| 发明名称 |
Few mode optical fibers |
| 摘要 |
A few mode optical fiber comprising:
a Ge-free core having an effective area Aeff of LP01 mode wherein 120 μm2<Aeff<1000 μm2 at 1550 nm, and a refractive index profile selected such that the core is capable of supporting the propagation and transmission of an optical signal with X number of LP modes at 1550 nm, X is an integer and 1<X≦20, maximum refractive index delta of the core, Δ0, wherein −0.5%≦Δ0≦0.08%; and,an annular cladding surrounding the core having a low index ring with a minimum refractive index delta ΔrMIN, ΔrMIN<Δ0 and ΔrMIN≦−0.3 relative to pure SiO2, an outer cladding with a refractive index delta ΔOuter-Clad, such that ΔOuter-Clad>ΔrMIN; and |Δ0−ΔOuter-Clad|>0.05%, the relative refractive index profile of the optical fiber is selected to provide attenuation of <0.18 dB/km at the 1550 nm, and LP11 cut off wavelength >1600 nm. |
| 申请公布号 |
US8971682(B2) |
申请公布日期 |
2015.03.03 |
| 申请号 |
US201313775953 |
申请日期 |
2013.02.25 |
| 申请人 |
Corning Incorporated |
发明人 |
Evans Alan Frank;Korolev Andrey Evgenievich;Kuksenkov Dmitri Vladislavovich;Mishra Snigdharaj Kumar;Nazarov Vladimir Nikolaevich;Wood William Allan |
| 分类号 |
G02B6/028;G02B6/00;G02B6/036 |
主分类号 |
G02B6/028 |
| 代理机构 |
|
代理人 |
Short Svetlana |
| 主权项 |
1. A few mode n optical fiber comprising:
a. a Ge-free core having an effective area Aeff of LP01 mode such that 120 μm2<Aeff<1000 μm2 at 1550 nm, and a refractive index profile selected such that (a) the core is capable of supporting the propagation and transmission of an optical signal with X number of LP modes at a wavelength of 1550 nm, wherein X is an integer greater than 1 and not greater than 20, and (b) maximum refractive index delta of the core, Δ0 in % measured relative to pure SiO2, wherein −0.5%≦Δ0≦0.08%; and b. an annular cladding surrounding the core, said annular cladding having a low index ring with a minimum refractive index delta ΔrMIN, where (a) ΔrMIN<Δ0 and (b) ΔrMIN≦−0.3 measured relative to pure SiO2, and an outer cladding with a refractive index delta ΔOuter-Clad relative to pure silica, such that ΔOuter-Clad>ΔrMIN; and the difference between the relative refractive index of the core Δ0 and the outer cladding ΔOuter-Clad is |Δ0−ΔOuter-Clad|>0.05%, and
wherein the relative refractive index profile of the few mode optical fiber is selected to provide attenuation of less than 0.18 dB/km at the 1550 nm wavelength, and LP11 cut off wavelength is greater than 1600 nm. |
| 地址 |
Corning NY US |
