Everpro Technologies Comp Any Limited

Yangtze Optical Fibre and Cable Joint Stock Limited Company

Yangtze Optical Fibre and Cable Company, Ltd.

Shuqiang Zhang

Song Wang

Jin Xu

Yongtao Liu

Mingfeng Fan

Wei Wang

Jie Luo

Zhipan Zhou

Beibei Cao

Qingrong Han

Yuqing Cao

TieJun Wang

Zhenbao He

Raadj Matai

A graded refractive index bending-resistant multimode optical fiber includes a core layer and claddings. The core layer has a radius in a range of 20-50 &#x3bc;m; refractive indexes being a graded refractive index distribution with a distribution exponent &#x3b1; in a range of 1.89-1.97; and a maximum relative refractive index difference (RRID) &#x394;1% max in a range of 0.9%-2.72%. The claddings has an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the inner cladding. The inner cladding has a radius in a range of 22-57 &#x3bc;m, and an RRID &#x394;2% in a range of &#x2212;0.02%-0.02%. The intermediate cladding is a pure quartz glass layer, and has a radius in a range of 32-60 &#x3bc;m, and an RRID &#x394;3% in a range of &#x2212;0.01%-0.01%.

Graded refractive index bending-resistant multimode optical fiber

A graded refractive index bending-resistant multimode optical fiber includes a core layer and claddings. The core layer has a radius in a range of 22.5-27.5 &#x3bc;m; refractive indexes being a gradient-graded refractive index distribution with a distribution exponent &#x3b1; in a range of 1.99-2.06; and a maximum relative refractive index difference (RRID) &#x394;1% max in a range of 0.9%-1.3%. The claddings has an inner cladding surrounding the core layer, an intermediate cladding surrounding the inner cladding and an outer cladding surrounding the inner cladding. The inner cladding has a radius in a range of 25.5-34.5 &#x3bc;m, and an RRID &#x394;2% in a range of &#x2212;0.02%-0.02%. The intermediate cladding is a pure quartz glass layer, and has a radius in a range of 30.5-49.5 &#x3bc;m, and an RRID &#x394;3% in a range of &#x2212;0.01%-0.01%. The outer cladding has a radius in a range of 61.5-63.5 &#x3bc;m, and an RRID &#x394;4% is in a range of &#x2212;0.20%-0.30%.

Graded refractive index bending-resistant multimode obtical fiber

A dispersion compensation fiber comprises a fiber core and cladding. The fiber core is a core layer mainly doped with germanium and having a positive relative refractive index difference. The cladding covering the fiber core comprises a trench cladding mainly doped with fluorine, an annular cladding mainly doped with germanium, a matching cladding mainly doped with fluorine, and an outermost mechanical cladding in order. Relative refractive index differences of the fiber core and the claddings are respectively: &#x394;1% being 1.55% to 2.20%, &#x394;2% being &#x2212;0.55% to &#x2212;0.30%, &#x394;3% being 0.40% to 0.65%, &#x394;4% being &#x2212;0.20% to &#x2212;0.01%, and &#x394;5% being 0. Radius ranges, from R1 to R5, of the fiber core and the claddings are respectively: R1 being 1.4 to 1.7 &#x3bc;m, R2 being 4.1 to 4.8 &#x3bc;m, R3 being 6.7 to 8.8 &#x3bc;m, R4 being 10 to 17 &#x3bc;m, and R5 being 38 to 63 &#x3bc;m.

Dispersion compensation fiber

A bending-resistant large core diameter high numerical aperture multimode fiber includes a core and a cladding surrounding the core. The core has a radius R1 in a range of 28 to 50 microns, a refractive index profile of a parabola shape with &#x3b1; being in a range of 1.9 to 2.2, and a maximum relative refractive index difference &#x394;1% max being in a range of 1.9% to 2.5%. The cladding includes an inner cladding and/or a trench cladding, and an outer cladding disposed from the inner to the outer in sequence. The radius R2 of the inner cladding is in a range of 28 to 55 microns, and the relative refractive index difference &#x394;2% is &#x2212;0.1% to 0.1%. The radius R3 of the trench cladding is in a range of 28 to 60 microns, and the relative refractive index difference &#x394;3% is in a range of &#x2212;0.15% to &#x2212;0.8%.

Bending-resistant large core diameter high numerical aperture multimode fiber

The invention relates to a low dispersion slope dispersion-shifted single-mode fiber for large capacity transmission comprising a core and a cladding. Said fiber is characterized in that said core has three to five core segments having different refractive index profiles, and said cladding has four to six cladding segments. The total dispersion slope of said fiber at 1550 nm is less than 0.060 ps/nm&#xb7;km, the zero dispersion wavelength is less than 1420 nm, the effective area ranges from 55 &#x3bc;mto 65 &#x3bc;m, and the dispersion in the region of 1530 nm&#x2dc;1565 nm ranges from 5.0 ps/nm&#xb7;km to 12.0 ps/nm&#xb7;km. The fiber has low dispersion slope, moderate dispersion, low attenuation, and excellent bend resistance performance. It is suitable for a high-speed (10 Gbits/s and 40 Gbits/s), large capacity, and long distance DWDM system. Therefore, not only the non-linear problem that fazes high-speed communication is solved effectively, but also the DWDM transmission at 10 Gbits/s can be realized within a wider wavelength range. In addition, low dispersion slope is advantageous for comprehensive management of dispersion, so that the requirement for long distance non-electric relay can be fulfilled.

Dispersion-shifted single-mode fiber having low dispersion slope for large capacity transmission

Growing community of inventors

Hubei, China

Shuqiang Zhang