Abstract: Provided is an optical waveguide element capable of connection such as wire bonding, suppressing usage of gold, and suppressing deterioration of a conductor loss. An optical waveguide element includes a substrate 1 having an electro-optic effect, an optical waveguide 2 formed on the substrate, and a control electrode (30, 31) provided on the substrate and controlling a light wave propagating through the optical waveguide. The control electrode is made of a material other than gold, and the gold is disposed on at least a wire bonding portion 4 of the control electrode.

Abstract: Provided is an optical waveguide element capable of connection such as wire bonding, suppressing usage of gold, and suppressing deterioration of a conductor loss. An optical waveguide element includes a substrate 1 having an electro-optic effect, an optical waveguide 2 formed on the substrate, and a control electrode (30, 31) provided on the substrate and controlling a light wave propagating through the optical waveguide. The control electrode is made of a material other than gold, and the gold is disposed on at least a wire bonding portion 4 of the control electrode.

Abstract: In a waveguide-type optical modulation element that modulates light by applying radio frequency signals to an electrode, the realization of the additional broadening of the bandwidth by improving the degree of freedom in the design of the electrode is enabled. An optical modulation element, which includes optical waveguides provided in a substrate and electrodes that control light waves propagating through the optical waveguides and modulates light by propagating radio frequency signals to the electrodes, in which the electrodes include conductive layers made of copper or a copper alloy and protective layers made of a material other than copper and a copper alloy.

Abstract: In a light modulation element that modulates light by controlling light waves that propagate through an optical waveguide, the realization of the additional broadening of the bandwidth by improving the degree of freedom in the design of the electrode is enabled. A light modulation element which includes optical waveguides formed on a substrate and a control electrode and modulates light by controlling light waves that propagate through the optical waveguide by conducting electricity in the control electrode, in which the control electrode includes radio frequency electrodes that configure a signal line through which radio frequency signals propagate and a bias electrode to which a bias voltage is applied, and the radio frequency electrode has a conductive layer made of copper or a copper alloy.

Abstract: An optical control element including an optical waveguide formed by using diffusion of titanium that is formed on a lithium niobate substrate and a control electrode formed on the lithium niobate substrate that is provided in the vicinity of the optical waveguide, in which an amount of a hydroxyl group absorbed into the lithium niobate substrate is set to be in a range of 0.5 to 2.5 cm?1.

Abstract: In a waveguide-type optical modulation element that modulates light by applying radio frequency signals to an electrode, the realization of the additional broadening of the bandwidth by improving the degree of freedom in the design of the electrode is enabled. An optical modulation element, which includes optical waveguides provided in a substrate and electrodes that control light waves propagating through the optical waveguides and modulates light by propagating radio frequency signals to the electrodes, in which the electrodes include conductive layers made of copper or a copper alloy and protective layers made of a material other than copper and a copper alloy.

Abstract: An optical control element including an optical waveguide formed by using diffusion of titanium that is formed on a lithium niobate substrate and a control electrode formed on the lithium niobate substrate that is provided in the vicinity of the optical waveguide, in which an amount of a hydroxyl group absorbed into the lithium niobate substrate is set to be in a range of 0.5 to 2.5 cm?1.

Abstract: An optical waveguide device includes a substrate with an electro-optic effect on which an optical waveguide and an electrode for controlling optical waves propagating through the optical waveguide are formed and at least one light source for irradiating ultraviolet light on the substrate.

Abstract: To effectively prevent the acceleration of the drift phenomenon generated by the application of a high electric field to a substrate through a bias electrode in a waveguide type optical element. A waveguide type optical element includes a substrate (100) having an electro-optic effect, two optical waveguides (104 and 106) disposed on a surface of the substrate, a non-conductive layer (120) which is disposed on the substrate and is made of a material having a lower dielectric constant than the substrate, and a control electrode (150) which is disposed on the non-conductive layer and is intended to generate a refractive index difference between the two optical waveguides by respectively applying electric fields to the two optical waveguides, and the non-conductive layer is constituted of a material which includes silicon oxide, an oxide of indium, and an oxide of titanium and has a ratio between a molar concentration of the titanium oxide and a molar concentration of indium oxide of 1.

Abstract: To effectively prevent the acceleration of the drift phenomenon generated by the application of a high electric field to a substrate through a bias electrode in a waveguide type optical element. A waveguide type optical element includes a substrate (100) having an electro-optic effect, two optical waveguides (104 and 106) disposed on a surface of the substrate, a non-conductive layer (120) which is disposed on the substrate and is made of a material having a lower dielectric constant than the substrate, and a control electrode (150) which is disposed on the non-conductive layer and is intended to generate a refractive index difference between the two optical waveguides by respectively applying electric fields to the two optical waveguides, and the non-conductive layer is constituted of a material which includes silicon oxide, an oxide of indium, and an oxide of titanium and has a ratio between a molar concentration of the titanium oxide and a molar concentration of indium oxide of 1.

Abstract: An optical waveguide device includes a substrate with an electro-optic effect on which an optical waveguide and an electrode for controlling optical waves propagating through the optical waveguide are formed and at least one light source for irradiating ultraviolet light on the substrate.

Abstract: An optical modulation device includes a substrate having a principal surface, and electrodes provided on the principal surface of the substrate. The electrodes have end portion regions on the outer edge side of the principal surface of the substrate in a plan view, and planar-view corner portions provided between tip end outer edges which define the tip end shapes of the end portion regions in a first direction and side surface outer edges which define the side surface shapes of the end portion regions in the plan view have chamfered shapes.

Abstract: An object of the present invention is to provide an optical waveguide element that effectively diffuses charges accumulated in a substrate, and suppress DC drift or temperature drift. The optical waveguide element includes a substrate having an electro-optical effect, optical waveguides formed in the substrate, a buffer layer (BF layer) formed on the substrate, and modulation electrodes (signal electrode and ground electrode) that are formed on the buffer layer and modulate optical waves propagating through the optical waveguides, a charge diffusion layer that diffuses charges generated in the substrate is formed between the substrate and the buffer layer, and the charge diffusion layer is electrically connected with a ground electrode constituting the modulation electrode.

Abstract: An object of the present invention is to provide a manufacturing method of an optical waveguide element whose DC drift is suppressed, and to provide a manufacturing method of an optical waveguide element, capable of adjusting DC drift in the middle of manufacturing processes so as to improve a fabrication yield. The method of manufacturing an optical waveguide element comprises a step of forming an optical waveguide in a substrate having an electro-optic effect, a step of forming a buffer layer, and a step of forming an electrode, in which one stage or a plurality of stages of an interface diffusion layer heat adjustment step (S1, S2) for adjusting a concentration distribution of a specific substance in the buffer layer by heating is included after the buffer layer is formed.

Abstract: An object of the present invention is to provide an optical waveguide element that effectively diffuses charges accumulated in a substrate, and suppress DC drift or temperature drift. The optical waveguide element includes a substrate having an electro-optical effect, optical waveguides formed in the substrate, a buffer layer (BF layer) formed on the substrate, and modulation electrodes (signal electrode and ground electrode) that are formed on the buffer layer and modulate optical waves propagating through the optical waveguides, a charge diffusion layer that diffuses charges generated in the substrate is formed between the substrate and the buffer layer, and the charge diffusion layer is electrically connected with a ground electrode constituting the modulation electrode.

Abstract: An object of the present invention is to provide a manufacturing method of an optical waveguide element whose DC drift is suppressed, and to provide a manufacturing method of an optical waveguide element, capable of adjusting DC drift in the middle of manufacturing processes so as to improve a fabrication yield. The method of manufacturing an optical waveguide element comprises a step of forming an optical waveguide in a substrate having an electro-optic effect, a step of forming a buffer layer, and a step of forming an electrode, in which one stage or a plurality of stages of an interface diffusion layer heat adjustment step (S1, S2) for adjusting a concentration distribution of a specific substance in the buffer layer by heating is included after the buffer layer is formed.

Abstract: An optical waveguide device that uses a thin substrate having an electro-optical effect and a thickness of 10 ?m or less, in which slab propagation light that is reflected from an end face of the device is removed and thus deterioration in an operational characteristic is suppressed. The optical waveguide device includes: a thin substrate which has an electro-optical effect and thickness of 10 ?m or less, and in which an optical waveguide is formed; and a supporting substrate that is adhered to the thin substrate through an adhesion layer. An antireflective film is formed on a part of a side surface of the optical waveguide device.

Abstract: An object of present invention is to provide an optical waveguide element that suppresses damage to an optical waveguide element by a pyroelectric effect due to a reinforcement substrate. Provided is an optical waveguide element in which an optical waveguide substrate is bonded to a reinforcement substrate having an electro-optical effect via an adhesive layer, the optical waveguide substrate having an optical waveguide formed on a substrate having the electro-optical effect and having a thickness of 30 ?m or less, wherein a semiconductor layer is provided on a surface of the adhesive layer side of the reinforcement substrate.

Abstract: There is provided a shoe bottom repair agent consisting of one-component thermosetting composition comprising as main ingredients a terminal isocyanate having urethane prepolymer and/or a polyisocyanate compound and a latent curing agent. This shoe bottom repair agent is free from, experienced in use of solvent base shoe bottom repair agents, safety and sanitation problems such as odor and inflammation by solvent evaporated at the time of curing as well as cured matter thickness reduction of a mended part caused by solvent evaporation. With use of this shoe bottom repair agent, damaged shoe bottom portion can be mended to a desired shape through one-time repair work. Short-time curing can be effected by heating. Further, before heating, there is substantially no viscosity increase and no surface film is formed to avoid adhesion of a film resulting from surface drying to a spatula. Therefore, the repair surface can be finished smoothly and neatly.

Abstract: The invention is related to a method for producing a steamed, exploded, and fermented dietary fiber, comprising the steps of: subjecting a hemicellulose-containing plant resource to a steam treatment followed by an explosion treatment (2.5 Mpa, 70 seconds); mixing wheat bran into this steamed and exploded material; adjusting water content of this mixture to about 50%; subsequently preparing koji with the use of a koji fungus; adding water to the koji thus obtained; mixing the steamed and exploded material into a koji dispersion wherein koji is dispersed into water; adjusting water content of this mixture to about 50%; subsequently fermenting the mixture. This method produces a useful material as a food material and a health supplement, by a simple process, with efficiency, and at a low cost.