Fujikura Limited

Nippon Telegraph and Telephone Corporation

Nippon Telegraph and Telephone Public Corporation

Yasukuni Osato

Takeshi Yamada

Katsumi Sasaki

Okosu Watanabe

Hirohisa Suda

Osamu Kawata

Masao Suzuki

Koushi Ishihara

The optical fiber cutting apparatus are constituted by a combination of a cutting apparatus body in which two clamps and, a scoring blade and a pushing member are provided on predetermined positions on a base and a set table having a guide groove on its top is provided at the rear of these clamps and, and plural types of adapters, in which first guides and second guides having different sizes and shapes in accordance with the sizes and shapes of single core optical fibers in use are mounted on respective plates that can detachably be fit in the guide groove. With the above design, the desired adapter having the proper guides and can be selected and used in accordance with the size and shape of a single core fiber in use, so that the cutting apparatus can be applied to optical fibers with different sizes and shapes.

Method and apparatus for cutting an optical fiber

The optical fiber cutting apparatus are constituted by a combination of a cutting apparatus body in which two clamps and, a scoring blade and a pushing member are provided on predetermined positions on a base and a set table having a guide groove on its top is provided at the rear of these clamps and, and plural types of adapters, in which first guides and second guides having different sizes and shapes in accordance with the sizes and shapes of single core optical fibers in use are mounted on respective plates that can detachably be fit in the guide groove. With the above design, the desired adapted having the proper guides and can be selected and used in accordance with the size and shape of a single core fiber in use, so that the cutting apparatus can be applied to optical fibers with different sizes and shapes.

Method for cutting an optical fiber

The optical fiber cutting apparatus are constituted by a combination of a cutting apparatus body in which two clamps and, a scoring blade and a pushing member are provided on predetermined positions on a base and a set table having a guide groove on its top is provided at the rear of these clamps and, and plural types of adapters, in which first guides and second guides having different sizes and shapes in accordance with the sizes and shapes of single core optical fibers in use are mounted on respective plates tht can detachably be fit in the guide groove. With the above design, the desired adapter having the proper guides and can be selected and used in accordance with the size and shape of a single core fiber in use, so that the cutting apparatus can be applied to optical fibers with different sizes and shapes.

Disclosed is a method of fusion splicing single-mode optical fibers, in which an offset distance D, between the axes of the optical fibers subjected to fusion splicing, is measured when the axes of the cores of the optical fibers are aligned with one another. The arc discharge time, current and/or energy is determined according to the measured distance D.

Method of fusion splicing single-mode optical fibers using an arc

A pair of V-shaped slot blocks mounted movably on a base in both the X and Y directions and a microscope for observing the opposed state of optical fibers contained on the blocks, are provided in an apparatus for fusion splicing optical fibers. The microscope is mounted movably in the X and Y directions under a base, thereby observing the opposed states of the optical fibers from below.

Apparatus for fusion splicing optical fibers

A heater for heating a heat shrinkable tube fitted over an elongated member includes a base having an elongated support plate of a thermally conductive material for supporting the heat shrinkable tube on one surface thereof. The support plate has a heating portion at a central portion thereof. The heat shrinkable tube is adapted to be placed on the support plate along a length thereof with the opposite end portions of the tube disposed outwardly of the opposite ends of the heating portion, respectively. A heating element is disposed in contact with the other surface of the support portion and disposed in registry with the heating portion. The heating element is operable to first heat the heating portion and then the opposite end portions of the support portion extending outwardly from the opposite ends of the heating portion through heat transfer, so that the heat shrinkable tube is heat shrunk from its central portion toward the opposite ends thereof.

Growing community of inventors

Narashino, Japan

Yasukuni Osato