Abstract: A production method of an optical waveguide includes: preparing a laminated body that includes a first clad layer and at least a core layer laminated on the first clad layer; forming a light propagating optical waveguide core by cutting the core layer by use of a dicing saw from a side where the core layer is laminated while intruding an edge of a blade portion of the dicing saw into the first clad layer so as to partially cut the first clad layer; and embedding at least a cut portion of the laminated body with a second clad layer.

Abstract: An optical waveguide film includes an optical waveguide film main body having an optical waveguide core through which light is propagated, and a cladding portion that encloses the optical waveguide core and has a lower refractive index than that of the optical waveguide core; and an electric wiring layer formed on at least a part of a principal surface of the optical waveguide film main body.

Abstract: An optical element mounting method includes: illuminating ultraviolet light onto a polymer optical waveguide device; under the ultraviolet light illumination, capturing, by an image pickup device, the polymer optical waveguide device including a light incident/exiting position of a waveguide core; and judging, from a difference between bright and dark in a captured image, that a portion brighter than other portions or a portion darker than other portions is the light incident/exiting position of the waveguide core.

Abstract: A method of fabricating a polymer optical circuit is provided. The method includes structuring a mold with a main mold and an auxiliary mold. The main mold has a first concavity corresponding to a first portion of the waveguide core, a second concavity corresponding to an end portion of the waveguide core with a specific shape, an injection hole for injecting a resin into the concavities, and a suction hole for suctioning-out the resin. The auxiliary mold has a shape corresponding to the specific shape of the end portion of the waveguide core. The method also includes firmly sticking a clad base film to a surface of the mold where the concavities are formed; filling the concavities with resin by injecting the resin via the injection hole and suctioning the resin via the suction hole; and forming the waveguide core by curing the resin.

Abstract: An optical waveguide device includes: a waveguide core that guides light; a mirror surface that deflects light coming from the waveguide core by 90°; a main waveguide core that guides light deflected at the mirror surface; a waveguide core for monitoring that branches the light deflected at the mirror surface off from the main waveguide core, and guides the light in a different direction, the mirror surface being disposed at a branching portion of the waveguide core for monitoring; and a clad portion that surrounds the waveguide core, the main waveguide core and the waveguide core for monitoring.

Abstract: A sub-mount for mounting optical components includes a recess for mounting whose side wall is tapered. A light transmission and reception module includes the sub-mount for mounting optical component. The sub-mount is manufactured by forming a master mold of the sub-mount formed with projections and recesses including the recess for mounting of the sub-mount, applying liquid silicone rubber to the mater mold, curing the liquid silicone rubber to produce a mold for duplication, filling the curable material into the mold for duplication, curing the curable material, and separating the cured curable material from the mold for duplication.

Abstract: An optical waveguide includes: a center layer including at least two core layers whose edges are on substantially the same plane, and a first cladding layer provided between adjacent core layers; and a second cladding layer provided at least on both of front and rear surfaces of the center layer. At least surfaces of the core layer and the first cladding layer that are in contact with the second cladding layer include at least one resin selected from the group consisting of a resin having a hydroxyl group and a resin containing a silicon-silicon bond at a main chain thereof, and the second cladding layer includes a silicone resin.

Abstract: The present invention provides a titanium oxide photocatalytic thin film having a surface layer containing silicon oxide and titanium oxide and a production method for producing a titanium oxide photocatalytic thin film having a surface layer containing silicon oxide and titanium oxide and comprising a step of radiating excimer beam to the titanium oxide thin film while heating substrate on which the titanium oxide thin film is disposed in vacuum or gas atmosphere in the presence of a silicon-including compound.

Abstract: An optical waveguide includes a layer A and a plurality of cores enclosed in a cladding. During production of the optical waveguide, a layered film including alternate layers of a core layer and a cladding layer is cut so as to form a groove that penetrates through the layered film in a thickness direction and so as to form a plurality of core portions, and the layer A is provided so as to partially fill the groove depthwise and so as to maintain spacing between the plurality of core portions before the core portions is enclosed by the cladding.

Abstract: A polymer optical waveguide includes: an optical waveguide portion that includes a core and a cladding each formed of polymer material; and a conductive line that is installed along the core integrally with the optical waveguide portion, and that has an electrode surface for external connection exposed on a surface different from an end surface of the optical waveguide portion.

Abstract: A flexible optical waveguide film comprises: two waveguide cores; and a clad surrounding the two waveguide core, wherein a light entrance/exit part is disposed at one end of each of the two waveguide cores, the waveguide film having an optical path converting part comprising an air void located inside the waveguide film, and a light entrance/exit end face of the light entrance/exit part is a plane surface facing an optical path converting surface of the optical path converting part, the optical path converting surface being an interface defining the air void.

Abstract: The present invention provides an optical waveguide including: a cladding; at least one core embedded in the cladding; and a colored layer that is provided at a portion substantially overlapping with the core when viewed from a direction substantially perpendicular to the principal surfaces of the optical waveguide, and that is not in contact with the core.

Abstract: An optical substrate includes: a submount; a planar optical element which is mounted on the submount; a pair of positioning members which are disposed at an interval across the planar optical element on the submount; an optical waveguide in which a core and a clad are formed by a flexible material; and a holding member which holds the optical waveguide to allow a tip end of the optical waveguide to be inserted between the pair of positioning members, and the optical waveguide to be bent to extend parallel to the submount.

Abstract: A process for producing a polymer optical waveguide including: 1) preparing a rubber mold having a composite layer structure in which a rubber layer which has a concave portion corresponding to an optical waveguide core and contains a rubber mold-forming curable resin is buried in a rubber layer-forming concave portion of a rigid substrate having the rubber layer-forming concave portion; 2) bringing a cladding substrate into close contact with the rubber mold; 3) filling the concave portion of the rubber mold, with which the cladding substrate has been brought into close contact, with a core-forming curable resin; 4) curing the filled core-forming curable resin; 5) removing the rubber mold from the cladding substrate; and 6) forming a cladding layer on the cladding substrate on which the core has been formed.

Abstract: A method for producing a polymer optical waveguide including: (1) preparing a template that is made of a template forming curable resin and has a concave portion, (2) applying an ozone treatment or irradiating light having a wavelength of 300 nm or less to at least one of a surface of the template having the concave portion and a core formation surface of a cladding film substrate, (3) bringing the cladding film substrate into close contact with the template, (4) filling a core forming curable resin into the concave portion of the template with which the cladding film substrate is in close contact, (5) curing the filled core forming curable resin to form a core, (6) removing the template from the cladding film substrate, and (7) forming a cladding layer on the cladding film substrate on which the core has been formed.

Abstract: An optical waveguide film of an optical reception and transmission module guides light. A first optical path converting part of an optical transmission unit guides light. A mirror surface of a first optical path converting part bends light which is emitted from a light emitting element and which enters the first optical path converting part. A first holding member holds the light emitting element and the first optical path converting part. A second optical path converting part of an optical reception unit guides light. A mirror surface of a second optical path converting part bends the guided light. A second holding member holds the light receiving element and the second optical path converting part. A first supporting member supports the first end portion of the optical waveguide film. A second supporting member supports the second end portion of the optical waveguide film.

Abstract: A method of producing a polymer optical waveguide, the method including preparing a core-forming mold having a concave portion corresponding to at least one optical waveguide core, bringing a concave side of the core-forming mold into close contact with a flat substrate, filling a core-forming curable resin into the concave portion by suction and/or by utilizing a capillary phenomenon, curing the core-forming curable resin to form an optical waveguide core, and removing the optical waveguide core from the core-forming mold and the flat substrate.

Abstract: An optical waveguide includes: a lower substrate; a waveguide core that is formed on the lower substrate; a clad that is formed to surround a periphery of the waveguide core; and an upper substrate that is opposed to the lower substrate, wherein the waveguide cores, the lower substrate and the upper substrate surround a cavity extended along the waveguide core.

Abstract: A lens-incorporating optical waveguide includes: a core; a clad enclosing the cores; and a lens provided in the core so as to cross a propagating direction of light.

Abstract: An optical transmission unit of an optical reception and transmission module holds a first end portion of the optical waveguide film on the first holding member so that light emitted from the light emitting device is coupled to an incident end surface of the optical waveguide. An optical reception unit holds a second end portion of the optical waveguide film on the second holding member so that light emitted from an emitting end surface of the optical waveguide is received by the light receiving device. At least the optical waveguide film is covered with flame-retardant resin having flame retardancy of HB or higher according to a UL-94 test and a minimum bending radius of the optical waveguide film covered with the flame-retardant resin and having a flame-retardant resin layer formed on its surface is from 1 mm to 3 mm.