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    • 13. 发明公开
    • MULTICORE FIBER
    • MULTICORE纤维
    • EP3290970A1
    • 2018-03-07
    • EP16786486.7
    • 2016-04-26
    • Fujikura Ltd.National University Corporation Hokkaido University
    • SASAKI YusukeTAKENAGA KatsuhiroSAITOH Kunimasa
    • G02B6/02G02B6/036G02B6/44
    • G02B6/02042G02B6/02G02B6/02014G02B6/02023G02B6/036G02B6/0365G02B6/03694G02B6/44
    • The present invention relates to a multicore fiber for performing communication using light up to an xth-order LP mode (where x is an integer of 1 or more) in a communication band. Each of a plurality of cores 11 propagates light up to an (x + 1)th-order LP mode. A core pitch Λ is set to a distance at which crosstalk of the light up to the xth-order LP mode becomes -40 dB/km or less and crosstalk of light of the (x + 1)th-order LP mode becomes -30 dB/km or more. A distance Tc between the core 11 disposed on an outermost side in a clad 20 and a cover layer 30 is set to a distance at which an excessive loss of the light up to the xth-order LP mode due to absorption into the cover layer becomes 0.001 dB/km or less and an excessive loss of the light of the (x + 1)th-order LP mode due to absorption into the cover layer becomes 3 dB/km or more.
    • 本发明涉及在通信频带中使用直到x阶LP模式(其中x是1或更大的整数)的光执行通信的多芯光纤。 多个芯11中的每一个将光传播到(x + 1)阶LP模式。 芯间距Λ被设定为直到x次LP模式的光的串扰变为-40dB / km或更小并且(x + 1)次LP模式的光的串扰变成-30 dB / km或更多。 设置在包层20的最外侧的芯11与覆盖层30之间的距离Tc被设定为由于吸收到覆盖层中而导致直到x次LP模式的光的过度损失变为的距离 0.001dB / km或更小,并且由于吸收到覆盖层中而导致的(x + 1)阶LP模式的光的过度损失变为3dB / km或更大。