Amy C. Foster
spellingShingle Michael R. Kossey
Charbel Rizk
Amy C. Foster
End-fire silicon optical phased array with half-wavelength spacing
APL Photonics
author_facet Michael R. Kossey
Charbel Rizk
Amy C. Foster
author_sort Michael R. Kossey
title End-fire silicon optical phased array with half-wavelength spacing
title_short End-fire silicon optical phased array with half-wavelength spacing
title_full End-fire silicon optical phased array with half-wavelength spacing
title_fullStr End-fire silicon optical phased array with half-wavelength spacing
title_full_unstemmed End-fire silicon optical phased array with half-wavelength spacing
title_sort end-fire silicon optical phased array with half-wavelength spacing
publisher AIP Publishing LLC
series APL Photonics
issn 2378-0967
publishDate 2018-01-01
description We demonstrate an optical phased array with emitting elements spaced at half the operational wavelength. The device is a one-dimensional array fabricated on an integrated silicon platform for operation at a wavelength of 1.55 μm. Light is emitted end-fire from the chip edge where the waveguides are terminated. The innovative design and high confinement afforded by the silicon waveguides enables λ/2 spacing (775-nm pitch) at the output thereby eliminating grating lobes and maximizing the power in the main lobe. Steering is achieved by inducing a phase shift between the waveguide feeds via integrated thermo-optic heaters. The device forms a beam with a full-width half-maximum angular width of 17°, and we demonstrate beam steering over a 64° range limited only by the element factor.
url http://dx.doi.org/10.1063/1.5000741
work_keys_str_mv AT michaelrkossey endfiresiliconopticalphasedarraywithhalfwavelengthspacing
AT charbelrizk endfiresiliconopticalphasedarraywithhalfwavelengthspacing
AT amycfoster endfiresiliconopticalphasedarraywithhalfwavelengthspacing
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