Abstract: An optical module includes: a base having a predetermined product of a coefficient of linear expansion and a Young's modulus; a planar lightwave circuit element mounted on the base; and a warpage suppression component, which is mounted on a surface of the planar lightwave circuit element, the surface being on a side opposite to a side where the planar lightwave circuit element is mounted on the base, having a product of a coefficient of linear expansion and a Young's modulus that reduces warpage of the planar lightwave circuit element in accordance with warpage of the base depending on temperature change.

Abstract: A storage container includes: a substrate having a plurality of storage wells to store an object therein, the storage wells being formed on a predetermined substrate surface of the substrate. Further, the storage wells each includes an opening forming portion forming an opening portion opening on the substrate surface, and having an inclined surface that inclines from the substrate surface downward in a depth direction on an inner surface of the opening portion; and a bottomed storage portion that has a side wall surface extending in a direction perpendicular to the substrate surface on a lower side in the depth direction of the storage well relative to the opening forming portion, and that communicates with a region on the substrate surface through the opening portion, and a lower end of the inclined surface is connected to the side wall surface of the storage portion, forming a ridgeline.

Abstract: An optical module includes: a substrate and a waveguide element having a mount face opposed to the substrate, the waveguide element having an interference waveguide portion having an optical interference function. Further, the mount face includes a projection region to which the interference waveguide portion is projected on the mount face and a non-projection region, and the waveguide element is joined to the substrate with a joint material in the non-projection region.

Abstract: A semiconductor device includes: a signal input circuit that receives a signal from an outside; a signal output circuit that outputs the signal to the outside; a coupling element connected between the signal input circuit and the signal output circuit; an inspection output circuit that causes the signal input circuit to output an inspection signal to the outside not via the coupling element or an inspection input circuit that causes the signal output circuit to receive the inspection signal from the outside not via the coupling element. The signal input circuit, the signal output circuit, and the coupling element are formed on a semiconductor chip and packaged.

Abstract: A cross optical waveguide structure includes a first optical waveguide, a second optical waveguide, and an intersection portion positioned in the same plane. The first optical waveguide includes a first fixed-width portion, a second fixed-width portion, a first tapering portion, and a second tapering portion. The second optical waveguide includes a third fixed-width portion, a fourth fixed-width portion, a third tapering portion, and a fourth tapering portion. The intersection portion is linked to the first to the fourth tapering portions having such a tapering shape that a mode field radius of the light input to the first fixed-width portion, the second fixed-width portion, or the third fixed-width portion, and the fourth fixed-width portion is reduced by the first tapering portion, the second tapering portion, the third tapering portion, the fourth tapering portion, respectively, and the light is collected in the intersection portion.

Abstract: An optical fiber terminal structure is comprised of a plurality of optical fibers, a plurality of high-? optical fibers connected to the optical fibers, respectively, and a capillary. The capillary has a hole in which the optical fibers and the high-? optical fibers are inserted, and the optical fibers and the high-? optical fibers together are fixed in the hole. Connection parts of each of the optical fibers and the high-? optical fibers are also positioned inside the capillary, and end surfaces of the high-? optical fibers are exposed so that adjacent high-? optical fibers are in contact with each other in an end surface of the capillary.

Abstract: An electronic apparatus includes a flexible printed circuit board having a main body on which wiring pattern is formed, a connector having a connection terminal connected to the wiring constituting the wiring pattern, and a base body on which the connection terminal is fixed, and a casing. The main body is attached to the casing to be movable, the flexible printed circuit board has an extension part protruding from the main body and extending along with a ground included in the wiring pattern, the extension part bends in the middle of extending to be capable of expansion and contraction, and has a mounting part fixed to the casing on the tip side thereof, the mounting part is provided with a ground terminal connected to the ground extended, and the ground terminal is electrically connected to the casing in the state that the mounting part is fixed to the casing.

Abstract: A ring resonator filter, that is formed of a silica-based planar lightwave circuit, includes a core and a clad, the core including two arm units, a ring-like unit, and two optical coupling/branching units that optically couple the two arm units with the ring-like unit, and the optical coupling/branching units having a branch ratio that is either larger than 0% and less than 50% or larger than 50% and less than 100%.

Abstract: A semiconductor device includes: a signal input circuit that receives a signal from an outside; a signal output circuit that outputs the signal to the outside; a coupling element connected between the signal input circuit and the signal output circuit; an inspection output circuit that causes the signal input circuit to output an inspection signal to the outside not via the coupling element or an inspection input circuit that causes the signal output circuit to receive the inspection signal from the outside not via the coupling element. The signal input circuit, the signal output circuit, and the coupling element are formed on a semiconductor chip and packaged.

Abstract: A light polarizing element include: a first port waveguide; two second port waveguides; and a multi-mode interference waveguide optically connected to the first port waveguide and the two second port waveguides, the multi-mode interference waveguide having at least one slit formed therein, the at least one slit having a shape that enables the multi-mode interference wave guide to give different effective refractive indexes to respective mutually orthogonal polarized light waves input from the first port waveguide, thereby separating the mutually orthogonal polarized light waves, and that enables the separated mutually orthogonal polarized light waves to be output from the respective two second port waveguides.

Abstract: An optical module includes a single-mode optical fiber; a high relative refractive-index difference optical fiber having a larger core-to-cladding relative refractive-index difference than that of the single-mode optical fiber fusion-spliced to a first end of the high relative refractive-index difference optical fiber; a planar lightwave circuit that includes an optical waveguide having a core of quartz-based glass doped with a refractive-index raising dopant and a cladding of quartz-based glass, and is connected at a first end thereof to a second end, opposite to the first end, of the high relative refractive-index difference optical fiber; and a silicon thin-wire waveguide element that includes a silicon thin-wire waveguide having a silicon core and a cladding whose refractive index lower than that of the silicon core, and is connected to a second end, opposite to the first end, of the optical waveguide of the planar lightwave circuit.

Abstract: An optical fiber terminal structure is comprised of a plurality of optical fibers, a plurality of high-? optical fibers connected to the optical fibers, respectively, and a capillary. The capillary has a hole in which the optical fibers and the high-? optical fibers are inserted, and the optical fibers and the high-? optical fibers together are fixed in the hole. Connection parts of each of the optical fibers and the high-? optical fibers are also positioned inside the capillary, and end surfaces of the high-? optical fibers are exposed so that adjacent high-? optical fibers are in contact with each other in an end surface of the capillary.

Abstract: A disclosed optical waveguide element includes a cladding portion formed on a substrate; an optical waveguide which is formed inside the cladding portion and has a refractive index higher than that of the cladding portion; an optical filter which is inserted into a slit formed in the cladding portion to divide the optical waveguide into a first optical waveguide and a second optical waveguide; and a first thin film element which is inserted into the slit along with the optical filter and is provided with a first thin film lens, wherein the first thin film lens provided in the first thin film element converges light that has propagated through the first optical waveguide and outputs into the slit into the second optical waveguide.

Abstract: An optical waveguide circuit device includes: an optical waveguide circuit including a cladding layer formed on a substrate and made from silica-based glass, and an optical waveguide formed within the cladding layer and made from silica-based glass; heaters formed over the cladding layer and the optical waveguide and configured to heat the optical waveguide; wiring line electrode layers formed over the cladding layer, each of the wiring line electrode layers being coupled to a corresponding heater of the heaters and configured to allow electrical power to be supplied to the coupled heater; and an insulating layer covering the cladding layer, the heaters, and the wiring line electrode layers. The wiring line electrode layers adjacent to each other in a plan view are formed in different wiring layers. The wiring line electrode layers adjacent to each other in the same wiring layer are spaced by at least a predetermined distance.

Abstract: A manufacturing method of an optical waveguide device that allows light to propagate through a core formed within a cladding formed on a substrate, the core having a higher refractive index than the cladding, includes: layering a first cladding-material layer for the cladding and a core-material layer for the core sequentially on the substrate; forming the layered core-material layer into the core having a waveguide shape, and removing a first part of the core, the first part being positioned at a portion where a slit is to be formed, to thereby form a gap in the core; layering a second cladding-material layer for the cladding to cover the first cladding-material layer and the core; and removing, by dry-etching, a second part of the first and second cladding-material layers, the second part being positioned at the portion where the slit is to be formed, to thereby form the slit.

Abstract: A cross optical waveguide structure includes a first optical waveguide, a second optical waveguide, and an intersection portion positioned in the same plane. The first optical waveguide includes a first fixed-width portion, a second fixed-width portion, a first tapering portion, and a second tapering portion. The second optical waveguide includes a third fixed-width portion, a fourth fixed-width portion, a third tapering portion, and a fourth tapering portion. The intersection portion is linked to the first to the fourth tapering portions having such a tapering shape that a mode field radius of the light input to the first fixed-width portion, the second fixed-width portion, or the third fixed-width portion, and the fourth fixed-width portion is reduced by the first tapering portion, the second tapering portion, the third tapering portion, the fourth tapering portion, respectively, and the light is collected in the intersection portion.

Abstract: An optical waveguide structure includes: a cladding; a first core in the cladding having a first end surface; a second core in the cladding having a second end surface; slit formed horizontally with respect to a waveguide direction of the light to be waveguided by the first and second cores; and a first part and a second part composed of a material identical to a material of the cladding, wherein a pair of the first and second end surfaces disposed opposing each other with the slit interposed between the pair of the first and second end surfaces, the first part is interposed between the first end surface and the slit, and the second part is interposed between the second end surface and the slit.

Abstract: A cubicle unit includes a first illumination apparatus, a second illumination apparatus, a sensor, and a controller. When a brightness sensed by the sensor is a predetermined brightness or less, the controller causes the second illumination apparatus to emit light having a first color temperature lower than a color temperature of light emitted by the first illumination apparatus. When the brightness sensed by the sensor is greater than the predetermined brightness, the controller causes the second illumination apparatus to emit light having a second color temperature lower than the first color temperature.

Abstract: An illumination system includes: an illumination device; a time setter that sets a target time; and a controller that controls a color temperature of light emitted by the illumination device. The controller determines a target color temperature according to the target time, and causes the color temperature of the light emitted by the illumination device to be the target color temperature at the target time.

Abstract: A disclosed optical waveguide element includes a cladding portion formed on a substrate; an optical waveguide which is formed inside the cladding portion and has a refractive index higher than that of the cladding portion; an optical filter which is inserted into a slit formed in the cladding portion to divide the optical waveguide into a first optical waveguide and a second optical waveguide; and a first thin film element which is inserted into the slit along with the optical filter and is provided with a first thin film lens, wherein the first thin film lens provided in the first thin film element converges light that has propagated through the first optical waveguide and outputs into the slit into the second optical waveguide.