A kind of high bandwidth bending resistance multimode fibre

摘要

The present invention relates to a kind of high bandwidth bending resistance multimode fibres, it include sandwich layer and covering, core refractive rate section is parabolic, profile exponent is α, it is characterised in that the core radius R1 is 23~27 μm, and sandwich layer centre bit maximum relative refractive index difference Δ 1max is 0.9%~1.2%, the sandwich layer is the silica glass layer that germanium fluorine is co-doped with, sandwich layer centre bit has minimum Fluorin doped amount, and fluorine content mass percent is CFmin,The fluorine content mass percent of sandwich layer changes with radius, and is distributed by function, and the covering is followed successively by inner cladding from inside to outside, sink covering and surrounding layer. While bandwidth performance improves, bandwidth-wavelength sensitivity reduces the present invention; It can not only be compatible with existing OM3/OM4 multimode fibres, moreover it is possible to support the wavelength-division multiplex technique in 850nm~950nm wave-length coverages, promote optical fiber transmission capacity effectively; Optical fiber of the present invention has excellent bending resistance, is applicable to access net and minimizes in optical device.