Abstract: A measurement system includes a measurement device including a light source, and a first power meter, and one or a plurality of connection members each configured to optically connect a pair of optical fiber lines of the plurality of optical fiber lines. A first optical fiber line of the pair of optical fiber lines includes a first end and a second end, a second optical fiber line of the pair of optical fiber lines includes a third end and a fourth end, the one or plurality of connection members optically connect the second end to the fourth end, the light source causes testing light to be incident on the first end, and the first power meter measures first intensity of first output light output from the third end by causing the testing light to propagate through the pair of optical fiber lines.

Abstract: An optical connector includes a ferrule, a ferrule holder, a housing, and an anti-rotation structure. The ferrule includes a through hole that extends in a first direction and holds an optical fiber inside the through hole. The ferrule holder is disposed on the outer periphery of the ferrule and is fixed to the ferrule. The anti-rotation structure is provided inside the housing and outside the ferrule, and prevents rotation of the ferrule about an axis with the ferrule holder. The ferrule holder includes a tubular holder main body that accommodates the ferrule therein, and a flange part that protrudes outward from the outer periphery of the holder main body. The flange part includes a configuration to fit with the anti-rotation structure. A center of the flange part in the first direction is located in a central region of the ferrule in the first direction.

Abstract: An optical fiber ribbon includes a plurality of optical fiber cores arranged in parallel in a direction orthogonal to a longitudinal direction of the optical fiber cores, and a coupling member configured to couple the plurality of optical fiber cores. In the optical fiber ribbon, a plurality of coupled sections and a plurality of separate sections are alternately provided in the longitudinal direction. Each of the plurality of coupled sections is in a state in which all of the adjacent optical fiber cores are coupled by the coupling member. Each of the plurality of separate sections is in a state in which at least two of the optical fiber cores adjacent to each other are not coupled by the coupling member.

Abstract: A storage case including a fusion splicer accommodating portion, an optical fiber cutter accommodating portion, an optical fiber cutter holder, and a support portion. The fusion splicer accommodating portion includes a first placement surface. The optical fiber cutter holder has a second placement surface configured to fix a bottom surface of an optical fiber cutter, and is supported to be rotatable around a rotating shaft separated from a plane including the first placement surface. The support portion is disposed between the fusion splicer accommodating portion and the optical fiber cutter accommodating portion. The support portion is in contact with the optical fiber cutter holder which has rotated such that an angle formed by a line normal to the first placement surface and a line normal to the second placement surface is an acute angle, to support the optical fiber cutter holder.

Abstract: An optical connection structure including first optical fibers, second optical fibers, a first optical connector, and a second optical connector is disclosed. The first optical connector is configured such that each of first distal end portions of the first optical fibers protrudes from a first front end surface to the outside when the first optical connector and the second optical connector are connected to each other. Each of the first distal end portions is inserted into a corresponding second fiber hole of the second optical connector. The second optical connector is configured such that each of second distal end portions of the second optical fibers is moved rearward inside second fiber holes due to each of the first distal end portions respectively inserted into the second fiber holes. The first optical fibers and the second optical fibers are optically coupled to each other inside the second fiber holes.

Abstract: An optical connector including a ferrule, an outer housing, and a latch is disclosed. The ferrule holds an optical fiber at a front end of the optical connector. The outer housing is located closer to a rear end of the optical connector than the ferrule. The latch is connected to the outer housing and extends from a proximal end toward the front end of the optical connector. The latch includes an engaging part to engage with an external device at a distal end thereof. The latch is configured such that the engaging part is pushed down toward the ferrule. The engaging part includes an engaging main body and an engaging protrusion protruding outwardly from the engaging main body. The engaging protrusion includes an engaging surface to engage with the external device at a rear of the engaging protrusion, and an edge of the engaging surface is chamfered.

Abstract: An optical connection structure including first optical fibers, second optical fibers, a first optical connector, and a second optical connector is disclosed. The first optical connector is configured such that each of first distal end portions of the first optical fibers protrudes from a first front end surface to the outside when the first optical connector and the second optical connector are connected to each other. Each of the first distal end portions is inserted into a corresponding second fiber hole of the second optical connector. The second optical connector is configured such that each of second distal end portions of the second optical fibers is moved rearward inside second fiber holes due to each of the first distal end portions respectively inserted into the second fiber holes. The first optical fibers and the second optical fibers are optically coupled to each other inside the second fiber holes.

Abstract: A wiring module includes: a bottom plate; a module having two surfaces facing each other; a plurality of optical fibers, each of which is connected to the module via at least one of the surfaces of the module; and a plurality of reels which are sequentially stacked on an upper surface of the bottom plate, each of the plurality of reels accommodating a bundle of one corresponding optical fiber among the plurality of optical fibers. The module is disposed in a space formed inside the plurality of reels which are stacked.

Abstract: An optical wiring includes a plurality of first set groups each including a plurality of first connecting components, a plurality of second set groups each including a plurality of second connecting components, and a receptacle which has a first end face and a second end face on an opposite side of the first end face. The first set groups are connected to the first end face side and the second set groups are connected to the second end face side. The first set groups faces the second set groups through the receptacle such that a direction in which the first connecting components are arranged and a direction in which the second connecting components are arranged are perpendicular to each other, and each of the first connecting components is optically connected to a corresponding one of the second connecting components in the receptacle.

Abstract: A optical cable member includes an optical cable, a fixing member, a first housing tube, and a second housing tube. The optical cable includes an optical fiber and a tensile strength member. In the optical cable, a cable main body housing the optical fiber and the tensile strength member, and a cable exposure portion in which the optical fiber and the tensile strength member are exposed to an outside are provided. The fixing member fixes the tensile strength member. The first housing tube is disposed between the fixing member and the cable main body, houses the tensile strength member therein, and allows the optical fiber to extend therein. The second housing tube is disposed on a side opposite to the first housing tube of the fixing member, and houses the optical fiber of the cable exposure portion therein. The second housing tube is a bendable member.

Abstract: A fusion splicer includes an irradiation unit to irradiate an optical fiber with first wavelength light and second wavelength light; a light receiving unit; a processing unit to extract first feature data from first luminance information based on the first wavelength light and to extract second feature data from second luminance information based on the second wavelength light; a determination unit to determine whether the first feature data and the second feature data are within a predetermined range; and a drive unit to move one optical fiber on the basis of the luminance information from which the feature data is extracted so as to arrange the axes of the optical fibers in a predetermined positional relationship when the feature data is determined to be within the predetermined range. The processing unit extracts the second feature data when the first feature data is not within the predetermined range.

Abstract: A gain flattening filter includes a first optical fiber that has a core, a first cladding, and a second cladding and that has a uniform composition in a length direction; and a pair of second optical fibers fused to both ends of the first optical fiber. The first optical fiber has a first section in which a slanted refractive index grating is formed and a pair of second sections connecting both ends of the first section to the pair of second optical fibers. The first cladding contains a photosensitive material whose refractive index increases upon irradiation with light having a specific wavelength. In the core, a tensile stress remains in the first section. An average MFD of the second sections is larger than an average MFD of the second optical fibers and smaller than an average MFD of the first section.

Abstract: An optical connection structure including first optical fibers, second optical fibers, a first optical connector, and a second optical connector is disclosed. The first optical connector is configured such that each of first distal end portions of the first optical fibers protrudes from a first front end surface to the outside when the first optical connector and the second optical connector are connected to each other. Each of the first distal end portions is inserted into a corresponding second fiber hole of the second optical connector. The second optical connector is configured such that each of second distal end portions of the second optical fibers is moved rearward inside second fiber holes due to each of the first distal end portions respectively inserted into the second fiber holes. The first optical fibers and the second optical fibers are optically coupled to each other inside the second fiber holes.

Abstract: An optical connector includes first and second ferrules, first and second front housings each accommodating a corresponding ferrule of the first and second ferrules inside, an inner housing connected to rear ends of the first and second front housings, an outer housing including a first latch and accommodating the inner housing inside, and a tab disposed in a second direction intersecting a first direction with respect to the outer housing. The inner housing includes second latches disposed on first and second side portions respectively. The first and second side portions arranged in a third direction intersecting both the first direction and the second direction. The second latches include respective engaging portions that are engageable with the outer housing. Each of the engaging portions is pushed toward the inside of the inner housing to release a state of engagement between the inner housing and the outer housing.

Abstract: An optical connector has a front end and a rear end in a first direction. The optical connector includes a ferrule that holds an optical fiber at the front end, and a front housing that accommodates the ferrule. The ferrule includes a flange portion having a regular hexagonal prism shape. The front housing has a through-hole into which the flange portion is inserted. The through-hole includes a first hole portion in which a cross section perpendicular to the first direction is a regular hexagonal shape, and a second hole portion that is continuous from the first hole portion. The second hole portion has a third end close to the front end, and a fourth end close to the rear end. In a cross section of the fourth end perpendicular to the first direction, six contours corresponding respectively to six sides of the third end bulge outward or inward.

Abstract: In a fiber connection structure with optical connectors according to one embodiment, among m first connector port groups, arrangement orders of colors of a plurality of the optical fibers in (2×j?1)th (j is a natural number satisfying 1?j and 2×j?m) first connector port groups are the same, and among the m first connector port groups, arrangement orders of the colors of the plurality of optical fibers in (2×j)th first connector port groups are the same. The arrangement order of the colors of the plurality of optical fibers in the (2×j)th first connector port group is a reverse order of the arrangement order of the colors of the plurality of optical fibers in the (2×j?1)th first connector port group.

Abstract: A system for releasing locking of a fusion splicer includes a fusion splicer, an information terminal, and a server. The fusion splicer locks a fusion-splicing function in accordance with a predetermined lock condition and releases the locked function in accordance with a release command input. The server includes a storage unit that stores authentication information provided by a user of the fusion splicer, a collation unit that collates authentication information provided from the information terminal with the authentication information stored in the storage unit, and a password issuance unit that issues a one-time password including at least a date in an algorithm when a collation result is favorable. The information terminal authenticates the one-time password in consideration of a day difference or a time difference between the information terminal and the server and applies the release command to the fusion splicer when an authentication result is favorable.

Abstract: An optical cable termination unit includes a case, a first adapter panel that is disposed in the case and includes a plurality of first adapters each configured so that a corresponding one of a plurality of optical connectors is connectable thereto and disconnectable therefrom and a first surface on which the plurality of first adapters are arranged, and a second adapter panel that is disposed in the case and includes a plurality of second adapters each configured so that a corresponding one of a plurality of optical connectors is connectable thereto and disconnectable therefrom and a second surface on which the plurality of second adapters are arranged. The first and second surfaces are separated from each other. The first adapter panel is configured to be movable relative to the second adapter panel so that the first surface and the second surface are capable of becoming parallel to each other.

Abstract: An optical fiber ribbon includes a plurality of optical fiber cores arranged in parallel in a direction orthogonal to a longitudinal direction of the optical fiber cores, and a coupling member configured to couple the plurality of optical fiber cores. In the optical fiber ribbon, a plurality of coupled sections and a plurality of separate sections are alternately provided in the longitudinal direction. Each of the plurality of coupled sections is in a state in which all of the adjacent optical fiber cores are coupled by the coupling member. Each of the plurality of separate sections is in a state in which at least two of the optical fiber cores adjacent to each other are not coupled by the coupling member.