Fujikura Limited

Nippon Telegraph and Telephone Corporation

Fujikura Co., Ltd.

Takashi Matsuzawa

Ken Osato

Naoki Okada

Yukiko Take

Yusuke Yamada

Mizuki Isaji

Shinya Hamaguchi

Yoshie Sajima

Hisaaki Nakane

Daisuke Kakuta

Akira Namazue

Yukihiko Shibata

Provided is an optical fiber ribbon capable of concurrently ensuring mid-span access performance and cable production performance. The optical fiber ribbonincludes three or more optical fibersarranged in parallel and connecting portionsconnecting the adjacent optical fibersthe connecting portionsbeing formed intermittently in each of a ribbon longitudinal direction X and a ribbon width direction Y. The optical fiber ribbonincluding the connecting portionshaving split strength which is set in the range from 1.50 gf to 21.0 gf, contributes to exhibiting both the mid-span access performance and the cable production performance.

Optical fiber ribbon and optical fiber cable housing the optical fiber ribbon

An optical fiber ribbon includes a plurality of optical fiber cores arranged in parallel spaced from each other; and a tape forming member having a coating portion covering an outer circumference of the optical fiber cores, and a coupling portion, integrally formed with the coating portion, intermittently coupling adjacent optical fiber cores, wherein the coating portion has an opening portion to expose a part of surfaces of the optical fiber cores, and at least a part of the coating portion is continuous in a longitudinal direction of the optical fiber cores.

Optical fiber ribbon and optical fiber cable

A manufacturing method for an optical fiber ribbon, in which: a plurality of optical fibers are arranged in parallel and the neighboring optical fibers are partially coupled with each other at given intervals in a longitudinal direction to form a subunit; and the optical fibers positioned at side edges of the neighboring subunits are partially coupled with each other at a given intervals in the longitudinal direction, includes: sending out the optical fibers in a parallel manner with intervals provided therebetween, applying an uncured resin to the optical fibers, continuously changing positions at which the uncured resin is interrupted by a plurality of interrupt members, and forming coupled portions at which the optical fibers are coupled to each other by irradiating resin curing energy, wherein a moving period or phase of the interrupt members is changed for every arbitrary optical fibers.

Manufacturing method of optical fiber ribbon, manufacturing device for optical fiber ribbon implementing said manufacturing method, and optical fiber ribbon manufactured with said manufacturing method

It is an object of the present invention to suppress a coating resin from being shaved off in an event where optical fibers are sent out from a coating dice. When a Young's modulus of ultraviolet curable resinslocated on outermost layers of optical fibersis 300 MPa or more, and the Young's modulus is 300 MPa to 600 MPa, a plurality of the optical fibersin which friction force measured by the following measurement method is 0.3 N or less are arranged in parallel to one another, these respective optical fibersare fixed to one another intermittently along a longitudinal direction thereof, and adhered portionsare formed.

Manufacturing method of optical fiber ribbon, and optical fiber ribbon manufactured by the manufacturing method

An optical fiber ribbon includes: a plurality of optical fibers arranged in parallel; and a tape material covering the plurality of optical fibers into a tape, in which the plurality of optical fibers are coated respectively with translucent color layers of different colors, and in at least two of the plurality of optical fibers, markings for identifying the optical fiber ribbon are provided at a same position in a longitudinal direction of the optical fiber ribbon.

Optical fiber ribbon, optical fiber cable, and wire configuration, each having identification marking

Provided is an method of manufacturing an optical fiber tape core wire with which, even when the optical fiber tape core wire is separated into optical fiber wires, it can be determined which optical fiber tape core wire each optical fiber wire is associated with. A fiber running length adjustment deviceadjusting the running lengths of the optical fiber wiresrunning from printers(A toD) to a tape forming deviceis used to adjust the running lengths of all the optical fiber wiresbetween the printersand the tape forming deviceto a same length. By this adjustment, markingsformed on each optical fiber wire(A toD) can be aligned with the corresponding markingsformed on the other fiber wiresto the same position.

Optical fiber tape core wire manufacturing method, manufacturing device, and optical fiber tape core wire and optical fiber cable manufactured with said manufacturing method

Growing community of inventors

Sakura, Japan

Takashi Matsuzawa