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 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: A production method of an optical waveguide includes: preparing a laminated body that includes a first clad layer and, on the first clad layer, a core layer and a second clad layer alternately laminated in this order so that two or more of the core layer are included in the laminated body; forming a light-propagating waveguide core by cutting the laminated body so as to reach but not cut through the first clad layer from a side where the core layer and the second clad layer are laminated; and embedding at least a cut portion of the laminated body with a third clad layer.

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: An optical transmission module includes: a substrate; an electric wiring section that is provided on the substrate; a photoelectric element that are mounted on the electric wiring section, and that emits an optical signal on the basis of a received electric signal or transmits an electric signal on the basis of a received optical signal; an optical part that comprises at least one of an optical conversion section and an optical fiber receptacle section, and that controls an optical path of optical signal between the photoelectric element and an optical fiber; a mounting support member that positions the photoelectric element; and a positioning mechanism that positions the optical part and the mounting support member.

Abstract: The invention relates to a method for producing a polymeric optical waveguide-forming master plate, comprising: laying a thread which does not transmit rays used for subsequent exposure on a substrate for a master plate, applying a positive resist material onto the substrate to have a thickness such that, when parallel rays are vertically radiated onto the resist from a side opposite to a substrate side with respect to the thread and then the resist is developed, a layer made of the resist is formed at whole space where the rays have not been radiated; radiating parallel rays substantially vertically to the substrate to expose the resist to the rays; and developing the exposed resist on the substrate to form a convex portion corresponding to a shape of an optical waveguide core, to waveguide production methods using the same, and to the resultant waveguide.

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 module comprises: a surface-type optical element having at least one of a light emitting face and a light receiving face on the back of a mounting face; an optical waveguide for transmitting light in the direction of a normal line of the mounting face; and a mounting portion having an element positioning portion for positioning the surface-type optical element and an optical waveguide positioning portion for positioning the optical waveguide, the mounting portion being mounted with the surface-type optical element and the optical waveguide.

Abstract: The present invention provides a bidirectional communication optical waveguide which can adopt a configuration in which light sources having the same wavelengths are used and stray light is not inputted to either a light emitting device or a light receiving device, and the bidirectional communication optical waveguide realizes a bidirectional communication module. The bidirectional communication optical waveguide includes a main waveguide core and a sub-waveguide core. A main inclined plane is provided in a midway of an optical path in the main waveguide core.

Abstract: An optical waveguide film that can supply power at extremely low cost, and a light transmission and reception module using this film are provided. A macromolecular optical waveguide film is composed of a square-shaped waveguide core which extends in a film length direction, a conductive wires which extends in the film length direction and is arranged in parallel with the waveguide core, and a cladding which surrounds the waveguide core and the conductive wire. The two conductive wires are provided, and the waveguide core is provided between the two conductive wires.

Abstract: A sub-mount includes a recess for holding a polymer optical waveguide film and recesses for embedding and holding a light emitting element and a light detecting element. The sub-mount further has an adhesive filling groove formed adjacent to respective recesses. When mounting the polymer optical waveguide film, the light emitting element, and the light detecting element onto the sub-mount, an adhesive is accurately applied and is prevented from flowing out as the adhesive filling grooves are provided.

Abstract: A light transmission and reception module includes: a belt-shaped macromolecular optical waveguide film having an optical waveguide, an optical transmitter having a light emitting element and a first sub-mount for holding the light emitting element, for holding one end of the macromolecular optical waveguide film on the first sub-mount so that a light emitted from the light emitting element may be coupled to an incident end surface of the optical waveguide, and an optical receiver having a light detecting element and a second sub-mount for holding the light detecting element, for holding the other end of the macromolecular optical waveguide film on the second sub-mount so that the light emitted from an exit end surface of the optical waveguide may be received in the light detecting element.

Abstract: The invention provides a laminated optical waveguide film in which a plurality of waveguide cores are formed, and a plurality of end surfaces at which the waveguide cores are exposed are formed, wherein, among the plurality of end surfaces, a first end surface has waveguide core end surfaces laminated in a thickness direction, and a second end surface has waveguide core end surfaces arranged in parallel. The invention also provides a method for producing the optical guide film, and an optical module using the optical guide film.

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: 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: A method of producing a polymer optical waveguide, including: preparing a mold; preparing a lower film base material; introducing a core-forming curable resin into a first through-hole of the mold with which the lower film base material is brought into close contact while sucking the concave portion of the mold from a second through-hole under reduced pressure to introduce the core-forming curable resin into the concave portion of the mold; curing the core-forming curable resin which has been introduced; removing the mold from the lower film base material; providing a clad-forming curable resin layer and an upper film base material, the clad-forming curable resin layer being sandwiched between the lower film base material, on which the core is formed, and the upper film base material; and curing the clad-forming curable resin layer to fix the lower film base material and the upper film base material.

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: The present invention provides an optical waveguide, which at least includes: a waveguide core having a cavity therein; and a clad which encloses the periphery of the waveguide core and has a smaller refractive index than the waveguide core, wherein the optical waveguide changes a direction of a part or all of propagated light by using a part or all of an interface between the waveguide core and the cavity as a reflecting surface. The present invention further provides a method for manufacturing the optical waveguide, which at least includes: forming a core having a cavity therein on a substrate; applying an uncured clad material to a side surface and an upper portion of the core while maintaining the cavity which allows an atmospheric gas to be present in the cavity; and curing the clad material by heat or light to seal the gas in the cavity.

Abstract: An optical transmission module includes: a substrate; an electric wiring section that is provided on the substrate; a photoelectric element that are mounted on the electric wiring section, and that emits an optical signal on the basis of a received electric signal or transmits an electric signal on the basis of a received optical signal; an optical part that comprises at least one of an optical conversion section and an optical fiber receptacle section, and that controls an optical path of optical signal between the photoelectric element and an optical fiber; a mounting support member that positions the photoelectric element; and a positioning mechanism that positions the optical part and the mounting support member.

Abstract: The present invention provides a process for producing a polymer optical waveguide, comprising the steps of: preparing a mold comprising a concave portion; bringing a substrate into contact with the mold, filling the concave portion with a core-forming curable resin; curing the core-forming curable resin in the concave portion; removing the mold from the substrate; and forming a clad layer on the substrate; wherein the mold comprises a cured resin layer and a reinforcing member, the cured resin layer has the concave portion, the reinforcing member has an introduction portion which communicates with the concave portion and an injection inlet which communicates with the introduction portion, and a discharge portion which communicates with the concave portion is provided in the reinforcing member, the cured resin layer and/or a space between the cured resin layer and the reinforcing member, and a resin injecting device which is used in the process.