Flat and broadband Continuum source based on similariton spectrum generated in germanium-doped photonic crystal fiber for DWDM

We investigate the generation of flat and broadband Continuum based on similariton spectrum in germanium-doped photonic crystal fiber via Raman amplification. The proposed fiber is analyzed numerically using vector Finite Element Method (VFEM) with a circular perfectly matched layer (PML). By using 30 mol% of germanium concentration, we obtain ultra-high nonlinearity about 61.71w
^-1
km
^-1
, low confinement loss about 2.42*10
^-8
dB/km and near zero flattened normal chromatic dispersion of -2.55 ps/nm/km from 1450 to 1650nm. The continuum generated into the 3.5-m-long proposed fiber has flat and broadband spectrum of 130 nm and centered at 1550nm. This continuum allows generating at least 100 channels separated by 100 GHz for DWDM.