Generation of ultra broadband coherent supercontinuum in tapered and dispersion managed silicon nanophotonic waveguides
arXiv:1701.05712 · doi:10.1364/JOSAB.34.001156
Abstract
Tapered and dispersion managed (DM) silicon nanophotonic waveguides are investigated for the generation of optimal ultra broadband supercontinuum (SC). DM waveguides are structures showing a longitudinally dependent group velocity dispersion that results from the variation of the waveguide width with the propagation distance. For the generation of optimal SC, a genetic algorithm has been used to find the best dispersion map. This allows for the generation of highly coherent supercontinuums that span over 1.14 octaves from 1300 nm to 2860 nm and 1.25 octaves from 1200 nm to 2870 nm at -20 dB level for the tapered and DM waveguides respectively, for a 2 m, 200 fs and 6.4 pJ input pulse. The comparison of these two structures with the usually considered optimal fixed width waveguide shows that the SC is broader and flatter in the more elaborated DM waveguide, while the high coherence is ensured by the varying dispersion.
arXiv admin note: substantial text overlap with arXiv:1610.05665
References in corpus (5)
- An octave spanning mid-infrared frequency comb generated in a silicon nanophotonic wire waveguide
- Dispersive wave emission and supercontinuum generation in a silicon wire waveguide pumped around the 1550 nm telecommunication wavelength
- Coherent supercontinuum generation in a silicon photonic wire in the telecommunication wavelength range
- Supercontinuum optimization for dual-soliton based light sources using genetic algorithms in a Grid platform
- Scattering of a cross-polarized linear wave by a soliton at an optical event horizon in a birefringent nanophotonic waveguide