Patent application number | Description | Published |
20090252500 | Optical Modulator - It is an object of the invention to provide an optical modulator in which a connection substrate or a terminal substrate is disposed outside an optical modulation element and which can maintain at a proper voltage amplitude value a modulation signal applied to an optical modulation element. An optical modulator includes: a substrate having electro-optic effect; an optical waveguide formed on the substrate; an optical modulation element | 10-08-2009 |
20090290828 | Optical Modulator - An optical modulator is provided which suppresses a radiation mode of a microwave generated in a connection substrate or a termination substrate from entering a signal electrode of the optical modulator and suppresses modulation properties from being degraded. | 11-26-2009 |
20090297086 | Light Modulation Device - The present invention is directed to provide a light modulation device capable of not only restricting the faint light propagating in the adhesive layer from being re-incident on the thin substrate but also increasing an adhesive strength of the thin substrate and the supplementing plate. The invention is characterized in a light modulation device having a thin substrate | 12-03-2009 |
20100027934 | Traveling wave optical modulator - An object of the invention is to provide a traveling-wave-type optical modulator capable of adjusting the frequency characteristics of an electric/optical conversion response over a wide frequency band, preventing the occurrence of jitter, and improving optical transmission characteristics. | 02-04-2010 |
20100104241 | METHOD OF ADJUSTING OPTICAL AXIS OF OPTICAL WAVEGUIDE ELEMENT, AND OPTICAL WAVEGUIDE ELEMENT - A method of adjusting the optical axis of an optical waveguide element which can improve a manufacturing yield of the optical waveguide element, an alignment yield between the optical waveguide element and an input waveguide means, etc. and can equalize the branch ratio in a Y-branch waveguide; and an optical waveguide element which can be made compact and also M inhibited from complication in structure by using this method. The optical waveguide element ( | 04-29-2010 |
20100111463 | OPTICAL WAVEGUIDE DEVICE AND METHOD FOR SUPPRESSING TEMPERATURE CROSSTALK OF OPTICAL WAVEGUIDE DEVICE - An optical waveguide device includes: a substrate having an electro-optical effect; an optical waveguide section formed on the substrate; and a plurality of modulating electrodes for modulating optical waves propagating in the optical waveguide section. The optical waveguide section branches into two parts in the propagating direction of the optical waves, thus forming the two main optical waveguides, and each of the main optical waveguides branches into two parts in the propagating direction of the optical waves, thus forming the two sub optical waveguides. The two main optical waveguides constitute a main Mach-Zehnder type optical waveguide, and the two sub optical waveguides are incorporated into the main Mach-Zehnder type optical waveguide to constitute a sub Mach-Zehnder type optical waveguide. A heat conduction suppressing zone is defined on a portion of the substrate disposed between two opposite sub Mach-Zehnder type optical waveguides. | 05-06-2010 |
20100247023 | OPTICAL WAVEGUIDE TYPE MODULATOR - An optical waveguide type modulator with a decreased driving voltage and an improved return loss of a driving signal is provided which includes an optical waveguide having a Mach-Zehnder type optical waveguide portion and a signal electrode and a ground electrode modulating an optical wave guided in the optical waveguide. The signal electrode is arranged along at least one of two branched waveguides and Y-branched portions of the Mach-Zehnder type optical waveguide portion and along a part of one Y-branched portion connected to the one branched waveguide. Outside the part of one Y-branched portion, the signal electrode is drawn across a symmetric axis of the Mach-Zehnder type optical waveguide portion with a gap from the one Y-branched portion, and is drawn so as not to extend along the other Y-branched portion connected to the one branched waveguide and so as not to extend across the symmetric axis with a gap from the one branched waveguide. | 09-30-2010 |
20100247024 | OPTICAL WAVEGUIDE TYPE DEVICE - An optical waveguide type device employing an X-cut substrate having an electro-optical effect is provided in which the modulation efficiency due to an electric field formed by control electrodes is improved. The optical waveguide type device includes: an X-cut substrate having an electro-optical effect; an optical waveguide formed on the substrate; and a control electrode controlling an optical wave propagating in the optical waveguide and including a signal electrode and a ground electrode. Here, the bottom surface of at least one of the signal electrode and the ground electrode disposed to interpose the optical waveguide therebetween is lower (by a height difference d) than the top surface on which the optical waveguide is formed. | 09-30-2010 |
20100284644 | OPTICAL MODULATOR - An optical modulator includes a substrate that is formed of a material having an electro-optic effect, an optical waveguide | 11-11-2010 |
20100296767 | OPTICAL MODULATOR - Provided is an optical modulator wherein frequency characteristics in a high frequency band are further improved and temperature drift phenomenon is more suppressed. The optical modulator is provided with a substrate ( | 11-25-2010 |
20110013863 | OPTICAL WAVEGUIDE ELEMENT MODULE - Disclosed is an optical waveguide element module in which a filter circuit including a capacitor is provided on a line through which a modulation signal is input to a modulating electrode of an optical waveguide element and which is capable of preventing the deterioration of an electric signal in the filter circuit or the occurrence of a resonance phenomenon within the frequency range used and obtaining flat electrical/optical response frequency characteristics in a wide band of more than several tens of gigahertz, even though a single-layer capacitor is used as the capacitor. | 01-20-2011 |
20110135241 | OPTICAL WAVEGUIDE ELEMENT MODULE - Provided is an optical waveguide element module which suppresses reflection of a modulation signal and attenuation of a modulation signal, even when an impedance of a modulation electrode of an optical waveguide element and an impedance of a transmission line for inputting the modulation signal from the external of the optical waveguide element are different from each other. The optical waveguide clement module is provided with an optical waveguide element, which has a substrate ( | 06-09-2011 |
20120027337 | OPTICAL MODULATOR - In order to provide an optical modulator capable of suppressing generation of mode mismatching light in the Y-multiplexer in the MZ-type waveguide or mixing of the mode mismatching light with the radiation-mode light or the output light, and separately extracting output light and radiation-mode light, there is provided an optical modulator having a Mach-Zehnder type waveguide on a surface of a dielectric substrate, wherein a waveguide after multiplexing in a Y-multiplexer in an output side of the Mach-Zehnder type waveguide is a multiple mode waveguide | 02-02-2012 |