Low-attenuation bending insensitive single mode fiber
A bend-insensitive, single-mode fiber technology, used in clad fibers, multi-layer core/clad fibers, light guides, etc. Attenuation performance, attenuation reduction, cost reduction effect
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[0044] The present invention will be described in further detail below in conjunction with embodiment.
[0045] The bare optical fiber in this embodiment includes a core layer and a cladding layer. The core layer 00 is made of quartz glass doped with fluorine (F) and germanium (Ge), or quartz glass doped with fluorine and other dopants, and is prepared by the PCVD process. ; There are four cladding layers around the core layer. The first inner cladding layer 10 closely surrounds the core layer and is composed of fluorine (F) and germanium (Ge) co-doped quartz glass prepared by PCVD process; the second inner cladding layer 20 closely surrounds the first cladding layer and is a pure quartz glass layer, which is composed of Constructed of high-purity quartz glass liner. The depressed cladding layer 30 closely surrounds the second cladding layer and is composed of fluorine (F) doped quartz glass, whose relative refractive index Δ4 is smaller than that of other cladding layers. ...
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