Silicon photonic mode multiplexers based on subwavelength metamaterials and on-chip beam forming
D. González-Andrade (Université Paris-Saclay, Paris)
R. Fernández de Cabo (Instituto de Óptica Daza de Valdés (CSIC))
J. Vilas (Alcyon Photonics S.L., Madrid)
T. T.D. Dinh (Université Paris-Saclay, Paris)
J. M. Luque-González (Universidad de Málaga)
D. Oser (TU Delft - QN/Groeblacher Lab, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)
G. Aubin (Université Paris-Saclay, Paris)
F. Amar (Université Paris-Saclay, Paris)
A. Dias (Alcyon Photonics S.L., Madrid)
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Abstract
Integration of photonic circuits on silicon offers a unique opportunity to address the scaling of inter- and intra-chip communications in an energy-efficient and cost-effective manner. Mode-division multiplexing (MDM) is deemed as one of the most promising technologies to increase aggregated data bandwidth and avoid a communication capacity crunch. In this invited talk, we review our latest advances on integrated silicon mode multiplexers, including new topologies based on subwavelength grating (SWG) metamaterials for extended broadband operation and higher-order mode support. Specifically, we report on an ultra-broadband multiplexer based on a phase shifter and a multimode interference (MMI) coupler both engineered with subwavelength metamaterials. Experimental measurements of a complete multiplexer-demultiplexer link show losses lower than 2 dB and crosstalk below -17 dB over a bandwidth of 245 nm (1427 – 1672 nm).