公开(公告)号：EP3851890A1

公开(公告)日：2021-07-21

申请号：EP19860490.2

申请日：2019-09-11

申请人： FURUKAWA ELECTRIC CO., LTD.

发明人： KASAHARA, Minoru ,  ARASHITANI, Yoshihiro ,  MOCHIDUKI, Kouji ,  YABE, Masahiro

IPC分类号： G02B6/44 ,  C03C25/104

摘要： Provided is a coated optical fiber and an optical fiber cable capable of suppressing transmission loss (microbend loss) even in an optical fiber having high microbend sensitivity.
In the present invention, the degree of freedom of a primary layer 11 represented by the equation (I) and the rigidity of a secondary layer 12 represented by the equation (II) are set in specific ranges, respectively. Thus, the present invention provides a coated optical fiber 1 capable of suppressing the transmission loss even when an optical fiber 10 having high microbend sensitivity such as a BI fiber having a large effective core cross-sectional area A eff of an optical fiber is used. The present invention can be widely used as a coated optical fiber 1 constituting a coated optical fiber ribbon or as a coated optical fiber 1 housed in an optical fiber cable. Further, an optical fiber cable including such coated optical fibers 1 enjoys the effect of the above-described coated optical fiber 1.
[Math. 1] β P × P ISM ≥ 600 S / P × S ISM / P ISM ≤ 1,000

公开(公告)号：EP3933466A1

公开(公告)日：2022-01-05

申请号：EP20782315.4

申请日：2020-03-25

申请人： Furukawa Electric Co., Ltd.

发明人： TOMIYASU, Takahiro ,  ISHII, Hirotatsu ,  EMORI, Yoshihiro ,  SUYAMA, Kenichi ,  MOCHIDUKI, Kouji

IPC分类号： G02B6/02 ,  G02B6/44

摘要： An optical processing structure of an optical fiber includes: an optical fiber that includes a core, a cladding, and a coating, the coating being partially removed; a thermally conductive protective material made of a silicone-based thermally conductive compound and provided around the cladding in a coating removed region of the optical fiber; and a thermally conductive base material on which the optical fiber is placed. The thermally conductive protective material contains a filler having a refractive index higher than that of the cladding. The filler is present in a region where evanescent light seeping out of the cladding is present when cladding mode light propagating in the cladding is totally reflected.

公开(公告)号：EP2816383A1

公开(公告)日：2014-12-24

申请号：EP12868565.8

申请日：2012-10-26

申请人： Furukawa Electric Co., Ltd.

发明人： TANAKA, Hiroki ,  KASAHARA, Minoru ,  MOCHIDUKI, Kouji ,  SAITO, Minoru ,  NAKAJIMA, Yasuo

IPC分类号： G02B6/44

CPC分类号： G02B6/4403 ,  G02B6/02395 ,  G02B6/4402 ,  G02B6/4409 ,  G02B6/4482

摘要： The present invention provides a colored optical fiber that shows anti-microbend property and hot-water resistance, an optical fiber ribbon that utilizes the same, and an optical fiber cable.
It is a colored optical fiber 1, which comprises two coating layers of a primary coating layer 31 and a secondary coating layer 32, wherein either one of the primary coating layer 31 or the secondary coating layer 32 is colored, both coating layers have equilibrium elastic moduli of 60 MPa or less, and the secondary coating layer 32 has a relaxation modulus of 410 MPa or more, an optical fiber ribbon 4 that utilizes it, and an optical fiber cable 8.

摘要翻译： 本发明提供一种显示抗微生物性和耐热水性的有色光纤，利用该光纤的光纤带，以及光缆。 它是一个有色光纤1，它包括一个主涂层31和二次涂层32的两个涂层，其中一次涂层31或二次涂层32中的任一个被着色，两个涂层均具有平衡弹性 60MPa以下的模量，第二被覆层32的松弛模量为410MPa以上，利用它的光纤带4和光纤电缆8。