Abstract: A connector-attached optical fiber cable comprises a multicore optical fiber, a first optical connector that is attached to a first end of the multicore optical fiber, and a second optical connector that is attached to a second end of the multicore optical fiber. When connection end surfaces of the first optical connector and the second optical connector are viewed with the upward directions of the connectors aligned, the arrangement from the first core to the Nth core in the connection end surface of the second optical connector is the arrangement obtained by inverting the arrangement from a first core to an Nth core in the connection end surface of the first optical connector about a center axis line of the multicore optical fiber in the connection end surface that is along the direction in which the upward directions are aligned.

Abstract: An optical fiber production method is a method for producing an optical fiber including a glass fiber, the method including: heating and melting an optical fiber preform by a heating furnace, and drawing the glass fiber; acquiring a lateral observation image of the glass fiber at an observation position; calculating a variable related to an azimuth angle about a central axis of the glass fiber based on the lateral observation image; and applying a rotation about the central axis to the glass fiber based on the variable.

Abstract: An optical connector includes: a ferrule which has a front end and a rear end that are opposite from each other in one direction and which has a boot insertion hole that is formed at the rear end and fiber holding holes that extend toward the front end from the boot insertion hole; a boot which has a through hole passing therethrough in the one direction and which is inserted into the boot insertion hole; and optical fibers which are inserted into the through hole, and which are respectively held by the fiber holding holes. An adhesive which fixes the optical fibers to the ferrule is provided to the inside of the ferrule. Provided to the boot is a seal member which is disposed so as to close a gap between the inner surface of the through hole and the optical fibers.

Abstract: A ferrule includes a ferrule body including a ferrule front end and a ferrule rear end, an introduction hole provided in the ferrule body, and a plurality of fiber insertion holes extending along the first direction from a portion of the introduction hole positioned near the ferrule front end to the ferrule front end. Each of the plurality of fiber insertion holes includes a tapered portion and a fiber holding portion communicating with the tapered portion and extending to the ferrule front end. The tapered portion includes a front end and a rear end. An angle between a centerline axis of each of the plurality of fiber insertion holes and a straight line connecting the front end and the rear end of the tapered portion in a cross section along the centerline axis is from 1 degree to 14 degrees.

Abstract: The optical fiber holding component that is fixed relative to the ferrule includes a first end surface and a second end surface, a plurality of through holes, a first flat surface, and a pair of projected corners. The first flat surface has a width equal to or less than a width of the ferrule flat surface, and a maximum width of the optical fiber holding component is larger than the width of the ferrule flat surface.

Abstract: An optical connection component enables rotational positioning of a ferrule while avoiding complication of a structure, and includes an optical connector and an adapter. The optical connector includes an optical fiber, a ferrule assembly having a ferrule and a holding portion with a flange, a housing, and an elastic member, and the adapter includes an alignment sleeve. In a state in which the optical connector and the adapter are not engaged with each other, the flange is biased by the elastic member to be rotatable about the ferrule's a central axis. In an axis misalignment state in which the ferrule's front end portion and the alignment sleeve are in contact with each other and the ferrule's outer peripheral surface is in contact with the housing's flat surface, the flange is biased by the elastic member.

Abstract: An optical connector ferrule disclosed herein includes: a front end face; a rear end face arranged side by side with the front end face in a first direction; an inner wall surface that is formed between the front end face and the rear end face, and that intersects in the first direction; an introduction hole that extends in the first direction from the rear end face to the inner wall surface, and can introduce, from the rear end face, a holding member for holding a plurality of optical fibers; and a plurality of insertion holes are arranged, and in which leading ends of the plurality of optical fibers protruding from an end face of the holding member can be inserted. Each of the plurality of insertion holes includes at least a holding portion that has a constant inner diameter capable of holding the leading ends of the optical fibers.

Abstract: An optical connector includes an optical fiber that includes a glass fiber and a resin coating portion, a ferrule that includes a ferrule main body holding the glass fiber and a flange portion fixed to the ferrule main body, a housing that accommodates the ferrule and includes an inner wall surface facing the ferrule, and an elastic member that is accommodated in the housing and applies an elastic force to the ferrule in a longitudinal direction of the housing. The housing is configured to have a space between the inner wall surface and the flange portion, and the housing is configured such that at least a part of the housing including the inner wall surface is deformed in a state where the housing is engaged with the adaptor, and the inner wall surface prevents rotation of the flange portion with respect to the housing.

Abstract: An optical connector in one embodiment includes an optical fiber, a ferrule assembly, and a housing. The housing has a positioning part defining an accommodation position of the ferrule assembly. The positioning part has an inclined surface with which a part of the ferrule assembly is to contact and the ferrule assembly includes a ferrule, a sleeve, and a flange. The sleeve includes a projection and the flange is disposed between the positioning part and the projection of the sleeve, and has a flange front surface including an edge contacting the inclined surface of the positioning part and a flange rear surface contacting or being close to the projection of the sleeve.

Abstract: One embodiment of the present disclosure relates to an optical fiber alignment method that enables highly accurate alignment of an optical fiber without applying a complicated driving system. The alignment method includes finely aligning the first and second optical fibers and finely aligning. Roughly aligning the first and second optical fibers based on a result of end-surface observation. Finely aligning the first and second optical fibers based on a result of side-surface observation in such a manner as to increase an optical coupling efficiency between each pair of the cores in the first and second optical fibers.

Abstract: An optical connector of one embodiment includes an optical fiber, a ferrule assembly, and a housing provided with a positioning part on an inner wall surface for suppressing a fluctuation in an aligning state of the optical fiber with respect to the housing. The positioning part includes an inclined surface and a facing surface which contact a part of the ferrule assembly. The ferrule assembly includes a ferrule, and a sleeve member. The sleeve member is constituted by a sleeve and a flange which has edges contacting the inclined surface and the facing surface respectively. Of an outer peripheral portion of the flange, a portion including the edges facing at least one of the inclined surface and the facing surface includes a set including a deformation absorbing part and two contact portions disposed on both sides of the deformation absorbing part.

Abstract: A method for manufacturing an optical fiber splicing component includes preparing 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, an end portion of the glass fiber being exposed from the resin coating, mounting the plurality of glass fibers on an optical fiber holding member so that the plurality of glass fibers exposed from the resin coating are arranged in a first direction and protrude outward from the optical fiber holding member, adjusting and fixing postures of the plurality of glass fibers around respective central axes, and collectively bonding two or more glass fibers among the plurality of glass fibers and the optical fiber holding member with an adhesive.

Abstract: An optical-fiber holding component according to the present disclosure is disposed inside a ferrule and holds a plurality of optical fibers, the optical-fiber holding component comprising: an outer surface including a first end surface and a second end surface that are arranged in a first direction; a plurality of through-holes that penetrates from the first end surface to the second end surface in the first direction and are arranged side by side in a second direction crossing the first direction; and at least one air discharge hole that extends from the outer surface so as to cross the plurality of through-holes.

Abstract: An optical fiber alignment method makes it possible to reduce the time required for alignment work for an optical fiber. This alignment method includes: an image acquisition step of acquiring an end surface image of an optical fiber; a measurement step of measuring arrangement data relating to a plurality of elements from the end surface image; a calculation step of calculating an amount of deviation of each of the plurality of elements from a target element arrangement from a correspondence relationship of the elements between the obtained arrangement data and reference arrangement data for element identification recorded in advance; and an alignment step of rotating the optical fiber around a central axis such that the obtained amount of deviation is reduced.

Abstract: An optical connector according to one embodiment of the present disclosure comprises: a plurality of optical fibers each having a coated part and a coating-removed part, and each having a core and/or a stress applying part at a position displaced from the central axis thereof; and a ferrule having a front end surface and a back end surface that are arranged in a first direction in which the central axis extends, and a plurality of fiber holding parts extending in the first direction between the front end surface and the back end surface and respectively holding the plurality of optical fibers while being arranged in a second direction crossing the first direction.

Abstract: 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.

Abstract: 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.

Abstract: An optical connector includes: an optical fiber; a ferrule assembly which has a holding portion that is provided with a ferrule and a flange; a housing which has an inner wall surface that defines an internal space in which the holding portion is housed, a reference surface that constitutes a portion of the inner wall surface, and a positioning part; and an elastic member which biases the flange toward the positioning part. The reference surface includes abutment portions which restrict the rotational orientation of the flange by being abutted against a portion of the outer peripheral surface of the flange and which are provided at two locations that are spaced from each other by a predetermined distance.

Abstract: An optical fiber holding component includes a first end surface and a second end surface that face each other in a first direction, a plurality of through holes into each of which a corresponding one of the plurality of optical fibers is insertable, the plurality of through holes extending between the first end surface and the second end surface through the optical fiber holding component in the first direction and being arranged side by side in a second direction intersecting the first direction, and a plurality of injection holes into which an adhesive configured to bond the plurality of optical fibers to the plurality of through holes is injectable, the plurality of injection holes extending in a direction intersecting the plurality of through holes and each being individually connected to a corresponding one of the plurality of through holes.

Abstract: This optical connector comprises a plurality of optical fibers, a plurality of ferrules, and a ferrule accommodating component that includes a plurality of accommodating portions and in which the plurality of accommodating portions are separated by a plurality of side walls and accommodate the plurality of ferrules one by one. Each of the ferrules includes a ferrule body and a flange. Each of the accommodating portions includes an accommodating wall surface that forms an accommodating space accommodating a ferrule and detachably fixes a ferrule. The accommodating wall surface includes an abutting portion that abuts against the flange. The accommodating wall surface and the flange are provided with angle determination mechanism configured to determine a rotation angle of the ferrule around a center axis with respect to the ferrule accommodating component.