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    • 7. 发明专利
    • Optical fiber
    • 光纤
    • JP2013061620A
    • 2013-04-04
    • JP2012047010
    • 2012-03-02
    • Sumitomo Electric Ind Ltd住友電気工業株式会社
    • HIRANO MASAAKIHARUNA TETSUYATAMURA YASUAKIYAMAMOTO YOSHINORI
    • G02B6/036
    • G02B6/02219C03B2201/07C03B2201/12C03B2201/20C03B2201/31C03B2201/50C03B2203/22C03B2203/23C03C3/06C03C13/045C03C2201/08G02B6/03611
    • PROBLEM TO BE SOLVED: To provide an optical fiber which is suitably used as an optical transmission path of an optical communication system and can improve an OSNR.SOLUTION: In an optical fiber which has a core portion and a cladding portion, when an effective cross section is represented by Aeff and a mode field diameter is represented by MFD, a k value represented by k=4Aeff/(πMFD) is 1.08 or more, wavelength dispersion is +19.0 ps/nm/km or more and +21.9 ps/nm/km or less, and the mode field diameter MFD is 10.3 μm or more and 13.0 μm or less, at a wavelength of 1,550 nm. When a position in the radial direction of which a refractive index becomes the minimum value Nin the core portion is represented by r, a position in the radial direction of which a refractive index becomes the maximum value Nin the core portion is represented by r, and a radius of the core portion is represented by r, the relationship becomes r
    • 要解决的问题:提供适合用作光通信系统的光传输路径的光纤,并且可以提高OSNR。 解决方案:在具有芯部分和包层部分的光纤中,当有效截面用Aeff表示并且模场直径由MFD表示时,由k = 4Aeff /(πMFD 2 )为1.08以上,波长色散为+19.0ps / nm / km以上,+ 21.9ps / nm / km以下,模场直径MFD为10.3μm, 在1550nm波长处为13.0μm以下。 当折射率成为芯部的最小值N 1 的径向位置由r 1 2 的径向位置由r 2 < SB>,并且芯部的半径由r 3 表示,关系变为r 1 2 3 ,R = r 3 / r 2 大于1.0和5.4或更小,并且最大值N 2之间的特定折射率差Δ 12 芯部的折射率的最小值N 1 为0.05%以上。 版权所有(C)2013,JPO&INPIT
    • 9. 发明专利
    • Optical fiber strand and its manufacturing method
    • 光纤条及其制造方法
    • JP2006058494A
    • 2006-03-02
    • JP2004238824
    • 2004-08-18
    • Fujikura Ltd株式会社フジクラ
    • OKADA KENJIHIRAFUNE SHUNICHIROFUJIMAKI MUNEHISA
    • G02B6/02C03B37/15G02B6/00G02B6/44
    • C03B37/02727C03B2201/31C03B2203/22C03B2203/23C03B2205/45C03B2205/56G02B6/02219Y02P40/57
    • PROBLEM TO BE SOLVED: To provide an optical fiber strand which has a small distribution difference in the radial direction of the residual stress of the optical fiber strand and which is capable of suppressing Rayleigh scattering, too, and also to provide a manufacturing method in which a proper slow-cooling temperature can be applied to the bare optical fiber without requiring a long slow-cooling length even in the case of high speed drawing of the optical fiber strand. SOLUTION: The optical fiber strand includes a core part and a clad part composed of at least one or more clad layers surrounding the core part. The optical fiber strand is characterized in that, in the clad part, the radial distribution S(r) of the residual stress in the optical axis direction of the outermost clad layer is a tensile stress in the almost entire region in the radial direction and that it is reduced from the inner periphery to the circumference. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:为了提供一种在光纤束的残余应力的径向上的分布差小且能够抑制瑞利散射的光纤线束,并且还提供制造 即使在光纤线的高速拉伸的情况下,也可以对裸光纤进行适当的缓慢冷却温度而不需要长的慢冷却长度的方法。 解决方案:光纤线包括芯部分和由围绕芯部分的至少一个或多个包覆层组成的包层部分。 光纤束的特征在于,在包层部中,最外包层的光轴方向的残留应力的径向分布S(r)是在径向的几乎整个区域的拉伸应力, 它从内周减少到圆周。 版权所有(C)2006,JPO&NCIPI