High-efficiency broadband grating out-coupler for thick silicon waveguides with a tuned SiGe layer

We design a novel grating out-coupler while maintaining a Gaussian-shaped far-field output. The approach is based on the patterning of a grating in a SiGe layer on the top surface of a 3-μm-thick Si waveguide. The grating aims at coupling the guided signal into a beam vertically out from the surface...

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Bibliographic Details

Published in:	Journal of the European Optical Society-Rapid Publications
Main Authors:	Muntaha Sidra Tul, Doughan Isaac, Cherchi Matteo, Roussey Matthieu, Aalto Timo
Format:	Article
Language:	English
Published:	EDP Sciences 2025-01-01
Subjects:	silicon germanium grating out-coupler long device broad-band lidar applications
Online Access:	https://jeos.edpsciences.org/articles/jeos/full_html/2025/02/jeos20250032/jeos20250032.html