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Multi-layer silicon nitride-on-silicon polarization-independent grating couplers
2018
Optics Express
Preserved Fulltext
A polarization-independent grating coupler is proposed and demonstrated in a 3-layer silicon nitride-on-silicon photonic platform. Polarization independent coupling was made possible by the supermodes and added degrees of geometric freedom unique to the 3-layer photonic platform. The grating was designed via optimization algorithms, and the simulated peak coupling efficiency was -2.1 dB with a 1 dB polarization dependent loss (PDL) bandwidth of 69 nm. The fabricated grating couplers had a peak
doi:10.1364/oe.26.030623
fatcat:n22wkxxo4zh7rgn3llotitpuua