Fujikura Limited

Other

Nippon Telegraph and Telephone Corporation

Yasuhiro Tamaki

Hiroshi Yokosuka

Kazuhiro Takizawa

Toru Arikawa

Yukio Hayashi

Shinji Nagasawa

Toshiyuki Tanaka

Kunihiko Fujiwara

Akito Nishimura

Masaaki Takaya

Daigo Saito

Yoshikazu Nomura

Yuichi Yoshida

Kazuo Hogari

Tsuyoshi Shimomichi

Hideyuki Hosoya

Mitsuru Kihara

Shin-ichi Furukawa

Tadashi Hattori

Tsuyoshi Simomichi

Yasunari Tsuruta

Natsuka Imazu

Akito Nishumura

Koji Koshiyama

Mariko Asano

Tetsuo Nozawa

Koki Narita

Yoshihiro Ouchi

The invention is an optical fiber sheet obtained by adhering together at least two sheets with an optical fiber placed therebetween, and placing a reinforcing tube over a portion of the optical fiber extending from an edge of the sheets, wherein the reinforcing tube is fixed to the sheets by bonding, with the reinforcing tube inserted between the sheets located up and below by an appropriate distance from an edge of the sheets.

Optical fiber sheet and optical fiber sheet production method

In order to avoid a frequent multiple crossing in an optical fiber in a sheet and attach the optical connector near a marginal end of the sheet while maintaining a sufficient extra length and more extra length for attaching the optical fibers, in the optical fiber sheet, an optical fiberas an extra length section in the optical fiber path is disposed on three-layer wiring planes which are formed by attaching four sheets, and. Notched sectionsandare formed in the intermediate layersand. The optical fibercommunicates from a first wiring layer to a second wiring layer via the notched sectionso as to communicate from the second wiring layer to a third wiring layer via the notched section

Multilayer optical fiber sheet, optical fiber sheet fabricating method, and optical fiber sheet

An optical ferrule is disclosed in which a concave portionhaving a gate G in resin molding disposed therein is formed in a ferrule body. According to this constitution, it is possible to easily cut a flashleft after a gate of the concave portionof the ferrule bodyis cut after molding with a gate cutter, so that, when the ferrule bodyis fitted in a housing of an MPO connector and the like, the problem that the flashprotrudes from the concave portionand the flashhitching to an inner wall of the housing dose not occur. Accordingly, the labor required for removing the flashby polishing can be eliminated, and hence productivity of the ferrule bodycan be improved. Thus, a large number of ferrule bodiescan be automatically manufactured without requiring much manpower.

Optical ferrule and molding method therefor, and optical connector using this optical ferrule

An optical connector ferrule has an optical fiber containing hole reaching from the rear end surface near the end surface and a fine pore extending from the optical fiber accommodating hole to the end surface to be connected. A bare fiber of a polarization-maintaining optical fiber is inserted into the fine pore. Since the length of the fine pore is short, the influence of the uniformness of the adhesive in the fine pore is smaller, and therefore the stress distribution is maintained, resulting in stabilizing the polarization characteristics. A flange unit is attached to the ferrule after an optical fiber is inserted to the ferrule and fixed. Therefore the optical fiber is easily adjusted with respect to the housing in the circumferential direction around the axis, and optical fibers are connected by but joining with high accuracy.

Optical connector and assembling method for the same

The present invention is applied to a structure in which to attach a backplane connector to a backplane so that the backplane connector can be moved by a desired amount, a clip from which a pair of elastic pawls project is used to engage the backplane with the backplane connector through holes in the backplane. The present invention allows the clip of this structure to be removed efficiently. That is, the present invention provides a clip removing tool comprising disengaging pieces and that push in a pair of elastic pawls through an attaching slot in a backplane the elastic pawls being engaged with locking portions on opposite side portions of a BH housing are pushed, to disengage the elastic pawls from the locking portions as well as a clip removing method using this clip removing tool.

Clip removing tool and clip removing method

Optical connector

A closure for cable connection which is capable of preventing deformation thereof, facilitating incorporation and setting of a cable therein, exhibiting increased safety and airtightness, and attaining sleeve assembling and cable connection with improved workability. A sleeve is provided therein with a cable connection mechanism including a cable clamp, a tension member holder, and a fiber cable storage casing in which a fiber connection section of cable fibers and an excessive fiber are received. The sleeve is provided on upper and lower portions of an inner surface thereof with connection fitment mounting sections, on which a frame-like connection fitment for mounting the cable connection mechanism thereon is detachably fittedly fixed.

Closure for cable connection

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

Development of a multiple-core optical connector which can make multiple-core or a plurality of optical fibers connected in a simple manner has been sought. There are provided an optical connector ferrule for internally fixing beforehand the optical fibers arranged in parallel on an identical plane and having joining end surface of a tip which is polished, and an optical connector which is furnished with a connecting mechanism for maintaining a connected state by holding aforementioned optical connector which protrudes from the rear end, facing the aforementioned joining end surface of the aforementioned connector ferrule and a separate optical fiber connected by abutting against the optical fiber of the optical connector ferrule side.

An optical connector is provided where an biasing device,which biases a ferrule,having an optical fiber,secured thereinside and a tip end face,which has been polished, in a tip end face,direction, is located to the rear of a connection mechanism,for connecting the optical fiber,on the ferrule,side and a separately inserted optical fiber,at a rear end side of the ferrule,opposite to the front end face,The connection mechanism,has a construction which uses a mechanical splice, and is opened and closed by a release member inserted into an insertion opening,which is opened along an alignment axis direction. Hence the opening and closing operation does not interfere with the biasing device,so that operability is improved. Moreover, for this type optical connector there is provided an optical connector housing,which accommodates the ferrule. With this optical connector housing,by merely inserting the ferrule, the connection mechanism,for connecting the pair for optical fibers at the rear end side of the ferrule, and the stop ring,accommodating the connection mechanism,then assembly can be simply performed so that workability in assembling the optical connector is improved.

Optical connector and housing for optical connector

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

Growing community of inventors

Sakura, Japan

Yasuhiro Tamaki