Abstract: A light receiving device includes a substrate, a first contact layer disposed on a surface of the substrate, a light receiving layer disposed on the first contact layer, an intermediate layer disposed on the light receiving layer, a wide-gap layer having a pn junction disposed on the intermediate layer, a second contact layer disposed on the wide-gap layer, and a groove formed for pixel isolation by removing the second contact layer and part of the wide-gap layer, wherein the intermediate layer has a wider band gap than the light receiving layer, and wherein the wide-gap layer has a wider band gap than the intermediate layer.

Abstract: Provided is an optical fiber manufacturing method that uses a low-cost large optical fiber preform having high precision. The optical fiber manufacturing method includes at least a positioning step of positioning core rods in a hollow carbon pipe that contains carbon as a main component, a soot preform preparation step of filling a gap between the carbon pipe and the core rods with silica powder that contains SiO2 as a main component, thereby producing a soot preform, a consolidating step of introducing the soot preform into a furnace and consolidating the silica powder, thereby producing a transparent intermediate preform from the soot preform, an extraction step of extracting the transparent intermediate preform from the carbon pipe, and a drawing step of drawing the transparent intermediate preform, thereby manufacturing an optical fiber.

Abstract: A communication control device used in an on-vehicle communication system including an out-of-vehicle communication device being one of a plurality of function units provided in a vehicle and being capable of communicating with an external device outside the vehicle, and a switching device being capable of relaying communication data from one of the function units to another one of the function units, comprises: an acquisition unit that acquires status information indicating a status of a queue for storing in the switching device at least communication data from the out-of-vehicle communication device; and a control unit that determines restriction of transmission of communication data from the external device to the out-of-vehicle communication device based on the status information acquired by the acquisition unit.

Abstract: A surface-coated cutting tool includes a substrate and a coating formed on a surface of the substrate, the coating including one or two or more layers, at least one of the layers being an Al-rich layer including hard particles, the hard particle having a sodium chloride type crystal structure, and including a first unit phase in a form of a plurality of lumps and a second unit phase interposed between the lumps of the first unit phase, the first unit phase being composed of a nitride or carbonitride of AlxTi1-x, the first unit phase having an atomic ratio x of Al of 0.7 or more and 0.96 or less, the second unit phase being composed of a nitride or carbonitride of AlyTi1-y, the second unit phase having an atomic ratio y of Al exceeding 0.5 and less than 0.7.

Abstract: A silicon carbide epitaxial substrate includes a silicon carbide single crystal substrate and a silicon carbide layer. In a direction parallel to a central region, a ratio of a standard deviation of a carrier concentration of the silicon carbide layer to an average value of the carrier concentration of the silicon carbide layer is less than 5%. The average value of the carrier concentration is more than or equal to 1×1014 cm?3 and less than or equal to 5×1016 cm?3. In the direction parallel to the central region, a ratio of a standard deviation of a thickness of the silicon carbide layer to an average value of the thickness of the silicon carbide layer is less than 5%. The central region has an arithmetic mean roughness (Sa) of less than or equal to 1 nm. The central region has a haze of less than or equal to 50.

Abstract: One embodiment of the present disclosure relates to an optical fiber having lower transmission loss. The optical fiber is an optical fiber comprised of silica-based glass and includes a core including a central axis and a cladding. The cladding surrounds the core and has a refractive index lower than a refractive index of the core. The core contains phosphorus, chlorine, and fluorine. The core further includes an alkali metal element or an alkaline earth metal element. In a cross section of the optical fiber orthogonal to the central axis, a ratio Rp/Ra of a radius Rp of a phosphorus-containing region with respect to a radius Ra of the core is 0.3 or more.

Abstract: A coil includes a tubular winding portion formed by winding a wire, wherein the winding portion includes two coil recessed portions that are provided such that recessed directions toward an inner space surrounded by an inner peripheral face of the winding portion are opposite to each other.

Abstract: A voltage detection unit includes a wire in which a conductive core wire is coated with an insulating coating that is insulative, a terminal connection portion to be connected to an electrode terminal, a core wire connection portion of a connecting piece that is provided continuously with the terminal connection portion and connected to the core wire that is exposed from the insulating coating at a terminal of the wire, and a second coating holding portion that is provided side by side with the core wire connection portion in an extending direction of the wire and holds the insulating coating of the wire, and the wire arranged between the core wire connection portion and the second coating holding portion includes a fuse portion in which a diameter of the core wire is reduced in a state of being exposed from the insulating coating.

Abstract: An MCF according to the disclosure has a structure preventing deterioration in quality of optical transmission signals. The MCF comprises cores, a common cladding, and a coating. Any of the cores has a coating leakage loss of 0.01 dB/km or more at a wavelength within a wavelength range of from 850 nm to 1700 nm. The coating includes a leaked light propagation suppressive coating layer having a first optical property or a second optical property to light with a wavelength within a wavelength range of from 850 nm to 1700 nm or from 1260 nm to 1625 nm. The first optical property is defined by, as an attenuation index of the light, an absorbance per 1 ?m thickness being 0.1 dB or more. The second optical property is defined by a product of absorbance per 1 ?m thickness and a thickness being 0.1 dB or more.

Abstract: A method for quality evaluation includes emitting measurement light having a wavelength of 300 nm or more and 2,000 nm or less to a cell mass and acquiring a plurality of light intensity information corresponding to each of a plurality of measuring positions in the cell mass, generating a feature amount from a variation of the acquired plurality of light intensity information, and evaluating quality of the cell mass using the generated feature amount as an index.

Abstract: A wavelength-tunable light source includes a wavelength-tunable laser including a first region and a second region each of which includes at least one of heaters, a frequency locker configured to receive output light of the wavelength-tunable laser and output two electric control signals whose phases are mutually different by 90° and having frequency period with respect to frequency of the output light, a thermal electric cooler on which the wavelength-tunable laser and the frequency locker are mounted, and a controller configured to control temperature of the heaters, and the thermal electric cooler on the basis of any one of the two electric control signals.

Abstract: A demand monitoring device which monitors an amount of electric power received by a consumer includes: a prediction unit predicting, every demand period, received electric power in the object demand period on the basis of at least one of demand electric power, generated electric power, and received electric power at a time previous to the demand period, a known schedule of the consumer in the demand period, and weather information; a creation unit creating a graph showing an amount of electric power received by the consumer until a current time, a predicted value for an amount of received electric power from the current time onward, the predicted value being predicted by the prediction unit, and a target electric power amount based on contract electric power of the consumer; and a display control unit displaying the graph created by the creation unit, on a screen of a display device.

Abstract: A wire harness routing device has a wire harness, one end of which is connected to a slider that is slidably attached to a rail and the other end of which is drawn out from the rail, a folding guide part that curves the wire harness that is drawn out from the rail and folds it in the direction along the rail, and an accommodation part that has a bottom wall and a side wall that rises up from the side edges of the bottom wall. The wire harness has a straight line-shaped linear part that is disposed along the rail, and a curved part that is further folded back to conform to the opposed side of the folding guide part of the linear part, a slidable holding member, and a separation guide part that separates the linear part from the side wall is provided on the slidable holding member.

Abstract: A driving circuit includes a plurality of differential amplifier circuits each electrically connected to a power supply line. Each differential amplifier circuit includes a differential pair circuit and a series resistance circuit. In the differential pair circuit, a first transistor and a second transistor are electrically connected to the power supply line through a first load resistor and a second load resistor, respectively. A center node is electrically connected between the first transistor and the second transistor. Each differential amplifier circuit generates a differential output signal in accordance with a differential incoming signal. The series resistance circuit includes a resistor and a line element. The line element includes a signal line which extends straight with a distance between the signal line and a ground line extending in parallel thereto. The resistor and the line element are connected in series between the center node and a static potential line.

Abstract: A voltage detection unit includes a wire in which a conductive core wire is coated with an insulating coating that is insulative, a terminal connection portion to be connected to an electrode terminal, a core wire connection portion of a connecting piece that is provided continuously with the terminal connection portion and connected to the core wire that is exposed from the insulating coating at a terminal of the wire, and a second coating holding portion that is provided side by side with the core wire connection portion in an extending direction of the wire and holds the insulating coating of the wire, and the wire arranged between the core wire connection portion and the second coating holding portion includes a fuse portion in which a diameter of the core wire is reduced in a state of being exposed from the insulating coating.

Abstract: An object is to provide, for example, an optical wavelength conversion device capable of highly efficient wavelength conversion on the surface of, or inside, the main body of any of various shapes, such as a bulky shape and a fiber shape. The optical wavelength conversion device includes a main body configured to allow light to propagate therein, and a plurality of crystal regions arranged inside the main body along a propagation direction of the light. The plurality of crystal regions each have a spontaneous polarization oriented along the propagation direction (i.e., spontaneous polarization having a polarization orientation coinciding with the propagation direction).

Abstract: An optical connecting component configures to be mounted onto an optical component includes a plurality of optical fibers and terminal components disposed at the ends of the plurality of optical fibers. The optical fibers are arranged side by side and integrated together in a state in which the optical fibers can be separated from one another. A method of manufacturing an optical connecting component that includes a plurality of optical fibers and a terminal component disposed at ends of the plurality of optical fibers and that is mounted onto an optical component includes a step of arranging the plurality of optical fibers side by side and integrating the plurality of optical fibers together, a step of connecting end portions of the plurality of optical fibers to the terminal component, and a step of separating the plurality of optical fibers from one another.

Abstract: An in-vehicle communication system is an in-vehicle communication system to be mounted on a vehicle, and includes: a gateway performing relay processing involving communication protocol conversion; and one or a plurality of switching devices performing relay processing not involving the communication protocol conversion, the gateway or the switching device manages data update of a target device mounted on the vehicle, the gateway receives update data for the target device from an external device disposed outside the vehicle, transmits, to the switching device connected thereunder, the update data for the target device, which is connected to the switching device, not holding the update data at least after completing the update, and holds the update data for the target device, which is connected thereto, also after completing the update not through the switching device.

Abstract: A surface-coated cutting tool includes a substrate and a coating formed on a surface of the substrate, the coating including one or two or more layers, at least one of the layers being an Al-rich layer including hard particles, the hard particle having a sodium chloride type crystal structure, and including a first unit phase in a form of a plurality of lumps and a second unit phase interposed between the lumps of the first unit phase, the first unit phase being composed of a nitride or carbonitride of AlxTi1-x, the first unit phase having an atomic ratio x of Al of 0.7 or more and 0.96 or less, the second unit phase being composed of a nitride or carbonitride of AlyTi1-y, the second unit phase having an atomic ratio y of Al exceeding 0.5 and less than 0.7.