WO2016173253A1 - 一种超低衰耗弯曲不敏感单模光纤 - Google Patents

一种超低衰耗弯曲不敏感单模光纤 Download PDF

Info

Publication number
WO2016173253A1
WO2016173253A1 PCT/CN2015/096115 CN2015096115W WO2016173253A1 WO 2016173253 A1 WO2016173253 A1 WO 2016173253A1 CN 2015096115 W CN2015096115 W CN 2015096115W WO 2016173253 A1 WO2016173253 A1 WO 2016173253A1
Authority
WO
WIPO (PCT)
Prior art keywords
fiber
layer
optical fiber
refractive index
radius
Prior art date
Application number
PCT/CN2015/096115
Other languages
English (en)
French (fr)
Inventor
张磊
龙胜亚
朱继红
吴俊�
周红燕
张睿
王瑞春
Original Assignee
长飞光纤光缆股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 长飞光纤光缆股份有限公司 filed Critical 长飞光纤光缆股份有限公司
Priority to EP15890628.9A priority Critical patent/EP3290973A4/en
Priority to KR1020177023831A priority patent/KR102019579B1/ko
Priority to JP2017545942A priority patent/JP6671385B2/ja
Publication of WO2016173253A1 publication Critical patent/WO2016173253A1/zh
Priority to US15/786,048 priority patent/US10018779B2/en

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
    • G02B6/03661—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 4 layers only
    • G02B6/03683—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 4 layers only arranged - - + +
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
    • G02B6/03622—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only
    • G02B6/03633—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only arranged - -
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03694—Multiple layers differing in properties other than the refractive index, e.g. attenuation, diffusion, stress properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02004—Optical fibres with cladding with or without a coating characterised by the core effective area or mode field radius
    • G02B6/02009—Large effective area or mode field radius, e.g. to reduce nonlinear effects in single mode fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
    • G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
    • G02B6/03661—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 4 layers only
    • G02B6/03666—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 4 layers only arranged - + - +

Definitions

  • the present invention relates to an ultra-low-loss bend-insensitive single-mode optical fiber for an optical communication transmission system, which has low attenuation, excellent bending insensitivity, and a mode field diameter compatible with the G.657.A2 standard , belongs to the field of optical communication technology.
  • optical fiber communication Because of its large capacity, long transmission distance, fast transmission speed and economy, optical fiber communication has been widely used in long-distance trunk networks to metropolitan area networks and access networks.
  • the development of optical fiber communication technology has always been aimed at faster transmission rate, larger capacity and longer transmission distance, and continuously improves and improves the performance index of optical fiber and the communication technology of optical fiber.
  • communication networks are beginning to move toward the next generation of sustainable development, and building a fiber infrastructure with huge transmission capacity and distance is the physical basis of the next generation network.
  • the performance indicators of optical fibers which are transmission media of optical fiber communication networks, also need to be further improved.
  • the attenuation coefficient of the fiber is one of the most important performance indicators of the fiber, which largely determines the relay distance of the fiber communication.
  • the smaller the attenuation coefficient of the optical fiber the farther the optical signal carried by it can be transmitted, and the smaller the attenuation amplitude of the optical signal carried by the same transmission distance. Reducing the attenuation coefficient can effectively improve the optical signal-to-noise ratio OSNR in optical fiber communication, and further improve the transmission quality and transmission distance of the system.
  • the optical signal In long-distance fiber-optic communication, the optical signal is transmitted through the relay station. If the attenuation coefficient of the optical fiber is smaller, the farther the transmission distance of the optical signal is, the distance between the relay stations can be increased. Reduce the settings of the relay station and reduce operating costs.
  • G.652 fiber which includes G.657.A fiber compatible with the G.652 standard and G.657.B fiber not compatible with the G.652 standard. . G.657.
  • Class A fiber has good compatibility with G.652.D fiber, and it has better bending resistance than ordinary G.652.D fiber, so it is considered to be the most likely replacement.
  • G.652 fiber One of the products with G.652 fiber. Therefore, a new generation of single-mode fiber compatible with the G.652 standard and having lower attenuation, relatively large mode field diameter and bending insensitivity has become a research hotspot in the field of communication fiber.
  • the following methods can generally be used to reduce fiber attenuation.
  • the use of higher purity raw materials, improve the production environment and equipment sealing performance to reduce the probability of introduction of external impurities, such as the patent CN201110178833.3 is to improve the airtightness of the optical fiber preform deposition process, reducing the introduction of external impurities.
  • the coating process of the bare fiber surface coating is also an important factor affecting the fiber attenuation performance.
  • the laser energy is distributed in a Gaussian distribution in the fiber profile, and the fiber laser energy is about 70%.
  • Partially doped core layer propagation that is, high energy density laser transmission is concentrated in a high concentration doped core layer with a large Rayleigh coefficient. If a reasonable non-Gaussian profile is designed through a reasonable optical section design to reduce the energy loss in the high concentration doped core layer, the attenuation performance of the fiber can be significantly reduced.
  • the core layer is co-doped with a larger amount of Ge/F.
  • the relative refractive index of the core layer is generally greater than 0.35%, that is, The core layer Ge is more doped, thus causing a larger Rayleigh scattering to increase the attenuation of the fiber.
  • Document CN201310394404 proposes an ultra-low-loss fiber design that uses an outer cladding design of pure silica, but because it uses a typical step profile structure, there is no use of a depressed inner cladding design to optimize the bending of the fiber, and The core layer is not doped with Ge, so it may cause viscosity mismatch in the preparation of the preform, so the attenuation and bending levels can be found to be relatively poor.
  • the layer defined as the closest to the axis is the core layer according to the change of the refractive index, and the outermost layer of the fiber, that is, the pure silicon dioxide layer is defined as the outer layer of the fiber.
  • the relative refractive index ⁇ n i of each layer of the fiber is defined by the following equation.
  • n i is the refractive index of the core and n c is the refractive index of the outer cladding, ie the refractive index of pure silica.
  • the relative refractive index contribution ⁇ Ge of the fiber core Ge doping is defined by the following equation.
  • n Ge is a hypothetical core Ge dopant, and in pure silica doped with no other dopants, the absolute refractive index of the silica glass is increased, and n c is the most The refractive index of the outer cladding, that is, the absolute refractive index of pure silica without Ge or F doping.
  • the IEC (International Electrotechnical Commission) standard 60793-1-44 defines: the cable cut-off wavelength ⁇ cc is the wavelength at which the optical signal no longer propagates as a single-mode signal after it has propagated for 22 meters in the fiber. In the test, it is necessary to obtain data by winding a fiber around a circle with a radius of 14 cm and two circles with a radius of 4 cm.
  • the technical problem to be solved by the present invention is to provide an ultra low attenuation bending insensitive single mode fiber having lower fiber manufacturing cost, lower attenuation coefficient and excellent bending performance.
  • the technical solution adopted by the present invention to solve the above-mentioned problems is to include a core layer and a cladding layer, characterized in that the core layer radius r 1 is 3.0-3.9 ⁇ m, and the core layer relative refractive index ⁇ n 1 is -0.04.
  • the inner layer is covered from the inside to the outside in the outer layer, the inner cladding layer is submerged, the outer cladding layer and the outer cladding layer are assisted, and the inner cladding radius r 2 of the optical fiber is 8-14 ⁇ m, and the relative refractive index ⁇ n 2 is - 0.35% ⁇ -0.10%;
  • the depressed inner cladding radius r 3 is 14-20 ⁇ m, the relative refractive index ⁇ n 3 is -0.6% to -0.2%, and the auxiliary outer cladding radius r 4 is 35-50 ⁇ m,
  • the refractive index ⁇ n 4 ranges from -0.4% to -0.15%;
  • the outer cladding is a pure silica glass layer having an outermost diameter of 125 ⁇ m.
  • the core layer is a fluorinated fluorine-doped silica glass layer or only ytterbium-doped silica glass, wherein the doping contribution of cerium is 0.02% to 0.10%, preferably 0.04% to 0.08. %.
  • the mode diameter of the optical fiber at a wavelength of 1310 nm is 8.4 to 9.1 ⁇ m, preferably 8.5 to 8.8 ⁇ m.
  • the cable cut-off wavelength of the optical fiber is equal to or less than 1260 nm.
  • the zero dispersion point of the optical fiber is 1300 to 1324 nm.
  • the zero dispersion slope of the optical fiber is less than or equal to 0.092.
  • the dispersion of the optical fiber at a wavelength of 1310 nm is equal to or less than 18 ps/nm*km, and the dispersion of the optical fiber at a wavelength of 1625 nm is equal to or smaller than 22 ps/nm*km.
  • the attenuation of the optical fiber at a wavelength of 1310 nm is equal to or less than 0.324 dB/km; preferably, it is equal to or less than 0.304 dB/km.
  • the attenuation of the optical fiber at a wavelength of 1550 nm is equal to or less than 0.184 dB/km; preferably, it is equal to or less than 0.174 dB/km.
  • the macrobend loss of the optical fiber at a wavelength of 1550 nm, the bending radius of R15 mm is 10 turns is equal to or less than 0.03 dB, and the macrobend loss of one turn of the bending radius of R10 mm is equal to or less than 0.1 dB.
  • the coating thickness of the optical fiber may be typically 250 microns or 200 microns.
  • the beneficial effects of the invention are as follows: 1. Reasonably designing the cross-sectional structure of the optical fiber core cladding layer and the viscosity matching inside the optical fiber, Reduce the defects in the fiber preparation process and reduce the attenuation parameters of the fiber; 2. Design a reasonable fiber-fluorine-doped sag structure, and make the fiber have an MFD equal to or greater than 8.4 by rationally designing the fiber core cladding profiles; The comprehensive performance parameters such as cutoff wavelength, bending loss and dispersion of the present invention are good in the application band, and the cable cut-off wavelength is small enough to ensure the single-mode state of the optical signal of the optical fiber in the C-band transmission application, and the optical fiber profile is adopted.
  • the layer structure adopts the design of pure silica, which reduces the specific gravity of the fluorine-doped glass in the optical fiber, thereby reducing the manufacturing cost of the optical fiber manufacturing.
  • FIG. 1 is a distribution diagram of a refractive index profile structure according to an embodiment of the present invention.
  • the core layer comprises a core layer and a cladding layer, and the core layer is a fluorinated fluorine-doped silica glass layer or an erbium-doped silica glass layer, and the inner layer is covered with an inner cladding layer and an inner cladding layer from the inside to the outside.
  • the outer cladding is a pure silica glass layer.
  • the outer cladding has a radius of 125 microns.
  • Table 1 lists the refractive index profile parameters of a preferred embodiment of the invention wherein ⁇ Ge is the amount of refractive index contribution of Ge doping in the core layer.
  • Table 2 shows the optical parameter characteristics corresponding to the fiber described in Table 1.

Abstract

一种超低衰减弯曲不敏感单模光纤，包括芯层和包层。芯层半径r 1为3.0～3.9μm，芯层相对折射率Δn 1为-0.04％～0.12％，芯层外从内向外依次包覆内包层，下陷内包层，辅助外包层和外包层，内包层半径r 2为8～14μm，相对折射率Δn 2为-0.35％～-0.10％，下陷内包层半径r 3为14～20μm，相对折射率Δn 3为-0.6％～-0.2％，辅助外包层半径r 4为35～50μm，相对折射率Δn 4范围为-0.4％～-0.15％。本光纤具有较低衰减系数和优异弯曲性能，并通过对光纤各芯包层剖面的合理设计，使光纤具有等于或大于8.4的MFD。本光纤的截止波长、弯曲损耗、色散等参数在应用波段良好，能兼容G657.A2标准。

Description

一种超低衰耗弯曲不敏感单模光纤 技术领域
本发明涉及一种用于光通信传输系统的超低衰耗弯曲不敏感单模光纤，该光纤具有较低的衰耗，优异的弯曲不敏感特性，且模场直径兼容G.657.A2标准，属于光通信技术领域。
背景技术
光纤通信因其具有容量大、传输距离远、传输速度快、经济等特点，已被广泛应用于长途干线网到城域网以及接入网。光纤通信技术的发展，一直以来都是以更快的传输速率、更大的容量以及更远的传输距离为目标，不断提升和改进光纤的性能指标以及光纤的通信技术。特别是近几年来，随着IP业务量的爆炸式增长，通信网络正开始向下一代可持续发展的方向迈进，而构筑具有巨大传输容量和距离的光纤基础设施是下一代网络的物理基础。为了满足光纤通信系统的发展需要，作为光纤通信网络传输媒质的光纤的相关性能指标也需要进一步改进。
光纤的衰减系数是光纤最重要的性能指标之一，在很大程度上决定了光纤通信的中继距离。光纤的衰减系数越小，则其携带的光信号可传输距离就越远，而在同样的传输距离下，其携带的光信号衰减幅度就越小。降低衰减系数可以有效提高光纤通信中的光信噪比OSNR，进一步提高系统的传输质量和传输距离。在长距离的光纤通信中，光信号是通过中继站来完成传输的，如果光纤的衰减系数越小，光信号的无中继传输距离就越远，那么就可以增加中继站之间的距离，从而大大减少中继站的设置，降低运营成本。因此，降低光纤的衰减系数无论是从优化系统结构还是降低运营成本方面，都具有非常重要的意义。而另一方面，随着近年来FTTX的不断发展，原有G.652光纤的性能已经难以满足用户要求，实际应用环境要求光纤具有一定的抗弯曲性能，于是在G.652光纤的基础上，开发出了新一代的弯曲不敏感单模光纤——G.657光纤，其中包含能够兼容G.652标准的G.657.A类光纤和不能兼容G.652标准的G.657.B类光纤。G.657.A类光纤和G.652.D光纤有很好的兼容性，且其相对于普通G.652.D光纤具有更好的抗弯曲性能，因此它被认为是最有可能替代现有G.652光纤的产品之一。所以发明一种和G.652标准兼容，并且具有更低衰减、相对较大模场直径同时还具有弯曲不敏感特性的新一代单模光纤成为通信光纤领域内的一个研究热点。
在光纤预制棒的制造过程中一般可以采用以下几种方法来降低光纤衰减。比如，采用更高纯度的原材料，提高生产环境和设备密封性能降低外界杂质引入的几率，如专利CN201110178833.3即采用提高光纤预制棒沉积过程中的气密性的方法，降低外界杂质的引入。或者采用更大外径的预制棒制造工艺，通过大尺寸预制棒的稀释效应降低光纤的整体衰 减。另外，在光纤制造过程中，裸光纤表面涂层的涂覆工艺也是影响光纤衰减性能的一个重要因素。但是，无论从理论上还是实际光纤制备中的成本和工艺控制上来讲，降低光纤的掺杂并优化光纤的剖面是最简单且有效的降低光纤衰减的方法。一般来说，掺杂材料的浓度越低，则瑞利散射所引起的损耗越小。在传统的单模光纤中，为了保证光纤中的全反射，芯层和内包层之间必须保证足够的折射率差值，芯层的相对折射率远远大于光纤的内包层；为了保证这样的设计，必须在芯层中进行大量的Ge或者Ge/F共掺形式的掺杂，而传统的光纤剖面设计中，激光能量在光纤剖面中成高斯分布形式分布，光纤激光能量有70％左右在相对掺杂较多的芯层部分传播，即高能量密度的激光传输集中在瑞利系数较大的高浓度掺杂芯层中传播。如果通过合理的光学剖面设计，设计一种能量非高斯分布的剖面，减少高浓度掺杂芯层中能量的损失，就可以显著降低光纤的衰减性能。
但在这些常规G.657光纤的剖面设计及制造方法中，芯层使用较大量的Ge/F共掺，为了获得最优的宏弯性能，芯层的相对折射率一般都大于0.35％，即芯层Ge掺杂较多，因此会带来较大的瑞利散射从而增加光纤的衰减。
文献CN201310394404提出一种超低衰耗光纤的设计，其使用了纯二氧化硅的外包层设计，但因为其使用的是典型的阶跃剖面结构，没有使用下陷内包层设计优化光纤的弯曲，且其芯层没有使用Ge进行掺杂，所以可能造成预制棒制备时出现粘度失配，所以可以发现其衰减和弯曲水平，相对较差。
发明内容
以下为本发明中涉及的一些术语的定义和说明：
从光纤纤芯轴线开始算起，根据折射率的变化，定义为最靠近轴线的那层为纤芯层，光纤的最外层即纯二氧化硅层定义为光纤外包层。
光纤各层相对折射率Δni由以下方程式定义，
Figure PCTCN2015096115-appb-000001
其中ni为纤芯的折射率，而nc为外包层折射率，即纯二氧化硅的折射率。
光纤芯层Ge掺杂的相对折射率贡献量ΔGe由以下方程式定义，
Figure PCTCN2015096115-appb-000002
其中nGe为假设纤芯的Ge掺杂物，在掺杂到没有其他掺杂物的纯二氧化硅中，引起二氧化硅玻璃折射率升高而得到的绝对折射率，而nc为最外包层折射率，即没有进行Ge或F掺杂的 纯二氧化硅的绝对折射率。
光缆截止波长λcc：
IEC(国际电工委员会)标准60793-1-44中定义：光缆截止波长λcc是光信号在光纤中传播了22米之后不再作为单模信号进行传播的波长。在测试时需通过对光纤绕一个半径14cm的圈，两个半径4cm的圈来获取数据。
本发明所要解决的技术问题旨在提供一种具有较低光纤制造成本、较低衰减系数和优异弯曲性能的超低衰耗弯曲不敏感单模光纤。
本发明为解决上述提出的问题所采用的技术方案为：包括有芯层和包层，其特征在于所述的芯层半径r1为3.0～3.9μm，芯层相对折射率Δn1为-0.04％～0.12％，芯层外从内向外依次包覆内包层，下陷内包层，辅助外包层和外包层，所述的光纤的内包层半径r2为8～14μm，相对折射率Δn2为-0.35％～-0.10％；所述的下陷内包层半径r3为14～20μm，相对折射率Δn3为-0.6％～-0.2％，所述的辅助外包层半径r4为35～50μm，相对折射率Δn4范围为-0.4％～-0.15％；所述外包层为纯二氧化硅玻璃层，最外层直径为125μm。
按上述方案，所述的芯层为锗氟共掺的二氧化硅玻璃层或只掺锗的二氧化硅玻璃，其中锗的掺杂贡献量为0.02％～0.10％，优选范围0.04％～0.08％。
按上述方案，所述光纤在1310nm波长的模场直径为8.4～9.1μm，优选条件下为8.5～8.8μm。
按上述方案，所述光纤的成缆截止波长等于或小于1260nm。
按上述方案，所述光纤的零色散点为1300～1324nm。
按上述方案，所述光纤的零色散斜率小于或等于0.092。
按上述方案，所述光纤在波长1310nm处的色散等于或小于18ps/nm*km，所述光纤在波长1625nm处的色散等于或小于22ps/nm*km。
按上述方案，所述光纤在波长1310nm处的衰耗等于或小于0.324dB/km；优选条件下等于或小于0.304dB/km。
按上述方案，所述光纤在波长1550nm处的衰耗等于或小于0.184dB/km；优选条件下等于或小于0.174dB/km。
按上述方案，所述光纤在波长1550nm处，R15mm弯曲半径弯曲10圈的宏弯损耗等于或小于0.03dB，R10mm弯曲半径弯曲1圈的宏弯损耗等于或小于0.1dB.
按上述方案，所述光纤的涂层厚度的典型值可以为250微米或200微米。
本发明的有益效果在于：1、合理的设计了光纤芯包层剖面结构和光纤内部的粘度匹配， 减少光纤制备过程中缺陷，降低光纤的衰减参数；2、设计了合理的光纤氟掺杂下陷结构，并通过对光纤各芯包层剖面的合理设计，使光纤具有等于或大于8.4的MFD；3、本发明的截止波长、弯曲损耗、色散等综合性能参数在应用波段良好，足够小的的成缆截止波长，以保证该类光纤在C波段传输应用中光信号的单模状态，光纤剖面采用多层阶梯状下陷包层结构，具有较宽的下陷包层结构用于限制基模泄露，对光纤的弯曲损耗具有较好的改进作用；能兼容G657.A2标准；4、最外层的外包层结构采用了纯二氧化硅的设计，降低了氟掺杂玻璃在光纤中的比重，从而降低了光纤制造生产成本。
附图说明
图1为本发明一个实施例的折射率剖面结构分布图。
具体实施方式
以下结合实施例进行详细描述。
包括有芯层和包层，所述的芯层为锗氟共掺的二氧化硅玻璃层，或为掺锗的二氧化硅玻璃层，芯层外从内向外依次包覆内包层、下陷内包层、辅助外包层和外包层。所述外包层为纯二氧化硅玻璃层。外包层的半径为125微米。
表一所列为本发明优选的实施例的折射率剖面参数，其中ΔGe为芯层中Ge掺杂的折射率贡献量。表二为表一所述光纤所对应的光学参数特性。
表一、本发明实施例的光纤剖面参数
序号 r1[μm] Δn1[％] ΔGe[％] r2[μm] Δn2[％] r3[μm] Δn3[％] r4[μm] Δn4[％]
1 3.4 0.04 0.08 10 -0.25 13.5 -0.52 42 -0.2
2 3.5 0.02 0.02 11.5 -0.33 15.5 -0.4 48 -0.38
3 3.7 0.01 0.05 12.5 -0.25 15.5 -0.45 45 -0.4
4 3 0.03 0.05 11 -0.24 14.5 -0.38 38 -0.36
5 3.2 0.1 0.1 9 -0.15 14 -0.38 41 -0.18
6 3.8 0.05 0.08 13 -0.18 17 -0.55 40 -0.22
7 3.3 0 0.08 10 -0.28 12.8 -0.51 46 -0.25
8 3.6 0.06 0.02 13 -0.21 18 -0.45 47 -0.27
9 3.1 -0.04 0.03 8.5 -0.32 13.7 -0.58 44 -0.38
10 3.5 -0.02 0.04 12 -0.21 19 -0.5 42 -0.3
表二、本发明实施例的光纤参数
Figure PCTCN2015096115-appb-000003
Figure PCTCN2015096115-appb-000004

Claims (9)

  1. 一种超低衰耗弯曲不敏感单模光纤，包括有芯层和包层，其特征在于所述的芯层半径r1为3.0～3.9μm，芯层相对折射率Δn1为-0.04％～0.12％，芯层外从内向外依次包覆内包层，下陷内包层，辅助外包层和外包层，所述的光纤的内包层半径r2为8～14μm，相对折射率Δn2为-0.35％～-0.10％；所述的下陷内包层半径r3为14～20μm，相对折射率Δn3为-0.6％～-0.2％，所述的辅助外包层半径r4为35～50μm，相对折射率Δn4范围为-0.4％～-0.15％；所述外包层为纯二氧化硅玻璃层，光纤最外层直径为125μm。
  2. 按权利要求1或2所述的超低衰耗弯曲不敏感单模光纤，其特征在于所述的芯层为锗氟共掺的二氧化硅玻璃层，其中锗的掺杂贡献量为0.02％～0.10％。
  3. 按权利要求1或2所述的超低衰耗弯曲不敏感单模光纤，其特征在于所述光纤在1310nm波长的模场直径为8.4～9.1μm。
  4. 按权利要求1或2所述的超低衰耗弯曲不敏感单模光纤，其特征在于所述光纤的成缆截止波长等于或小于1260nm。
  5. 按权利要求1或2所述的超低衰耗弯曲不敏感单模光纤，其特征在于所述光纤的零色散点为1300～1324nm；所述光纤的零色散斜率小于或等于0.092。
  6. 按权利要求1或2所述的超低衰耗弯曲不敏感单模光纤，其特征在于所述光纤在波长1310nm处的色散等于或小于18ps/nm*km，所述光纤在波长1625nm处的色散等于或小于22ps/nm*km。
  7. 按权利要求1或2所述的超低衰耗弯曲不敏感单模光纤，其特征在于所述光纤在波长1310nm处的衰耗等于或小于0.324dB/km。
  8. 按权利要求1或2所述的超低衰耗弯曲不敏感单模光纤，其特征在于所述光纤在波长1550nm处的衰耗等于或小于0.184dB/km。
  9. 按权利要求1或2所述的超低衰耗弯曲不敏感单模光纤，其特征在于所述光纤在波长1550nm处，R15mm弯曲半径弯曲10圈的宏弯损耗等于或小于0.03dB，R10mm弯曲半径弯曲1圈的宏弯损耗等于或小于0.1dB。
PCT/CN2015/096115 2015-04-28 2015-12-01 一种超低衰耗弯曲不敏感单模光纤 WO2016173253A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15890628.9A EP3290973A4 (en) 2015-04-28 2015-12-01 Ultralow-attenuation bend-insensitive single-mode optical fibre
KR1020177023831A KR102019579B1 (ko) 2015-04-28 2015-12-01 초저감쇠 굴곡 강화 단일모드 광섬유
JP2017545942A JP6671385B2 (ja) 2015-04-28 2015-12-01 極低損失でベンド不敏感の単一モード光ファイバ
US15/786,048 US10018779B2 (en) 2015-04-28 2017-10-17 Bending-insensitive single-mode fiber with ultra low attenuation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510206222.3 2015-04-28
CN201510206222.3A CN104749691B (zh) 2015-04-28 2015-04-28 一种超低衰耗弯曲不敏感单模光纤

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/786,048 Continuation US10018779B2 (en) 2015-04-28 2017-10-17 Bending-insensitive single-mode fiber with ultra low attenuation

Publications (1)

Publication Number Publication Date
WO2016173253A1 true WO2016173253A1 (zh) 2016-11-03

Family

ID=53589653

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/096115 WO2016173253A1 (zh) 2015-04-28 2015-12-01 一种超低衰耗弯曲不敏感单模光纤

Country Status (6)

Country Link
US (1) US10018779B2 (zh)
EP (1) EP3290973A4 (zh)
JP (1) JP6671385B2 (zh)
KR (1) KR102019579B1 (zh)
CN (1) CN104749691B (zh)
WO (1) WO2016173253A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104749691B (zh) * 2015-04-28 2018-05-01 长飞光纤光缆股份有限公司 一种超低衰耗弯曲不敏感单模光纤
CN104991307A (zh) * 2015-07-31 2015-10-21 长飞光纤光缆股份有限公司 一种超低衰减大有效面积的单模光纤
CN104991306A (zh) * 2015-07-31 2015-10-21 长飞光纤光缆股份有限公司 一种超低衰耗弯曲不敏感单模光纤
CN106443875A (zh) * 2016-08-22 2017-02-22 长飞光纤光缆股份有限公司 一种超低衰减弯曲不敏感单模光纤
CN110194587B (zh) * 2019-05-30 2020-07-10 长飞光纤光缆股份有限公司 一种光子晶体光纤、其预制棒、制备方法及应用
CN110488411B (zh) * 2019-08-19 2021-03-23 长飞光纤光缆股份有限公司 一种抗弯曲单模光纤
US11675124B2 (en) 2020-06-26 2023-06-13 Corning Incorporated Optical fiber with increased bend performance

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102099711A (zh) * 2007-11-09 2011-06-15 德雷卡通信技术公司 抗微弯光纤
CN103345017A (zh) * 2013-07-17 2013-10-09 长飞光纤光缆有限公司 一种弯曲不敏感单模光纤
CN103995314A (zh) * 2014-06-13 2014-08-20 江苏七宝光电集团有限公司 一种弯曲不敏感单模光纤及其生产工艺
CN104360434A (zh) * 2014-11-12 2015-02-18 长飞光纤光缆股份有限公司 一种超低衰减大有效面积的单模光纤
CN104749691A (zh) * 2015-04-28 2015-07-01 长飞光纤光缆股份有限公司 一种超低衰耗弯曲不敏感单模光纤
CN104991306A (zh) * 2015-07-31 2015-10-21 长飞光纤光缆股份有限公司 一种超低衰耗弯曲不敏感单模光纤

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1657575A4 (en) * 2003-04-11 2008-03-19 Fujikura Ltd OPTICAL FIBER
JP5279980B2 (ja) * 2004-01-08 2013-09-04 日本電信電話株式会社 単一モード光ファイバ
US7680381B1 (en) * 2008-11-25 2010-03-16 Corning Incorporated Bend insensitive optical fibers
JP5222752B2 (ja) * 2009-02-05 2013-06-26 株式会社フジクラ 光ファイバ
CN101598834B (zh) * 2009-06-26 2011-01-19 长飞光纤光缆有限公司 一种单模光纤及其制造方法
US8538219B2 (en) * 2010-10-29 2013-09-17 Corning Incorporated Large effective area optical fiber with low bend loss
CN102156323B (zh) * 2011-05-05 2012-06-06 长飞光纤光缆有限公司 一种单模光纤
CN102276144B (zh) 2011-06-29 2013-08-14 长飞光纤光缆有限公司 一种光纤预制棒沉积车床的旋转密封夹头
CN102645699B (zh) * 2012-05-02 2015-03-04 长飞光纤光缆股份有限公司 一种低衰减弯曲不敏感单模光纤
KR102126089B1 (ko) * 2012-12-28 2020-06-23 신에쓰 가가꾸 고교 가부시끼가이샤 광섬유 및 광섬유용 실리카 유리 모재
US9020316B2 (en) * 2013-02-28 2015-04-28 Corning Incorporated Low attenuation optical fibers with an F-graded index core
CN103454719B (zh) 2013-09-03 2015-09-30 长飞光纤光缆股份有限公司 一种单模光纤
ES2847900T3 (es) * 2013-12-20 2021-08-04 Draka Comteq Bv Fibra monomodo con un núcleo trapezoidal, que muestra pérdidas reducidas
CN104391351B (zh) * 2014-11-25 2017-07-21 长飞光纤光缆股份有限公司 一种抗弯曲多模光纤
CN104459876B (zh) * 2014-12-12 2017-04-12 长飞光纤光缆股份有限公司 超低衰减大有效面积的单模光纤

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102099711A (zh) * 2007-11-09 2011-06-15 德雷卡通信技术公司 抗微弯光纤
CN103345017A (zh) * 2013-07-17 2013-10-09 长飞光纤光缆有限公司 一种弯曲不敏感单模光纤
CN103995314A (zh) * 2014-06-13 2014-08-20 江苏七宝光电集团有限公司 一种弯曲不敏感单模光纤及其生产工艺
CN104360434A (zh) * 2014-11-12 2015-02-18 长飞光纤光缆股份有限公司 一种超低衰减大有效面积的单模光纤
CN104749691A (zh) * 2015-04-28 2015-07-01 长飞光纤光缆股份有限公司 一种超低衰耗弯曲不敏感单模光纤
CN104991306A (zh) * 2015-07-31 2015-10-21 长飞光纤光缆股份有限公司 一种超低衰耗弯曲不敏感单模光纤

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3290973A4 *

Also Published As

Publication number Publication date
EP3290973A1 (en) 2018-03-07
US10018779B2 (en) 2018-07-10
JP2018511077A (ja) 2018-04-19
KR102019579B1 (ko) 2019-09-06
CN104749691A (zh) 2015-07-01
KR20170104625A (ko) 2017-09-15
EP3290973A4 (en) 2018-11-21
JP6671385B2 (ja) 2020-03-25
CN104749691B (zh) 2018-05-01
US20180039019A1 (en) 2018-02-08

Similar Documents

Publication Publication Date Title
US10151873B2 (en) Single mode optical fiber with ultra-low attenuation and bend insensibility
CN102645699B (zh) 一种低衰减弯曲不敏感单模光纤
WO2016173253A1 (zh) 一种超低衰耗弯曲不敏感单模光纤
CN106772788B (zh) 一种截止波长位移单模光纤
JP6529666B2 (ja) 極低減衰で大有効面積の単一モード光ファイバ
CN104316994A (zh) 一种低衰减弯曲不敏感单模光纤
CN104155717B (zh) 一种低衰耗单模光纤
CN109298482B (zh) 一种低衰减和低弯曲损耗的大有效面积单模光纤
WO2014135054A1 (zh) 一种低衰减单模光纤
KR102106677B1 (ko) 초저감쇠 단일모드 광섬유
KR20130116009A (ko) 광섬유
CN107608023B (zh) 一种阶跃型超低衰减少模光纤
CN107422415B (zh) 一种超低衰减大有效面积的单模光纤
CN107247304B (zh) 一种用于模分复用系统的超低衰减少模光纤
KR20130041566A (ko) 구부림 손실 강화 광섬유
CN104216044B (zh) 一种低衰耗弯曲不敏感单模光纤
CN105334570A (zh) 一种低衰减弯曲不敏感单模光纤
CN106443875A (zh) 一种超低衰减弯曲不敏感单模光纤
CN107678087A (zh) 一种低衰减大有效面积单模光纤
WO2020119439A1 (zh) 一种低损耗大有效面积单模光纤及其制备方法
CN107490819B (zh) 具有超低衰减大有效面积的单模光纤
CN110297288B (zh) 一种低衰减阶跃型轨道角动量光纤
WO2023240881A1 (zh) 一种陆地用g.654.e光纤及其制作工艺
CN110244402B (zh) 一种超低损耗大有效面积单模光纤设计及其制造方法
CN116908957A (zh) 一种g.654.e光纤及其制备方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15890628

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 20177023831

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2017545942

Country of ref document: JP

Kind code of ref document: A

REEP Request for entry into the european phase

Ref document number: 2015890628

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE