A single-mode fiber
A single-mode optical fiber and optical fiber technology, applied in the field of optical communication, can solve the problems of realizing complex refractive index profile, insufficient Ge/F co-doping process, high metal impurity content, and dependence on the purity of raw materials, etc. Attenuation, effect of fiber strength increase
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[0033] The present invention will be described in detail below in conjunction with specific embodiments.
[0034] It consists of a core layer 1, a first inner cladding layer 2, a second inner cladding layer 3 and an outer cladding layer 4. The fiber core is composed of silica glass doped with fluorine and other dopants: there are three cladding layers outside the core. The first inner cladding closely surrounds the core layer, and the second inner cladding is composed of fluorine-doped OVD quartz glass; the third cladding is the outer cladding, which closely surrounds all the layers of the second inner cladding, which is made of natural quartz sand by APVD process. Pure silica layer prepared from raw material with a diameter of 125 μm.
[0035] According to the technical scheme of the above-mentioned single-mode optical fiber, the parameters of the optical fiber are designed within the specified range, and the core rod is manufactured according to the design requirements of t...
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