科研之友
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摘要
Tellurium (Te)-based suspended-core fiber (SCF) consisting of dual chalcogenide glasses has been fabricated for the first time using a combined extrusion method. The SCF transmitting ability was evaluated by the simulation of the beam spots, energy distribution and ratio of core/fiber. The fiber was tapered into a small core size of 5 mu m and the corresponding zero-dispersion-wavelength (ZDW) was 4.9 mu m. The nonlinear coefficient gamma was 3.983 m(-1)W(-1) at 5 mu m. Mid-infrared (MIR) supercontinuum (SC) spanning from 1.7 mu m to 11.3 mu m was achieved in a 20 cm Te-based complex SCF, pumped at 5 mu m with an average power of 25 mW. The strong SC generated in the long wavelength was ascribed to the excellent transmitting ability in the SCF.
