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2. 发明公开

EP2420876A1 SINGLE-MODE OPTICAL FIBER AND MANUFACTURE METHOD THEREOF 有权转让
标题翻译： EINMODENFASER UND HERSTELLUNGSVERFAHRENDAFÜR
公开(公告)号：EP2420876A1
公开(公告)日：2012-02-22
申请号：EP10737460.5
申请日：2010-02-26
申请人： Yangtze Optical Fibre And Cable Company, Ltd.
发明人： HAN, Qingrong , YANG, Chen , LI, Jing , LUO, Jie
IPC分类号： G02B6/036 , C23C16/44 , C23C16/30 , C03B37/018 , C03B37/027
CPC分类号： C03B37/018 , C03B37/01211 , C03B37/014 , C03B37/0183 , C03B2201/08 , C03B2201/12 , C03B2201/31 , C03B2203/23 , C03B2203/24 , C23C16/045 , C23C16/402 , C23C16/56 , G02B6/02238 , G02B6/0283 , G02B6/0365
摘要： A single mode fiber comprises a core, an inner cladding, a depressed cladding and an outer cladding composed of pure silica glass. The core is composed of silica glass doped with germanium and fluorine, with a diameter (a) of 8.0-8.8 µm, a relative refractive index difference (Δ 1 ) of 0.35-0.38%, and the contribution of fluoride (Δ F ) is -0.09 ± 0.02%. The inner cladding is composed of silica glass doped with germanium and fluorine, with a diameter (b) of 18-21 µm and a relative refractive index difference (Δ 2 ) of 0 ± 0.02%. The depressed cladding is composed of silica glass doped with fluorine, with a diameter (c) of 26-36 µm and a relative refractive index difference (Δ 32 ) at the external interface thereof is between -0.22 and -0.35%, and a relative refractive index difference (Δ 31 ) at the internal interface thereof is between -0.20 and -0.3 5%, and Δ 32 ≤Δ 31 . The fiber is able to improve the fiber bending resistance, prevent the additional stresses generated by fiber bending from passing on to the core for avoiding the increase of attenuation, thereby effectively improving the mechanical properties and service life of the fiber.
摘要翻译：单模光纤包括芯，内包层，凹陷包层和由纯二氧化硅玻璃构成的外包层。核心由掺杂有锗和氟的石英玻璃组成，直径（a）为8.0-8.8μm，相对折射率差（“1”）为0.35-0.38％，氟化物（“F”）的贡献为 -0.09±0.02％。内包层由掺杂有锗和氟的石英玻璃构成，直径（b）为18-21μm，相对折射率差（“2”）为0±0.02％。凹陷的包层由掺杂氟的石英玻璃构成，直径（c）为26-36μm，其外界面处的相对折射率差（“32”）在-0.22和-0.35％之间，相对其内部界面处的折射率差（“31”）在-0.20和-0.3±5％之间，“32‰¤”31。纤维能够提高纤维的抗弯曲性，防止纤维弯曲产生的附加应力传递到纤芯上，以避免增加衰减，从而有效提高纤维的机械性能和使用寿命。

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