Abstract: An optical connection element includes a first waveguide core and a second waveguide core above a substrate or a cladding and in which signal light and resin curing light propagate through the first waveguide core and the second waveguide core, the optical connection element including: an inter-core light coupling section in which a part of the first waveguide core and a part of the second waveguide core overlap in a perpendicular direction; and a resin curing light coupling section that couples resin curing light to the second waveguide core.

Abstract: An embodiment lens structure body includes a microlens portion of double-sided asymmetric aspherical shape having a refraction surface on an illuminant side and a refraction surface on an emission side so as to be opposed to the refraction surface, and marker portions formed so as to be joined to both ends of the microlens portion in a direction perpendicular to an optical axis.

Abstract: An optical fiber guide structure includes a guide member uprightly provided on a connection surface of an optical waveguide device and forming a space for housing a tip of an optical fiber when the optical fiber is connected to the optical waveguide device. The guide member is made of a photocurable resin. On the plane perpendicular to the direction in which the optical fiber is inserted into the space, the diameter of an inscribed circle within an inner wall of the guide member configured to form the space is substantially identical to the outer diameter of the optical fiber. The center of the inscribed circle coincides with the center of the core exposed from the connection surface of the optical waveguide device when viewed in the direction in which the optical fiber is inserted.

Abstract: An optical connection structure includes a waveguide substrate; a Si waveguide formed on one surface of the waveguide substrate 100 and having a first end surface; an optical fiber having a second end surface facing the first end surface; a terrace section extending further toward the optical fiber side from an end portion on the optical fiber side of the waveguide substrate; and a support member formed on the terrace section, and including, on a top surface in a view from the terrace section, a recess c configured to support a lens.

Abstract: A first optical waveguide, a second optical waveguide, a connection optical waveguide including a resin core that optically connects the first optical waveguide and the second optical waveguide are included. The resin core is covered with cladding. The second optical waveguide has a core with a diameter that is different from a diameter of a core of the first optical waveguide. The resin core is disposed between an end surface of the first optical waveguide and an end surface of the second optical waveguide and optically connects the first optical waveguide and the second optical waveguide. Moreover, the resin core is configured with a cured photo-curable resin.

Abstract: An optical fiber guide structure includes a guide member that is configured to be erected on a connection end surface of an optical waveguide device and forms a space for accommodating a leading end portion of an optical fiber to be connected to the optical waveguide device. The guide member is formed of an elastically deformable material, and in a specific region a longitudinal direction of the guide member, and a diameter of an inscribed circle in contact with an inner wall of the guide member in a plane perpendicular to the longitudinal direction is smaller than an outer diameter of the optical fiber.

Abstract: A light conversion portion includes a conversion material that converts infrared light to visible light. A reflection portion is fixed to a position on a main substrate at which the reflection portion faces an output end of an optical waveguide chip on the side from which light is output to an external space. The reflection portion includes a reflection surface that faces the output end and is inclined with respect to a plane of the main substrate such that a reflection direction is toward the upper side of the main substrate. The reflection surface reflects near infrared light.

Abstract: An optical connector includes a ferrule, an optical fiber, a tube, and a holding component. The ferrule includes a guide hole. The ferrule is formed from either crystallized glass, borosilicate glass, or quartz glass. The optical fiber includes an optical fiber body and a cover that covers the optical fiber body. The tube is disposed on the fiber extension side of one end of the guide hole and houses the optical fiber extending out from the fiber extension side. The tube is formed from either glass or polyimide resin.

Abstract: Provided is an optical connection component that is constituted of a plate-shaped substrate configured to transmit light to be used, and a resin optical waveguide. The resin optical waveguide is constituted of a resin core formed with a resin through which light to be used passes. For example, the resin core is formed with a light-cured resin. The resin optical waveguide uses air surrounding the resin core as a cladding. The resin core has a folded back structure in which the resin core once separates from the surface of the substrate and then returns to the surface of the substrate, and is connected to each of a first input/output end and a second input/output end of the substrate.

Abstract: An optical fiber connection structure according to the present invention includes a fiber support member configured to support an optical fiber to be optically connected to an optical waveguide device, a stopper configured to restrict movement in an axial direction of the optical fiber supported by the fiber support member, and a lens disposed on an optical axis between an end surface of the optical waveguide device and the optical fiber.

Abstract: A light conversion portion is constituted by a conversion material that converts infrared light to visible light. A reflection portion is fixed to a position on a main substrate at which the reflection portion faces an output end of an optical waveguide chip on the side from which light is output to an external space. The reflection portion includes a reflection surface that faces the output end and is inclined with respect to a plane of the main substrate such that a reflection direction is toward the upper side of the main substrate. The reflection surface reflects near infrared light.

Abstract: An embodiment optical connecting structure is an optical connecting structure in a package structure connected to an optical fiber and including a first electric wiring board and a second electric wiring board facing the first electric wiring board. The optical connecting structure includes an optical element arranged on either the first electric wiring board or the second electric wiring board and a GRIN lens arranged on a surface of the second electric wiring board facing the first electric wiring board, in which one end surface of the GRIN lens faces an end surface of the optical element.

Abstract: An optical element that is optically coupled to light inlet/outlet ends of an optical fiber is disposed on a base placed near the light inlet/outlet ends of the optical fiber. Moreover, a rod-like reinforcing member has an integral structure fixed into a first hole formed in the optical fiber and a second hole formed in the base 102.

Abstract: Optical alignment between an optical waveguide device and an optical connection part is realized easily and at low cost. An optical circuit in which optical waveguides to be connected to optical fibers are formed includes: an alignment optical waveguide configured to be opposed to, on an optical waveguide edge face to which an optical connection part having guide holes for insertion of core wires of the optical fibers is to be fixed, a guide hole into which an alignment optical fiber is to be inserted; and a light path changing member configured to change a path of light to a vertical direction with respect to the optical axis direction of the core of the alignment optical waveguide.

Abstract: An embodiment optical body is provided in a propagation path of light between a Si waveguide and an optical fiber. The optical body changes a course of some of radiation mode light, which is emitted from the Si waveguide and propagates in a direction away from an optical axis thereof, to obtain waveguide mode light passing through itself. Thus, the amount of waveguide mode light incident on the optical fiber increases, and the coupling efficiency between the Si waveguide and the optical fiber is improved.

Abstract: An optical connection structure includes a first focus lens arranged between a first light incidence/emission end and an optical element, and a second focus lens arranged between a second light incidence/emission end and the optical element. The first focus lens and the second focus lens are arranged on an optical axis connecting the first light incidence/emission end and the second light incidence/emission end.

Abstract: An optical connection structure 1 includes a waveguide substrate; a Si waveguide formed on one surface of the waveguide substrate and having a first end surface; an optical fiber having a second end surface facing the first end surface; a terrace section extending further toward the optical fiber side from an end portion on the optical fiber side of the waveguide substrate; and a lens disposed on the terrace section, and arranged on an optical axis connecting the first end surface and the second end surface.

Abstract: There is provided an optical connection structure in which an optical fiber and an optical semiconductor waveguide are easily connected with low loss. The present invention relates to an optical connection structure configured to connect an optical waveguide device and an optical fiber including cores having different refractive indexes, wherein an optical connection component using a planar lightwave circuit is bonded and fixed on an end surface of an input/output waveguide of the optical waveguide device, a value of a refractive index of a core of the planar lightwave circuit is between a value of the refractive index of the core of the optical waveguide device and a value of the refractive index of the core of the optical fiber, and the optical waveguide device and the optical fiber are optically connected via the planar lightwave circuit.

Abstract: A photoelectric fiber includes a fiber including a core through which light is guided; an electrical unit formed continuously with the fiber, the electrical unit being configured to house a photoelectric conversion chip including a photoelectric conversion element; and an external electrode formed on a front surface of at least one of the fiber or the electrical unit, wherein the photoelectric conversion chip is optically connected to the core and electrically connected to the external electrode.

Abstract: An embodiment mounting structure of an optical module includes, in order, a plurality of optical modules, a first optical waveguide component, a first optical connector, a second optical connector, and a second optical waveguide component, in which the first optical connector includes a first magnetic component and accommodates the first optical waveguide component optically connected to the optical modules, the second optical connector includes a second magnetic component and accommodates the second optical waveguide component, and at least one of the first magnetic component or the second magnetic component includes a hard magnetic material, and by causing a magnetic force to act between the first magnetic component and the second magnetic component, an attractive force is applied in a direction in which a gap between facing end surfaces of the first magnetic component and the second magnetic component decreases.