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    Rare earth doped optical fiber and method for manufacturing the same
    182.
    发明专利
    Rare earth doped optical fiber and method for manufacturing the same 审中-公开
    稀土接地光纤及其制造方法

    公开(公告)号：JP2014143287A

    公开(公告)日：2014-08-07

    申请号：JP2013010489

    申请日：2013-01-23

    Applicant: Mitsubishi Cable Ind Ltd ,  三菱電線工業株式会社

    Inventor： KIM SEONG-JIN

    IPC: H01S3/067 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03C13/04

    CPC classification number: C03C13/045 ,  C03C3/06 ,  C03C2201/12 ,  C03C2201/28 ,  C03C2201/31 ,  C03C2201/3476 ,  C03C2201/3488 ,  C03C2201/36

    Abstract: PROBLEM TO BE SOLVED: To provide a Yb-doped optical fiber having low transmission loss, high photo darkening resistance or low PD loss increase, and high conversion efficiency.SOLUTION: In a silica glass optical fiber including a core doped with a rare earth element and at least P and a cladding provided on an outer periphery of the core, the core NA is 0.05 or more and 0.25 or less, the concentration of the rare earth element doped in the core is 2 wt.% or more and 10 wt.% or less, the concentration of P doped in the core is 3 wt.% or more and 20 wt.% or less, and the minimum transmission loss of the core in a wavelength band from 1,000 nm to 1,700 nm is 3 dB/km or more and 100 dB/km or less.

    Abstract translation: 要解决的问题：提供一种具有低传输损耗，高光变暗电阻或低PD损耗增加以及高转换效率的Yb掺杂光纤。解决方案：在包括掺杂有稀土元素的芯的石英玻璃光纤中 并且至少设置在芯的外周上的P和包层，芯NA为0.05以上且0.25以下，掺杂在芯中的稀土元素的浓度为2重量％以上且10重量％以下。 在芯中掺杂的P的浓度为3重量％以上且20重量％以下，核心在1000nm〜1700nm的波长带中的最小传输损耗为3dB / km 以上且100dB / km以下。

    Optical fiber
    183.
    发明专利
    Optical fiber 有权
    光纤

    公开(公告)号：JP2014007255A

    公开(公告)日：2014-01-16

    申请号：JP2012141362

    申请日：2012-06-22

    Applicant: Mitsubishi Cable Ind Ltd ,  三菱電線工業株式会社

    Inventor： KIM SEONG-JIN

    IPC: H01S3/067 ,  C03C13/04

    CPC classification number: C03C13/045 ,  C03C3/06 ,  C03C4/12 ,  C03C2201/12 ,  C03C2201/28 ,  C03C2201/31 ,  C03C2201/3488 ,  C03C2201/36

    Abstract: PROBLEM TO BE SOLVED: To provide an optical fiber having low transmission loss, high photo-darkening resistance or PD loss increase, and high nonlinearity resistance.SOLUTION: The optical fiber comprises a core having Yb, Al and F added thereto, and a clad provided on an outer periphery of the core. The density of Yb added to the core is 0.05-0.5 mol%. The density of Al is 0.3-2 mol%. The density of F is 0.1-1 mol%.

    Abstract translation: 要解决的问题：提供具有低传输损耗，高光变暗电阻或PD损耗增加以及高非线性电阻的光纤。解决方案：光纤包括添加有Yb，Al和F的芯和包层 设置在芯的外周。 加入核心的Yb的密度为0.05-0.5摩尔％。 Al的密度为0.3-2mol％。 F的密度为0.1-1摩尔％。

    Manufacture of fiber for optical communication
    187.
    发明专利
    Manufacture of fiber for optical communication 失效
    光纤通信光纤制造

    公开(公告)号：JPS59195559A

    公开(公告)日：1984-11-06

    申请号：JP6480784

    申请日：1984-03-30

    Applicant: Fujikura Ltd

    Inventor： YAMAUCHI RIYOUZOU ,  INADA KOUICHI ,  KOBAYASHI TOSHIAKI

    IPC: C03B37/12 ,  C03B37/10 ,  C03C13/00 ,  C03C13/04 ,  C03C25/10 ,  G02B6/00 ,  G02B6/44

    CPC classification number: C03C3/06 ,  C03C13/045 ,  C03C2201/23 ,  C03C2201/28

    Abstract: PURPOSE:To manufacture a nearly colorless fiber contg. P in the core and having a low OH content by spinning a fiber and heating it immediately after primary coating. CONSTITUTION:A base material 10 for an optical fiber having a core contg. P is heated in a heating furnace 12 for spinning to spin a fiber, and the fiber is subjected to primary coating with an extruder 16 for primary coating. Immediately after the coating, the fiber is heated at 350-500 deg.C for 2-10sec in a heating furnace 18 for heat treatment, and it is coiled around a coiling drum 20. In case of a conventional fiber having a core of P doped quartz glass, a large absorption loss in the range of ultraviolet rays-visible light-near infrared rays is caused in the fiber immediately after spinning, and coloration is also caused. A P doped fiber having a low OH content and causing a small loss even in the visible region can be obtd. by carrying out said heat treatment.

    Abstract translation: 目的：制造几乎无色的纤维。 P在芯中并且通过纺丝纤维并具有低OH含量并且在初次涂覆之后立即加热。 构成：用于光纤的基材10， P在加热炉12中加热，纺丝纺丝，纤维用初级涂布用挤出机16进行一次涂布。 涂布后立即在加热炉18中将纤维在350-500℃加热2-10秒，进行热处理，并将其卷绕在卷取滚筒20周围。在具有P的核心的常规纤维的情况下 掺杂的石英玻璃，在纺丝后立即在纤维中引起紫外线 - 可见光 - 近红外线范围内的大的吸收损失，并且也引起着色。 可以看出，即使在可见光区域也具有低OH含量并导致小损耗的P掺杂光纤。 通过进行所述热处理。

    Optical fiber for maintaining plane of polarization
    188.
    发明专利
    Optical fiber for maintaining plane of polarization 失效
    用于维护极化平面的光纤

    公开(公告)号：JPS59178406A

    公开(公告)日：1984-10-09

    申请号：JP5429583

    申请日：1983-03-30

    Applicant: Hitachi Cable Ltd

    Inventor： KATOU MASAAKI ,  MIKOSHIBA KOUICHI

    IPC: C03B37/012 ,  C03B37/018 ,  C03C13/04 ,  G02B6/00 ,  G02B6/02 ,  G02B6/024 ,  G02B6/10

    CPC classification number: G02B6/105 ,  C03C3/06 ,  C03C13/045 ,  C03C2201/10 ,  C03C2201/28

    Abstract: PURPOSE:To obtain an optical fiber for maintaining plane of polarization which has excellent resistance to radiation and stable characteristics by specifying the components of the core, clad and inside jacket thereof respectively at specific values. CONSTITUTION:A core 31 is made into the constitution consisting of high purity SiO2 and contg. no special dopant, a clad 32 is made into the constitution consisting essentially of SiO2 and contg. B2O3 and fluorine, an inside jacket 33 is made into the constitution consisting essentially of SiO2 and contg. P2O5 and B2O3, and an outside jacket 34 is made into the constitution consisting essentially of SiO2 and contg. no special dopant. The clad 32 contains SiO2 at a higher rate than in the jacket 33 and the refractive index of the clad 32 is lower than that of the jacket 33. The total content of P2O5 and B2O3 of the jacket 33 is 5-20mol% and the ratio of B2O3 to P2O5 is made 1-2 times in mol%. Then the optical fiber for maintaining plane of polarization having excellent resistance to radiation and stable characteristics is thus obtd.

    Abstract translation: 目的：为了获得具有优异的耐辐射性和稳定特性的保持偏振面的光纤，分别以其特定值指定芯，包层和内套。 构成：将芯31制成由高纯度SiO 2和不锈钢构成的结构。 没有特殊的掺杂剂，包层32被制成基本上由SiO2组成的结构。 B 2 O 3和氟，内部护套33被制成基本上由SiO 2组成的结构。 P2O5和B2O3，并且外部护套34被制成基本上由SiO 2组成的结构。 无特殊掺杂剂。 包层32以比夹套33更高的速率含有SiO 2，并且包层32的折射率低于护套33的折射率。护套33的P2O5和B2O3的总含量为5-20mol％，并且比例 的B 2 O 3〜P 2 O 5为摩尔％的1-2倍。 因此，可以看到用于保持具有优良的耐辐射性和稳定特性的极化保持平面的光纤。

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