Nippon Telegraph and Telephone Corporation

Japan Aviation Electronics Industry, Limited

Hirose Electric Company, Ltd.

Other

Fujikura Limited

Ntt Electronics Corporation

Yoshiteru Abe

Masaru Kobayashi

Ryo Koyama

Masaaki Takaya

Yuichi Koreeda

Chisato Fukai

Ryou Nagase

Masahiro Tsuchida

Kazunori Katayama

Kazuhide Nakajima

Yusuke Yamada

Ryo Nagase

Koichi Arishima

Akihiro Onogawa

Kiyoyuki Mutaguchi

Makoto Sanguu

Masahiro Yanagisawa

Toshikazu Hashimoto

Hiroshi Takahashi

Tsutomu Kitoh

Taiji Sakamoto

Ikuo Ogawa

Tomohiro Shibata

Senichi Suzuki

Shuichiro Asakawa

Takeshi Kitagawa

Takaharu Matsuda

Takaharu Ohyama

Masaki Koutoku

Yasunari Tanaka

Guan Huang

A fiber cutter includes: a gripping member that grips an optical fiber; a blade that forms an initial cut in the optical fiber gripped by the gripping member; and a bending part that applies a predetermined bending stress to the optical fiber when the blade forms the initial cut in the optical fiber.

Fiber cutter and fiber cutting method

For an optical monitor device that detects the intensity of light propagating through an optical fiber, a reduction in size and cost of the optical monitor device are to be achieved. The present disclosure provides an optical monitor device including: an optical component that branches an incoming light at a specific branching ratio and outputs the majority thereof in a specific direction and the rest thereof in another specific direction; a plurality of incoming-side optical fibers through which light is to propagate and that are two-dimensionally arranged to cause the light to enter the optical component; a plurality of outgoing-side optical fibers through which light is to propagate and that are arranged to receive the most outgoing light from the optical component; a light-receiving element located to receive a partial outgoing light from the optical component; an incoming-side lens located between the optical component and the incoming-side optical fibers and that causes the incoming light into the optical component to be a parallel light; and an outgoing-side lens located between the optical component and the outgoing-side optical fibers and that efficiently couples the outgoing light from the optical component to the outgoing-side optical fibers.

Optical monitor device

The present disclosure has an object to provide a multicore optical connector that can achieve size reduction and pitch reduction without performing highly accurate machining of V-grooves or the like. The present disclosure is a multicore optical connector including a holding memberhaving a flat bottom surfaceB, and provided with a groove that enables a plurality of optical fibersto be arranged along the bottom surfaceB, the plurality of optical fibersstored in a row on the bottom surface of the groove, and a lidthat is in contact with all the plurality of optical fibersand is fixed to the plurality of optical fibersand the holding memberin a state in which the plurality of optical fibersare pressed against the bottom surfaceB of the groove to form a long holeat the groove

Multi-fiber optical connector and optical fiber connection method

An object is to provide a multifiber optical connector and an optical cable connection method capable of reducing a connection time and reducing an installation space of a connection portion. The multifiber optical connector according to the present invention includes three position adjustment units, and performs rough alignment to fine alignment of optical fiber end faces by using sequentially these position adjustment units when optical cables are connected. The multifiber optical connector simultaneously connects the end faces of the plurality of optical fibers included in the optical cables, and thus, an extra optical fiber tape is not present, and a closure needed in the related art is not necessary.

Multifiber optical connector and optical cable connection method

An object is to provide an optical connector cleaning tool capable of cleaning both an end face and a side face of a ferrule of an optical connector plug simultaneously and simply and a method of cleaning an optical connector in such a manner. An optical connector cleaning tool according to the present invention includes superimposing a plurality of cleaning sheets on each other, the cleaning sheets each including a plurality of cleaning strings arranged so as to be parallel to each other in a sheet shape, such that orientations of the cleaning strings included in the respective cleaning sheets differ from each other, pressing an end face of a ferrule of an optical connector plug against the cleaning sheets to clean the end face of the ferrule, and subsequently, sticking the ferrule through the cleaning sheets to clean a side face of the ferrule.

Optical connector cleaning tool and optical connector cleaning method

To provide a connector plug that makes it possible to facilitate a plurality of persons' confirmation of a connector plug before its removal or after its insertion and to prevent erroneous work. The connector plug according to the present invention has a discoloration member mounted on a gripping portion for pinching during work. The color of the discoloration member changes due to heat of a worker's fingertips when the worker pinches the connector plug or pressure when the worker pinches the connector plug. The discoloration member is discolored by one worker pinching the connector plug. Another worker looks at the discolored discoloration member, and then is able to confirm whether the connector plug is a work target.

Connector plug, connector insertion method, and a connector removal method

An object is to provide an optical fiber connector ferrule, a sleeve, and a method for manufacturing a ferrule member that can avoid an increase in manufacturing time and an increase in cost of optical connectors for connecting multicore optical fibers. The present invention provides an optical fiber connector ferrule, a sleeve, and a method for manufacturing ferrule member which realizes alignment of multicore optical fibers corresponding to the connection by mounting a ferrule on a multicore fiber and then cutting a ferrule member instead of aligning core positions by rotating an axis of an optical fiber and adjusting positions of cores to the ferrule, leading to simplification of a rotational alignment step.

Optical connector ferrule, sleeve, and method for manufacturing ferrule member

A planar waveguide having M&#xd7;N number of cores and to which M number of fibers having N number of cores are connected. In the planar waveguide, in a connecting end surface of the planar waveguide to which the fibers are connected, P number of fibers having Q number of cores are connected, M&#xd7;N is equal to P&#xd7;Q, the planar waveguide includes a plurality of the cores arranged in a horizontal direction at the same height position in the planar waveguide, and a laminated structure having the cores at different positions in a height direction, so as to be aligned with the cores of the fibers connected to the connecting end surface, and the positions of the M&#xd7;N number of cores are constant in the height direction, and change only in the horizontal direction.

Multi-core fiber connector

An optical connector () of the present invention includes housing position correction means for correcting displacement of relative positions between plug and jack housings (); housing connection means () which engage with each other to connect the plug and jack housings () to each other so that a coupling state between first and second optical fibers () can be maintained; connection release means () capable of releasing the connected state by the housing connection means (); and frame position correction means for correcting displacement of relative positions between a frame () of an optical plug () and a connection block () of an optical jack ().

Optical connector

The head end surface of an optical fiber () and the head end surface of an optical fiber () are butted to each other in an alignment member () of an adapter (). In the butting, because one of the members clasping the optical fiber () is a plate () that is short, the optical fiber () is bent and buckled between the left end of the short plate and the right end of the alignment member. Members clasping the optical fiber () are a long plate () and a V-grooved base plate (), and the optical fiber () is therefore horizontally fixed between each of right ends of the long plate and of the V-grooved base plate () and the left end of the alignment member. This results that the head end surface of the optical fiber () and the head end surface of the optical fiber () are in tight contact with each other, achieving excellent optical transmission between both optical fibers.

A wave transmission medium includes an input port-and an output port-. A field distributionand a field distributionare obtained by numerical calculations. The field distributionis a field distribution of the propagation light (forward propagation light) launched into the input port-. The field distributionis a field distribution of the phase conjugate light (reverse propagation light) resulting from reversely transmitting from the output port side an output field that is expected to be output from the output port-when an optical signal is launched into the input port-. According to the field distributionsand, a spatial refractive index distribution is calculated such that the phase difference between the propagation light and reverse propagation light is eliminated at individual points (x, z) in the medium.

Wave transmission medium and waveguide circuit

In an optical connector for use in connecting an optical fiber, a shell member has an engaging portion. An internal member holds the optical fiber and is received in the shell member to be removable in a first direction. A stopper is engaged with the engaging portion in the first direction. A spring is engaged with the internal member and the stopper and urges the internal member towards a second direction opposite to the first direction. The shell member has a release operation portion for releasing the engaging portion from the stopper.

Optical connector which can be disassembled and disassembling tool suitable to disassemble the same

There is provided an optical connector device which prevents leakage of light until right before connectors are connected to each other and is small-sized by a reduction in space for housing shutters. The optical connector device is an optical connector device comprising a first optical connector and a second optical connector. When shutters for shutting out light from the optical connectors are collided with each other, the shutters move to positions where they do not shut out the light. Therefore, the first optical connector and the second optical connector are connected to each other. After moving, the shutter of the first optical connector and the shutter of the second optical connector are inserted into the second optical connector while remaining contacting each other.

Optical connector having shielding mechanism

An optical connector apparatus includes a first and a second optical connector which are optically connectable to each other. The first optical connector includes a first connector body, a first light shielding device fitted to the first connector body in a first fitting direction, and a first guide portion coupled to the first light shielding device to guide fitting of the first light shielding device to the first connector body. The first guide portion has a first dimension in the first fitting direction. The second optical connector includes a second connector body, a second light shielding device fitted to the second connector body in a second fitting direction, and a second guide portion coupled to the second light shielding device to guide fitting of the second light shielding device to the second connector body. The second guide portion has a second dimension in the second fitting direction. In the optical connector, the second dimension is determined greater than the first dimension.

Optical connector apparatus having a light shielding device of a simple structure

A disassembling tool includes a holding block having a housing portion for accommodating a plug connector, a slide block, and a handling part for sliding the slide block. The plug connector comprises an outer member and a plug frame and is accommodated in the housing portion of the holding block. When turning a handle of the handling part, the slide block is slidably moved so that projections provided on the slide block release the locking between locking portions of the outer member and locked portions of the plug frame. Following this, contact portions provided on the slide block come into contact with the plug frame so as to push it out of the outer member by a given amount.

Growing community of inventors

Tokyo, Japan

Yoshiteru Abe