Fig. 1. Preparation process of the optical fiber preform with a ridged core

Fig. 2. Characteristic curves of Ge₁₂As₂₄Se₆₄ and Ge₁₀As₂₄S₆₆ glasses. (a) Differential scanning calorimetry curves; (b) dispersion curves of linear refractive index

Fig. 3. Relationship between dispersion and core size of ridged core fiber. (a) Schematic of cross section for the ridged core fiber; (b) relationship between dispersion of the fiber and W; (c)(d) relationship between dispersion of the fiber and h

Fig. 4. Cross section and transmission loss of fabricated fiber.(a) (b) Cross section; (c) transmission loss

Fig. 5. Measured SC of 12-cm-long Ge-As-Se/Ge-As-S fiber with a ridged core pumped along TE direction