Fig. 1. Design concept of composite hollow core anti-resonant optical fiber

Fig. 2. (a) Structure diagram of hollow core anti-resonant fiber; (b) Back and forth path of light in silica wall

Fig. 3. Schematic diagram of structural parameters for composite material hollow core anti-resonant optical fiber

Fig. 4. The loss spectrum of composite material hollow core anti-resonant fibers

Fig. 5. Schematicdiagram of structural parameters for composite optical fiber

Fig. 6. (a) Overlap degree of silica cladding mode field; (b) The degree of overlap of the mode field of the sedimentary layer with different proportions of cladding materials

Fig. 7. (a) Absorption loss; (b) Transmission loss with different proportions of cladding materials

Fig. 8. Mid-infrared optical material absorption loss

Fig. 9. Composite fiber materials of different sedimentary layers. (a) Mode field overlap of silica layers; (b) Mode field overlap of sedimentary layers; (c) Absorption loss; (d) Transmission loss