Abstract: A cable wherein even when there is a substantial volume of cable identifying information for identifying the cable, all of that cable identifying information can be simply and speedily written-in. This cable has a cable core, an integrated member with a chain of RFIDs including a plurality of RFID elements arranged at suitable intervals along a longitudinal direction of the cable core, to and from which cable identifying information can be written-in and read-out by transmission of electromagnetic energy, and a transmission coaxial cable for collectively writing-in cable identifying information to all of the RFID elements.

Abstract: An optical fiber cable including a slotted core (3) having a suitable number of slots (7) and identification members (25) disposed in a designated slot (7B) of the slots (7) for identifying cable information.

Abstract: The manufacturing apparatus for optical fiber cord is provided with an extrusion machine, a cooling chamber, an intermediate pulling device, a heating chamber, a final pulling device, and a winding machine wherein the machines, the devices and the chambers are disposed in this order. One or more optical fiber cores and one or more reinforcing fibers are sheathed with thermoplastic resin by the extrusion machine. The thermoplastic resin is solidified by cooling so as to be a resin sheath. The sheathed fibers are annealed by the heating chamber so that its residual stress is relieved.

Abstract: An optical fiber drop cable is provided with a neck portion in which an optical element section and a cable support section may be separated readily. The optical fiber drop cable 1 comprises the optical element section 9 including an optical fiber core wire 3, at least one pair of first tensile strength bodies 5 disposed in parallel to said optical fiber core wire in between, said optical fiber core wire and said first tensile strength bodies being covered with a cable sheath 7, and the cable support section 15 including a second tensile strength body 11 covered with a sheath 13, and the optical element section 9 and the cable support section 15 being fixed in parallel to each other via a neck portion 17. The neck portion 17 includes a thick part 25 formed on the cable support section 15 side and a thin part 23, which is thinner than the thick part 25, formed on the optical element section 9 side next to the thick part 25.

Abstract: An optical fiber drop cable includes an optical element portion having an optical fiber core wire and a pair of first tension members disposed parallel to the optical fiber core wire on both sides thereof in a sandwiching manner. The optical fiber core wire and the pair of first tension members are coated with a cable sheath. A long-scale cable support wire portion has a second tension member coated with a sheath. The optical element portion and the cable support wire portion are adhered parallel to each other. The first tension members are composed of a nonconductive material. A flexural rigidity of the optical element portion is in a range from 80 to 500 Nmm2.

Abstract: An optical fiber ribbon cord 10 comprising a plurality of tension fibers 13 juxtaposed along about an optical fiber ribbon 11 and a sheath 14 composed of a resin covering all the exteriors thereof, wherein at least one tape body 15 with higher Young's modulus than that of the sheath is inserted within the interior A of a side wall in the minor axis of the sheath.

Abstract: A cable wherein even when there is a substantial volume of cable identifying information for identifying the cable, all of that cable identifying information can be simply and speedily written-in. This cable has a cable core, an integrated member with a chain of RFIDs including a plurality of RFID elements arranged at suitable intervals along a longitudinal direction of the cable core, to and from which cable identifying information can be written-in and read-out by transmission of electromagnetic energy, and a transmission coaxial cable for collectively writing-in cable identifying information to all of the RFID elements.

Abstract: An optical fiber drop cable is provided with a neck portion in which an optical element section and a cable support section may be separated readily. The optical fiber drop cable 1 comprises the optical element section 9 including an optical fiber core wire 3, at least one pair of first tensile strength bodies 5 disposed in parallel to said optical fiber core wire in between, said optical fiber core wire and said first tensile strength bodies being covered with a cable sheath 7, and the cable support section 15 including a second tensile strength body 11 covered with a sheath 13, and the optical element section 9 and the cable support section 15 being fixed in parallel to each other via a neck portion 17. The neck portion 17 includes a thick part 25 formed on the cable support section 15 side and a thin part 23, which is thinner than the thick part 25, formed on the optical element section 9 side next to the thick part 25.

Abstract: An optical fiber cable including a slotted core (3) having a suitable number of slots (7) and identification members (25) disposed in a designated slot (7B) of the slots (7) for identifying cable information.

Abstract: An optical fiber drop cable is disclosed including an elongated optical element section composed of an optical fiber core wire and at least one pair of adjacent first tensile strength members, disposed on both sides of the optical fiber core wire in parallel thereto, which are covered with a cable sheath, and an elongated cable support wire section having a second tensile strength member covered with a sheath and adhered to the optical element section in parallel thereto. Since an outer periphery of the first tensile strength member is formed in a rugged configuration, an increased adhesive force is provided between the first tensile strength member and the cable sheath due to an anchoring effect of the rugged configuration.

Abstract: An optical drop cable includes an optical element portion having an optical fiber core wire and at least one pair of first tension bodies covered with a cable sheath. A support wire portion includes a second tension body covered with a sheath. Both portions are fixed together. The first tension bodies are composed of a flexible plastic material.

Abstract: Four twisted pairs 115 are forced to be brought into contact with a hollow filler 113 and collectively arranged around the hollow filler 113 so as to deform a contact portion into a concave form. The outer periphery of the four twisted pairs 115 collectively arranged is covered with a jacket 117 to form a data transmission cable 111.

Abstract: An optical fiber ribbon cord 10 comprising a plurality of tension fibers 13 juxtaposed along about an optical fiber ribbon 11 and a sheath 14 composed of a resin covering all the exteriors thereof, wherein at least one tape body 15 with higher Young's modulus than that of the sheath is inserted within the interior A of a side wall in the minor axis of the sheath.

Abstract: The manufacturing apparatus for optical fiber cord is provided with an extrusion machine, a cooling chamber, an intermediate pulling device, a heating chamber, a final pulling device, and a winding machine wherein the machines, the devices and the chambers are disposed in this order. One or more optical fiber cores and one or more reinforcing fibers are sheathed with thermoplastic resin by the extrusion machine. The thermoplastic resin is solidified by cooling so as to be a resin sheath. The sheathed fibers are annealed by the heating chamber so that its residual stress is relieved.

Abstract: The present invention is provided for obtaining an apparatus and a method for accurately measuring a variation of a distortion of an optical fiber by excluding an apparent variation of the distortion of the optical fiber which is generated by a drift of a BOTDR waveform. The distortion measuring apparatus of the present invention comprises a sensor cable and a reference fiber which is connected with the sensor cable in series. The measured variation of the distortion of the sensor cable is corrected by subtracting the apparent variation of the distortion of the reference fiber from the measured variation of the distortion of the sensor cable. It is preferable that the reference fiber be housed in an thermostatic chamber and temperature of the reference fiber be maintained in a predetermined value within a range of 10 to 40° C. with an error of ±2° C.

Abstract: An optical fiber drop cable 1 is disclosed including an elongated optical element section 7 composed of an optical fiber core wire 5 and at least one pair of adjacent first tensile strength members 13, disposed on both sides of the optical fiber core wire 5 in parallel thereto, which are covered with a cable sheath 3, and an elongated cable support wire section 11 having a second tensile strength member 17 covered with a sheath 19 and adhered to the optical element section 7 in parallel thereto. Since an outer periphery of the first tensile strength member 13 is formed in a rugged configuration, an increased adhesive force is provided between the first tensile strength member 13 and the cable sheath 3 due to an anchoring effect of the rugged configuration.

Abstract: A method for fabricating a drop cable includes the step of providing a strength member including a yarn including a non-conductive and tensile strength fiber. The method includes the step of arranging a core including an optical fiber side-by-side the strength member. The method includes the step of arranging a messenger wire side-by-side the core. The method includes the step of extruding the strength member, the core, and the messenger wire together for sheathing.

Abstract: Provided is an optical fiber drop cable, which protects an accident by lightning strike having also a low cost, and a manufacturing method thereof.

Abstract: The present invention is provided for obtaining an apparatus and a method for accurately measuring a variation of a distortion of an optical fiber by excluding an apparent variation of the distortion of the optical fiber which is generated by a drift of a BOTDR waveform. The distortion measuring apparatus of the present invention comprises a sensor cable and a reference fiber which is connected with the sensor cable in series. The measured variation of the distortion of the sensor cable is corrected by subtracting the apparent variation of the distortion of the reference fiber from the measured variation of the distortion of the sensor cable. It is preferable that the reference fiber be housed in an thermostatic chamber and temperature of the reference fiber be maintained in a predetermined value within a range of 10 to 40° C. with an error of ±2° C.

Abstract: An optical fiber drop cable including an optical element portion 3 having an optical fiber core wire 1 and a pair of first tension members A disposed parallel to the optical fiber core wire 1 on both sides thereof in a sandwiching manner, the optical fiber core wire 1 and the pair of first tension members A being coated with a cable sheath 21, and a long-scale cable support wire portion 4 having another second tension member B coated with a sheath 22, the optical element portion 3 and the cable support wire portion 4 being adhered parallel to each other, wherein the first tension members A are composed of a nonconductive material. A flexural rigidity of the optical element portion 3 is in a range from 80 to 500 Nmm2.