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High-efficiency diffraction grating coupler for multimode optical interconnect

Abstract : The device presented in this paper is designed for coupling a free space optical wave under quasi-normal incidence in and out of a highly multimode waveguide with high efficiency. It uses two resonant diffraction gratings at the substrate-waveguide interface that are made of a shallow metal grating, covered with a high refractive index layer. It is shown that the resonant structure can theoretically diffract up to 90% of the incident energy in and out of the waveguiding layer. The geometrical parameters of the structure and the tolerances can easily be achieved by conventional technology means.
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Contributor : Nathalie Destouches Connect in order to contact the contributor
Submitted on : Friday, January 5, 2007 - 4:37:14 PM
Last modification on : Saturday, June 25, 2022 - 10:49:47 AM

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J. Franc, N. Destouches, D. Blanc-Pélissier, J.-C. Pommier, S. Tonchev, et al.. High-efficiency diffraction grating coupler for multimode optical interconnect. Photonics Europe, Apr 2006, France. pp.61851F, ⟨10.1117/12.666710⟩. ⟨ujm-00122929⟩



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