Optics Letters 2017-07-11

Broadband etching-free metal grating couplers embedded in titanium dioxide waveguides

Manon Lamy, Kamal Hammani, Juan Arocas, Christophe Finot, and Jean-Claude Weeber

Index: 10.1364/OL.42.002778

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Abstract

Metal grating couplers embedded into a titanium dioxide layer are proposed. A coupling efficiency better than 20% is experimentally demonstrated with a 3 dB bandwidth of 86 nm which is in agreement with simulation results. This allowed us to perform error-free transmissions of 10 Gbit/s wavelength multiplexed signals in the C-band.

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