Sumitomo Osaka Cement Co., Ltd.

Hideki Ichimei

Kei Kato

Norikazu Miyazaki

Yu Kataoka

Yuji Yamane

Ryo Shimizu

Toshio Kataoka

Kei Katou

Tetsuya Fujino

Minoru Shinozaki

Shinsuke Kanno

An object is to provide an optical device for which size reduction can be achieved, and for which an increase in manufacturing cost is suppressed. An optical device of the present invention is an optical device in which an optical component is accommodated inside a case, the optical device including an optical component fixing member OF on which the optical component is mounted, in which a side surface portion CS and a bottom surface portion CB of the case are joined, and the optical component fixing member OF abuts on the side surface portion CS and is joined to the bottom surface portion CB.

Optical device, optical modulation device and optical transmission device

An optical device includes a housing that accommodates at least an optical waveguide element, a main body portionof the housing having an opening portion OP on one surface and a lead pin PNfixed to a side surface adjacent to the one surface, and including a metal memberdisposed to surround the opening portion OP and a lid memberthat closes the opening portion OP and is joined to the metal member, in which end portions of the metal memberand the lid memberalong the side surface of the main body portionat which the lead pin PNis disposed are located on an inner side of the main body portionthan the side surface of the main body portion

Optical device and optical transmission apparatus using same

An optical modulator with which electrical connection between a signal electrode and signal wiring of a wiring substrate can be reliably made even in a case where a width of the signal electrode in an action portion of an optical control substrate is narrow is provided. An optical modulator includes an optical control substrate () that includes an optical waveguide (OW) including at least a branched waveguide which branches one light wave into two light waves, and that includes a control electrode for applying an electrical field to the branched waveguide, and a wiring substrate provided with a wiring which relays an electrical signal to be applied to the control electrode or with a wiring which terminates the electrical signal, in which the control electrode is provided with a signal electrode(S), the wiring is provided with signal wiring, and in a part (Sc) in which electrical connection is made between the signal electrode(S) and the signal wiring, a clearance (W) in which the branched waveguide (OW) sandwiches the signal electrode is wider than a clearance (W) in which the branched waveguide sandwiches the signal electrode in an action portion in which the control electrode applies the electrical field to the branched waveguide.

Optical modulator and optical transmission device using same

An optical modulator that suppresses poor welding between a case main body and a lid portion is provided. There is provided an optical modulator including: a case that is a rectangular parallelepiped and accommodates at least an optical waveguide element, in which the case includes a case main bodyin which one surface of the rectangular parallelepiped forms an opening portion, and a lid portionthat has a rectangular shape and that closes the opening portion, the lid portion includes a peripheral part that has a thin thickness, and a protruding partthat is formed on the lid portion excluding the peripheral part and that protrudes toward an inside of the case, and when the lid portion is fitted into the case main body, a distance between an inner peripheral side of an end surface forming the opening portion of the case main body and an outer edge of the protruding part is set such that a distance dformed on a short-side side of the lid portion is larger than a distance dformed on a long-side side of the lid portion.

An optical waveguide device includes a substrate on which an optical waveguide is formed, and a reinforcing block disposed on the substrate, along an end surface of the substrate on which an input portion or an output portion of the optical waveguide is disposed, in which an optical component that is joined to both the end surface of the substrate and an end surface of the reinforcing block is provided, a material used for a joining surface of the optical component and a material used for the substrate or the reinforcing block have at least different linear expansion coefficients of a direction parallel to the joining surface, and an area of the joining surface is set to be smaller than a maximum value of a total of areas of cross sections of the substrate and the reinforcing block parallel to the joining surface.

Optical waveguide device, and optical modulation device and optical transmission device using same

An optical waveguide device includes a substrate on which an optical waveguide is formed, and a reinforcing block disposed on the substrate, along an end surface of the substrate on which an input portion or an output portion of the optical waveguide is disposed, in which an optical component that is joined to both the end surface of the substrate and an end surface of the reinforcing block is provided, a material used for a joining surface of the optical component and a material used for the substrate or the reinforcing block have at least different linear expansion coefficients of a direction parallel to the joining surface, and an area of a joining portion of the optical component is set to be smaller than an area of the end surfaces including joining portions of the substrate and the reinforcing block.

An optical waveguide element includes an optical waveguide which is formed on one surface of a substrate, an incidence part for light to be incident on the optical waveguide or an emission part for emitting light from the optical waveguide which is disposed in an end portion of the substrate, and a dielectric film which is formed on the optical waveguide of at least one of the incidence part and the emission part, and the vicinity thereof. Regarding the dielectric film, dielectric films including a dielectric film formed of a first material having an index of refraction higher than an index of refraction of the substrate and a dielectric film formed of a second material having an index of refraction lower than the index of refraction of the substrate are alternately laminated.

Optical waveguide element and manufacturing method therefor

An optical waveguide device module includes an optical waveguide device and a connection substrate provided outside the optical waveguide device, and these are housed in a housing. The optical waveguide device has a control electrode including a signal electrode and ground electrodes disposed to interpose the signal electrode between the ground electrodes. A signal line, ground lines disposed so as to interpose the signal line between the ground lines, and a back surface ground electrode disposed on a surface of the connection substrate are provided on the connection substrate. The ground line and the back surface ground electrode are electrically connected through a via hole passing through the connection substrate. Electrical connection means for electrically connecting the ground line and the ground electrode is provided. A connection portion of the electrical connection means on the ground line side is in the vicinity of the via hole of the ground line.

Optical waveguide device module

An optical control element including an optical waveguide formed by using diffusion of titanium that is formed on a lithium niobate substrate and a control electrode formed on the lithium niobate substrate that is provided in the vicinity of the optical waveguide, in which an amount of a hydroxyl group absorbed into the lithium niobate substrate is set to be in a range of 0.5 to 2.5 cm.

Optical control element

An optical modulator is provided which can compensate for a bias shift between an output light and a monitoring light of the optical modulator and which has a configuration capable of being reduced in size with a simple structure. The optical modulator comprises a substrate that has an electro-optical effect, an optical waveguide that includes a Mach-Zehnder type optical waveguide formed in the substrate, a modulation electrode that modulates light waves propagating in the optical waveguide, an optical fiber that guides an output light from the optical waveguide, light collecting means for collecting two radiated lights from the Mach-Zehnder type optical waveguide toward a single optical receiving element, and light intensity ratio adjusting means for adjusting a light intensity ratio of the two radiated lights received by the optical receiving element.

Growing community of inventors

Tokyo, Japan

Hideki Ichimei