Patent application number | Description | Published |
20080292258 | OPTICAL DEVICE - The application relates to an optical device for enhancing the stress to be generated in a substrate in comparison with a conventional technique. To this end, the optical device includes a substrate having a photoelastic effect, a first stress layer formed on a first face of the substrate and having a pattern for generating stress which induces refraction index variation by the photoelastic effect in a partial region in the substrate, and a second stress layer formed on a second face which is a reverse face to the first face of the substrate and configured to generate stress for restoring the shape from the deformation caused by the stress generated in the substrate by the first stress layer in the substrate. | 11-27-2008 |
20090162014 | OPTICAL WAVEGUIDE DEVICE AND OPTICAL APPARATUS USING OPTICAL WAVEGUIDE DEVICE - According to an aspect of an embodiment, an optical waveguide; and a branching section which branches a part of a light propagating through the optical waveguide, wherein the branching section has a first coupler which branches the light propagating through the optical waveguide according to a given unequal branching ratio so as to output first and second branched lights, and uses the first branched light as a first output light; and a second coupler which inputs the second branched light output from the first coupler and branches the second branched light into two lights according to a branching ratio which is substantially equal to the branching ratio in the first coupler so as to output third and fourth branched lights, and uses the fourth branched light as a second output light. | 06-25-2009 |
20090175574 | Optical device - An optical device wherein an optical waveguide is formed on a dielectric substrate, the optical device includes an input part and an output part where the optical waveguide and corresponding optical fibers are connected. A stress layer is provided for at least one of the input part and the output part. The stress layer applies a stress to the optical waveguide so that an index of refraction of the optical waveguide is reduced. | 07-09-2009 |
20090324158 | Optical modulation device and manufacturing method thereof - An optical modulation device includes: a crystal substrate having an electro-optic effect; an optical waveguide formed in the crystal substrate; an electrode formed on the crystal substrate, to apply an electric field to the optical waveguide; and a buried layer of low dielectric constant buried to avoid the optical waveguide, in at least one portion of a lower region of the electrode inside the crystal substrate, which is spaced from both of a front surface of the crystal substrate on which the electrode is formed and a rear surface thereof opposed to the front surface. | 12-31-2009 |
20100027935 | OPTICAL DEVICE - The optical device includes a substrate having an electrooptic effect; a plurality of optical waveguides formed in the substrate in parallel to one another; and a polarization inversion region which is disposed a part of the substrate and which has a polarization characteristic that is an inverse to that of the substrate, wherein a profile of a boundary between the polarization inversion region and a remaining region in which the polarization is not inverted is configured such that accumulated amounts of distortion that affects the respective waveguides over coordinates along a light propagation direction are substantially identical. | 02-04-2010 |
20100080507 | OPTICAL DEVICE AND METHOD RELATED THERETO - An optical device includes an electrooptic crystal substrate, a polarization-inverted region formed in a part of the electrooptic crystal substrate, an optical waveguide formed in the electrooptic crystal substrate, and a groove for relaxing stress disposed between a domain wall of the polarization-inverted region and the optical waveguide. | 04-01-2010 |
20100166438 | OPTICAL INTERFEROMETER AND OPTICAL RECEIVER - An optical interferometer includes a substrate; a first and a second branch lines; a third and a fourth branch lines; a first interference portion for causing the first and the third branch lights to interfere with each other; and a second interference portion for causing the second and the fourth branch lights to interfere with each other; wherein each of the first and the third branch lines runs in the surface of the substrate such that the first and the third branch lines provide respective optical path lengths with a constant difference for a temperature change, and each of the second and the fourth branch lines runs in the surface such that the second and the fourth branch lines provide respective optical path lengths with a constant difference for a temperature change. | 07-01-2010 |
20100178064 | OPTICAL DEVICE AND OPTICAL TRANSMITTER - An optical device and an optical transmitter are provided. The optical device includes a substrate, a first optical waveguide that may be formed in the substrate and may have a bending portion, and a second optical waveguide that intersects with the bending portion of the first optical waveguide, wherein a groove may be formed outside the bending portion of the first optical waveguide in the substrate. | 07-15-2010 |
20100296152 | POLARIZATION CONTROLLER AND POLARIZATION MODE DISPERSION COMPENSATOR - A polarization controller includes a first polarization controller, a demultiplexer, a second polarization controller, and a multiplexer. The first polarization controller controls the state of polarization of input light such that a part of the wavelength components of the input light is in a first state of polarization. The demultiplexer demultiplexes the light output from the first polarization controller into a plurality of wavelength components. The second polarization controller controls the plurality of wavelength components in a second state of polarization by using liquid crystal modulation devices. The multiplexer multiplexes the plurality of wavelength components output from the second polarization controller. | 11-25-2010 |
20100310220 | Optical device - An optical device wherein an optical waveguide is formed on a dielectric substrate, the optical device includes an input part and an output part where the optical waveguide and corresponding optical fibers are connected. A stress layer is provided for at least one of the input part and the output part. The stress layer applies a stress to the optical waveguide so that an index of refraction of the optical waveguide is reduced. | 12-09-2010 |
20110108716 | OPTO-ELECTRONIC CIRCUIT BOARD AND MANUFACTURING METHOD FOR THE SAME - There is provided an opto-electronic circuit board that includes a first board, a second board coupled with the first board via solder, where the second board is mounted with an electronic circuit and a photoelectrical conversion device, and a wall disposed between an optical coupling portion and the solder. The optical coupling portion is for optically coupling an optical waveguide with the photoelectric conversion device, where the optical waveguide is formed in the first board. | 05-12-2011 |
20120002915 | Optical module and fabrication method - An optical module includes an optical waveguide that transmits and outputs signal light; a circuit board that transmits the signal light output from the optical waveguide, and includes a low refractive-index portion that neighbors and surrounds a transmissive portion and has a lower refractive index than the transmissive portion, which transmits the signal light; and a light-receiving element that includes, on a side toward the circuit board, a light-receiving portion that receives the signal light that has transmitted through the circuit board, where the signal light is reflected toward the light-receiving element at a boundary surface between the transmissive portion and the low refractive-index portion. | 01-05-2012 |
20120076454 | OPTICAL MODULE AND METHOD FOR MANUFACTURING THE SAME - A an optical module includes a circuit board provided with an optical element selected from a light-receiving element and/or a light-emitting element; a lens where light from the optical element passes through; an alignment mark serving as an indicator for alignment with the optical element; and an optical waveguide formed to input/output light into/from the optical element through the lens. | 03-29-2012 |