OPTICAL FIBER FOR OPTICAL AMPLIFYING
    88.
    发明申请
    OPTICAL FIBER FOR OPTICAL AMPLIFYING 审中-公开
    用于光学放大的光纤

    公开(公告)号:WO01039339A1

    公开(公告)日:2001-05-31

    申请号:PCT/JP2000/008201

    申请日:2000-11-21

    Abstract: An optical fiber for optical amplifying, capable of amplifying optical signals at least in the vicinity of wavelengths of 1.57 to 1.62 mu m with a high gain in optical communication or the like. A clad (5) lower in refractive index than a core (1) is formed on the outer peripheral side of the erbium-added core (1), with the relative refractive index difference DELTA of the core (1) with respect to the clad (5) set to at least 0.3% and up to 1%. The core has a composition Er-Al2O3-GeO2-SiO2, and the clad has a composition SiO2, with erbium added to the entire region of the core at a concentration of 1000 wtppm and with the cutoff wavelength of the optical fiber set to 1400 nm. A constant cutoff wavelength of the optical fiber and an optimized relative refractive index difference DELTA can optimize a core diameter, avoid a reduction in gain due to an optical fiber bending loss, and increase a gain per optical fiber unit length by increasing an erbium absorption amount per optical fiber unit length.

    Abstract translation: 一种用于光放大的光纤,能够至少在1.57至1.62μm的波长附近放大光信号,在光通信等中具有高增益。 在铒添加芯(1)的外周侧形成折射率低于芯(1)的包层(5),芯(1)的相对折射率差DELTA相对于包层 (5)设置为至少0.3%和高达1%。 该芯具有Er-Al 2 O 3 -GeO 2 -SiO 2组成,并且包层具有组成SiO 2,铒以1000重量ppm的浓度添加到芯的整个区域,并且光纤的截止波长设定为1400nm 。 光纤的恒定截止波长和优化的相对折射率差DELTA可以优化芯直径,避免由于光纤弯曲损耗而导致的增益降低,​​并且通过增加铒吸收量来增加每个光纤单元长度 每个光纤单元长度。

    Rare earth doped optical fiber and method for manufacturing the same
    90.
    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

    Inventor: KIM SEONG-JIN

    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。

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