| 摘要 |
An anti-resonant hollow-core optical fibre comprising a first tubular cladding element, 1, defining an internal cladding surface, 3, a plurality of second tubular elements, 5, which are attached to the cladding surface and together define a core, 9, with an effective radius, R, and a plurality of third tubular elements, 7, each nested within a respective one of the second tubular elements. There is also a spacing, d, between each of the adjacent second tubular elements. The second tubular elements may be arranged symmetrically. The first or second tubular elements could have circular cross sections. Optionally, the second tubular elements may be elliptical or oval (figure 18). The tubular elements may be formed of glass or silica. The glass may have a refractive index of at least 1.4. The fiber may exhibit an effective single mode. There may be a plurality of fourth tubular elements each nested within the third tubular elements (15, figure 22). |
