Abstract: An optical waveguide film includes: an optical waveguide film main body including an optical waveguide core through which light travels and a cladding portion that encloses the optical waveguide core and has a lower refractive index than that of the optical waveguide core; and a marking member that is disposed at least at a portion of a principal surface of the optical waveguide film main body so as to protrude from the principal surface and that includes, at a surface thereof, a groove-shaped mark for positioning.

Abstract: An optical waveguide includes: a core portion through which light propagates, a cladding portion enclosing the core portion along a direction of light propagation, and a colored resin for position recognition marking, the optical waveguide having substantially planar outer surfaces including principal surfaces thereof, and the colored resin being embedded in the optical waveguide at a position that does not substantially overlap the core portion when viewed from a direction perpendicular to a principal surface of the optical waveguide and does not substantially contact the core portion.

Abstract: An optical waveguide film includes: an optical waveguide film main body including an optical waveguide core through which light travels and a cladding portion that surrounds the optical waveguide core and has a lower refractive index than that of the optical waveguide core; an electric wiring portion including silver or a silver alloy and formed on at least a part of a principal surface of the optical waveguide film main body; and a protective layer including a titanium layer or a titanium alloy layer and disposed to cover the electric wiring portion.

Abstract: An optical waveguide includes: an optical waveguide core through which light propagates, at least one end portion of the optical waveguide core in a longitudinal direction thereof having an inclined surface; a reflective layer provided on the inclined surface and formed by a metal layer of silver or a silver alloy; a protective layer disposed to cover the reflective layer; and a cladding portion enclosing the optical waveguide core and having a lower refractive index than that of the optical waveguide core.

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.

Abstract: There is provided an optical waveguide including: a waveguide core through which light propagates; a cavity that is present inside the waveguide core so as to be open at least one end in the thickness direction of the waveguide core; a layer-form first cladding having a lower refractive index than the waveguide core, and sealing at least one of the at least one opening of the cavity to thereby close the opening of the cavity; and a second cladding having a lower refractive index than the waveguide core, and surrounding the waveguide core. There is also provided a method of manufacturing the optical waveguide.

Abstract: An optical waveguide comprises: a core for propagating light; a clad covering the core; and a line convex part extending along a line different from the core, the line convex part comprising a cavity used as a positioning mark inside the line convex part.

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: 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: 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.