Abstract: In a light radiation device including an upstream radiation portion, a middle radiation portion and a downstream radiation portion, the upstream radiation portion overlaps a nozzle array in a transportation direction. A controller includes a path controller to control a path operation of ejecting ink from the nozzle array onto a medium while moving a recording head and the light radiation device in a scanning direction, a transportation controller to control a transportation operation of, after the path operation, transporting the medium downstream in the transportation direction by a distance shorter than a length in the transportation direction of the nozzle array, and a first light radiation controller to control the light radiation device, during the path operation by the path controller, to turn on the upstream radiation portion and the downstream radiation portion and to turn off the middle radiation portion.

Abstract: A semiconductor optical device includes a substrate formed of silicon and having a first optical waveguide and a semiconductor element formed of a III-V compound semiconductor and having a second optical waveguide, the semiconductor element being bonded to an upper surface of the substrate. The first optical waveguide and the second optical waveguide form a directional coupler.

Abstract: An optical filter includes a first loop mirror, a second loop mirror, a first waveguide optically coupled to the first loop mirror and the second loop mirror, a second waveguide optically coupled to the first loop mirror and the second loop mirror, a first access waveguide optically coupled to the first waveguide, a second access waveguide optically coupled to the second waveguide, and an output section, wherein the first loop mirror includes a first loop waveguide and a first multiplexer/demultiplexer, the second loop mirror includes a second loop waveguide and a second multiplexer/demultiplexer, the output section includes a third loop waveguide, a third multiplexer/demultiplexer, a third waveguide, and a fourth waveguide, the third loop waveguide optically coupled to the second loop waveguide and the third multiplexer/demultiplexer, the third waveguide and the fourth waveguide optically coupled to the third multiplexer/demultiplexer, and the output section.

Abstract: An optical filter includes a first loop mirror, a second loop mirror, a first waveguide optically coupled to the first loop mirror and the second loop mirror, and a first access waveguide. The first loop mirror includes a first loop waveguide and a first multiplexer/demultiplexer. The second loop mirror includes a second loop waveguide and a second multiplexer/demultiplexer. The first loop waveguide is optically coupled to the first multiplexer/demultiplexer. The second loop waveguide is optically coupled to the second multiplexer/demultiplexer. The first waveguide is optically coupled to the first multiplexer/demultiplexer and the second multiplexer/demultiplexer. The first access waveguide is optically coupled to the first waveguide.

Abstract: An object of the present invention is to provide a multi-core optical fiber that can prevent an increase in bending loss even when a distance between a peripheral core and a cladding boundary is decreased, and can improve a bending loss characteristic in a state where an influence on a cutoff wavelength and a mode field diameter is small, and a design method thereof.

Abstract: A multicore fiber that includes: three or more cores that transmit in single-mode transmission; a common clad that covers a periphery of the three or more cores; and a low-refractive index portion that has a refractive index lower than a refractive index of the clad. The multicore fiber further includes a region having the three or more cores arranged annularly on a cross-section perpendicular to a longitudinal direction. At least a portion of the low-refractive index portion is arranged inside a minimum inscribed circle of two adjacent cores within the region.

Abstract: A multicore fiber includes: a first core configured to propagate an LP01 mode, an LP11 mode, and an LP21 mode light beam; and a second core configured to propagate an LP01 mode light beam, wherein a different mode interaction section is provided in which a propagation constant of the LP21 mode light beam propagated through the first core is matched with a propagation constant of the LP01 mode light beam propagated through the second core, a different mode non-interaction section is provided in which propagation constants of the LP mode light beams propagated through the first core are not matched with propagation constants of the LP mode light beams propagated through the second core, and the first core includes an inner core and an outer core surrounding the inner core with no gap and having a refractive index higher than a refractive index of the inner core.

Abstract: A multicore fiber includes: a center core that propagates four LP mode light beams including an LP02 mode light beam; and a first to a fifth cores disposed on a first line to a fifth line segments extend from the center of the center core in the radial direction at predetermined angles. The multicore fiber includes a different mode interaction section in which the propagation constants of each mode light beam propagated through the center core are matched with the propagation constants of LP01 mode light beams propagated through the first to fifth cores.

Abstract: A multicore fiber that includes: three or more cores that transmit in single-mode transmission; a common clad that covers a periphery of the three or more cores; and a low-refractive index portion that has a refractive index lower than a refractive index of the clad. The multicore fiber further includes a region having the three or more cores arranged annularly on a cross-section perpendicular to a longitudinal direction. At least a portion of the low-refractive index portion is arranged inside a minimum inscribed circle of two adjacent cores within the region.

Abstract: A multicore fiber including two or more cores each capable of single mode transmission, a cladding covering around the two or more cores in common, and a low refractive index portion having a refractive index lower than a refractive index of the cladding, wherein a cross-section perpendicular to a longitudinal direction includes a region where two or more cores of a part or all of the two or more cores are arranged in a circular shape and at least a part of the low refractive index portion is arranged inside an inscribed circle of the cores included in the region.

Abstract: A multicore fiber includes: a center core that propagates four LP mode light beams including an LP02 mode light beam; and a first to a fifth cores disposed on a first line to a fifth line segments extend from the center of the center core in the radial direction at predetermined angles. The multicore fiber includes a different mode interaction section in which the propagation constants of each mode light beam propagated through the center core are matched with the propagation constants of LP01 mode light beams propagated through the first to fifth cores.

Abstract: A multicore fiber includes: a first core configured to propagate an LP01 mode, an LP11 mode, and an LP21 mode light beam; and a second core configured to propagate an LP01 mode light beam, wherein a different mode interaction section is provided in which a propagation constant of the LP21 mode light beam propagated through the first core is matched with a propagation constant of the LP01 mode light beam propagated through the second core, a different mode non-interaction section is provided in which propagation constants of the LP mode light beams propagated through the first core are not matched with propagation constants of the LP mode light beams propagated through the second core, and the first core includes an inner core and an outer core surrounding the inner core with no gap and having a refractive index higher than a refractive index of the inner core.

Abstract: A multicore fiber including two or more cores each capable of single mode transmission, a cladding covering around the two or more cores in common, and a low refractive index portion having a refractive index lower than a refractive index of the cladding, wherein a cross-section perpendicular to a longitudinal direction includes a region where two or more cores of a part or all of the two or more cores are arranged in a circular shape and at least a part of the low refractive index portion is arranged inside an inscribed circle of the cores included in the region.

Abstract: A heat exchanger includes a shell; a pair of tube plates provided at both ends of the shell; a plurality of heat transfer tubes supported by the tube plates and housed in the shell; and a high-temperature fluid inlet connection for introducing a high-temperature fluid into the shell. A cooling jacket having a porous structure, over which a cooling fluid is to be spread, is provided on the interior surface of the high-temperature fluid inlet connection.

Abstract: A condenser 10 is disposed under a steam turbine 100 including a downward exhaust-type exhaust chamber. The condenser 10 includes: a condenser main body part 20; a connecting body part 30 connecting the exhaust chamber 122 and the condenser main body part 20 and having a pair of lateral sidewalls 31, 32 whose inner wall surfaces 31a, 32a are inclined more outward in terms of the perpendicular direction as they go more downstream; and a pair of plate-shaped members 40a, 40b, 41a, 41b which are provided on inner wall surfaces 35a, 36a of longitudinal sidewalls 35, 36, the pair of plate-shaped members 40a, 40b, 41a, 41b being located across a position of an inlet 33 of the connecting body part 30 and on more outer sides than the position of the inlet 33 in terms of the perpendicular direction, projecting in the turbine rotor axial direction, and extending downstream.

Abstract: The present invention provides expandable beads having an average particle size of 0.5 to 10 mm, a density of 0.033 to 0.80 g/cc, and a flame retardancy of V-0 or V-1 as measured according to the UL-94 vertical test (20 mm vertical burn test) in the UL standards.

Abstract: A condenser 10 is disposed under a steam turbine 100 including a downward exhaust-type exhaust chamber. The condenser 10 includes: a condenser main body part 20; a connecting body part 30 connecting the exhaust chamber 122 and the condenser main body part 20 and having a pair of lateral sidewalls 31, 32 whose inner wall surfaces 31a, 32a are inclined more outward in terms of the perpendicular direction as they go more downstream; and a pair of plate-shaped members 40a, 40b, 41a, 41b which are provided on inner wall surfaces 35a, 36a of longitudinal sidewalls 35, 36, the pair of plate-shaped members 40a, 40b, 41a, 41b being located across a position of an inlet 33 of the connecting body part 30 and on more outer sides than the position of the inlet 33 in terms of the perpendicular direction, projecting in the turbine rotor axial direction, and extending downstream.

Abstract: [Problem to be Solved] The present invention has an object to provide an automotive lamp extension molding comprising a resin composition having a low specific gravity, being excellent in the balance of heat resistance and fluidity, and being excellent in gloss and brightness feeling of the surface of the molded article. [Solution] The automotive lamp extension molding according to the present invention comprises a resin composition comprising 50 to 95 mass % of a polyphenylene ether (A), and having a specific gravity in the range of 1.00 to 1.12. The reduced viscosity (measured at 30° C. using a chloroform solvent) of the (A) component is preferably 0.25 to 0.45 dl/g, and more preferably 0.25 to 0.38 dl/g.

Abstract: [Problem to be Solved] The present invention has an object to provide an automotive lamp extension molding comprising a resin composition having a low specific gravity, being excellent in the balance of heat resistance and fluidity, and being excellent in gloss and brightness feeling of the surface of the molded article. [Solution] The automotive lamp extension molding according to the present invention comprises a resin composition comprising 50 to 95 mass % of a polyphenylene ether (A), and having a specific gravity in the range of 1.00 to 1.12. The reduced viscosity (measured at 30° C. using a chloroform solvent) of the (A) component is preferably 0.25 to 0.45 dl/g, and more preferably 0.25 to 0.38 dl/g.

Abstract: In one embodiment, a heat exchanger is provided with an inside shell, an outside shell, a cooling portion, and an inlet nozzle. The inside shell has an inside space for flowing a fluid, and an opening portion for outflowing the fluid from the inside space. The outside shell covers the inside shell to form a first passage between them to flow the fluid outflowing from the opening portion. The cooling portion is disposed within the inside shell to cool the fluid within the inside space. The inlet nozzle has an inner pipe, an outer pipe, and an outlet pipe. The inner pipe flows the fluid into the inside space through the outside shell. The outer pipe covers the inner pipe to form a second passage between them and has its one end connected to the outside shell to communicate the second passage with the first passage, and its other end connected to the inner pipe on the outside of the outside shell to seal the second passage to flow the fluid partly from the first passage to the second passage.