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On-chip unidirectional dual-band fiber-chip grating coupler in silicon nitride

Nambiar, S and Muthuganesan, H and Sharma, T and Selvaraja, SK (2018) On-chip unidirectional dual-band fiber-chip grating coupler in silicon nitride. In: OSA Continuum, 1 (3). pp. 864-871.

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Official URL: https://doi.org/10.1364/OSAC.1.000864


We report, for the first time, a single state polarization (TE) dual-band grating fiber-chip coupler on a 700 nm thick silicon nitride platform that couples to both O and C band channels. Dual-band coupling with a single grating coupler is achieved using cross mode k-space equalization. By phase matching the first-order vertical TE01 mode and the fundamental TE00 mode in two distinct bands, we observe simultaneous co-directional dual-band coupling to a single waveguide. Experimental peak efficiency per coupler is measured to be -7.3 dB in the O-band and -8.2 dB in the C-band and the combined 1 dB bandwidth is observed to be 82 nm.

Item Type: Journal Article
Publication: OSA Continuum
Publisher: The Optical Society
Additional Information: The copyright for this article belongs to the Authors.
Department/Centre: Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 23 Aug 2022 10:56
Last Modified: 23 Aug 2022 10:56
URI: https://eprints.iisc.ac.in/id/eprint/76215

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