Patent application number | Description | Published |
20090052013 | THZ WAVE GENERATOR - The present invention purposes to provide a THz-wave generator capable of generating a THz-wave stably and efficiently, and particularly, to provide the THz-wave generator which is stable against a frequency shift of a laser source and which can easily vary the frequency of the THz-wave. | 02-26-2009 |
20090116781 | Optical Waveguide Device - It is an object of the invention to realize an optical waveguide device having multiple functions or high performance, to improve the productivity of products, and to provide an optical waveguide device capable of suppressing deterioration of an operating characteristic of the optical waveguide device. An optical waveguide device includes: a thin plate | 05-07-2009 |
20090116802 | Optical Control Device and Manufacturing Method Thereof - The purpose of present inventions is to provide an optical control device having a single-mode waveguide in the optical control device having the ridge waveguide, and to stably manufacture and provide the optical control device having the single-mode waveguide with high precision even when the substrate is a thin plate with the thickness of 10 μm or less. An optical control device having a substrate | 05-07-2009 |
20090153948 | THz Wave Generation Device - [Task] To provide the THz wave generator restricting increase in manufacturing cost or large size of the entirety of the apparatus and generating efficiently the several-W THz wave. | 06-18-2009 |
20090324156 | Light control device - To provide a light control device which is possible to realize a velocity matching between a microwave and an optical wave or an impedance matching of the microwaves even though a signal path having a high impedance of 70Ω or more, and is possible to reduce a driving voltage. | 12-31-2009 |
20100034496 | OPTICAL CONTROL DEVICE - A light control element is provided with a thin board having electro-optical effects; an optical waveguide formed on the thin board; and a control electrode for controlling light that passes through the optical waveguide. The light control element performs speed matching between a microwave signal applied to the control electrode and the light, impedance matching of the microwaves, reduction of a driving voltage and high speed operation. In the control electrode of the light control element, a signal electrode and a grounding electrode are arranged on an upper side of the thin board, and on a lower side of the thin board, a second electrode including the grounding electrode is arranged, through a low refractive index layer entirely formed in the length direction of the signal electrode, with a width wider than that of the signal electrode. | 02-11-2010 |
20100046880 | OPTICAL CONTROL DEVICE - In a light control element comprising a thin plate having a thickness of 10 [mu]m or less and exhibiting electro optic effect, an optical waveguide formed on the thin plate, and a control electrode for controlling light passing through the optical waveguide, the control electrode includes a first electrode and a second electrode so arranged as to sandwich the thin plate, and the first electrode has a coplanar electrode consisting of a first signal electrode and a ground electrode, while the second electrode has a second signal electrode. Modulation signals having mutually inverted amplitudes are inputted to the first signal electrode of the first electrode and the second signal electrode of the second electrode such that the modulation signals cooperate to apply an electric field to the optical waveguide. | 02-25-2010 |
20100046881 | OPTICAL CONTROL DEVICE - A light control element is provided with a thin board having electro-optical effects; an optical waveguide formed on the thin board; and a control electrode for controlling light that passes through the optical waveguide. The light control element performs speed matching between a microwave signal applied to the control electrode and the light, impedance matching of the microwaves, reduction of a driving voltage and high speed operation. In the control electrode of the light control element, a signal electrode and a grounding electrode are arranged on an upper side of the thin board, and on a lower side of the thin board, a second electrode including the grounding electrode is arranged. The second electrode is arranged not to exist below the signal electrode, especially for achieving impedance matching. | 02-25-2010 |
20100232736 | Optical Control Device - It is an object to provide an optical control device capable of realizing speed matching between a microwave and a light wave or impedance matching of microwaves and of reducing a driving voltage. An optical control device including a thin plate | 09-16-2010 |
20100247025 | OPTICAL ELEMENT - Disclosed is an optical element which includes a support substrate and a thin plate of single crystal stacked on the support substrate through a thermoplastic adhesive, having the advantages of easily regulating the phase of light waves and restoring the regulated state to the original state. The optical element includes a support substrate | 09-30-2010 |
20110164844 | OPTICAL MODULATOR - It's an object of the invention to provide an optical modulator with high performance. The optical modulator | 07-07-2011 |
20110197432 | Method for forming polarization reversal - A method for forming a ferroelectric spontaneous polarization reversal in a desired region of a ferroelectric substrate includes the steps of forming, for the desired region of the surface of the ferroelectric substrate, an electrode pattern or a mask pattern composed of aggregates of micropatterns, and then applying a given voltage into the desired region. The configuration of the micropatterns can be a stripe-shaped pattern, an ellipse-shaped pattern, a hexagon-shaped pattern, a network pattern, or a double cross shaped pattern. The method can further include the steps of generating many nucleuses by using the electrode pattern or the mask pattern composed of the aggregates of micropatterns, forming another electrode pattern or another mask pattern corresponding to the desired region, and then applying a given voltage into the desired region to generate a ferroelectric spontaneous polarization reversal around the nucleuses. | 08-18-2011 |
20110201133 | Method for forming polarization reversal - A method for forming a ferroelectric spontaneous polarization reversal, including the steps of forming a concave portion on a top face of a ferroelectric substrate or a bottom face of a ferroelectric substrate, and applying an electric field into the substrate, wherein a ferroelectric spontaneous polarization reversal is formed at least in one portion of a region of the substrate with the concave portion, and wherein the shape of the concave portion is configured such that the width of the concave portion gets narrower gradually toward the inside of the substrate. The method may further include the steps of, after the reversal, making into almost a flat-plane the top or bottom face having the concave portion, and then, forming a new concave portion in another region and applying an electric field to form another reversal in one portion of the region of the substrate having the new concave portion. | 08-18-2011 |
20110206860 | Method for forming polarization reversal - A method for forming a ferroelectric spontaneous polarization reversal includes the steps of forming a convexo-concave structure on a top face of a ferroelectric substrate firstly, and then forming a ferroelectric spontaneous polarization region on the substrate including one portion of a convex portion, with a concave portion being formed on the bottom face of the substrate within a region where a ferroelectric spontaneous polarization reversal is to be formed and the convex portion is formed, and then applying an electric field into the substrate. The depth of the concave portion on the bottom face of the substrate may be greater than the height of the convex portion on the top face of the substrate. The width of the concave portion on the bottom face of the substrate may be wider than width of said convex portion on the top face of the substrate. | 08-25-2011 |
20120162656 | METHOD FOR EVALUATING CHARACTERISTIC OF OPTICAL MODULATOR HAVING MACH-ZEHNDER INTERFEROMETER - A method for evaluating a characteristic of, especially, each of Mach-Zehnder interferometers (MZIs) of an optical modulator. The method includes a step of measuring the intensity of the output of the optical modulator containing MZIs and a step of evaluating a characteristic of each MZI by using the sideband. The output intensity measuring step is the one of measuring the intensity S | 06-28-2012 |
20140050440 | OPTICAL WAVEGUIDE DEVICE - Provided is an optical waveguide device capable of reducing stress that occurs inside an optical waveguide substrate due to a difference in a coefficient of thermal expansion. The optical waveguide device ( | 02-20-2014 |
20140086524 | OPTICAL MODULATOR - An optical modulator that includes a substrate | 03-27-2014 |