Fujikura Limited

Nippon Telegraph and Telephone Corporation

Toshiyuki Tanaka

Yasuhiro Tamaki

Hiroshi Yokosuka

Akito Nishimura

Yuichi Yoshida

Shinji Nagasawa

Takashi Tsumanuma

Kazuo Sanada

Mitsuru Kihara

Naoki Shamoto

Katsuyuki Seto

Kouji Tanaka

An optical fiber device,characterized in comprising a support mechanism,that supports an optical fiber connector,having components,with a two piece structure disposed one over the other and held against each other by a tension means, and at one end or the other end of which one or the other optical fibers,is inserted between said components, determining the alignment position so as to be able to connect optical fibers end to end, a separation member,releasing said optical fibers by spreading in the direction of separation of said components by opposing the tension of said tension means when inserted into said components from a direction straight along the longitudinal direction of said optical connector, and a push pressure device,which inserts said separation member between said components by applying pushing pressure in the direction of the optical connector to said seperator, and while applying end to end force to both optical fibers end to end in the component, closes the component, and clamps the optical fibers.

Optical fiber connection device and optical fiber connection method

Optical fiber connector

Productivity of switching optical connections is improved significantly with the mechanical splice presented. A single fiber cable or a fiber tape, with the bare fiber exposed at the tip, is inserted from the terminal ends of an aligner element, and are clamped between a lid and a base member of the aligner element, A U-shaped spring clamp is coupled to the aligner element to secure the cables clamped in the aligner element. After the aligner element is closed and coupled into the spring clamp, wedge insertion openings provided in the front face of the aligner element enable to lift the lid member from the base member sufficiently to enable removal of one or both of the cables. The mechanical splice is constructed simply and ruggedly so that cables can be connected or disconnected manually by coupling the aligner element into or decoupling from the spring clamp. The external shape of the aligner is angular, and permits stable handling on workbench or with tools, thus leading to improved productivity in field installation as well as in assembly operations.

Optical fiber mechanical splice

An image fiber preform for use in an image fiber according to the present invention includes a plurality of optical fiber strands, each optical fiber strand including a silica glass core which contains a dopant for increasing a refractive index of the core and a silica glass cladding surrounding the silica glass core, the silica glass cladding containing a fluorine dopant for decreasing a refractive index of the cladding, the cladding having an outer peripheral surface, and a quartz tube in which the optical fibers are closely arranged, wherein the cladding has a concentration of the fluorine dopant which decreases radially outward toward the outer peripheral surface of the cladding. in the present invention, an image fiber prepared from the image fiber preform and fabrication processes for the image fiber preform and the image fiber are provided.

Image fiber, image fiber preform, and manufacturing processes thereof

Growing community of inventors

Sakura, Japan

Toshiyuki Tanaka