Fabrication of a chalcogenide graded index fiber showing flat normal dispersion for Mid-IR supercontinuum generation

Chalcogenide fibers are known for their large transparency window and their high nonlinear optical properties. Indeed, they can be transparent from the visible region up to the mid-infrared (mid-IR) until 12 µm..For these reasons, chalcogenide glass fibers are well suited for generating mid-IR supercontinuum source. The management of dispersion profile is of fundamental importance for supercontinuum generation. In order to address this problem, we have developed for the first-time chalcogenide graded index fibers with a nanostructured core composed by two different glass compositions