Abstract: An optical connector having a shutter is disclosed. The optical connector comprises an optical connection component configured to hold one or a plurality of optical fibers, and having a light incidence/emission end surface being movable in the connection direction with respect to the optical connection component; a second member having a shutter part that performs opening/closing of an opening, the second member being attached to the first member in a state of being rotatable around a rotation axis; a first sealing member contacting the first member over a whole circumference of the opening, the first sealing member also contacting the shutter part over the whole circumference of the opening when the shutter part is in a closed state; and a linkage mechanism that rotates the second member in conjunction with movement of the first member along the connection direction with respect to the optical connection component.
September 5, 2017
Date of Patent:
October 6, 2020
SUMITOMO ELECTRIC INDUSTRIES, LTD.
Takuro Watanabe, Dai Sasaki, Yoshikyo Tamekuni, Takako Hosokawa
Abstract: A current collector included in a fuel cell, the fuel cell including a membrane electrode assembly including a solid polymer electrolyte layer and a pair of electrode layers formed to sandwich the solid polymer electrolyte layer, the current collector stacked on each electrode layer, and a gas flow path for supply of a gas to each electrode layer, the current collector including a metal porous body which is stacked on the electrode layer, has a flowing gas supplied to the electrode layer, and is rendered conducting to the electrode layer, and the metal porous body including an electrically conductive layer containing electrically conductive particles fixed to a corrosion-resistant and water-repellent resin at least on a side of the electrode layer.
March 19, 2015
Date of Patent:
October 6, 2020
Sumitomo Electric Industries, Ltd., NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
Abstract: An optical connecting device includes: a holder part having first and second holder members and a resin body therebetween; and multiple optical fibers each having first and second resin-uncoated fiber portions and the first and second resin-coated fiber portions. The first resin-uncoated fiber portion is disposed between first portions of the first and second holder members so as to extend in a direction of a first axis and be arranged along a first reference plane. The second resin-uncoated fiber portion and the first resin-coated fiber portion extend between second portions of the first and second holder members. One of the first and second holder members has a through-hole, extending along a second axis intersecting the first axis in the second portions thereof, receiving the resin body. The first and second holder members have first and second inner faces, separated away from the first reference plane, in the second portions, respectively.
Abstract: A method for manufacturing an optical connector includes a ferrule configured to retain a plurality of optical fibers and the steps of: exposing tip end faces of the plurality of optical fibers to an end face of the ferrule to fix the plurality of optical fibers to the ferrule; polishing the end face together with the tip end faces; positioning an adhesive film containing a material different from the material of the ferrule to the end face in a layered film having a plurality of films; and welding, to the ferrule, a spacer film containing a material the same as the material of the ferrule in the layered film.
Abstract: An optical connector ferrule according to an embodiment includes an MT ferrule, and a spacer mounted on an optical end surface of the MT ferrule and having a guide hole into which a guide pin is inserted. The spacer has a contact surface that contacting the counterpart connector and a recess surrounded by the contact surface. The spacer includes a lens part exposed on a bottom surface of the recess and optically coupled to the optical end surface of the MT ferrule and a base part that retains the lens part by surrounding the lens part. The material of the lens part and the material of the base part are different from each other, and the difference between the linear expansion coefficient of the base part and the linear expansion coefficient of the MT ferrule is 0.5×10?5/° C. or less.
March 23, 2020
October 1, 2020
SUMITOMO ELECTRIC INDUSTRIES, LTD., JAPAN COMMUNICATION ACCESSORIES MANUFACTURING CO., LTD.
Dai SASAKI, Takayuki SHIMAZU, Hajime ARAO, Takuro WATANABE, Sho YAKABE, Motoyoshi KIMURA, Manabu IZAKI
Abstract: A semiconductor stacked body includes a base layer containing a III-V group compound semiconductor, a light-receiving layer containing a III-V group compound semiconductor, a control layer containing a III-V group compound semiconductor and disposed in contact with the light-receiving layer, a diffusion blocking layer containing a III-V group compound semiconductor and a p-type impurity that generates a p-type carrier, the diffusion blocking layer having a p-type impurity concentration of 1×1016 cm?3 or less, and a contact layer containing a III-V group compound semiconductor and having p-type conductivity. These layers are stacked in this order. The concentration of an element in the control layer, the element being identical to a group V element contained in the light-receiving layer, is lower on a main surface of the control layer adjacent to the diffusion blocking layer than on a main surface of the control layer adjacent to the light-receiving layer.
Abstract: The battery cell for a flow battery includes a cell frame including a frame including a through-window and a manifold serving as an electrolyte flow path, and a bipolar plate blocking the through-window; a positive electrode disposed on one surface side of the bipolar plate; and a negative electrode disposed on another surface side of the bipolar plate. In this battery cell, in the frame, a thickness of a portion in which the manifold is formed is defined as Ft; in the bipolar plate, a thickness of a portion blocking the through-window is defined as Bt; in the positive electrode, a thickness of a portion facing the bipolar plate is defined as Pt; in the negative electrode, a thickness of a portion facing the bipolar plate is defined as Nt; and these thicknesses satisfy Ft?4 mm, Bt?Ft?3.0 mm, Pt?1.5 mm, and Nt?1.5 mm.
Abstract: A wavelength de-multiplexing system that receives a wavelength multiplexed signal and generates electrical signals corresponding to the optical signals is disclosed. The optical receiver module includes a lens, a lens unit, and an optical de-multiplexer (O-DeMux). The lens converts the wavelength multiplexed signal into a quasi-collimated beam. The lens unit narrows a diameter of the quasi-collimated beam. The O-DeMux de-multiplexes the narrowed quasi-collimated beam coming from the lens unit by wavelength selective filters (WSFs) each having optical distances from the lens unit different from each other.
June 2, 2020
September 24, 2020
Sumitomo Electric Industries, Ltd., Sumitomo Electric Device Innovations, Inc.
Abstract: A terminal structure of an armored cable includes an end of an armored cable, a terminal metal fitting, and a support. The end includes a core, and an armoring including armor wires made of copper or copper alloy disposed on an outer circumference of the core. The terminal metal fitting is attached to an end of each armor wire. The support is disposed on a tip side of the core and supports a plurality of the terminal metal fittings. The support includes a base plate and a fixing member. The base plate is provided with a first through hole into which the core is inserted, and second through holes which are provided on an outer circumference of the first through hole and into each of which a corresponding one of the terminal metal fittings is inserted. The fixing member fixes each terminal metal fitting to the base plate.
Abstract: The optical module includes: a housing having first and second end walls and a pair of side walls; a semiconductor laser element; a first TEC; a wavelength locker unit including an optical splitting component and an etalon filter; and a second TEC. The second end wall is provided with a feedthrough. The pair of side walls is not provided with an external connection terminal. The second TEC is disposed between the first TEC and the second end wall and has: a first substrate thermally coupled to a bottom surface of the housing; a second substrate thermally coupled to the etalon filter; and a heat transfer part that transfers heat. The optical module further includes a wiring pattern that is arranged side by side with the heat transfer part and that supplies electric power to the first TEC from the feedthrough.
Abstract: A method for manufacturing an optical semiconductor device, includes the steps of: forming a plurality of compound semiconductor layers including a sacrificial layer, an absorption layer, and a core layer; forming a first mesa from the plurality of compound semiconductor layers; forming an embedding layer that is a semiconductor layer having the first mesa embedded therein; after the step of forming the embedding layer, etching the sacrificial layer to form a chip including the plurality of compound semiconductor layers and the embedding layer; bonding the chip to a substrate comprising silicon and having a waveguide; and etching a portion of the first mesa of the chip bonded to the substrate to form a second mesa adjacent to the first mesa. The second mesa includes the core layer and is optically coupled to the waveguide of the substrate.
Abstract: This wireless sensor system includes: one or a plurality of wireless terminal devices each configured to transmit data including sensor information indicating a result of measurement by a sensor; a management device; and a plurality of relay devices configured to relay the data received from the wireless terminal devices, to the management device or another relay device. Each of the relay devices transmits, to the management device, communication state information from one or a plurality of the wireless terminal devices to the relay device. On the basis of the communication state information received from each relay device, the management device transmits, to a relay device as a target, relay permissibility information that enables discernment, for each target terminal which is one or a plurality of the wireless terminal devices, as to whether or not relay by the relay device of the data from the target terminal is permitted.
Abstract: An optical connector that requires fewer components and also has a simpler structure includes an optical fiber including a glass fiber and a resin coating surrounding the glass fiber; a ferrule having a flange outside the ferrule and a through-hole inside the ferrule, the ferrule holding, in the through-hole, a portion of the glass fiber exposed from the resin coating at an end of the optical fiber; a plug frame accommodating the ferrule; and an elastic member abutting the flange and biasing the ferrule. The flange has a flat surface on an outer periphery thereof, and the plug frame has a guide surface configured to unrotatably align the ferrule biased by the elastic member in contact with the flat surface of the flange. When the ferrule is moved in the direction opposite to the biasing direction, the flat surface is separated from the guide surface to bring the ferrule into a floating state relative to the plug frame.
Abstract: A ceramic substrate is formed of polycrystalline ceramic and has a supporting main surface. At the supporting main surface of the ceramic substrate, the mean of grain sizes of the polycrystalline ceramic is 15 ?m or more and less than 40 ?m and the standard deviation of the grain sizes is less than 1.5 times the mean.
Abstract: A control apparatus includes a switching unit configured to switch a state of a first and a second on-vehicle power supply to a power or a non-power supplying state, an acquisition unit configured to acquire operation information indicating whether the control device is in an operating or non-operating state, and a control unit configured to execute, in a case where a combination of the first and the second power supply is changed from a first to a second pattern, start-up control to determine a state in the second pattern, of an on-vehicle control device suppliable with power from the first power supply, based on the operation information in the first pattern. The first pattern is the first power supply in the power supplying state and the second power supply in the non-power supplying state. The second pattern in the first and second power supplies are in the power supplying state.
Abstract: Provided is a polyethylene resin for use in a spacer for an optical fiber cable, the polyethylene resin having a density of 0.952 g/cm3 or more, containing a polyethylene having a molecular weight of 10,000 or less in a weight fraction of 22% or more, and containing a polyethylene having a molecular weight of 300,000 or more in a weight fraction of 12% or more.
Abstract: A PON system according to one manner of the present invention includes an optical line terminal (OLT), at least one optical network unit (ONU), and an optical fiber that connects the optical line terminal and the optical network unit to each other. A reception level category for categorizing a reception level in the optical network unit, of an optical signal sent from the optical line terminal through the optical fiber is set. In discovery processing for searching for and registering an unregistered optical network unit, the optical line terminal registers an optical network unit corresponding to the reception level category.
Abstract: An optical transceiver according to an embodiment includes a plurality of optical sub-assemblies, a circuit board, an optical receptacle, a WDM module, support member and a housing including the plurality of optical sub-assemblies, the circuit board, the optical receptacle, the WDM module, and the support member. The transmission sleeve and the reception sleeve have respective protrusions coupled to the plurality of first internal fibers in one to one. The housing has holes configured to allow the transmission sleeve and the reception sleeve for being inserted to the housing. The support member has a retaining part configured to retain the protrusions of the transmission sleeve and the reception sleeve for positioning the transmission sleeve and the reception sleeve.
Abstract: An optical fiber according to an embodiment has a structure for enabling determination of improvement in transmission loss at a preform stage. The optical fiber includes: a core containing Cl and having an average refractive index lower than a refractive index of pure silica glass; a first cladding containing F; a second cladding; and a resin coating, in which an effective area at a wavelength of 1550 nm is 135 ?m2 or more and 170 ?m2 or less, a ratio of the effective area to a cutoff wavelength ?C is 85.0 ?m or more, a bending loss of an LP01 mode at a wavelength of 1550 nm and at a bending radius of R15 mm is less than 4.9 dB per 10 turns, and the resin coating includes a primary resin layer having a Young's modulus of 0.3 MPa or less.
Abstract: A diamond polycrystal is a diamond polycrystal basically composed of a diamond single phase, wherein the diamond polycrystal is composed of a plurality of diamond grains having an average grain size of less than or equal to 30 nm, and the diamond polycrystal has a carbon dangling bond density of more than or equal to 10 ppm.