On-Chip Phase-Shift Induced Control of Supercontinuum Generation in a Dual-Core Si$\mathbf{_{3}}$N$\mathbf{_{4}}$ Waveguide

Lisi Xia, Peter J. M. van der Slot, Maximilian Timmerkamp, Bert Bastiaens, Carsten Fallnich, Klaus J. Boller

Research output: Working paperPreprintAcademic

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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 Schr\"odinger 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.
Original languageEnglish
DOIs
Publication statusPublished - 8 Jul 2023

Keywords

  • physics.optics

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