Fujikura Limited

Nippon Telegraph and Telephone Corporation

Tadayoshi Sayama

Daiki Takeda

Naoki Okada

Shimei Tanaka

Satoru Shiobara

Keiichiro Sugimoto

Shinichi Niwa

Katsuyoshi Endoh

Masashi Ohno

An optical fiber cable includes: an optical fiber; a cable jacket that includes inner and outer tubes; first and second open detection lines; and an optical connector disposed at a first end of the optical fiber cable. A first end of the first open detection line and a first end of the second open detection line are disposed inside the optical connector and are not electrically connected to each other inside the optical connector. The optical fiber is disposed in one of a first region and a second region, wherein the first region is inside the inner tube and the second region is between the inner tube and the outer tube, and at least one of the first and second open detection lines is disposed in the other of the first region and the second region.

Optical fiber cable, optical combiner unit using optical fiber cable, and laser device

This optical fiber cable is provided with a covering resin including an outermost layer. The outermost layer is formed by a resin composition including: (a) a base resin prepared by adding at least one copolymer selected from an ethylene-vinyl acetate copolymer and an ethylene-ethyl acrylate copolymer to a high density polyethylene; (b) 25 to 90 parts by weight of a phosphate salt with respect to 100 parts by weight of the base resin; and (c) 0.75 to 15 parts by weight of either a silicone dispersed polyethylene or a silicone grafted polyethylene with respect to 100 parts by weight of the base resin.

Optical fiber cable for wiring in premises

An optical fiber cable includes an elongated optical element portion having an optical fiber, a pair of tensile strength members and an outer jacket. The optical fiber is composed of one or more plastic coated optical fibers, tight-buffered optical fibers or optical ribbon fibers. The pair of tensile strength members is arranged in parallel at both sides of the optical fiber in a width direction of the optical fiber. The outer jacket covers outer circumferences of the optical fiber and the pair of tensile strength members. A frictional coefficient of the outer jacket is equal to or less than 0.20. Shore D hardness of the outer jacket is equal to or more than 60.

Optical fiber cable and laying method thereof

Growing community of inventors

Sakura, Japan

Tadayoshi Sayama