Corrugated waveguide-based optical phased array with crosstalk suppression

David Kwong; Amir Hosseini; John Covey; Xiaochuan Xu; Yang Zhang; Swapnajit Chakravarty; Ray T. Chen

doi:10.1109/LPT.2014.2311454

Corrugated waveguide-based optical phased array with crosstalk suppression

David Kwong
, Amir Hosseini
, John Covey
, Xiaochuan Xu
, Yang Zhang
, Swapnajit Chakravarty
, Ray T. Chen

University of Texas at Austin
Omega Optics Inc.

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Abstract

We present the corrugated waveguide as a free space grating coupler for use in optical phased arrays for large angle optical beam steering. Compared with conventional shallow etched gratings, the corrugated waveguide requires only a single patterning step while achieving lithographically defined index contrast. We achieve 15° of steering with wavelength tuning, with an average longitudinal beam width of 0.3°. To prevent optical crosstalk from grating-assisted coupling in a corrugated waveguide array with small element spacing, the photonic bandgap of a 2D photonic crystal is used to optically isolate each array element in a 16 element array.

Original language	English
Article number	6766227
Pages (from-to)	991-994
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	26
Issue number	10
DOIs	https://doi.org/10.1109/LPT.2014.2311454
State	Published - 15 May 2014
Externally published	Yes

Keywords

Optical waveguide
gratings
phased array
photonic crystal
photonic integrated circuit
silicon nanomembrane

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10.1109/LPT.2014.2311454

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title = "Corrugated waveguide-based optical phased array with crosstalk suppression",

abstract = "We present the corrugated waveguide as a free space grating coupler for use in optical phased arrays for large angle optical beam steering. Compared with conventional shallow etched gratings, the corrugated waveguide requires only a single patterning step while achieving lithographically defined index contrast. We achieve 15° of steering with wavelength tuning, with an average longitudinal beam width of 0.3°. To prevent optical crosstalk from grating-assisted coupling in a corrugated waveguide array with small element spacing, the photonic bandgap of a 2D photonic crystal is used to optically isolate each array element in a 16 element array.",

keywords = "Optical waveguide, gratings, phased array, photonic crystal, photonic integrated circuit, silicon nanomembrane",

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AU - Kwong, David

AU - Hosseini, Amir

AU - Covey, John

AU - Xu, Xiaochuan

AU - Zhang, Yang

AU - Chakravarty, Swapnajit

AU - Chen, Ray T.

PY - 2014/5/15

Y1 - 2014/5/15

N2 - We present the corrugated waveguide as a free space grating coupler for use in optical phased arrays for large angle optical beam steering. Compared with conventional shallow etched gratings, the corrugated waveguide requires only a single patterning step while achieving lithographically defined index contrast. We achieve 15° of steering with wavelength tuning, with an average longitudinal beam width of 0.3°. To prevent optical crosstalk from grating-assisted coupling in a corrugated waveguide array with small element spacing, the photonic bandgap of a 2D photonic crystal is used to optically isolate each array element in a 16 element array.

AB - We present the corrugated waveguide as a free space grating coupler for use in optical phased arrays for large angle optical beam steering. Compared with conventional shallow etched gratings, the corrugated waveguide requires only a single patterning step while achieving lithographically defined index contrast. We achieve 15° of steering with wavelength tuning, with an average longitudinal beam width of 0.3°. To prevent optical crosstalk from grating-assisted coupling in a corrugated waveguide array with small element spacing, the photonic bandgap of a 2D photonic crystal is used to optically isolate each array element in a 16 element array.

KW - Optical waveguide

KW - gratings

KW - phased array

KW - photonic crystal

KW - photonic integrated circuit

KW - silicon nanomembrane

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DO - 10.1109/LPT.2014.2311454

M3 - 文章

AN - SCOPUS:84899835489

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SP - 991

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JO - IEEE Photonics Technology Letters

JF - IEEE Photonics Technology Letters

IS - 10

M1 - 6766227

ER -

Corrugated waveguide-based optical phased array with crosstalk suppression

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Keywords

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