公开(公告)号：US20100166373A1

公开(公告)日：2010-07-01

申请号：US12663178

申请日：2009-02-20

申请人： Tetsuya Nakanishi ,  Fumiaki Satou ,  Katsuyki Aihara ,  Hiroshi Miyano ,  Takashi Sasaki

发明人： Tetsuya Nakanishi ,  Fumiaki Satou ,  Katsuyki Aihara ,  Hiroshi Miyano ,  Takashi Sasaki

IPC分类号： G02B6/44 ,  G02B6/036

CPC分类号： G02B6/0365 ,  G02B6/02395 ,  G02B6/4433

摘要： Provided is an optical fiber that has a small bending loss, can be securely prevented from being fractured due to accidental bending during installation or other operations, and is compliant with the G. 652 standard. An optical fiber 1 includes a core 11, a first cladding 12, a second cladding 13, and a third cladding 14. The relative refractive index difference Δ1 of the core 11 is in the range of 0.3% to 0.38%, the relative refractive index difference Δ2 of the first cladding 12 is equal to or smaller than 0%, and the relative refractive index difference Δ3 of the second cladding 13 is in the range of −1.8% to −0.5%. The inner radius r2 and the outer radius r3 of the second cladding 13 satisfy the expression “0.4r2+10.5

摘要翻译： 提供了具有小弯曲损耗的光纤，可以可靠地防止由于安装或其他操作期间的意外弯曲而导致的断裂，并且符合G.652标准。 光纤1包括芯11，第一包层12，第二包层13和第三包层14.芯11的相对折射率差Dgr; 1在0.3％至0.38％的范围内，相对 第一包层12的折射率差Dgr2等于或小于0％，第二包层13的相对折射率差Dgr 3在-1.8％至-0.5％的范围内。 第二包层13的内半径r2和外半径r3满足表达式“0.4r2 + 10.5