Sei Optifrontier Co., Ltd.

Sumitomo Electric Industries, Limited

Other

Hiroyasu Toyooka

Ryuichiro Sato

Hiroshi Nakamura

Masahiro Hasegawa

Hiroshi Takayanagi

Kensuke Ito

Toshihiko Homma

Kiyotaka Murashima

Koji Kashihara

Takayuki Suzuki

Kenichiro Ohtsuka

Yuji Suzuki

Junji Fukui

Atsushi Miura

Hisao Yui

Atsushi Takai

Teruaki Nishida

Keitaro Iwai

Yutaka Kotohda

A multi-core/single-core conversion module is disclosed. The multi-core/single-core conversion module includes a housing including a first end, a second end and a lateral wall defining an inner space between the first end and the second end, a first adapter attached to the first end of the housing, two or more second adapters attached to the second end of the housing, a multi-core optical connector inserted into the first adapter from the inner space of the housing, a plurality of single-core optical connectors respectively inserted into the second adapters from the inner space of the housing, and a plurality of optical fibers connecting the multi-core optical connector to the plurality of single-core optical connectors with each other. The second adapters are arranged on the second end across a plurality of tiers. An opening can be formed by a part of the lateral wall being detached.

Multi-core/single-core conversion module and multi-core/single-core conversion apparatus

A slider is attached to a cutter main body of an optical fiber cutter in a forward/backward movable state. A round blade member for making a scratch in an optical fiber is attached to the slider in a rotatable state. An operation lever pin for changing over rotation operation modes from one to another is attached to one end side of a pin member which penetrates a wall of the cutter main body. The rotation operation modes include a non-rotation mode for preventing the round blade member from being rotated and a continuous rotation mode for rotating the round blade member by a predetermined angle with every backward movement of the slider.

Optical fiber cutter

Optical fiber fusion splicer

A method of fusion-splicing includes attaching a stab to a stub cap having a non-axisymmetric structure, positioning an embedded optical fiber to a fusion splicing working part by fixing the stub cap thereto; positioning an outside optical fiber to the fusion splicing working part; fusion-splicing the embedded optical fiber and the outside optical fiber; repositioning the embedded optical fiber to a reinforcing working part by fixing the stub cap thereto and repositioning the outside optical fiber to the reinforcing working part such that a relative positional relationship between the embedded optical fiber and the outside optical fiber becomes the same as that at the fusion splicing working part; and reinforcing a spliced portion between the embedded optical fiber and the outside optical fiber while a tension is applied to the embedded optical fiber and the outside optical fiber.

Method of fusion-splicing optical fibers and fusion splicer

An optical fiber holder includes a holder main body and cord receiving groove. The holder main body has a fiber receiving groove and a first cord receiving groove. The fiber receiving groove receives and positions a coated optical fiber of an optical fiber cord with a cord jacket removed at the tip of the optical fiber cord. The cord receiving groove receives the cord jacket. A cord holding cover and a fiber pressing coverare attached to the holder main bodyfor movement between respective open closed positions. The cord holder cover includes a second cord receiving groove that cooperates with the first cord receiving groove to form an insertion through hole having a circular cross-section that allows for insertion of the optical fiber. The fiber pressing cover presses the coated optical fiber against the holder main body with the coated optical fiber in the fiber receiving groove.

Optical fiber holder and method for holding coated optical fiber

Carrying case for an optical fiber fusion splicer

A spliced optical cable assembly is reinforced at a spliced portion of coated optical fibers to have adequate strength. The spliced optical cable assembly includes: a pair of optical fiber cables in which high-strength fibers are aligned in the longitudinal direction around coated optical fibers. The outer circumference of the coated optical fibers being covered by sheaths. The spliced optical cable assembly further includes a connecting portion in which the pair of optical fiber cables are connected and the coated optical fibers extend from the sheaths. Glass fibers exposed from the coating of the coated optical fibers spliced to each other. The connected portion is covered and formed into an integral unit, together with the high-strength fibers exposed from the sheaths, by a reinforcing tube placed over the optical fiber cables and caused to contract so that both ends of the reinforcing tube engage the sheaths of the respective optical fiber cables.

Spliced optical cable assembly

Cutter blade assembly for an optical fiber cutter

Pushing part for an optical fiber cutter

The guide pin (P) in accordance with the present invention is a guide pin (P) having a predetermined pin diameter to be inserted into a guide pin insertion hole ( ) of a ferrule ( ); which is configured to have an inserting portion ( ) penetrating through the ferrule ( ), and an engagement portion ( ), having a diameter greater than that of the guide pin insertion hole ( ), adapted to abut against the back face ( ) of the ferrule ( ).

Guide pin for optical fiber connectors and optical fiber connector plug

An optical fiber connector at least comprising an optical fiber ferrule capable of fixing an optical fiber, and an optical fiber fixed in the optical fiber ferrule, a pair of the optical fiber connectors being used such that their respective end faces are opposed to each other to connect the optical fibers; wherein the core portion at the end of the optical fiber is recessed inwardly of the end face of the cladding, and the end face of the optical fiber is recessed inwardly of the end face of the ferrule; whereby reduction in variations is achieved in connection loss occurring depending on whether PC coupling takes place or not, and variations in connection loss associated with multiple reflection.

Optical fiber connector with non-PC-coupling

Growing community of inventors

Yokohama, Japan

Hiroyasu Toyooka