Patent application number | Description | Published |
20080232409 | Tunable Laser - [Problems] To provide a tunable laser with high reliability and high performance, and of low cost. | 09-25-2008 |
20080240646 | OPTICAL DEVICE AND MANUFACTURING METHOD THEREOF - An optical device includes: a substrate side waveguide formed on a substrate; and a plurality of optical elements fixed on the substrate. The substrate side waveguide and an optical element side waveguide formed in each of the plurality of optical elements forms a continuous optical waveguide path. | 10-02-2008 |
20080300334 | Thermoplastic Resin Foam - A thermoplastic resin foam which has both high reflectance and superior shape-retention properties, suitable for use in backlights and illumination boxes for illumination signboards, lighting fixtures, displays and the like. The thermoplastic resin foam is manufactured by a manufacturing method including a procedure for holding a resin sheet composed of thermoplastic resin (A) and thermoplastic resin (B), which has a functional group having an affinyty with thermoplastic resin (A), within a pressurized inert gas atmosphere to enable the resin sheet to contain inert gas, and a procedure for foaming by heating the resin sheet containing inert gas at a temperature higher than the softening temperature of thermoplastic resin, under normal pressure. | 12-04-2008 |
20090010592 | MOUNTING STRUCTURE OF SEMICONDUCTOR OPTICAL ELEMENT - To provide a mounting structure of a semiconductor optical element, in which structure the turning of a refractive index matching gel is prevented. There is provided a mounting structure of a light emitting element, in which structure signal light emitted from one end of an SOA | 01-08-2009 |
20090122817 | VARIABLE-WAVELENGTH FILTER AND VARIABLE-WAVELENGTH LASER - Only the light at an overlapping wavelength of the transmission characteristics of at least two wavelength selecting filters is looped, and at least one of the wavelength selecting filters varies a selected wavelength. Since a loss due to the optical filters is small and there is not a loss caused by a highly reflecting film, the output of an external-resonator variable-wavelength laser can be increased. Optical circuit component ( | 05-14-2009 |
20090269971 | Electrical connector - An electrical connector to be connected to a flat conductive member includes a housing including an upper wall and a lower wall; a terminal including a contact portion for contacting with the flat conductive member; and an engaging protrusion for engaging the flat conductive member. The housing further includes a receptacle portion between the upper wall and the lower wall for receiving the flat conductive member. The upper wall includes a cut portion. The engaging protrusion is situated under the cut portion, so that an edge portion of the flat conductive member moves over the engaging protrusion and deforms into the cut portion when the flat conductive member is inserted into the receptacle portion. | 10-29-2009 |
20090285251 | PLANAR LIGHTWAVE CIRCUIT AND TUNABLE LASER DEVICE HAVING THE SAME - To prevent the property of an optical filter from being changed even if there is a change in a gap of directional couplers generated due to variations in manufacturing conditions so as to improve the yield. A tunable laser device includes a PLC and an SOA. The PLC includes: optical waveguides; an optical filter; a loop mirror; thin-film heaters; and asymmetrical MZIs. Optical coupling parts within the PLC are formed with the asymmetrical MZIs, so that there is no change generated in the property of the optical filter even if there is a change generated in a gap of the directional couplers due to variations in the manufacturing conditions. Therefore, the yield can be improved. | 11-19-2009 |
20110013654 | WAVELENGTH VARIABLE LASER DEVICE, AND METHOD AND PROGRAM FOR CONTROLLING THE SAME - Provided is a wavelength variable laser device wherein an SOA is simplified. The wavelength variable laser device includes: an optical filter formed on a PLC; an SOA that supplies light to the optical filter; a light reflecting section that returns the light transmitted through the optical filter to the SOA via the optical filter; optical waveguides which are formed on the PLC and connect the SOA, the optical filter, and the light reflecting section; a wavelength variable section that changes a wavelength of the light transmitting through the optical filter; and a phase variable section that changes a phase of the light propagated on the optical waveguides. | 01-20-2011 |
20110019961 | OPTICAL MIXER - When a waveguide of second signal light outputted from a first optical coupler intersects a waveguide of first local light outputted from a second optical coupler, a waveguide of a first signal light outputted from the first optical coupler and a waveguide of a second local light outputted from the second optical coupler are each provided with a loss compensation intersecting waveguide that compensates for loss that occurs when the waveguide of the second signal light outputted from the first optical coupler intersects the waveguide of the first local light outputted from the second optical coupler. | 01-27-2011 |
20110194572 | COMPOSITE OPTICAL WAVEGUIDE, VARIABLE-WAVELENGTH LASER, AND METHOD OF OSCILLATING LASER - A composite optical waveguide | 08-11-2011 |
20120027041 | WAVELENGTH VARIABLE LASER AND A MANUFACTURING METHOD THEREOF - A wavelength variable laser includes: a substrate on which an optical coupler is formed as a planar optical waveguide; a DFB array part arranged on the substrate and having DFB laser elements respectively supply optical signals to the optical coupler; and an SOA part arranged on the substrate and having an SOA element configured to amplify an optical signal outputted from the optical coupler. The DFB array part and the SOA part are respectively formed in chips having a same lamination structure to each other. A wavelength variable laser and a modulator integrated wavelength variable laser with high yield ratio can be provided. | 02-02-2012 |
20140086595 | OPTICAL MIXER, OPTICAL RECEIVER, OPTICAL MIXING METHOD AND PRODUCTION METHOD FOR OPTICAL MIXER - In order to provide a high performance optical mixer having good yield, an optical mixer comprises: a first light branching means that branches a first input light into a plurality of first lights including a first output light and a second output light, and outputs the first lights; a second light branching means that branches a second input light into a plurality of second lights including a third output light and a fourth output light, and outputs the second lights; and a first light coupling and branching means and a second light coupling and branching means that couple the first and the third output lights and the second and the fourth output lights respectively, and branching the coupled lights into at least two, and outputting each of the branched lights as a coupled-and-branched light, wherein propagation paths for the third and the fourth output lights comprise widths that cause a prescribed optical path length difference to occur between the third and the fourth output lights, and propagation path lengths for the first and the second output lights are approximately equal and propagation path lengths for the third and the fourth output lights are approximately equal. | 03-27-2014 |
20150078749 | PLANAR LIGHTWAVE CIRCUIT AND OPTICAL RECEIVER - A planar lightwave circuit includes a substrate in which a groove being formed, the groove dividing the substrate into a first area and a second area; a first filter, a second filter, and a third filter intruded into the groove; as are formed in the first area, a first and a second waveguides formed to guide signal light and local oscillation light; a third and a fourth waveguides formed to guide signal light and local oscillation light; a first 90-degree optical hybrid; as are formed in the second area, a fifth and sixth waveguides formed to guide signal light and local oscillation light; and a second 90-degree optical hybrid. | 03-19-2015 |