Abstract: A transmission device includes an input/output unit that inputs or outputs an optical signal, and an optical amplifier that amplifies the optical signal passing through an optical fiber by excitation light. The optical amplifier includes a fiber-bundle set that includes a plurality of fiber bundles each formed by winding the optical fiber, and a plate-shaped heating member that has one surface along which the fiber bundles are arranged, and the fiber bundles have mutually different winding radii and are concentrically arranged on the surface of the plate-shaped heating member.

Abstract: There is provided a cable holder including: a first holder configured to house a cable; and a second holder configured to house the cable, the second holder being at least partly housed in the first holder, wherein the second holder is held by the first holder, and drawn along the first holder.

Abstract: There is provided a cable holder including: a first holder configured to house a cable; and a second holder configured to house the cable, the second holder being at least partly housed in the first holder, wherein the second holder is held by the first holder, and drawn along the first holder.

Abstract: An optical fiber holder includes a pair of first optical fiber guides, each of the first optical fiber guides satisfying a condition of an allowable bend radius of an optical fiber; a second optical fiber guide configured to hold a joined portion of the optical fiber at a position between the first optical fiber guides, the second optical fiber guide satisfying the condition of the allowable bend radius of the optical fiber; and a tray to hold the first optical fiber guides and the second optical fiber guide, the tray having a fiber extraction opening for pulling the optical fiber onto the tray. A distance from the fiber extraction opening to a fixing position of the second optical fiber guide on the tray is set smaller than a distance from the fiber extraction opening to a fixing position of the first optical fiber guides on the tray.

Abstract: There is provided an optical fiber module including a reel having a flange on one side of both sides thereof, a first optical fiber being wound around the reel, a first adhesive being applied to a roll of the first optical fiber so that lines of the first optical fiber are fixed to each other and the roll of the first optical fiber is fixed to the flange of the reel, and a first sheet member being fixed to the roll of the first optical fiber with the first adhesive.

Abstract: An optical fiber holder includes a pair of first optical fiber guides, each of the first optical fiber guides satisfying a condition of an allowable bend radius of an optical fiber; a second optical fiber guide configured to hold a joined portion of the optical fiber at a position between the first optical fiber guides, the second optical fiber guide satisfying the condition of the allowable bend radius of the optical fiber; and a tray to hold the first optical fiber guides and the second optical fiber guide, the tray having a fiber extraction opening for pulling the optical fiber onto the tray. A distance from the fiber extraction opening to a fixing position of the second optical fiber guide on the tray is set smaller than a distance from the fiber extraction opening to a fixing position of the first optical fiber guides on the tray.

Abstract: A tray-type structure device includes a side plate, a front plate attached to a forward end of the side plate, having the functions of opening and closing, and positioned on the front side of a housing, a top plate attached to an upper end of the side plate, with a plurality of openings formed therein, and having the function of variably setting a ventilation resistance, a bottom plate attached to a lower end of the side plate, with a plurality of openings formed therein, and having the function of variably setting a ventilation resistance, and a back plate attached to a rearward end of the side plate, having the functions of opening and closing, and positioned on a side of the housing toward a backboard. The device has a tray structure having a tray-like shape formed by the front plate, top plate, bottom plate, side plate and back plate.

Abstract: There is provided an optical fiber module including a reel having a flange on one side of both sides thereof, a first optical fiber being wound around the reel, a first adhesive being applied to a roll of the first optical fiber so that lines of the first optical fiber are fixed to each other and the roll of the first optical fiber is fixed to the flange of the reel, and a first sheet member being fixed to the roll of the first optical fiber with the first adhesive.

Abstract: An electronic device is provided that includes a first component generating heat, a second component to be heated, a heating part configured to heat the second component, and a case containing the first component, the second component, and the heating part. The second component is heated with the heating part and the heat generated by the first component.

Abstract: A tray-type structure device includes a side plate, a front plate attached to a forward end of the side plate, having the functions of opening and closing, and positioned on the front side of a housing, a top plate attached to an upper end of the side plate, with a plurality of openings formed therein, and having the function of variably setting a ventilation resistance, a bottom plate attached to a lower end of the side plate, with a plurality of openings formed therein, and having the function of variably setting a ventilation resistance, and a back plate attached to a rearward end of the side plate, having the functions of opening and closing, and positioned on a side of the housing toward a backboard. The device has a tray structure having a tray-like shape formed by the front plate, top plate, bottom plate, side plate and back plate.

Abstract: A disclosed capacitor sheet attached to an electronic apparatus comprises: a laminated body; a first penetration electrode penetrating the laminated body, the first penetration electrode being electrically connected to a terminal electrode of the electronic apparatus; a second penetration electrode disposed at an arrangement position different from that of the first penetration electrode on the laminated body, the second penetration electrode being electrically insulated from the first penetration electrode and penetrating the laminated body; at least one first conductor thin film electrically connected to the first penetration electrode and insulated from the second penetration electrode; and at least one second conductor thin film disposed so as to face the first conductor thin film via a dielectric layer, the second conductor thin film being electrically connected to the second penetration electrode and insulated from the first penetration electrode.

Abstract: An electronic device is provided that includes a first component generating heat, a second component to be heated, a heating part configured to heat the second component, and a case containing the first component, the second component, and the heating part. The second component is heated with the heating part and the heat generated by the first component.

Abstract: A disclosed capacitor sheet attached to an electronic apparatus comprises: a laminated body; a first penetration electrode penetrating the laminated body, the first penetration electrode being electrically connected to a terminal electrode of the electronic apparatus; a second penetration electrode disposed at an arrangement position different from that of the first penetration electrode on the laminated body, the second penetration electrode being electrically insulated from the first penetration electrode and penetrating the laminated body; at least one first conductor thin film electrically connected to the first penetration electrode and insulated from the second penetration electrode; and at least one second conductor thin film disposed so as to face the first conductor thin film via a dielectric layer, the second conductor thin film being electrically connected to the second penetration electrode and insulated from the first penetration electrode.

Abstract: In an SFP module mounting structure where an SFP module connected to a connector mounted on a printed board is held by a holder, the holder has both side faces which hold the SFP module on the both sides, a flap which is provided on an upper edge of the both side faces so as to make the SFP module insertable and extractable in an oblique upper direction as well as to prevent the SFP module from being disengaged upward and a bottom face which supports the both side faces on the printed board. The connector may be provided with an electrode which is connected to the SFP module when the SFP module is inserted into the holder from the oblique upper direction and which has a returning elastic force enabling the SFP module to move pivotally down to a state that is parallel to the printed board.