Ultrabroad supercontinuum generated from a highly nonlinear Ge-Sb-Se fiber.

Optics letters

PubMedID: 27420495

Ou H, Dai S, Zhang P, Liu Z, Wang X, Chen F, Xu H, Luo B, Huang Y, Wang R. Ultrabroad supercontinuum generated from a highly nonlinear Ge-Sb-Se fiber. Opt Lett. 2016;41(14):3201-4.
We report the fabrication of a novel high nonlinear fiber made of Ge-Sb-Se chalcogenide glasses with high numerical aperture (~1. 0), where the core and the cladding glasses consist of Ge15Sb25Se60 and Ge15Sb20Se65 (mol. %), respectively. The nonlinear refractive index (n2) of the core glass is 19×10-18??m2/W at 1. 55 µm, and its laser-induced damage threshold under irradiation of 3. 0 µm fs laser is approximately 3674??GW/cm2. By pumping a 20-cm-long fiber with a core diameter of 23 µm using 150 fs pulses at 6. 0 µm, supercontinuum spanning from ~1. 8 to ~14??µm was generated.