Abstract: Provided is a device for removing coating on an optical fiber. The device has a cutting depth limiting surface disposed on a receiver body and a cutting blade attached between a pusher body and a fixing block. The cutting blade is made from plastics and has a specified bending elasticity. An optical fiber is inserted between the cutting blade and the limiting surface. During operation, the cutting blade cuts into a covering on the optical fiber. A high precision in arranging the cutting blade is not required.

Abstract: An optical functioning component has a tubular housing with a front end side having substantially the same shape as that of a front end of a removable plug housing of an optical connector plug. A rear end side of the tubular housing has a shape configured for connection to the optical connector plug when the plug housing is removed from the optical connector plug. A ferrule is provided on the front end side of the tubular housing and has a mechanism capable of attenuating, cutting-off, reflecting or absorbing a specific wavelength of light. An optical connection sleeve is connected to an end of the ferrule. A frame supports the ferrule and the optical connection sleeve and is mounted in the tubular housing for undergoing axial movement therein by a preselected amount.

Abstract: This invention provides an optical fiber wiring board having excellent optical property, high reliability and high mounting property. This invention relates to an optical fiber component for connection having a substrate on which a plurality of optical fibers being wired, wherein a foam polymer layer is provided on a surface of the substrate wiring the optical fibers, or both on a surface of the substrate wiring the optical fibers and on a surface opposite to the surface of the substrate wiring the optical fibers, or so that whole of substrate is covered. The optical fiber component of the present invention may be further provided with a protective layer and may be filled with a filler. This invention provides also a manufacturing method of the optical fiber component for connection.

Abstract: An optical connector plug has a front housing 1, a rear housing 2, a ferrule 3, a coil spring 4 and an optical cord fixing member 5, and in addition to the ferrule 3 and the coil spring 4, the optical cord fixing member 5 for fixing a tension resistive member and a cord outer jacket is received and held within an internal through space defined when the front housing 1 and the rear housing 2 are coupled. Also, upon assembling the optical connector plug, assembling of these members 1 to 5 can be realized by movement in an axial direction as much as possible. Accordingly, assembling of the optical connector plug is facilitated and suitable for automatic assembling.

Abstract: Provided is a device for removing coating on an optical fiber. The device has a cutting depth limiting surface disposed on a receiver body and a cutting blade attached between a pusher body and a fixing block. The cutting blade is made from plastics and has a specified bending elasticity. An optical fiber is inserted between the cutting blade and the limiting surface. During operation, the cutting blade cuts into a covering on the optical fiber.

Abstract: A plug frame for an optical connector component comprising a ferrule for receiving an end portion of a core optical fiber of a fiber optic cable and a plug frame for floatingly supporting the ferrule. The plug frame is configured as a one-piece component. This allows reduction of the number of component parts and assembling steps, simplification of the assembling operations and reduction of the manufacturing cost.

Abstract: An optical functioning component in which strength is maintained while miniaturization is achieved and a number of parts can be decreased to reduce a cost is provided. In an optical functioning component including an attenuation ferrule provided on its front end side and having an attenuation mechanism, an optical connection sleeve for holding a rear end of the ferrule, a frame for holding the ferrule and the optical connection sleeve and a housing for holding the frame so that the frame can move axially and freely by a predetermined amount, a front end side of the housing has a roughly equal shape to a front end of a plug housing of an optical connector-plug connectable to an optical connector-adaptor engaged with the former front end side, and a rear end of the housing has a shape that the optical connector-plug with the plug housing removed can engage.

Abstract: An optical fiber ribbonizing apparatus is disclosed which arranges a plurality of optical fibers in parallel, applies a resin to peripheries of the plurality of optical fibers, and hardens the resin to form the optical fibers into a ribbon. The apparatus comprises a ribbonizing jig integrally including an optical fiber aligning mechanism for aligning the plurality of optical fibers in parallel, a resin applying mechanism for applying the resin to the optical fibers aligned by the fiber aligning mechanism and a resin hardening device for hardening the resin applied to the optical fibers by the resin applying mechanism, the optical fiber aligning mechanism, the resin applying mechanism and the resin hardening device being arranged in a line in an optical fiber inserting direction, and movement mechanism for moving at least one of the ribbonizing jig and the optical fibers in a predetermined direction relative to the other.

Abstract: Disclosed is an optical connector component 31 comprising a ferrule 2 for receiving an end portion of a core optical fiber of a fiber optic cable, a flange 32 mounted on the peripheral of the ferrule 2, and a one-piece plug frame 33 for floatingly supporting the ferrule 2 having the flange 32 mounted thereon. The flange 32 and the plug frame 33 are provided with respective engagement portions 37, 50 that are mutually engaged. The flange 32 has such resiliency that it is reduced in diameter by a radial and inward force exerted through the engagement portions 37, 50 when the ferrule 2 is inserted into the plug frame 33 from one end thereof and the flange 32 is restored to the original condition present before the insertion when the engagement portions 37, 50 are mutually engaged.

Abstract: An optical module capable of connecting signal lines to an external substrate easily without causing any degradation of the transmission characteristic is disclosed. The optical module comprises an optical element mounting block having an optical element mounting section and an optical fiber guide, and a wiring lead integrated resin substrate having a ferrule holding section, an optical element mounting block housing section, and wiring leads, where at least a part of the wiring leads are provided by signal lines in a coplanar guide structure entirely formed on the wiring lead integrated resin substrate such that a characteristic impedance does not change when the wiring leads are electrically connected to external wirings.

Abstract: An optical fiber connector has a stop ring having an end portion having an outer periphery and an optical fiber cable having a strength member extending from an end thereof. An adhesive material is disposed over the end portions of the stop ring and the optical fiber cable so that at least a portion of the strength member of the optical fiber cable is embedded in the adhesive material. A heat-shrinkable tube has an inner surface and is disposed on the adhesive material so that the portion of the strength member is disposed between the inner surface of the heat-shrinkable tube and the outer periphery of the stop ring.

Abstract: This invention provides an optical fiber wiring board having excellent optical property, high reliability and high mounting property. This invention relates to an optical fiber component for connection having a substrate on which a plurality of optical fibers being wired, wherein a foam polymer layer is provided on a surface of the substrate wiring the optical fibers, or both on a surface of the substrate wiring the optical fibers and on a surface opposite to the surface of the substrate wiring the optical fibers, or so that whole of substrate is covered. The optical fiber component of the present invention may be further provided with a protective layer and may be filled with a filler. This invention provides also a manufacturing method of the optical fiber component for connection.

Abstract: Disclosed is a plug frame 33 for an optical connector component 31 comprising a ferrule 2 for receiving an end portion of a core optical fiber of a fiber optic cable and a plug frame 33 for floatingly supporting the ferrule 2. According to the present invention the plug frame 33 is configured as a one-piece component. This allows reduction of the number of component parts and assembling steps, simplification of the assembling operations and reduction of the manufacturing cost.

Abstract: Disclosed is an optical connector component 31 comprising a ferrule 2 for receiving an end portion of a core optical fiber of a fiber optic cable, a flange 32 mounted on the peripheral of the ferrule 2, and a one-piece plug frame 33 for floatingly supporting the ferrule 2 having the flange 32 mounted thereon. The flange 32 and the plug frame 33 are provided with respective engagement portions 37, 50 that are mutually engaged. The flange 32 has such resiliency that it is reduced in diameter by a radial and inward force exerted through the engagement portions 37, 50 when the ferrule 2 is inserted into the plug frame 33 from one end thereof and the flange 32 is restored to the original condition present before the insertion when the engagement portions 37, 50 are mutually engaged.

Abstract: An optical connector plug has a front housing 1, a rear housing 2, a ferrule 3, a coil spring 4 and an optical cord fixing member 5, and in addition to the ferrule 3 and the coil spring 4, the optical cord fixing member 5 for fixing a tension resistive member and a cord outer jacket is received and held within an internal through space defined when the front housing 1 and the rear housing 2 are coupled. Also, upon assembling the optical connector plug, assembling of these members 1 to 5 can be realized by movement in an axial direction as much as possible. Accordingly, assembling of the optical connector plug is facilitated and suitable for automatic assembling.

Abstract: In a light waveguide circuit including a plurality of waveguides having different length, a material (10) having a temperature coefficient of a refractive index including a symbol different from that of a temperature coefficient of an effective refractive index of the waveguide (4) is charged into a groove (12) formed by removing the upper clad and the core from the waveguide (4), or a groove (12) formed by removing the upper clad, the core and the lower clad from the waveguide (4). A difference in length of the removed portions between adjacent waveguides is proportional to a difference in length of the waveguides which were not removed and remained.

Abstract: An optical module capable of connecting signal lines to an external substrate easily without causing any degradation of the transmission characteristic is disclosed. The optical module comprises an optical element mounting block having an optical element mounting section and an optical fiber guide, and a wiring lead integrated resin substrate having a ferrule holding section, an optical element mounting block housing section, and wiring leads, where at least a part of the wiring leads are provided by signal lines in a coplanar guide structure entirely formed on the wiring lead integrated resin substrate such that a characteristic impedance does not change when the wiring leads are electrically connected to external wirings.

Abstract: An optical fiber ribbon includes a plurality of optical fibers arranged in a row and an outer coating formed around the optical fibers. Each of the optical fibers has a core, a cladding, and a non-strippable thin coating made of synthetic resin with a Young's modulus of 50 kg/mm2 to 250 kg/mm2 at room temperature and coated around the cladding. The concentricity of the core to the diameter of the non-strippable thin coating is 1 &mgr;m or less.

Abstract: This invention comprises a multi-mode optical "T"-splitter for the coupling of multi-mode optical fibers to, from, and between other fibers, sources, detectors, and other optical elements, and method of fabricating same. The optical T-splitters of this invention may use tubular waveguides to provide a better match with round fibers, resulting in higher efficiency, lower loss, and other improvements. The optical T-splitter is comprised of waveguides forming a substantially T-shaped geometry in a substrate. A reflecting element is inserted at the junction of the "T" to split input light entering one of the legs of the "T" into light being output between the other two legs of the "T". The "T" configuration of these tubular channels and the insertion of various types of reflecting elements at the "T" junction, make it possible to perform any number of optical functions, including splitting, tapping, mixing, and coupling.

Abstract: This invention comprises an optical circuit for the coupling of multi-mode optical fibers to, from and between other fibers, sources, detectors, and other optical elements, and method of fabricating same. The optical circuits of this invention can have round waveguides to provide a better match with round fibers, resulting in higher efficiency, lower loss, and other improvements. A substrate having a relatively low index of refraction is either machined or molded such that semi-circular grooves are formed in substrate surfaces. When two such substrates are aligned and adhered together, tubular channels in a substrate result. The design and placement of these tubular channels can be such that any number of optical functions can be performed, including splitting, tapping, mixing, and coupling. The optical circuits of this invention are relatively easy to manufacture and inexpensive, and exhibit low propagation and coupling loss.