Hollow-core-like optical fiber containing nano-core structure and preparation method of hollow-core-like optical fiber

The invention provides a hollow-core-like optical fiber containing a nano-core structure and a preparation method of the hollow-core-like optical fiber, and belongs to the technical field of optical fibers. The optical fiber comprises a nanometer wire core, a supporting layer and a cladding ring which are sequentially arranged from inside to outside in the radial direction, and the nanometer wire core is located in the center of the optical fiber. The supporting layer comprises a plurality of layers of hollow-core capillary tubes which are arranged in the radial direction and are in contact with one another; or the supporting layer comprises a plurality of bearing bush supporting sheets connected between the nano wire core and the cladding ring. And according to different supporting layers, the initial cladding ring is sleeved with the supporting layers in the axial direction, then the supporting layers are blown and stretched in the axial direction, and the composite material is obtained. According to the ho