Tokyo, Japan
Tokyo, Japan

Fujikura Ltd. is a global, Tokyo-based electrical equipment manufacturing company, developing and manufacturing power and telecommunication systems products, including devices for optical fibres, such as cutters and splicers.Fujikura was founded by Zenpachi Fujikura when he began manufacturing silk and cotton insulated winding wires in 1885. In 1910 Fujikura Electric Wire Corporation was established with Tomekichi Fujikura, Zenpachi's younger brother, acting as the company's representative. Over the years the company expanded both in Japan and overseas and as of 2013 the company had subsidiaries across Europe, Asia, North and South America and North Africa.The company is listed on the Tokyo Stock Exchange and is a constituent of the Nikkei 225 stock index.In February 2014 the company received an order of special large core fibers from Tokyo University for the Subaru Telescope located on Mauna Kea, Hawaii. Wikipedia.


Time filter

Source Type

Patent
Fujikura Ltd, Nippon Telegraph and Telephone | Date: 2017-02-08

An optical fiber splicer includes a fiber fixing portion, a first optical fiber fixed to the fiber fixing portion, a clamp portion which is capable of holding and fixing an extending portion extended from the fiber fixing portion of the first optical fiber and a tip portion of a second optical fiber optically connected to the extending portion of the first optical fiber between a base member and a pressing member being openable and closable with respect to the base member, and a solid index matching material which is attached to a tip surface of the extending portion of the first optical fiber and is interposed between the first optical fiber and the second optical fiber.


An oxide superconducting wire of the invention includes a substrate (1, 11, 21, 31, 41, 51), an intermediate layer (2, 12, 22, 32, 42, 52) which is laminated on a main surface of the substrate, has one or more layers having an orientation, and has one or more non-orientation regions (2b, 3b, 12b, 13b, 22b, 23b, 32b, 33b, 43b, 52b, 53b) extending in a longitudinal direction of the wire, and an oxide superconducting layer (3, 13, 23, 33, 43, 53) which is laminated on the intermediate layer, has a crystal orientation controlled by the intermediate layer, and has non-orientation regions located on the non-orientation regions in the intermediate layer and is formed into multiple filaments.


Patent
Fujikura Ltd, Nippon Telegraph and Telephone | Date: 2017-01-25

A method of manufacturing an optical connector according to the invention includes: holding a first optical fiber by a pair of holding members at a position apart from an end face of a second end and through both sides thereof in a radial direction, the first optical fiber being provided with a solid refractive index-matching material layer, the refractive index-matching material layer being formed on the end face of the second end on an opposite side of an end face of a first end exposed to a front end of a ferrule; and inserting the first optical fiber into a fiber hole of the ferrule through the first end.


Patent
Fujikura Ltd | Date: 2017-02-22

In a heat spreading module for a portable electronic device configured such that a heat pipe is attached along a metal plate with which a heating element is brought into close contact, and heat of a heated region of the metal plate with which the heating element is brought into close contact is transferred to a place on the metal plate apart from the heated region by the heat pipe, the heat pipe is configured such that a container is formed of a pipe, a portion of the container arranged on the heated region is a heated portion, and a portion of the container apart from the heated region is a heat dissipation portion that dissipates heat to the metal plate, and the heated portion is formed in a flat shape, and the heat dissipation portion is formed to be thicker than the heated portion having the flat shape.


To provide a fiber laser apparatus capable of detecting a failure of an optical fiber within a wide range of the apparatus with an inexpensive configuration. The fiber laser apparatus 100 has a plurality of fiber laser units 110, a combiner 120 operable to optically combine output laser beams outputted from the fiber laser unit 110 to generate a combined laser beam, a laser emission portion 130 operable to emit the combined laser beam, output laser beam power detection parts 170 operable to detect a power of an output laser beam of each of the fiber laser units 110, a combined laser beam power detection part 140 operable to detect a power of the combined laser beam, and a failure detection part 160 operable to compare the total of detected powers of the output laser beams (total laser beam power) with the detected power of the combined laser beam and determine that a failure has occurred in the fiber laser unit 110 when a ratio of the power of the combined laser beam to the total laser beam power becomes lower than a predetermined threshold T.


Patent
Fujikura Ltd | Date: 2017-01-11

[Problem] The thickness on a ripcord in a circular optical cable is reduced, to improve workability. [Solution] An optical cable of the present invention includes: an optical fiber unit including optical fibers; a sheath, having a circular external form, configured to house the optical fiber unit in a housing portion; and two strength members embedded in the sheath; and two rip cords, wherein when a direction of connecting the two strength members sandwiching the housing portion is a first direction and a direction intersecting the first direction is a second direction, in a cross section of the optical cable, a cross-sectional shape of the housing portion has a dimension in the second direction greater than that in the first direction, and the two rip cords is disposed to sandwich the optical fiber unit such that a direction of connecting the two rip cords is in the second direction, in the cross section of the optical cable.


Disclosed is a flame retardant resin composition containing a base resin containing a polyolefin based compound, a silicone based compound, a fatty acid metal salt, a flame retardant agent consisting of at least one kind selected from the group consisting of calcium carbonate particles and silicate compound particles, a hindered phenol based compound, and a hindered amine based compound. In the composition, the silicone based compound is blended at a ratio of 0.1 part by mass or more and 10 parts by mass or less relative to 100 parts by mass of the base resin, the fatty acid metal salt is blended at a ratio of 0.1 part by mass or more and 20 parts by mass or less relative to 100 parts by mass of the base resin, the flame retardant agent is blended at a ratio of 5 parts by mass or more and 200 parts by mass or less relative to 100 parts by mass of the base resin, the hindered phenol based compound is blended at a ratio of 0.05 part by mass or more and 10 parts by mass or less relative to 100 parts by mass of the base resin, and the hindered amine based compound is blended at a ratio of 0.05 part by mass or more and 10 parts by mass or less relative to 100 parts by mass of the base resin. The hindered amine based compound has a monovalent group represented by the following formula (1) or the like.^(1) represents an alkyl group or alkoxy group having 1 to 30 carbon atoms, and R^(2) to R^(5) each independently represent an alkyl group having 1 to 6 carbon atoms).


Patent
Fujikura Ltd | Date: 2017-02-15

A wiring board (10) includes a transparent substrate (20) and a conductor pattern (30) provided on the transparent substrate (20), the conductor pattern (30) includes at least one detection electrode (31) having a mesh shape configured by first fine wires (311) and (312) intersecting each other, and the detection electrode (31) includes first disconnection portions (314) provided in parts except intersection points (315) in the first fine wires (311) and (312).


Patent
Fujikura Ltd, Nippon Telegraph and Telephone | Date: 2017-03-01

An optical fiber splicing structure of the invention includes: an optical fiber connector that is capable of holding an optical fiber at both sides thereof in a radial direction; a receiving optical fiber that is provided inside the optical fiber connector and has a hole opening at an end face of a connection end thereof; a solid refractive index matching layer that is formed at the end face of a connection end of the receiving optical fiber and enters the hole; and an external optical fiber that is to be butt-jointed to the receiving optical fiber by being butt-jointed to the receiving optical fiber at the end faces thereof with the refractive index matching layer interposed therebetween.


Patent
Fujikura Ltd | Date: 2017-02-01

A double mirror (Mi) of a light-guiding device of the present invention is made of (i) a first mirror (Mi1) that is mounted on a top surface of a base plate (B) and has a reflective surface (S1) reflecting an input beam reflected by the reflective surface (S1) and (ii) a second mirror (Mi2) that is mounted on a top surface of the first mirror (Mi1) and is a prism having a reflective surface (S2) reflecting the input beam that has been reflected by the reflective surface (S1), the input beam reflected by the reflective surface (S2) being totally reflected inside the prism.

Loading Fujikura Ltd collaborators
Loading Fujikura Ltd collaborators