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    • 6. 发明公开
    • 광파이버
    • 光纤
    • KR1020060009839A
    • 2006-02-01
    • KR1020057019332
    • 2004-04-12
    • 가부시키가이샤후지쿠라
    • 마츠오쇼이치로히메노구니하루하라다고이치이케다마사타카
    • G02B6/028
    • G02B6/02009G02B6/0365G02B6/03672G02B6/03688G02B6/03611
    • An optical fiber has a core provided in the center, a first clad layer (2) on the periphery of the core (1), a second clad layer (3) on the periphery of the first clad layer (2), and a third clad layer (4) on the periphery of the second clad layer (3). The maximum refractive index of the core is greater than any of those of the first clad layer, the second clad layer, and the third clad layer. The maximum refractive index of the second clad layer is smaller than any of those of the first clad layer and the third clad layer. The value of a 2/a1 is between 2.5 and 4.5, both inclusive, with a 1 being the radius of the core and a2 being the radius of the outer edge of the first clad layer. Further, a relative refractive index difference of the core, with the refractive index of the third clad as the standard, is between 0.20 and 0.70%, both inclusive.
    • 光纤具有设置在中心的芯体,在芯体(1)的周围的第一覆盖层(2),在第一覆盖层(2)的周围的第二覆盖层(3) 包层(4)在第二包覆层(3)的周围。 芯的最大折射率大于第一包层,第二覆层和第三覆层中的任一者的最大折射率。 第二覆盖层的最大折射率小于第一覆盖层和第三覆盖层中的任何一个的最大折射率。 a 2 / a1的值在2.5和4.5之间,其中1是芯的半径,a2是第一包层的外边缘的半径。 此外,以第三包层的折射率为标准的芯的相对折射率差为0.20-0.70%(包括端值)。