Mid-infrared supercontinuum generation from 1.6 to > 11 μm using concatenated step-index fluoride and chalcogenide fibers

We demonstrate an all-fiber supercontinuum source that generates a continuous spectrum from 1.6 mu m to > 11 mu m with 417 mW on-time average power at 33% duty cycle. By utilizing a master oscillator power amplifier pump with three amplification stages and concatenating solid core ZBLAN, arsenic sulfide, and arsenic selenide fibers, we shift 1550 nm light to similar to 4.5 mu m, similar to 6.5 mu m, and > 11 mu m, respectively. With 69 mW past 7.5 mu m, this source provides both high power and broad spectral expansion, while outputting a single fundamental mode. (c) 2018 Optical Society of America