Abstract
ABSTRACTIn this work, two kinds of GeS2–Ga2S3–CsI chalcogenide glasses had been fabricated in conventional meltquenching method, and these glasses express excellent transmittance (0.52–10.5 µm), low refractive index difference, high Raman gain and good thermal stability against crystallization. We designed a highly nonlinear step-index fibre consisting of a 72GeS2–18Ga2S3–10CsI core and a 73GeS2–15Ga2S3–12CsI cladding with the zero dispersion wavelength in near-infrared (<1 µm), and theoretically analysed the optical and nonlinear characteristics of this fibre in detail. Substantial simulation results revealed that wide ultra-flat supercontinuum broadening from the visible to the mid-infrared range can be achieved by pumping this fibre at 1064 nm.
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