Fig. 1. Schematic of cross-section and calculated optical field of As₂S₃ photonic crystal fiber

Fig. 2. Cross section image of As₂S₃ photonic crystal fibre

Fig. 3. Cross section image of As₂S₃ glass photonic crystal fibre

Fig. 4. Schematic of experimental setup of fibre tapering method using flame torch

Fig. 5. Schematic of experimental setup of CO₂ laser tapering method

Fig. 6. Optical transmission spetrum in mid-infrared region of As₂S₃ photonic crystal fiber with different tapered diameters

Fig. 7. Experimental setup for measuring supercontinuum output of tapered As₂S₃ photonic crystal fiber

Fig. 8. Measured supercontinuum output of tapered As₂S₃ photonic crystal fiber at different input pump power

Fig. 9. Dispersion analytic curves of As₂S₃ photonic crystal fiber with different tapered diameters

Fig. 10. Supercontinuum evolution in 3 cm-long tapered As₂S₃ photonic crystal fiber

Fig. 11. The comparison between experimental and simulated spectra