Abstract

We investigate a silicon nitride (Si₃N₄) horizontal slot waveguide with silicon dioxide (SiO₂) cladding, which can achieve a flat and low normal dispersion of −15.56 ps/(nm•km) over a 3270-nm wavelength range from 1170 to 4440 nm, covering a 1.9 octave bandwidth. By launching a 100-fs 90-kW hyperbolic secant input pump pulse, a three-octave supercontinuum (SC) from 504 to 4229 nm can be generated using a 5-mm long waveguide. The generated SC spectrum is highly coherent, as it is mainly expanded by self-phase modulation (SPM) and optical wave breaking (OWB) in all-normal dispersion regime. The degree of coherence can achieve >0.99 from 1250 to 4300 nm. Therefore, the proposed waveguide could potentially serve as a key element in the on-chip broadband source for silicon photonic platform.

Coherent supercontinuum generation in all-normal dispersion Si₃N₄ waveguides

Israel Rebolledo-Salgado, Zhichao Ye, Simon Christensen, Fuchuan Lei, Krishna Twayana, Jochen Schröder, Martin Zelan, and Victor Torres-Company
Opt. Express 30(6) 8641-8651 (2022)

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

Kexin Ren, Yushuo Guo, Yuke Zhai, and Lin Zhang
Opt. Express 32(6) 8527-8536 (2024)

Mid-infrared supercontinuum generation in silicon-germanium all-normal dispersion waveguides

Milan Sinobad, Alberto DellaTorre, Remi Armand, Barry Luther-Davies, Pan Ma, Stephen Madden, Arnan Mitchell, David J. Moss, Jean-Michel Hartmann, Jean-Marc Fedeli, Christelle Monat, and Christian Grillet
Opt. Lett. 45(18) 5008-5011 (2020)

On-chip two-octave supercontinuum generation by enhancing self-steepening of optical pulses

Lin Zhang, Yan Yan, Yang Yue, Qiang Lin, Oskar Painter, Raymond G. Beausoleil, and Alan E. Willner
Opt. Express 19(12) 11584-11590 (2011)

Silicon waveguide with four zero-dispersion wavelengths and its application in on-chip octave-spanning supercontinuum generation

Lin Zhang, Qiang Lin, Yang Yue, Yan Yan, Raymond G. Beausoleil, and Alan E. Willner
Opt. Express 20(2) 1685-1690 (2012)