Abstract: An optical transmission medium bend working device that reduces bending loss of an optical transmission medium includes: an arc-discharge electrode that partially and sequentially heats a bend working area of a tape core wire in an up-down direction, the tape core wire extending in the up-down direction with a distal end thereof being located on a lower side, the bend working area being located above the distal end; a core wire holding unit that holds a portion of the tape core wire located above the bend working area; and a bending arm that applies force to the tape core wire in a state where the bend working area is heated to bend the tape core wire at the bend working area.

Abstract: An optical transmission medium bend working device that reduces bending loss of an optical transmission medium includes: an arc-discharge electrode that partially and sequentially heats a bend working area of a tape core wire in an up-down direction, the tape core wire extending in the up-down direction with a distal end thereof being located on a lower side, the bend working area being located above the distal end; a core wire holding unit that holds a portion of the tape core wire located above the bend working area; and a bending arm that applies force to the tape core wire in a state where the bend working area is heated to bend the tape core wire at the bend working area.

Abstract: There is provided a tape core wire manufacturing apparatus that makes it possible to manufacture a large variety of tape core wires in small quantities with ease, and in addition, makes it easy to apply a uniform coating over a broad width. In the tape core wire manufacturing apparatus of the present invention, a coating apparatus that applies a coating material to respective optical fiber core wires has a coating head that moves in the longitudinal direction relatively to the respective optical fiber core wires that have been placed in a row on a coating jig. The coating head has a position adjustment surface that is located in the vicinity of a coating member of the coating head and adjusts the positioning in the thickness direction of the respective optical fiber core wires when these are in the form of a tape. This position adjustment surface is pressed against the respective optical fiber core wires. The coating head is also able to be tilted in the longitudinal direction.

Abstract: An optical transmission medium shaping method and an optical transmission medium shaping apparatus can accurately adjust desire curvature radius without cracking the optical transmission medium. The optical transmission medium shaping method for bending an optical transmission medium using a transferring means and a noncontacting heating means, includes a transferring and heating process for heating part of the optical transmission medium by the noncontacting heating means while transferring the transferring means, and a bending process for bending the optical transmission medium.

Abstract: The present invention provides a process for producing an optical connector, an apparatus for producing the same, and a process for forming a polymer coating film on an end face of a fibrous dielectric, which can dispose a refractive index adjuster only onto an end face of an optical transmitting medium with excellent reproducibility. Such a process includes bringing an end surface of the optical transmitting medium close to an end face of a liquid refractive index adjuster, while charging at least one of the optical transmitting medium and the liquid refractive index adjuster, thereby adhering the liquid refractive index adjuster to the end face of the optical transmitting medium, and thereafter solidifying the adhered liquid refractive index adjuster to obtain the refractive index adjuster.

Abstract: There is provided a tape core wire manufacturing apparatus that makes it possible to manufacture a large variety of tape core wires in small quantities with ease, and in addition, makes it easy to apply a uniform coating over a broad width. In the tape core wire manufacturing apparatus of the present invention, a coating apparatus that applies a coating material to respective optical fiber core wires has a coating head that moves in the longitudinal direction relatively to the respective optical fiber core wires that have been placed in a row on a coating jig. The coating head has a position adjustment surface that is located in the vicinity of a coating member of the coating head and adjusts the positioning in the thickness direction of the respective optical fiber core wires when these are in the form of a tape. This position adjustment surface is pressed against the respective optical fiber core wires. The coating head is also able to be tilted in the longitudinal direction.

Abstract: There is provided a tape core wire manufacturing apparatus that makes it possible to manufacture a large variety of tape core wires in small quantities with ease, and in addition, makes it easy to apply a uniform coating over a broad width. In the tape core wire manufacturing apparatus of the present invention, a coating apparatus that applies a coating material to respective optical fiber core wires has a coating head that moves in the longitudinal direction relatively to the respective optical fiber core wires that have been placed in a row on a coating jig. The coating head has a position adjustment surface that is located in the vicinity of a coating member of the coating head and adjusts the positioning in the thickness direction of the respective optical fiber core wires when these are in the form of a tape. This position adjustment surface is pressed against the respective optical fiber core wires. The coating head is also able to be tilted in the longitudinal direction.

Abstract: An optical fiber connecting method not causing any damage to the optical fibers and enabling effective use of space and an optical fiber connection structure formed by the method. The optical fiber connection structure is for connecting optical fibers by means of a component for connecting optical fibers comprising two plugs for aligning at least two optical fibers and connecting them and an adapter for fixing the plugs. Each plug in which an optical fiber is inserted is attached to an adapter in the direction perpendicular to the axial direction of the optical fiber, and the plug and adapter are fixed. A modification may be made in which a latch member is provided to at least one of the plug and adapter, a latch engaging section is provided to the other, the latch member is engaged with the latch engaging section, and the plug and adapter are fixed.

Abstract: The present invention provides an optical fiber structure that allows for reliable and easy branching of optical fibers, as well as a method of manufacturing such optical fiber structure. The optical fiber structure proposed by the present invention is characterized by a structure wherein multiple optical fiber units, each comprising multiple optical fibers that are aligned two-dimensionally in such a way that one side is covered by a first covering body, are aligned so that the covered surfaces face the same direction, and the covered or uncovered surfaces of the multiple optical fiber units are integrally covered by a second covering body. The second covering body should preferably be made of silicone rubber having a tearing strength of 29 kgf/cm or below.

Abstract: An optical fiber tape core comprises an optical fiber core assembly and a coating layer formed of silicone rubber and arranged on at least one side of the optical fiber core assembly. In the optical fiber core assembly, plural optical fiber cores two-dimensionally are arranged in parallel with each other. The silicone rubber which forms the coating layer has a hardness of from 20 to 90 and a tensile strength of from 15 to 80 kgf/cm2.

Abstract: An optical connecting method for optically connecting ends of a first optical fiber and a second optical fiber secured side to a first plug and a second plug, respectively, wherein the first optical fiber and the second optical fiber are threaded through the first and second plugs, and respective optical fiber is secured to respective plugs with securing parts, a bending step of bending a part of at least one of the first optical fiber and the second optical fiber that is present ahead of the securing part, an aligning step of aligning the first optical fiber and the second optical fiber and fixing a relative position between the first and second plugs, and an abutting step of abutting the first optical fiber and the second optical fiber by releasing flexure of at least one of the first optical fiber and the second optical fiber.

Abstract: The present invention provides a process for producing an optical connector, an apparatus for producing the same, and a process for forming a polymer coating film on an end face of a fibrous dielectric, which can dispose a refractive index adjuster only onto an end face of an optical transmitting medium with excellent reproducibility. Such a process includes bringing an end surface of the optical transmitting medium close to an end face of a liquid refractive index adjuster, while charging at least one of the optical transmitting medium and the liquid refractive index adjuster, thereby adhering the liquid refractive index adjuster to the end face of the optical transmitting medium, and thereafter solidifying the adhered liquid refractive index adjuster to obtain the refractive index adjuster.

Abstract: The present invention provides a process for producing an optical connector, an apparatus for producing the same, and a process for forming a polymer coating film on an end face of a fibrous dielectric, which can dispose a refractive index adjuster only onto an end face of an optical transmitting medium with excellent reproducibility. Such a process includes bringing an end surface of the optical transmitting medium close to an end face of a liquid refractive index adjuster, while charging at least one of the optical transmitting medium and the liquid refractive index adjuster, thereby adhering the liquid refractive index adjuster to the end face of the optical transmitting medium, and thereafter solidifying the adhered liquid refractive index adjuster to obtain the refractive index adjuster.

Abstract: The present invention provides an optical connection structure and optical connection method for enabling a connection characterized by a simple structure, ability to retain optical fibers in an adhered state, easy installation and detachment/attachment, and excellent optical stability. The optical connection structure proposed by the present invention has a solid viscous connection member having refractive-index matching property disposed in a single layer state between the end faces of mutually opposing optical transmission media or between the end face of an optical transmission medium and an optical component that are mutually opposing. The solid viscous connection member should desirably be made of silicone resin or acrylic resin.

Abstract: An optical fiber coil and a production method therefor make it unnecessary for spaces between single fibers to be widened and for stress to be applied to the single fibers, and in which time and economic costs are low. In the optical fiber coil, an optical fiber ribbon is formed by arranging in parallel plural of single fibers and by integrally covering the single fibers with a covering portion, and ends of the ribbon are connected so that an end of at least one single fiber is connected to an end of another single fiber.

Abstract: An optical fiber tape core comprises an optical fiber core assembly and a coating layer formed of silicone rubber and arranged on at least one side of the optical fiber core assembly. In the optical fiber core assembly, plural optical fiber cores two-dimensionally are arranged in parallel with each other. The silicone rubber which forms the coating layer has a hardness of from 20 to 90 and a tensile strength of from 15 to 80 kgf/cm2.

Abstract: An optical fiber tape core comprises an optical fiber core assembly and a coating layer formed of silicone rubber and arranged on at least one side of the optical fiber core assembly. In the optical fiber core assembly, plural optical fiber cores two-dimensionally are arranged in parallel with each other. The silicone rubber which forms the coating layer has a hardness of from 20 to 90 and a tensile strength of from 15 to 80 kgf/cm2.

Abstract: The present invention provides a process for producing an optical connector, an apparatus for producing the same, and a process for forming a polymer coating film on an end face of a fibrous dielectric, which can dispose a refractive index adjuster only onto an end face of an optical transmitting medium with excellent reproducibility. Such a process includes bringing an end surface of the optical transmitting medium close to an end face of a liquid refractive index adjuster, while charging at least one of the optical transmitting medium and the liquid refractive index adjuster, thereby adhering the liquid refractive index adjuster to the end face of the optical transmitting medium, and thereafter solidifying the adhered liquid refractive index adjuster to obtain the refractive index adjuster.

Abstract: An optical fiber wiring sheet includes: at least one optical-fiber aligning section including a plurality of two-dimensionally aligned and wired coated optical fibers; and at least one optical-fiber branching part where at least one of the plurality of coated optical fibers branches off as a branching coated optical fiber from the remaining coated optical fibers. The coated optical fibers have ends which constitute optical input/output ports.