On-Chip Phase-Shift Induced Control of Supercontinuum Generation in a Dual-Core Si${}_3$N${}_4$ Waveguide

Abstract

We investigate on-chip spectral control of supercontinuum generation, taking advantage of the additional spatial degree of freedom in strongly-coupled dual-core waveguides. Using numerical integration of the multi-mode generalized nonlinear Schrödinger equation, we show that, with proper waveguide cross-section design, selective excitation of supermodes can vary the dispersion to its extremes, i.e., all-normal or anomalous dispersion can be selected via phase shifting in a Mach-Zehnder input circuit. The resulting control allows to provide vastly different supercontinuum spectra with the same waveguide circuit.

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Cited by in corpus (2)

• Physical mode analysis of multimode cascaded nonlinear processes in strongly-coupled waveguides
• Blue-shifted dispersive waves and broadband UV emission using dual-core SiN waveguides