Abstract: An optical module including: a photonic integrated chip in which an optical circuit is formed; an electronic integrated chip that drives the photonic integrated chip; and an interposer that electrically couples the photonic integrated chip and the electronic integrated chip, wherein the photonic integrated chip is arranged on a side of a first main surface of the interposer, and the electronic integrated chip is arranged on a side of a second main surface on an opposite side of the first main surface, and the interposer includes a power supply layer, a first power supply via coupled to the power supply layer and configured to supply a first power supply voltage to the photonic integrated chip, and a second power supply via coupled to the power supply layer and configured to supply a second power supply voltage to the electronic integrated chip.

Abstract: A wavelength demultiplexer includes a photonic circuit and a control circuit that adjusts wavelength characteristics of the photonic circuit. The photonic circuit converts two orthogonal polarized waves contained in the incident light into two same polarized waves, which are supplied to a first optical demultiplexing circuit and a second optical demultiplexing circuit provided in the photonic circuit and having the same configuration. The photonic circuit supplies a total output power of monitor lights extracted from the same positions in the first optical demultiplexing circuit and the second optical demultiplexing circuit to the control circuit. The control circuit controls a first wavelength characteristic of the first optical demultiplexing circuit and a second wavelength characteristic of the second optical demultiplexing circuit based on the total output power of the monitor lights.

Abstract: A wavelength demultiplexer includes a photonic circuit and a control circuit that adjusts wavelength characteristics of the photonic circuit. The photonic circuit converts two orthogonal polarized waves contained in the incident light into two same polarized waves, which are supplied to a first optical demultiplexing circuit and a second optical demultiplexing circuit provided in the photonic circuit and having the same configuration. The photonic circuit supplies a total output power of monitor lights extracted from the same positions in the first optical demultiplexing circuit and the second optical demultiplexing circuit to the control circuit. The control circuit controls a first wavelength characteristic of the first optical demultiplexing circuit and a second wavelength characteristic of the second optical demultiplexing circuit based on the total output power of the monitor lights.

Abstract: An optical module includes a circuit board having, an electronic circuit formed therein and an optical circuit mounted thereon, and coupled to a first end of an inner optical fiber, a connector assembly to which a second end of the inner optical fiber is fixed, and a housing including a first housing including a slid surface on which a sliding surface included in the connector assembly slides so as to position the connector assembly, a second housing including an engaging protrusion engaged with the positioned connector assembly so as to fix the connector assembly, the second housing being bonded to the first housing and the housing being mounted with the circuit board.

Abstract: An optical branching waveguide disclosed herein includes: a substrate; a first optical waveguide provided on the substrate; a second optical waveguide provided on the substrate and arranged close to the first optical waveguide; and a cladding layer covering either one of a first portion of the first optical waveguide and a second portion of the second optical waveguide and including an opening the other one of the first portion and the second portion. The effective refractive index of the first optical waveguide at the first portion and the effective refractive index of the second optical waveguide at the second portion become equal in either one of a state where resin is present in the opening and a state where the resin is not present in the opening.

Abstract: An optical module includes a circuit board having, an electronic circuit formed therein and an optical circuit mounted thereon, and coupled to a first end of an inner optical fiber, a connector assembly to which a second end of the inner optical fiber is fixed, and a housing including a first housing including a slid surface on which a sliding surface included in the connector assembly slides so as to position the connector assembly, a second housing including an engaging protrusion engaged with the positioned connector assembly so as to fix the connector assembly, the second housing being bonded to the first housing and the housing being mounted with the circuit board.

Abstract: An optical branching waveguide disclosed herein includes: a substrate; a first optical waveguide provided on the substrate; a second optical waveguide provided on the substrate and arranged close to the first optical waveguide; and a cladding layer covering either one of a first portion of the first optical waveguide and a second portion of the second optical waveguide and including an opening the other one of the first portion and the second portion. The effective refractive index of the first optical waveguide at the first portion and the effective refractive index of the second optical waveguide at the second portion become equal in either one of a state where resin is present in the opening and a state where the resin is not present in the opening.

Abstract: The invention relates to a grating coupler and an optical waveguide device having a stripe width that can be easily realized where light is transferred by means of a beam of which the form is close to that of a Gaussian beam. A striped member that becomes a grating and that is formed of a material of which the refractive index is different from that of the core layer is divided into a plurality of sections, and at the same time, the distance between the core layer and the surface of the striped member on the side opposite the surface that faces the core layer is different for each section.

Abstract: A wavelength multiplexer and de-multiplexer includes: a reflection member; a first port provided in the reflection member; a plurality of second ports provided in the reflection member to be spaced apart from the first port; and an optical filter on an optical path between the first port and the plurality of second ports, wherein a plurality of reflection surfaces inclined with respect to the optical filter are formed in the reflection member, a distance of a reflection point from the optical filter in each of the plurality of reflection surfaces becomes smaller as a reflection angle in each of the plurality of reflection surfaces is increased, and each of the plurality of second ports is positioned on a path of light reflected by each of the plurality of reflection surfaces.

Abstract: A wavelength multiplexer and de-multiplexer includes: a reflection member; a first port provided in the reflection member; a plurality of second ports provided in the reflection member to be spaced apart from the first port; and an optical filter on an optical path between the first port and the plurality of second ports, wherein a plurality of reflection surfaces inclined with respect to the optical filter are formed in the reflection member, a distance of a reflection point from the optical filter in each of the plurality of reflection surfaces becomes smaller as a reflection angle in each of the plurality of reflection surfaces is increased, and each of the plurality of second ports is positioned on a path of light reflected by each of the plurality of reflection surfaces.

Abstract: The invention relates to a grating coupler and an optical waveguide device having a stripe width that can be easily realized where light is transferred by means of a beam of which the form is close to that of a Gaussian beam. A striped member that becomes a grating and that is formed of a material of which the refractive index is different from that of the core layer is divided into a plurality of sections, and at the same time, the distance between the core layer and the surface of the striped member on the side opposite the surface that faces the core layer is different for each section.

Abstract: An optically interconnected chip includes a first optical transmitter circuit, a first spot size converter connected by a first optical waveguide to the first optical transmitter circuit, a first optical receiver circuit, a second spot size converter connected by a second optical waveguide to the first optical receiver circuit, a rotator provided between the second spot size converter and the first optical receiver circuit and configured to rotate a direction of polarization of light propagating through the second optical waveguide by 45 degrees, and a splitter provided after the rotator and configured to separate the rotated light into components according to directions of polarization of the light, wherein the first spot size converter and the second spot size converter are coupled directly to each other on a wafer.

Abstract: Disclosed is an electronic apparatus including a circuit element including a first main surface, a first electrode provided in the first main surface, an optical element including a second main surface and being configured to either transmit or receive an optical signal, a second electrode provided in the second main surface, a window which is provided in the second main surface and through which the optical signal passes, a wiring layer provided on the first main surface and the second main surface, the wiring layer electrically connecting the first electrode and the second electrode, and an optical waveguide, which is provided on the second main surface and optically connected to the window, the optical signal passing through the optical waveguide.

Abstract: An optical waveguide component includes: an optical fiber mounting substrate provided with optical fiber alignment grooves having either, for alignment of optical fibers, V-grooves or inverted trapezoidal grooves in which inverted top sections of the V-grooves are truncated; an optical waveguide substrate in which optical waveguides are formed; a resin layer that is aligned and fixed in a state in which the optical fiber mounting substrate and the optical waveguide substrate are flush or have a predetermined amount of offset; and a transparent resin that is filled in a gap in which the optical fiber mounting substrate and the optical waveguide substrate face each other.

Abstract: An optically interconnected chip includes a first optical transmitter circuit, a first spot size converter connected by a first optical waveguide to the first optical transmitter circuit, a first optical receiver circuit, a second spot size converter connected by a second optical waveguide to the first optical receiver circuit, a rotator provided between the second spot size converter and the first optical receiver circuit and configured to rotate a direction of polarization of light propagating through the second optical waveguide by 45 degrees, and a splitter provided after the rotator and configured to separate the rotated light into components according to directions of polarization of the light, wherein the first spot size converter and the second spot size converter are coupled directly to each other on a wafer.

Abstract: An optical waveguide component includes: an optical fiber mounting substrate provided with optical fiber alignment grooves having either, for alignment of optical fibers, V-grooves or inverted trapezoidal grooves in which inverted top sections of the V-grooves are truncated; an optical waveguide substrate in which optical waveguides are formed; a resin layer that is aligned and fixed in a state in which the optical fiber mounting substrate and the optical waveguide substrate are flush or have a predetermined amount of offset; and a transparent resin that is filled in a gap in which the optical fiber mounting substrate and the optical waveguide substrate face each other.

Abstract: Disclosed is an electronic apparatus including a circuit element including a first main surface, a first electrode provided in the first main surface, an optical element including a second main surface and being configured to either transmit or receive an optical signal, a second electrode provided in the second main surface, a window which is provided in the second main surface and through which the optical signal passes, a wiring layer provided on the first main surface and the second main surface, the wiring layer electrically connecting the first electrode and the second electrode, and an optical waveguide, which is provided on the second main surface and optically connected to the window, the optical signal passing through the optical waveguide.

Abstract: An optical module with a first optical waveguide substrate having end faces; a second optical waveguide substrate which includes a first optical waveguide, a second optical waveguide, and end faces, the second optical waveguide substrate having an opening between the first optical waveguide and the second optical waveguide; and a first deflection device which is mounted in the opening, wherein one of the end faces of the first optical waveguide substrate and one of the end faces of the second optical waveguide substrate are coupled to each other.

Abstract: Disclosed is an optical waveguide structure capable of keeping intervals between the structure and optical elements within a certain range. When arranging a surface light emitting element and a surface light receiving element on a positioning plate provided on a substrate, elastic layers are provided between the elements and the plate. When fitting and fixing first projections of the structure in holes of the plate, second projections formed in a predetermined dimension on the structure are brought into contact with the light emitting element and the light receiving element. Therefore, intervals between lenses, and the light emitting element as well as the light receiving element are controlled within a certain range according to the dimension of the second projections. Further, stress occurring due to contact is dispersed by the elastic layers so that breakage of the light emitting element and the light receiving element can be prevented.

Abstract: An optical module with a plurality of optical waveguide substrates having element mounting openings and end surfaces which are adhered to each other with an optical adhesive; and a plurality of light deflecting element arrays mounted to the respective element mounting openings of the plurality of optical waveguide substrates, the plurality of light deflecting element arrays including a plurality of light deflecting elements.