On-chip octave-spanning flat supercontinuum in all-normal-dispersion silicon nitride waveguides

Kexin Ren; Yushuo Guo; Yuke Zhai; Lin Zhang

doi:10.1117/12.2657001

27 December 2022 On-chip octave-spanning flat supercontinuum in all-normal-dispersion silicon nitride waveguides

Kexin Ren, Yushuo Guo, Yuke Zhai, Lin Zhang

Proceedings Volume 12504, International Symposium on Silicon-based Optoelectronics (ISSBO 2022); 1250409 (2022) https://doi.org/10.1117/12.2657001
Event: International Symposium on Silicon-based Optoelectronics (ISSBO 2022), 2022, Hangzou, China

Abstract

On-chip supercontinuum generation has attracted a great deal of attention in recent years. Among silicon-based materials, silicon nitride represents an attractive solution for on-chip supercontinuum generation due to its wide transparency window, relatively high Kerr nonlinearity, and negligible two-photon absorption. In this paper, we achieve a flat allnormal dispersion profile in the silicon nitride platform, with a flat dispersion from 600 nm to 2760 nm. Using the proposed waveguide, an ultra-flat (-6 dB) high-coherent octave-spanning supercontinuum covering from 638 nm to 1477 nm can be generated by launching a 250-fs 30-kW input pulse centered at 960 nm. The proposed supercontinuum is of great importance for achieving high-resolution optical coherence tomography and fully stabilized frequency comb sources.

Citation Download Citation

Kexin Ren, Yushuo Guo, Yuke Zhai, and Lin Zhang "On-chip octave-spanning flat supercontinuum in all-normal-dispersion silicon nitride waveguides", Proc. SPIE 12504, International Symposium on Silicon-based Optoelectronics (ISSBO 2022), 1250409 (27 December 2022); https://doi.org/10.1117/12.2657001

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