Multiple Mode Couplings in a Waveguide Array for Broadband Near-Zero Dispersion and Supercontinuum Generation

Saleha Fatema, Md Borhan Mia, Sangsik Kim

Research output: Contribution to journalArticlepeer-review

Abstract

We achieve a broadband near-zero dispersion in a thin silicon nitride waveguide array at near-infrared utilizing the multiple mode couplings. Different orders of modes are coupled at four different wavelengths, generating eight zero dispersion wavelengths (ZDWs). The broadband near-zero dispersion profile within 90 ps/nm/km is achieved, spanning over the spectral range of 1350$-$1900 nm. Using the dispersion engineered waveguide array, an octave-spanning supercontinuum is numerically generated with a pump of 100 fs and 200 pJ. The concept of using multiple mode couplings to obtain broadband near-zero dispersion can be applied to other spectral regimes and material platforms as well, by engineering the structural parameters to shift the positions of the ZDWs.

Original languageEnglish
Article number9205263
Pages (from-to)216-222
Number of pages7
JournalJournal of Lightwave Technology
Volume39
Issue number1
DOIs
StatePublished - Jan 1 2021

Keywords

  • Dispersion engineering
  • integrated optics
  • supercontinuum

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