Abstract: The present invention relates to a connector for connecting optical fiber ribbons to each other, each of ribbons including a plurality of optical fibers spaced in line, and a method of attaching the same. The connector comprises an alignment member for placing the optical fibers in the grooves formed therein, a deformable metal member disposed on the optical fibers in the grooves of the alignment member, and a ferrule incorporated at the front end pportion with both the alignment member and the deformable metal member and adapted at the rear end portion to retain the unexposed portion of the optical fiber ribbon. Accordingly, the optical fibers are fixedly held between the alignment member and the deformable metal member while the ribbon is fixedly held by the rear end portion of the ferrule. The front ends of the optical fibers are cut at the front end of the ferrule.

Abstract: The present invention relates to a connector for optical fiber used as optical communication parts, in particular to a ferrule which is one member of a plug side of the connector, a pointed end portion of the ferrule being partially cut off, and the optical fiber being inserted and fixed into the ferrule, the terminal treatment of the optical fiber is practiced by injuring the circumferential surface of the pointed end portion of the optical fiber and by cleaving the pointed end portion of the optical fiber.

Abstract: This invention relates to a connector for optical fiber used for optical communication parts, especially to a plug of the connector, comprising an inner tube into which an endportion of an optical fiber cord, whose cover is peeled off, is inserted and which is formed with axial slittings; and an outer tube being fitted onto the inner tube and made of a solid material, the inner tube being reduced in diameter at the portion having the slittings, thereby fixing the optical fiber thereto.

Abstract: A connector for a high energy beam, which is provided with a sleeve fitted on an optical fiber and having an optical fiber support portion of an inner diameter about equal to a diameter of the optical fiber and a larger diameter portion positioned ahead of the optical fiber support portion and having an inner diameter larger than the diameter of the optical fiber so as to form a gap around the optical fiber and in a proper length from the end face of the optical fiber. The optical fiber support portion is formed of a heat resistant inorganic substance having a melting point of 1500.degree. C. or more, for example, a transparent substance, such as sapphire, or an opaque substance, such as aluminium oxide; the so-called fine ceramics. The connector of the present invention is free from burning, melting and diffusion of metallic material, and breakage of optical fiber when in use, thereby being easy to handle and high in quality and reliability and having a long life time.

Abstract: An optical fiber cable comprising a water blocking layer, an optical fiber disposed inside the water blocking layer and a water blocking material filling the space between the water blocking layer and the optical fiber, the water blocking material comprising a grease having a worked penetration of 85 to 475 as measured according to ASTM-D-712 at room temperature.

Abstract: An optical fiber cable comprising a water blocking layer, an optical fiber disposed inside the water blocking layer and a water blocking material filling the space between the water blocking layer and the optical fiber, the water blocking material having an apparent viscosity (as measured in accordance with JIS K 2220-1980, 5.15 at 40.degree. C., and a shear rate of 10 sec..sup.-1) of lower than 25,000 poise and also having a worked penetration (as measured in accordance with JIS K 2220-1980, 5.3 at 25.degree. C.) of 150 to 450.

Abstract: An optical fiber cable comprising a water blocking layer, an optical fiber disposed inside the water blocking layer and a water blocking material filling the space between the water blocking layer and the optical fiber, the water blocking material comprising a grease having a worked penetration of .[.85.]. .Iadd.300 .Iaddend.to 475 as measured according to ASTM-D-712 at room temperature.