Mid-IR supercontinua in dispersion-engineered As2S3-silica nanospike waveguides pumped by fs pulses at 2.8 μm

We report generation of coherent octave-spanning mid-infrared supercontinua in As2S3-silica waveguides pumped by a custom-built 2.8 μm femtosecond fiber laser. The fabricated hybrid waveguides are demonstrated to be long-term stable and water-resistant.