We present a study of ultrafast solitonic all-optical switching in the C-band using dual-core
optical fibers fabricated in-house. The two soft glasses used for the fiber express high
contrast of refractive index at the level of 0.4. The core was made of a highly nonlinear lead-
silicate glass, which, combined with the anomalous dispersion, allowed the solitonic
propagation at low pulse energies. A convincing switching performance was demonstrated
using the optimized fiber at hundreds of picojoule level of the in-coupled energy. The …