公开(公告)号：US20150293325A1

公开(公告)日：2015-10-15

申请号：US14296003

申请日：2014-06-04

Applicant: Furukawa Electric Co., Ltd.

Inventor： Minoru KASAHARA ,  Minoru SAITO ,  Yoshihiro ARASHITANI

IPC: G02B6/44 ,  G02B6/02

CPC classification number: G02B6/4494 ,  G02B6/02395 ,  G02B6/4403 ,  G02B6/4404

Abstract: The purpose of the present invention is to provide, by a configuration or method different from conventional art, a coated optical fiber enabling reduced interface delamination between a glass fiber and a primary coating layer when the coated optical fiber is immersed in water, and a reduction of transmission loss increase. A coated optical fiber according to one embodiment of the present invention is provided with a glass fiber, a primary coating layer coated on the glass fiber, a secondary coating layer coated on the primary coating layer, and a colored layer coated on the secondary coating layer. The coated optical fiber is configured so that small water bubbles are generated substantially evenly within the primary coating layer when the coated optical fiber is immersed for 200 days in warm water of 60° C.

Abstract translation: 本发明的目的是通过与传统技术不同的结构或方法来提供一种涂覆光纤，当涂覆的光纤浸入水中时，能够减少玻璃纤维和主要涂层之间的界面分层，并且还原 的传输损耗增加。 根据本发明的一个实施方案的涂覆光纤具有玻璃纤维，涂覆在玻璃纤维上的主涂层，涂覆在第一涂层上的二次涂层和涂覆在第二涂层上的着色层 。 涂覆光纤被配置为使得当涂覆的光纤在60℃的温水中浸渍200天时，在主涂层内基本上均匀地产生小的水泡。

公开(公告)号：US20220397732A1

公开(公告)日：2022-12-15

申请号：US17821537

申请日：2022-08-23

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Minoru KASAHARA ,  Yoshihiro ARASHITANI ,  Kouji MOCHIDUKI ,  Masahiro YABE

IPC: G02B6/44 ,  G02B6/02

Abstract: The present invention satisfies at least one of the condition of the degree of freedom of a primary layer 11 shown in the equation (I) and the condition of the rigidity of a secondary layer 12 shown in the equation (II). Thus, a coated optical fiber 1 capable of suppressing transmission loss in a low temperature environment is provided, in which, even when an optical fiber 10 having a large effective core cross-sectional area Aeff of the optical fiber 10 at a wavelength of 1550 nm and having high microbend sensitivity is used, transmission loss in a low temperature environment can be suppressed. [Math. 1] βP×PISM

公开(公告)号：US20210270448A1

公开(公告)日：2021-09-02

申请号：US17324645

申请日：2021-05-19

Applicant: FURUKAWA ELECTRIC CO., LTD.

Inventor： Zyunpei WATANABE ,  Hiroki TANAKA ,  Kenichi SUYAMA ,  Yoshihiro ARASHITANI

IPC: F21V15/01 ,  C03C25/12 ,  C23C16/54 ,  H05B45/10 ,  B29C33/06 ,  H05B1/02 ,  B29C35/08 ,  B05C9/14 ,  B29C35/10

Abstract: A bare optical fiber manufacturing method includes applying an ultraviolet curable resin applied around an optical fiber; and irradiating the ultraviolet curable resin with ultraviolet light emitted from semiconductor ultraviolet light emitting elements, by use of an ultraviolet irradiation device having plural ultraviolet irradiation units each having plural positions where the ultraviolet light is emitted toward the ultraviolet curable resin, the plural positions being arranged on the same circle, the plural ultraviolet irradiation units being arranged in a traveling direction of the optical fiber such that the optical fiber passes centers of the circles, at least two of the plural ultraviolet irradiation units being differently arranged with respect to circumferential direction angles thereof around an axis that is the traveling direction of the optical fiber.

公开(公告)号：US20210199883A1

公开(公告)日：2021-07-01

申请号：US17200458

申请日：2021-03-12

Applicant: FURUKAWA ELECTRIC CO. LTD.

Inventor： Minoru KASAHARA ,  Yoshihiro ARASHITANI ,  Kouji MOCHIDUKI ,  Masahiro YABE

IPC: G02B6/02 ,  C03C25/1065 ,  C03C25/105

Abstract: 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 Aeff 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] βP×PISM≥600   (I) (S/P)×(SISM/PISM)≤1,000   (II)

公开(公告)号：US20180273427A1

公开(公告)日：2018-09-27

申请号：US15995796

申请日：2018-06-01

Applicant: Furukawa Electric Co., Ltd.

Inventor： Hiroki TANAKA ,  Yutaka HOSHINO ,  Hirotaka WATANABE ,  Yoshihiro ARASHITANI ,  Kenji YOKOMIZO ,  Tomohiro ISHIMURA

IPC: C03C25/24 ,  G02B6/44 ,  C03C25/104 ,  C03C25/475 ,  G02B6/02

Abstract: An optical fiber ribbon is intermittently connected in a length direction by an intermittent connection which includes a polyol having a weight-average molecular weight of 3000 to 4000 in a specific amount relative to the entire intermittent connection and which has Young's modulus at 23° C. within a specific range. When collectively unitizing optical fiber ribbons to form an optical fiber cable, an optical fiber ribbon is formed which maintains advantages of the optical fiber ribbon and which prevents cracks of the intermittent connection and detachment of the intermittent connection from a colored optical fiber core when the cable is subjected to repetitive ironing.

公开(公告)号：US20150234140A1

公开(公告)日：2015-08-20

申请号：US14704503

申请日：2015-05-05

Applicant: Furukawa Electric Co., Ltd.

Inventor： Hiroki TANAKA ,  Minoru SAITO ,  Hirotaka WATANABE ,  Hiroaki ITO ,  Yukio ISHII ,  Yoshihiro ARASHITANI

IPC: G02B6/44

CPC classification number: G02B6/443 ,  G02B6/44 ,  G02B6/4403

Abstract: An optical fiber ribbon according to the present invention includes a collective coating layer containing an ultraviolet curable resin containing amorphous PPG and an amorphous monomer, the collective coating layer formed around coated optical fibers. The collective coating layer has an equilibrium elastic modulus of 12 MPa to 20 MPa, both inclusive, and a yield point elongation of 5% to 9%, both inclusive, and the adhesion between the collective coating layer and the outermost layers of the coated optical fibers is 12 N/cm to 15 N/cm, both inclusive.

Abstract translation: 根据本发明的光纤带包括含有含有无定形PPG和无定形单体的紫外线固化树脂的集合涂层，在涂覆光纤周围形成集合涂层。 集合涂层的平均弹性模量为12MPa〜20MPa，屈服点伸长率为5％〜9％，并且涂布光学元件的集合涂层与最外层之间的粘合力 纤维为12N / cm至15N / cm，包括端面。