Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 39, Issue 1, Pages 216-222Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2020.3026634
Keywords
Dispersion; Couplings; Silicon nitride; Broadband communication; Bandwidth; Solids; Dispersion engineering; integrated optics; supercontinuum
Funding
- National Science Foundation [ECCS-1930784]
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In this study, a broadband near-zero dispersion was achieved in a thin silicon nitride waveguide array at near-infrared using multiple mode couplings, covering a spectral range of 1350-1900 nm. By engineering the dispersion of the waveguide array, an octave-spanning supercontinuum was numerically generated with a pump of 100 fs and 200 pJ. The concept of obtaining broadband near-zero dispersion through multiple mode couplings can be applied to other spectral regimes and material platforms by adjusting structural parameters to shift the positions of zero dispersion wavelengths.
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.
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