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Proceedings Paper

Broadband SOI grating coupler based on sub-wavelength gratings with low back reflection for fiber-to-chip coupling of DWDM signals
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Paper Abstract

A design of a broadband and high-efficiency SOI grating coupler (GC) for the TE mode is demonstrated. The periodic segments of the GC use Subwavelength Gratings (SWGC), where the width of the silicon segments is much smaller than the operating wavelengths and the width varies along the length of the GC. The SWGC is optimized for TE polarization with a peak CE of–4.5 dB at a wavelength of 1550 nm, with a 1-dB bandwidth of 68 nm ranging from 1521.4 nm to 1589.4 nm and a 3-dB bandwidth of 119 nm from 1497.4 nm to 1616.4nm. The back reflections in the SWGC are suppressed to - 22 dB. The broadband SWGC is integrated with cascaded ring resonators to demultiplex the incoming DWDM signal into individual channels and distribute them into sub-circuits. A layout of the GCs and ring resonators is generated, and systemlevel performance is evaluated.

Paper Details

Date Published: 4 March 2019
PDF: 6 pages
Proc. SPIE 10921, Integrated Optics: Devices, Materials, and Technologies XXIII, 1092129 (4 March 2019); doi: 10.1117/12.2510384
Show Author Affiliations
Neha Purwaha, Carleton Univ. (Canada)
Cem Bonfil, Optiwave Systems Inc. (Canada)
Ahmad Atieh, Optiwave Systems Inc. (Canada)
Sahar Sargheini, Optiwave Systems Inc. (Canada)
Winnie N. Ye, Carleton Univ. (Canada)

Published in SPIE Proceedings Vol. 10921:
Integrated Optics: Devices, Materials, and Technologies XXIII
Sonia M. García-Blanco; Pavel Cheben, Editor(s)

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