| Patent application number | Description | Published |
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| 20090015904 | Optical deflector - An optical deflector made of an electro-optic material has one or more pairs of electrodes on opposite surfaces. Each pair of electrodes defines an interaction region in which an electric field applied from the electrodes produces a linear refractive-index gradient in the direction of the electric field. An incident light beam is refracted in this direction within the interaction region. The interaction region is shaped so that the light beam is also refracted in an orthogonal direction when it enters or leaves the interaction region. The light beam is thereby deflected three-dimensionally. | 01-15-2009 |
| 20090202247 | Optical multiplexing/demultiplexing device - In an optical multiplexing/demultiplexing device are arranged in parallel and disposed on a substrate. The optical multiplexing/demultiplexing device is disposed with three or more Mach-Zehnder interferometers between the first and second optical input/output ports. The optical multiplexing/demultiplexing device divides, by wavelength, multiplexed light comprising first light and second light whose wavelengths are different and which are input to one of the first optical input/output ports and outputs the multiplexed light from each of the second optical input/output ports. The absolute value of an optical path difference ΔL of each the Mach-Zehnder interferometers is constant. The optical multiplexing/demultiplexing device includes one or more each of a pair of two successive Mach-Zehnder interferometers where the sum of their optical path differences becomes +2 ΔL or −2 ΔL and a pair of two successive Mach-Zehnder interferometers where the sum of their optical path differences becomes 0. | 08-13-2009 |
| 20090209750 | Organic compound synthesizer and method for synthesizing organic compounds - An organic compound synthesizer for synthesizing organic compounds contains at least one type of polymerizable repeat unit and includes a substrate for organic compound synthesis. A liquid supply unit is configured to supply a reaction liquid containing compounds necessary for the synthesis of organic compounds and a reaction liquid containing a thermal acid generator for generating protons by heating. A substrate heater is configured to selectively heat a specific portion of said substrate for organic compound synthesis to thereby heat the reaction liquid containing a thermal acid generator. | 08-20-2009 |
| 20090214218 | Optical buffer device - An optical buffer device includes plural optical memory elements that are capable of holding light and an optical delay element. The plural optical memory elements are arranged on an optical path through which signal light and control light propagate in mutually opposite directions. Further, the optical delay element is disposed between the optical memory elements that are adjacent to each other. The optical delay element imparts different delays to the signal light and the control light. According to a preferred exemplary embodiment of this optical buffer device, each of the optical memory elements includes an optical waveguide through which the signal light and the control light propagate and an optical resonator that is disposed in proximity to this optical waveguide, and a coupling between the optical waveguide and the optical resonator is generated or cancelled depending on whether or not the control light is inputted. | 08-27-2009 |
| 20090323755 | Optical resonator and laser light source - An optical resonator includes an optical waveguide with a core surrounded by a clad of lower refractive index. The optical waveguide includes a non-terminated ring-type optical waveguide for resonant propagation of light and an input-output optical waveguide, unitarily coupled to the ring-type optical waveguide, for output of light from the ring-type optical waveguide, or input of light to and output of light from the optical ring waveguide. The ring-type optical waveguide and input-output optical waveguide can be formed simultaneously as silicon-wire waveguides. The unitary coupling simplifies fabrication of the optical resonator. | 12-31-2009 |
| 20100054663 | SPOT SIZE CONVERTER - A spot size converter has a first core, a larger second core, and a clad disposed on a substrate. The first core has a rectilinear cross-sectional shape and is embedded in the clad, except at its ends. One of these ends has a sloping surface along which the thickness of the first core tapers gradually to zero. The second core, which has a refractive index intermediate between the refractive indexes of the first core and clad, sits on the clad and covers the sloping end surface of the first core. Light propagates through the first core, then through the second core into an external optical device, or propagates from an external optical device through the second core into the first core. This arrangement provides a spot size converter having an easily manufacturable structure and no polarization dependency. | 03-04-2010 |
| 20100085991 | Optical resonator and tunable laser - An optical resonator has a Y-branched waveguide including first, second, and third optical waveguides interconnected at a single point. The first optical waveguide leads toward a reflector. The second and third optical waveguides are optically interconnected by a curved extension of the second and third optical waveguides, or by an independent ring waveguide to which the second and third optical waveguides are directionally coupled. At least one wavelength selector such as a Mach-Zehnder interferometer is formed in one or both of the second and third optical waveguides. This optical resonator is small in size and can be tuned by means of a single parameter. A tunable laser can be formed by inserting an optical amplifier between the first optical waveguide and the reflector. | 04-08-2010 |
| 20100092128 | Optical Transceiver module - An optical transceiver module includes a semiconductor laser that emits light along a first optical axis. A grating coupler, located in a plane including the first optical axis, diffracts the emitted light out of the plane and into an external optical system. A photodetector receives incoming light from the external optical system on a second optical axis that passes through the grating coupler at an angle to the plane. The photodetector can be placed parallel to the plane, directly above or below the grating coupler, to create an extremely compact optical transceiver module. | 04-15-2010 |
| 20100178005 | Optical device and mach-zehnder interferometer - There is provided an optical device including a first optical waveguide of a directional coupler, a second optical waveguide connected to the first optical waveguide and which guides light, and a common cladding of the first and second optical waveguides, wherein: the common cladding of the first and second optical waveguides includes a first cladding and a second cladding, the second cladding being provided on the first cladding and having a higher refractive index than the first cladding; the first optical waveguide and the second optical waveguide are formed continuously on the first cladding with a constant width and a constant height and are integrated with each other, and a cross sectional shape of each of the first and second optical waveguides is a rectangular shape that is longest in a direction orthogonal to a surface of the first cladding. | 07-15-2010 |
| 20100209045 | Optical resonator, and fluid optical sensor employing an optical resonator - There is provided an optical resonator including: N individual optical waveguide paths of line segment shape disposed in a common flat-plane so as to intersect at a single intersection region, wherein N is an integer of 2 or more; curved optical waveguide paths connecting respective portions of the optical waveguide paths that extend towards the outside from the intersection region, wherein for a first to a 2N | 08-19-2010 |
| 20110013195 | Polarization independent optical device - An optical device includes a core sandwiched between two clads. The core includes a planar waveguide layer with ridges protruding into one of the clads, forming a ridge waveguide structure that guides the propagation of light in the core. The core dimensions satisfy the following conditions: the ridge width is less than the total core height; the ridge height is less than the ridge width; the thickness of the planar waveguide layer is equal to or less than one-fourth of the total core height. Dimensions satisfying these conditions can be selected to provide polarization independent operation. The ridges may be arranged to define a pair of optical waveguides forming a Mach-Zehnder interferometer, an optical wavelength filter, or various other optical devices. | 01-20-2011 |
| 20110043817 | Polarization independent directional coupler and related optical devices - An optical device has two optical waveguides embedded in a clad. The optical waveguides are mutually parallel and are separated by a distance that allows optical coupling between them. The optical waveguides have identical square cross sectional shapes in a plane orthogonal to the direction of light propagation, so that light propagates through each optical waveguide without polarization dependence. The length of each side of the square cross section of the optical waveguides is determined from the refractive index of the clad and the distance between the longitudinal axes of the optical waveguides so that coupling between the two optical waveguides is also polarization independent for light with a wavelength of 1.49 micrometers, which is the longer of the two wavelengths used in optical subscriber networks. | 02-24-2011 |
