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    • 9. 发明申请
    • SINGLE-MODE FIBER AND PRODUCTION METHOD THEREOF
    • 单模光纤及其生产方法
    • US20110058780A1
    • 2011-03-10
    • US12839432
    • 2010-07-20
    • Qingrong HANChen YANGJing LIJie LUO
    • Qingrong HANChen YANGJing LIJie LUO
    • G02B6/028C03B37/014C03B37/018
    • C03B37/018C03B37/01211C03B37/014C03B37/0183C03B2201/08C03B2201/12C03B2201/31C03B2203/23C03B2203/24C23C16/045C23C16/402C23C16/56G02B6/02238G02B6/0283G02B6/0365
    • A single mode fiber having a core, an inner cladding, a depressed cladding, and an outer cladding composed of pure silica glass. The core is surrounded in sequence with the inner cladding and the depressed cladding. The core has silica glass doped with germanium and fluorine, with a diameter (a) of 8.0-8.8 μm, a relative refractive index difference (Δ1) of 0.35-0.38%, and the contribution of fluoride (ΔF) is −0.09±0.02%. The inner cladding has silica glass doped with germanium and fluorine, with a diameter (b) of 18-21 μm and a relative refractive index difference (Δ2) of 0±0.02%. The depressed cladding has silica glass doped with fluorine, with a diameter (c) of 26-36 μm and a relative refractive index difference (Δ32) at the external interface thereof is between −0.22 and −0.35%, and a relative refractive index difference (Δ31) at the internal interface thereof is between −0.20 and −0.35%, and Δ32≦Δ31. The fiber has a good bending resistance, good mechanical properties, and extended service lifetime, and prevents the additional stresses generated by bending from passing on to the core, thereby reducing attenuation.
    • 具有芯,内包层,凹陷包层和由纯二氧化硅玻璃构成的外包层的单模光纤。 芯部与内包层和凹陷包层依次包围。 芯具有掺杂有锗和氟的二氧化硅玻璃,直径(a)为8.0-8.8μm,相对折射率差(&Dgr; 1)为0.35-0.38%,氟化物(&Dgr; F)的贡献为 -0.09±0.02%。 内包层具有掺杂有锗和氟的二氧化硅玻璃,其直径(b)为18-21μm,相对折射率差(&Dgr; 2)为0±0.02%。 凹陷的包层具有掺杂有氟的二氧化硅玻璃,其直径(c)为26-36μm,其外界面处的相对折射率差(&Dgr; 32)在-0.22和-0.35%之间,相对折射率 在其内部界面处的指数差异(&Dgr; 31)在-0.20和-0.35%之间,&Dgr; 32≦̸&Dgr; 31。 纤维具有良好的抗弯曲性,良好的机械性能和延长的使用寿命,并且防止由弯曲产生的附加应力传递到芯上,从而减少衰减。