Omron Corporation

Yukari Terakawa

Hayami Hosokawa

Naru Yasuda

Yoshiyuki Komura

Kazuyuki Hayamizu

Masayoshi Higuchi

Toshiyuki Takahashi

Hiroto Nozawa

Yoshitaka Tatara

Hironobu Kiyomoto

Kenji Homma

Toshinari Mori

Junichi Tanaka

Akira Enami

Kentaro Hamana

Yoshihisa Ishida

Toshifumi Sumino

Keisuke Uno

Yasunari Kitajima

Hisashi Taniguchi

A light transmission path package includes first and sealing surface adjustment members, which are arranged with facing each other by way of a light emitting/receiving element on a lead frame substrate, having a length in a normal direction of the substrate surface from the substrate surface of H; wherein a relational expression H&#x3c;H&#x3c;His satisfied where the height His a distance in the normal line direction from the substrate surface to a surface of the light guide facing the substrate surface, and the height His a length in the normal line direction from the substrate surface in the light emitting/receiving element. The sealing resin is filled so as to cover the first and second sealing surface adjustment members and so as not to come in contact with the light transmission path.

Light transmission path package, light transmission module, electronic device and method for manufacturing light transmission module

A light guide includes a core and a clad made of a material having an index of refraction different from an index of refraction of the core and covering the core, in which at least one of a light incident surface or a light exit surface of the core is arranged while shifted in parallel without changing respective inclined angles so that the inclined surface is divided into a plurality of inclined surfaces parallel in a longitudinal direction (X direction) of the rectangular shape in the orthogonal projection and the plurality of inclined surfaces closer to the light emitting portion are positioned in a direction (Z direction) of moving away from the end face to be in a shape extending in the direction (Z direction) of moving away from the end face in a stepwise manner as a whole.

Optical waveguide, optical waveguide module, and electronic apparatus

A semiconductor laser drive apparatus comprises a bias current setting section () which sets a bias current value on the basis of the drive temperature so that the temperature characteristic of the bias current value with respect to the drive temperature may be a linear function having a slope except zero and a drive current setting section () for setting the drive current value on the basis of the drive temperature so that the temperature characteristic of the drive current value with respect to the drive temperature may be a function having a slope except zero. The temperature characteristic of the bias current and that of the drive current are functions different from each other. With this, low cost, space-saving, and power-saving of a semiconductor laser are achieved, and a semiconductor laser drive apparatus enabling a good transmission characteristic on the reception side and a high optical output over the whole drive temperature range when driving the semiconductor laser can be provided.

Semiconductor laser drive device, semiconductor laser drive method, light transmission device, optical wiring module, and electronic device

On a front wall of a mold resin () sealing a light emitter (), a direct emission region (), through which the light emitted from the light emitter () directly passes to the outside, and a total reflection region (), by which the light emitted from the light emitter () is totally reflected, are formed. The direct emission region () is formed into a shape of a convex lens. A light reflection portion () which is made of a concave mirror is provided on the rear face of the mold resin (). When a part of the light emitted from the light emitter () passes through the direct emission region (), it is affected by the lens to be emitted to the front direction. After another part of the light emitted from the light emitter () is totally reflected by the total reflection region (), it is reflected by the light reflection portion () to be emitted to the front direction through the total reflection region ().

Optical device and apparatus comprising the optical device

An optical wave guide device is manufactured by bonding an optical wave guide to an optical modulator through an upper cladding layer. The optical wave guide includes a glass substrate, a lower cladding layer and cores, and the optical modulator includes elements (heaters), which are disposed on the lower surface of a glass substrate, for modulating the light propagating in the cores, and electrodes and wire bond pads which are disposed on the front surface thereof. The elements are connected to the electrodes via through-holes. With this arrangement, there can be provided an optical waveguide device, in which cores are not degraded in manufacturing processes and elements for modulating the light propagating in the cores are unlikely to be exfoliated.

Optical waveguide device, method of manufacturing the same, and optical communication equipment

The spacersandand the recess is formed on the supporting substrateto support the upper cladding layer. The intermediate surfaceandlower than the top surface of the spacersandand higher than the inner bottom surface of the recess is formed on the supporting substrate. Each of the height between the top surface of the spacersandand the intermediate surfacesand, and the height between the intermediate surfacesandand the inner bottom surface of the recess of the second substratebecomes thin compared with the total thickness of the lower cladding layer. Thus, when the resin for the lower cladding layeris cured to shrinkage, the inner stress in the resin is dispersed and the occurrence of the wrinkleand the void decreases.

Optical waveguide device, manufacturing method for optical waveguide device and intermediate of optical waveguide device

This invention improves the use efficiency of light emitted by a solid light emitter such as a light emitting diode, and realizes a desired directional pattern. On a front boundary surface of a mold resinsealing a light emitter, there are formed a direct emission regionfor emitting the light from the light emitterand a total reflection regionfor totally reflecting the light from the light emitter. The direct emission regionis convex lens-shaped. A light reflecting portionhaving a concave mirror shape is disposed on a rear wall of the mold resin. A part of light emitted from the light emitteris emitted forward by receiving an optical lens action when it passes through the direct emission region. Another part of the light emitted by from the light emitteris totally reflected by the total reflection region, and is reflected by the light reflecting portion, and emitted forward from the total reflection region

Transparent optical component for light emitting/receiving elements

An optical waveguide device includes a first substrate, where the first substrate includes a first plate and an optical waveguide region disposed on the first plate, and where the optical waveguide region includes a core for transmitting light and a cladding surrounding the core. The optical waveguide device further includes a second substrate, where the second substrate includes a second plate having a spacer. Additionally, a surface including the optical waveguide region of the first substrate opposes a surface including the spacer of the second substrate, the spacer is formed the region which is out of the core of the first substrate, a top surface of the spacer is in contact with the first substrate, the first substrate and the second substrate are bound with adhesive material, and the entire surface of the core is in contact with the adhesive material.

Optical waveguide device, manufacturing method thereof and optical communication apparatus

Light of wavelengths &#x3bb;and &#x3bb;(&#x3bb;) is propagated in a first core. The light emitted form the first core is divided at a filter. That is, the light of the wavelength &#x3bb;transmits through the filter and is made incident onto a third core while the light of the wavelength &#x3bb;is reflected from a filter and is made incident onto a second core. The second core has a sectional area which works in a single mode for the light of the wavelength &#x3bb;and works in a multiple mode for the light of the wavelength &#x3bb;. It is therefore possible to prevent noise or stray light in an optical multiplexer/demultiplexer.

Optical multiplexer/demultiplexer

A method of manufacturing an optical waveguide device includes providing an optical fiber guide for fixing an optical fiber and optical element placing portions for providing element mounting benches outside a waveguide fixing region of a silicon substrate. A metallic thin film is formed outside the waveguide fixing region of the silicon substrate. After an optical waveguide substrate is bonded to a whole of an upper surface of the silicon substrate through a bonding resin which will become an upper cladding layer, the optical waveguide substrate is diced along an edge of the waveguide fixing region, and the optical waveguide substrate outside the waveguide fixing region is removed to expose the optical fiber guide and the optical element placing portions.

Optical waveguide device, manufacturing method thereof, and optical communication apparatus

An optical element that realizes light path conversion of transmitting light at low loss, allows easy incorporation of functions such as light convergence or the like, and can be easily made into a compact size includes upper and lower main surfaces of a light path converting element of a plane shape are facing each other, and a light incoming surface and a light outgoing surface are adjacent surfaces at about 90 degrees. A curved light path converting surface is formed so as to face the light incoming surface and the light outgoing surface. Light coming in from the light incoming surface repeats full reflection between the upper main surface and the lower main surface and goes on, and is reflected by the light path converting surface, thereby the light path thereof is converted, and light is ejected from the light outgoing surface.

Optical element and optical device using the same

An optical wave guide has a lower cladding layer formed on a substrate, and a Y-branched optical wave guide arranged on the lower cladding layer. The optical wave guide is covered with an upper cladding layer. Curved portions of the optical wave guide are tapered at the external circumferential sides and formed into a trapezoidal cross sectional shape, and effective refractive index of the optical wave guide is made small at the tapered external circumferential sides. Meanwhile, end surfaces of the optical wave guide are formed into a rectangular shape, thereby joint efficiency with optical fibers is increased.

Optical wave guide, an optical component and an optical switch

A second light guide is formed by filling, with a core material, a groove that is formed on the top surface of a reception-side substrate. A first light guide is formed by filling, with a core material, a groove that is formed on the bottom surface of a sending-side substrate. The reception-side substrate and the sending-side substrate are bonded to each other with a cladding layer interposed in between so that the second light guide and the first light guide are isolated from each other optically.

Optical device, and optical transceiver and other optical apparatuses using the optical device

In an optical waveguide device, a rectangle, which uses a filter insertion groove as its diagonal line and uses points on filter insertion grooves adjacent to the above filter insertion groove as its apexes, is assumed as a unit rectangle, and the size of the optical waveguide device is set to an integer multiple of the unit rectangle. In this case, even if filter insertion grooves are formed in a state in which a plurality of the optical waveguide devices are disposed in matrix, the respective optical waveguide devices can be formed in the same shape. Further, the filter insertion grooves formed to the respective optical waveguide devices do not divide portions other than the target portion of other optical waveguide devices. Therefore, the manufacturing processes of the optical waveguide device can be simplified and are suitable for mass production, and manufacturing cost can be suppressed thereby.

Method for manufacturing optical waveguide and optical waveguide device, optical waveguide device and optical waveguide, and optical communication apparatus using optical waveguide device

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Kyoto, Japan

Yukari Terakawa