Sumitomo Electric Industries, Limited

Tetsu Morishima

Tetsuya Nakanishi

Jun Ito

Osamu Shimakawa

Hajime Arao

Yasuomi Kaneuchi

Takuji Nagashima

Naoki Matsushita

An optical fiber ribbon includes a plurality of optical fibers each including a glass fiber including a core and a cladding covering the core, and a resin coating covering the glass fiber, the plurality of optical fibers being arranged in parallel. In the optical fiber ribbon, a distance between central axes of adjacent optical fibers among the plurality of optical fibers in a direction orthogonal to a longitudinal direction of the plurality of optical fibers is larger than an outer diameter of each of the plurality of optical fibers.

Optical fiber ribbon, optical fiber connection component, and method for manufacturing optical fiber connection component

A method for manufacturing an optical fiber connecter includes preparing optical fiber including a glass fiber and a resin coating portion covering the glass fiber, mounting the optical fiber on a first optical fiber holder, adjusting an azimuth around a central axis for the optical fiber, bonding the glass fiber to the first optical fiber holder, mounting the glass fiber on a second optical fiber holder, bonding the glass fiber to the second optical fiber holder, and grinding end faces of the glass fiber and an the second optical fiber holder so that the end face of the glass fiber is flush with the end face of the second optical fiber holder.

Optical fiber connection component and method for manufacturing optical fiber connection component

Provided is a method for manufacturing an optical connector. The optical connector includes: an optical fiber including a glass fiber and a resin coating; and a ferrule including a through hole. The method for manufacturing includes: coating an inner wall of the through hole with a thermosetting resin; inserting the glass fiber exposed from the resin coating into the through hole; adjusting a mutual positional relationship between the optical fiber and the ferrule so that a distance between end surfaces of a tip of the glass fiber and a tip of the ferrule is equal to or less than 1 mm; rotationally aligning the glass fiber with respect to the ferrule; curing the thermosetting resin; and polishing the tip of the glass fiber and the tip of the ferrule.

Method for manufacturing optical connector

A method for estimating an orientation around a central axis of an optical fiber includes radiating light from a light source toward a side surface of the optical fiber, capturing an image of the side surface of the optical fiber by receiving the light transmitted through the optical fiber at a plurality of pixels disposed along a direction intersecting the central axis of the optical fiber, generating a luminance profile for the optical fiber based on a luminance value of light received by the plurality of pixels, and estimating an orientation around the central axis of the optical fiber using the luminance profile.

Method for estimating orientation of optical fiber and method for manufacturing optical-fiber component

This optical connector includes a ferrule, a plug frame, and an elastic member. The ferrule holds a glass fiber of an optical fiber. The plug frame receives the ferrule. The elastic member holds, with a first length, the ferrule in a first position in the plug frame, or holds, with a second length shorter than the first length, the ferrule in a second position in the plug frame. When the ferrule is in the first position, the ferrule and the plug frame are in contact with each other via the tapered surface, and the pivotal movement of the ferrule to the plug frame is restricted. When the ferrule is in the second position, the ferrule is not in contact with the plug frame and is pivotable to the plug frame, and the ferrule is in a floating state.

Optical connector and optical connection structure

An optical-fiber holding component disposed in a ferrule holding a plurality of optical fibers, which respectively have at least one core in a region shifted from a region on a center axis and are arranged in a first direction intersecting with the center axis line, is disclosed. The optical-fiber holding component comprises a holding part defining a position of each of coating removed portions in a plane perpendicular to the center axis and holding the coating removed portions, each of the coating removed portions being obtained by removing a resin coating by a predetermined length from a tip end of each of the optical fibers; and a fixing part arranged side by side with the holding part in a second direction along the center axis, resin coated portions of the optical fibers being fixed to the fixing part.

Optical-fiber holding component, optical connector, and optical coupling structure

A manufacturing method for manufacturing a multi-fiber connector, including: shaping a part of each of a plurality of optical fibers such that a part of an outer peripheral surface of a glass fiber including one end portion becomes a flat surface; arranging each of the plurality of optical fibers in a positioning component such that the entire flat surface protrudes from the positioning component; rotationally aligning each of the plurality of optical fibers such that the flat surface comes into contact with a reference surface of a jig; fixing each of the plurality of optical fibers to the positioning component; and cutting and removing a part of the glass fiber which protrudes from the positioning component and includes the flat surface and grinding a cut surface of each of the plurality of optical fibers which is exposed from the positioning component.

Manufacturing method for manufacturing multifiber connector and multi-fiber connector

An optical connector includes: an optical waveguide substrate including a plurality of core regions and a cladding layer covering the plurality of core regions; a first ferrule including a first housing portion that houses the optical waveguide substrate; a second ferrule facing the first ferrule and including a second housing portion that houses a multi-core optical fiber including a plurality of first cores and a first cladding covering the plurality of first cores; and a first positioning mechanism configured to determine a position of the second ferrule with respect to the first ferrule and fix the first ferrule and the second ferrule to each other such that the first ferrule and the second ferrule are separable from each other. The second ferrule is disposed such that each of the plurality of core regions is optically connected to a corresponding one of the plurality of first cores via a gap.

Optical connector for connecting multicore optical fiber to single core optical fibers using intermediate optical waveguide array

A method for manufacturing an optical connecting component includes the steps of inserting an optical fiber into one through hole of a plurality of through holes of a connector, rotating the optical fiber around an axis of the optical fiber in the one through hole and aligning and holding the optical fiber at a predetermined position, blocking the end part of a through hole adjacent to the one through hole into which the optical fiber is inserted with a jig on an end face of the connector provided with the plurality of through holes, and fixing the optical fiber to the connector in a state in which the end part of the adjacent through hole is blocked.

Method for manufacturing optical connecting component and jig used in this manufacturing method

An optical connector that requires fewer components and also has a simpler structure includes an optical fiber including a glass fiber and a resin coating surrounding the glass fiber; a ferrule having a flange outside the ferrule and a through-hole inside the ferrule, the ferrule holding, in the through-hole, a portion of the glass fiber exposed from the resin coating at an end of the optical fiber; a plug frame accommodating the ferrule; and an elastic member abutting the flange and biasing the ferrule. The flange has a flat surface on an outer periphery thereof, and the plug frame has a guide surface configured to unrotatably align the ferrule biased by the elastic member in contact with the flat surface of the flange. When the ferrule is moved in the direction opposite to the biasing direction, the flat surface is separated from the guide surface to bring the ferrule into a floating state relative to the plug frame.

The present embodiment relates to an optical connector capable of reducing a pressing force applied to each of a plurality of optical fibers simultaneously held by a ferrule and effectively reducing fiber damage. The optical connector includes a ferrule including a plurality of through holes and a plurality of optical fibers held by the ferrule with end faces of the optical fibers protruding from the ferrule. The maximum curvature of the end face of each of the optical fibers and a variation amount of a protrusion amount of each of the optical fibers are adjusted to enable excellent many-to-many PC connection.

Optical connector

An optical connector manufacturing method includes inserting a protrusion of a fixing jig into a positioning hole in an end face of a cladding of an optical fiber and restraining rotation of the optical fiber, the positioning hole extending in an optical axis direction, the optical fiber being inserted in a through hole in a connector ferrule and protruding from an end face of the connector ferrule; and securing the optical fiber to the connector ferrule, with the protrusion of the fixing jig inserted in the positioning hole.

Optical connector manufacturing method

An optical connector comprises a first optical waveguide including a plurality of cores each extending along a first direction, the first optical waveguide having a first end face, wherein the cores are arranged on the first end face at positions except a position of a central axis of the first optical waveguide, and a first lens having a second end face and a third end face in the first direction, the first lens having an optical axis extending along the first direction. The first optical waveguide and the first lens are arranged so that the central axis of the first optical waveguide coincides with the optical axis of the first lens. The second end face is positioned facing the first end face, and the third end face extends along a plane perpendicular to an optical axis of the first optical waveguide.

An optical connector includes an optical fiber including a glass fiber and a resin coating surrounding the glass fiber; a ferrule having a flange outside the ferrule and holding, inside the ferrule, a portion of the glass fiber exposed from the resin coating at an end of the optical fiber; a plug frame accommodating the ferrule; and an elastic member abutting the flange and biasing the ferrule forward in an optical axis direction of the optical fiber to retain the ferrule inside the plug frame. The flange and the plug frame have a protrusion and a recess that allow the flange and the plug frame to be fitted to each other at the predetermined position. When the ferrule is moved rearward in the optical axis direction, the protrusion and the recess are released from each other to bring the ferrule into a floating state relative to the plug frame.

Growing community of inventors

Osaka, Japan

Tetsu Morishima