Nippon Telegraph and Telephone Corporation

Other

Hajime Takemoto

Masao Tachikura

Shigenori Uruno

Isao Nakanishi

Nobuo Tomita

Tsuyoshi Shimomichi

Hisashi Izumita

Yoshitaka Enomoto

Keiji Oohashi

Naoki Nakao

Etsuo Ino

Koji Mine

Akira Hirooka

Tetsuo Hayano

Katuyoshi Ishida

Kazunaga Kobayashi

An optical fiber distribution module having a connection board, optical connector adaptors and a storage section is provided. An array of the optical connector adaptors forms the connection board, where the optical connectors connect in-use optical fibers. The storage section, located in a separate section of the module, stores optical fibers which are not-in use. The optical fiber distribution module also includes a plurality of cord sorting boards having a plurality of fiber cord passageways. The fiber cord passageways are configured to accommodate and retain at least one optical fiber such that the optical fiber is arranged between the connection board and the storage section. In addition, both the in-use and not-in use optical fibers insert into the fiber cord passageway. The in-use optical fibers connect to the optical connector adaptors and the not-in use optical fibers are stored in the storage section as the in-use optical fibers and the not-in use optical fibers are inserted within the fiber cord passageways.

Optical fiber distribution module for holding an optical fiber cord and fiber distribution system using optical fiber cords

Metal filaments such as steel wires which has Young's modulus of 10,000 kg/mm,are provided longitudinally on a UV curable resin coated optical fiber. A resin covering layer is then formed on a resultant structure by coating ultraviolet curing resin and then curing the resin, whereby resulting in an extremely small optical fiber cord having a finished diameter of about 250 &mgr;m.

Optical fiber cord, ribbon cord using the same and ribbon cord branch line

A mono-fiber type optical fiber cord comprising: a coated optical fiber which is an optical fiber with a fiber coat therearound, a synthetic resin coat having a substantially rectangular sectional surface for further covering the coated optical fiber, and a reinforcing member within the coat for coated optical fiber, wherein the reinforcing member is located along one of the shorter sides of the coat in the substantially parallel direction with the shorter sides in such a manner as to be embedded along the longitudinally extending direction of the coated optical fiber. An optical cord ribbon is formed by mutually bonding the longer sides of the adjacent substantially rectangular sectional surfaces of a plurality of the mono-fiber type optical fiber cords, and thereafter by coating the external surface of the thus aligned optical fiber cords by a bundling coating method.

Optical fiber cord and optical cord ribbon

Growing community of inventors

Tokyo, Japan

Hajime Takemoto