Abstract: An optical semiconductor device outputting a predetermined wavelength of laser light includes a quantum well active layer positioned between a p-type cladding layer and an n-type cladding layer in thickness direction. The optical semiconductor device includes a separate confinement heterostructure layer positioned between the quantum well active layer and the n-type cladding layer. The optical semiconductor device further includes an electric-field-distribution-control layer positioned between the separate confinement heterostructure layer and the n-type cladding layer and configured by at least two semiconductor layers having band gap energy greater than band gap energy of a barrier layer constituting the quantum well active layer. The optical semiconductor device is applied to a ridge-stripe type laser.

Abstract: A multicore fiber includes: a plurality of first linear portions including a first core portion, and a first cladding portion having a refractive index lower than a maximum refractive index of the first core portion, the first cladding portion surrounding an outer periphery of the first core portion; and a first tubular portion. The first linear portions are respectively joined to an inner wall of the first tubular portion, and two of the first linear portions are not in contact with each other in at least a portion in a longitudinal direction on a first virtual line connecting centers of two of the first core portions included in the two of the first linear portions, on a cross-section perpendicular to the longitudinal direction.

Abstract: A catalyst structure that allows prevention of aggregation of fine particles of a functional substance, suppresses decrease of catalyst activity, and thus enables extension of the lifetime of the catalyst structure. A catalyst structure has a carrier that is formed from a zeolite-type compound and has a porous structure. The functional substance includes a first element that is at least one metallic element selected from the group consisting of cobalt (Co), nickel (Ni), iron (Fe), and ruthenium (Ru), and at least one second element selected from the group consisting of metallic elements in group 1, group 2, group 4, group 7, and group 12 on the periodic table. The carrier has paths connected to each other. The functional substance is present in at least the paths of the carrier.

Abstract: An optical fiber includes: a core portion made of glass; and a cladding portion made of glass, having a refractive index lower than the refractive index of the core portion, and positioned on an outer periphery of the core portion. Further, the cladding portion has an outer diameter smaller than 100 ?m, and the core portion has a relative refractive-index difference of 0.32% to 0.40% with respect to the cladding portion.

Abstract: A sensing cable includes a first optical fiber, a second optical fiber that extends along the first optical fiber and that is spaced from the first optical fiber, and a transmitting material that includes an intervention portion present between the first optical fiber and the second optical fiber, the transmitting material being configured to transmit light from the first optical fiber to the second optical fiber through the intervention portion.

Abstract: An optical fiber includes: a core portion; and a cladding portion that has a refractive index lower than a maximum refractive index of the core portion and that surrounds an outer periphery of the core portion. The core portion includes a center core doped with germanium, and a low refractive index layer that surrounds an outer periphery of the center core, and in which ??max that is a minimum value of a relative refractive-index difference with respect to an average refractive index of the cladding portion is a negative value. A residual compressive stress in the center core is equal to or larger than 40 MPa and equal to or less than 150 MPa, and ?1 that is an average maximum relative refractive-index difference of the center core with respect to the average refractive index of the cladding portion is equal to or less than 0.8%.

Abstract: An adhesive composition containing: an epoxy resin (A) having a fused ring structure; an epoxy resin curing agent (B); a polyrotaxane compound (C); and a polymer component (D), wherein the polyrotaxane compound (C) is contained in a content of 5 to 15 parts by mass based on total 100 parts by mass of contents of the epoxy resin (A) and the polymer component (D); a film adhesive using the adhesive composition; and a semiconductor package and a producing method thereof.

Abstract: A heat sink including: a base portion to which a heat-generating element is thermally connected; a radiating fin provided on a front surface of the base portion; a heat pipe that is provided in an internal space of the base portion and stretches in a planar direction of the base portion; and a sealing member that is provided in the internal space of the base portion so as to face an end portion of the heat pipe in a longitudinal direction and seals the internal space of the base portion.

Abstract: A Ni—Ti-based alloy material includes a matrix phase consisting essentially of a Ni—Ti-based alloy and having a B2 type crystal structure. A nonmetallic inclusion is present in the matrix phase, in which 99% by mass or more of the nonmetallic inclusion is a TiC-based inclusion having a NaCl type crystal structure, the TiC-based inclusion has a lattice misfit (?) in a range of 0.4238 or more and 0.4259 or less. The lattice misfit (?) is represented by Expression ?=(a1?a2)/a2, where a1 is a lattice constant (?) of the TiC-based inclusion and a2 is a lattice constant (?) of the matrix phase.

Abstract: An optical module includes: a substrate and a waveguide element having a mount face opposed to the substrate, the waveguide element having an interference waveguide portion having an optical interference function. Further, the mount face includes a projection region to which the interference waveguide portion is projected on the mount face and a non-projection region, and the waveguide element is joined to the substrate with a joint material in the non-projection region.

Abstract: Provided is a power cable and a method for manufacturing a power cable that reduces occurrence of uneven thickness of an insulating layer and voids and peeling due to shrinkage and has good dielectric breakdown strength. The power cable includes the insulating layer containing 15 mass % or more of a propylene-based resin having a melting point of 110° C. or higher with respect to a whole. The power cable further includes a relationship between a cooling rate X [° C./min] at the time of manufacturing an interface portion in the insulating layer with the inner semiconductive layer and a cooling rate Y [° C./min] at the time of manufacturing a central portion of the insulating layer and is expressed by the relationship (Z), wherein X?Y×0.8 . . . (Z).

Abstract: A harness-side connector includes a retaining portion main body having a harness-side terminal disposed therein, a shell main body, a harness insertion cylinder and a harness insertion outer cylinder. A retainer outserted over a portion, of a high-voltage electric wire that is inserted into the harness insertion cylinder and the harness insertion outer cylinder, to be secured is provided. The retainer includes a retainer securing portion inserted into the harness insertion outer cylinder to be secured, and an electric wire retaining portion protruding from the harness insertion outer cylinder and retaining the high-voltage electric wire. The electric wire retaining portion includes a securing-side retaining portion integrally formed with the retainer securing portion, and an attachment retaining portion attached to the securing-side retaining portion.

Abstract: An optical functional device includes: first and second optical couplers each including a multi-mode interferometer waveguide portion having a first end portion and a second end portion, two units of first input/output ports and two units of second input/output ports; and first and second arc-shaped waveguides each optically connecting one of the first and second input/output ports of the first and second optical coupler and one of the first and second input/output ports of the second optical coupler, respectively. Further, the first optical coupler, the second optical coupler, the first arc-shaped waveguide, and the second arc-shaped waveguide constitute a ring resonator, and each of the multi-mode waveguide portions of the first optical coupler and the second optical coupler have a narrow portion, an average width of the narrow portion in a longitudinal direction being narrower than widths at the first end portion and the second end portion.

Abstract: A rechargeable battery short-circuit early detection device that detects a short-circuit in a rechargeable battery includes one or more processors connected to a current sensor that detects a charging current of the rechargeable battery, wherein the one or more processors are programmed to: if a detected temporal slope of the charging current exceeds a first threshold, determine that there is a possibility that a short circuit has occurred in at least one of the cells; detect anew a temporal slope of the charging current after a prescribed period of time has elapsed since the determination of said possibility; and thereafter, if the anew detected temporal slope of the charging current exceeds a second threshold that is greater than the first threshold, determine that there is a possibility that the short-circuit is progressing, and output a signal indicating said possibility.

Abstract: A cooling device that can reduce heat resistance by improving a heat exchange action of a condensation tube, and can exhibit excellent cooling characteristics, and a cooling system using the cooling device are provided. The cooling device includes a container to which at least one heating element is thermally connected, a primary refrigerant sealed inside the container, a condensation tube through which a secondary refrigerant flows and which penetrates through a gaseous phase portion inside the container, and a porous member provided at an outer surface of the condensation tube.

Abstract: A feeding fiber cable collectively extracts laser light generated by each of a plurality of fiber laser engines. A processing head converges and emits laser light to a workpiece. A process fiber cable transmits the laser light extracted by the feeding fiber cable to the processing head. The core diameter of the feeding fiber cable and that of the process fiber cable are equal and 50 ?m. The plurality of fiber laser engines each have a filter that reduces a value of Raman scattered light in the laser light.

Abstract: An optical apparatus includes: a housing including a first member constituting at least a part of the housing; an optical component accommodated in the housing and configured to transmit or reflect light; and a second member fixed to the first member and including at least one opening configured to accommodate a part of the optical component, the second member being configured to support the optical component via an adhesive agent.

Abstract: The heat sink includes a heat transport member having an evaporation portion to be thermally connected to a heat-generating element, a tube body which is connected to a connection portion located in a condensation portion of the heat transport member, and a heat radiation fin group which is thermally connected to the tube body, in which the heat transport member has an integral internal space, the internal space of the heat transport member communicates with an internal space of the tube body via the connection portion, the tube body has a circular portion in which a shape in a radial direction is a circular shape, and a flat portion in which a shape in the radial direction is a flat shape, the circular portion is located in the connection portion, and the flat portion is located in a part to which the heat radiation fin group is thermally connected.

Abstract: A female terminal, a female connector, a terminal-attached electric wire, a connector-attached electric wire, and a wire harness can prevent a welded portion from being damaged when a conductor of an electric wire is connected by ultrasonic welding to an electric wire connection portion of a female terminal with a base portion and a spring member welded together. A female terminal includes an electric wire connection portion with a conductor of an electric wire connected by ultrasonic welding, and a terminal connection portion with a male terminal connected. The terminal connection portion includes a base portion having a pair of side walls with a connection blade of a male terminal inserted therebetween, and a spring member attached to the base portion, the spring member includes a laying plate along the side walls and an arm spring, the side walls and the laying plate are welded at an endless welded portion.

Abstract: For the purpose of efficiently converting a beam profile of laser light with a simple configuration, provided is a beam profile converter including: a first optical fiber that outputs guided light from a first end surface; and a second optical fiber being a multi-mode optical fiber to which the light is input to a second end surface and configured to guide the light, in which a core diameter of the second optical fiber is larger than a core diameter of the first optical fiber at the first end surface, and the light output from the first end surface is input to a core portion of the second end surface at a position separated from an optical axis of the second optical fiber in a direction inclined with respect to the second end surface.