Supercontinuum generation in germanium-doped fibers and comparison with microstructured fibers

This paper studies the supercontinuum generation in germanium-doped silica fibers (highly nonlinear dispersion shifted fiber) as compared with microstructured fibers. Numerical simulations were performed and it was found that the physical effects responsible for continuum generation are soliton formation, self-frequency shifting, time-delayed Raman and four-wave mixing that exists in both structures in the 800 and 1550 nm range. It is therefore concluded that highly nonlinear fibers has the potential for extreme supercontinuum generation as the microstructured fibers.