Fig. 1. Diagram of extrusion processes. (a)~(c) First extrusion; (d)~(e) second extrusion

Fig. 2. DSC curves of As40Se58Te2 and As40Se60 glasses

Fig. 3. Infrared transmission spectra of As40Se58Te2 and As40Se60 glass samples

Fig. 4. Glass refractive index and numerical aperture of As40Se58Te2 and As40Se60 glasses

Fig. 5. (a) Fiber cross-section of As40Se58Te2/As40Se60 fiber; (b) light spot figure of As40Se58Te2/As40Se60 fiber

Fig. 6. Attenuation spectra of As40Se58Te2/As40Se60 step-index structure fiber

Fig. 7. Simulated dispersion curves of As40Se58Te2/As40Se60 fiber (FM is the base mode dispersion, material is the material dispersion)

Fig. 8. SC spectra generation in fiber with different pump wavelengths