Dispersion engineered mid-IR supercontinuum generation using multi-core silicon-rich nitride photonic integrated waveguide

The multi-core silicon-rich nitride photonic integrated waveguide is presented here to numerically model the spanning of supercontinuum generation in the mid-IR region beyond the 4 mu m wavelength range by engineering the dispersion profile such that maximum phase-matching can be achieved. Tunable dispersive wave generation has been observed in a long mid-IR region up to 5.2 mu m wavelength by the variation of gap spacing between the cores. This unique geometry enables a higher phase matching from 1.2 mu m to 2.6 mu m wavelength range resulting in the flat dispersion profile in the near-IR region by coupling the fundamental mode in narrow waveguide core to the higher-order mode in wide waveguide core that gives rise to anomalous GVD which plays an essential role in compensating chromatic dispersion in the mid-IR region.

Automated summary

The study focuses on utilizing multi-core silicon-rich nitride photonic integrated waveguides to fill the supercontinuum spectrum in the mid-IR region and generate tunable dispersive waves. By adjusting the gap spacing between cores, the dispersion profile of the waveguide can be engineered to achieve phase-matching within specific wavelength ranges.