Fig. 1. Design of structure and dispersion. (a) Cross-sectional structure of four-hole suspended-core fiber; (b) material dispersion and waveguide dispersion

Fig. 2. Zero dispersion points and linear fitting curves of suspended-core and step-index fibers for different core diameters. (a) Dispersion of suspended-core (solid line) and traditional step-index (dashed line) fibers at small core diameters; (b) fitted curves

Fig. 3. Dispersion of fiber under different bridge widths

Fig. 4. End face of four-hole suspended-core fiber

Fig. 5. Optical performance parameters. (a) Refractive index and numerical aperture; (b) T_g

Fig. 6. Transmission loss of As₃₀Se₅₀Te₂₀ cladding-free fiber and single-point laser loss of suspended-core fiber

Fig. 7. Supercontinuum spectra at different pump wavelengths