Abstract: A cable accommodating body includes one or more cable bundles made of a wound cable and not having any winding core and one or more first containers accommodating the one or more cable bundles and having a first outlet and a second outlet through each of which the wound cable is pulled out from an inside of the one or more first containers.

Abstract: A digital phase shifter of the present invention is a digital phase shifter in which digital phase shift circuits are cascade-connected, each of the digital phase shift circuits including a signal line, a pair of inner lines provided on both sides of the signal line, a pair of outer lines provided on outer sides of the inner lines, a first ground conductor connected to one ends of the inner lines and one ends of the outer lines, a second ground conductor connected to the other ends of the outer lines, and a pair of electronic switches provided between the other ends of the inner lines and the second ground conductor. The digital phase shift circuits include a multi-row structure constituted by a front row and a rear row, the front row and the rear row are adjacent to each other, and the ground pattern is connected to the front row at one point.

Abstract: A digital phase shift circuit includes: a signal line that extends in a predetermined direction; a first inner line that is separated from a first side of the signal line; a second inner line that is separated from a second side of the signal line; an outer line that is provided at a position which is farther from the signal line than the first inner line or the second inner line on a first side or a second side; a first grounding conductor that is provided at each of first ends of the first inner line, the second inner line, and the outer line; a second grounding conductor that is provided at a second end of the outer line; a first electronic switch that is provided between a second end of the first inner line and the second grounding conductor; and a second electronic switch that is provided between a second end of the second inner line and the second grounding conductor.

Abstract: A pulling terminal structure includes: a braided tube that includes a pulling part; a housing tube disposed inside the braided tube and that houses an optical connector; and a reinforcement member disposed inside the braided tube and that reinforces an end part of the housing tube.

Abstract: An optical fiber cutter includes: a fiber holder that holds optical fibers disposed in a row in a first perpendicular direction perpendicular to a longitudinal direction of the optical fibers, wherein each of the optical fibers includes a glass portion and a coated portion that covers the glass portion; an alignment member having an insertion hole through which the glass portions extending from the fiber holder are inserted; a base including; a first placement portion on which the fiber holder is disposed; and a second placement portion positioned at a distance from the first placement portion, and on which the alignment member is disposed; and a blade member that scratches surfaces of the glass portions by moving in the first perpendicular direction between the first placement portion and the second placement portion with respect to the base.

Abstract: An optical fiber pitch conversion jig for converting a pitch among optical fibers by inserting the optical fibers from a first end of the optical fiber pitch conversion jig and making the optical fibers protrude from a second end of the optical fiber pitch conversion jig, the optical fiber pitch conversion jig includes: a groove portion including grooves extending from the first end to the second end, a first linear part on a side closer to the first end and in which a pitch among the grooves is a first pitch, and a pitch change part that is continuous with the first linear part and in which the pitch widens to a second pitch larger than the first pitch. In the pitch change part, at least one of the grooves is curved.

Abstract: An optical cable structure includes connector-equipped optical fibers, derived from an end portion of a sheath of an optical cable, that are accommodated in a tubular member. Each of the connector-equipped optical fibers includes a derivation optical fiber from the end portion of the sheath and an optical connector disposed at a distal portion of the derivation optical fiber. Lengths of at least some of the derivation optical fibers are different from each other. Each of the derivation optical fibers includes a proximal-side optical fiber on an end portion side of the sheath, a distal-side optical fiber on an optical connector side, and a connecting portion connecting the proximal-side optical fiber to the distal-side optical fiber. The connecting portions are disposed in the tubular member when the connector-equipped optical fibers are accommodated in the tubular member.

Abstract: A laser module includes an optical fiber, a laser device, an optical system, a housing, a lead terminal, a conductive wire, and an insulation member. The laser device emits a laser beam. The optical system couples the laser beam, emitted from the laser device, to the optical fiber. The housing includes a base plate on which the laser device is fixed and a side wall that includes an opening. The lead terminal extends from an outside of the housing through the opening of the side wall into the housing. The conductive wire electrically connects a connecting portion of the lead terminal, located within the housing, to the laser device. The insulation member includes a seal portion and an extension portion.

Abstract: A pull-end attachment structure includes a cable having an optical fiber, a cylindrical dam case and fixed to the cable so as to surround the cable, a cylindrical member to which a pull-hose configured to accommodate an end portion of the optical fiber is attached and which is provided so as to surround an outer circumferential surface of the dam case, and a cylindrical fixing member provided so as to surround the cable and capable of fixing to the cylindrical member, in which an outer diameter of the fixing member is equal to or less than an outer diameter of the cylindrical member, and a contacting surface is formed on an inner circumferential surface of the fixing member, the contacting surface that contacts the dam case and transfers a pulling force to the dam case when the cylindrical member and the fixing member are pulled through the pull-hose.

Abstract: An optical cable includes one or more tension members, optical fibers disposed around an outer periphery of the one or more tension members, and an outer sheath housing the one or more tension members and the optical fibers. A boundary elongation of the one or more tension members is smaller than a boundary elongation of the optical fibers. The boundary elongation of the one or more tension members and the boundary elongation of the optical fibers is a cable elongation corresponding to a boundary between an initial elongation region and an elastic region.

Abstract: A digital phase shift circuit includes: a basic phase shift circuit including a signal line, a pair of inner lines provided on both sides of the signal line, a pair of outer lines provided outside of the inner lines, a first grounding conductor connected to one ends of the pair of inner lines and the pair of outer lines, a second grounding conductor connected to the other ends of the pair of outer lines, and a pair of electronic switches provided between the other ends of the pair of inner lines and the second grounding conductor; and an output circuit configured to decrease an output load of the basic phase shift circuit in comparison with an input load thereof.

Abstract: A method includes inputting, via a first position adjustment optical structure, adjustment signal light into a second position adjustment optical structure. A first light diffraction element of an optical computing device includes a first computing optical structure constituted by microcells, and the first position adjustment optical structure. A second light diffraction element of the optical computing device includes a second computing optical structure constituted by microcells, and the second position adjustment optical structure. The method includes adjusting, based on the adjustment signal light outputted from the second position adjustment optical structure, a position of the second light diffraction element with respect to the first light diffraction element.

Abstract: An optical phase modulator includes a block constituting a magnetic free layer and having a first face, a second face opposite to the first face, an entrance face different from the first face or the second face and through which light enters, and an exit face different from the first face or the second face and through which light exits. The optical phase modulator includes a first electrode disposed to the first face, either directly or not directly on the first face.

Abstract: An optical fiber ribbon includes optical fibers disposed in a disposition direction perpendicular to a longitudinal direction of the optical fiber ribbon and connection parts each disposed between and connecting two or more of the optical fibers adjacent in the disposition direction. The connection parts are disposed intermittently in the longitudinal direction and the disposition direction. The optical fiber ribbon has a first high-density region and a low-density region adjacent in the longitudinal direction. Two or more of the connection parts, having different positions from each other in the longitudinal direction and the disposition direction, are disposed in the first high-density region. A number density of the connection parts in the low-density region is lower than a number density of the connection parts in the first high-density region.

Abstract: A light diffraction element unit includes a light diffraction element including a substrate having a first main surface and a second main surface and a light diffraction structure composed of microcells and disposed on the first main surface, a first light-transmissive coating layer that covers the first main surface, and a second light-transmissive coating layer that covers the second main surface. A shape of a main surface of the first light-transmissive coating layer and a shape of a main surfaces of the second light-transmissive coating layer are complementary to each other. The main surface of the first light-transmissive coating layer is disposed opposite one side of the substrate. The main surface of the second light-transmissive coating layer is disposed opposite another side of the substrate.

Abstract: A method for manufacturing an optical fiber includes: gripping a preform by a gripper that includes an aligner; forming a bare fiber by melting the preform in a melting furnace; cooling the bare fiber by blowing gas in a cooler; applying a resin and coating an outer circumference of the bare fiber; curing the resin; acquiring input information that changes a flow rate of the gas blown to the bare fiber in the cooler; and adjusting based on the input information an entry position of the bare fiber into the cooler by controlling the aligner and moving the preform.

Abstract: A ferrule holding structure includes a ferrule into which an optical fiber is inserted from a rear end of the ferrule to a connection surface at a front end of the ferrule and that holds the optical fiber, a biasing member that biases the ferrule in a forward direction from the rear end toward the connection surface, a housing that accommodates the biasing member and at least a part of the ferrule, and a support member that engages with the housing and that supports a rear end side of the biasing member. The support member includes a guide portion that guides the support member into the housing in an intersecting direction and a pressing face that presses the biasing member in the forward direction along with a movement of the support member in the intersecting direction to a position where the support member engages with the housing.

Abstract: A digital phase shifter includes a bend-type connection portion configured to connect a first digital phase shift circuit located at an end of a first digital phase shift circuit group and a second digital phase shift circuit located at an end of a second digital phase shift circuit group and include a third digital phase shift circuit. A capacitor is connected in parallel to at least one of a first connection line of a first connection portion, a first connection line of a second connection portion, a region in a vicinity of a connection position between two digital phase shift circuits constituting a first digital phase circuit group, and a region in a vicinity of a connection position between two adjacent digital phase shift circuits constituting a second digital phase circuit group.

Abstract: An optical fiber cable including an optical fiber ribbon in a pipe, wherein the ribbon includes at least two optical fibers arranged side by side, and wherein at least two of the optical fibers are bonded intermittently along a length of the fibers.

Abstract: A ferrule holding structure includes an optical fiber, a ferrule into which the optical fiber is inserted from a rear end of the ferrule to a connection surface at a front end of the ferrule and that holds the optical fiber, a biasing member biasing the ferrule in a forward direction from the rear end toward the connection surface, a housing accommodating the biasing member and at least a part of the ferrule, a support member engaged with the housing and supporting a rear end side of the biasing member, and a rotation mechanism, structured with a part of the support member and a part of the housing, that rotatably attaches the support member to the housing. The support member includes a pressing surface that presses the biasing member in the forward direction along with a rotation of the support member with respect to the housing.