REGISTER now for FREE 
|
FREE patent keyword monitoring and additional FREE benefits. REGISTER now for FREE
|
|
|
Optical Waveguides > Temporal Optical Modulation Within An Optical Waveguide > Electro-optic > Phase Modulation Type Phase Modulation TypePhase Modulation Type patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.11/01/07 - 20070253659 - Optical switch, optical modulator and wavelength variable filter An optical switch, an optical modulator, and a wavelength variable filter each have a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch includes a 3-dB coupler placed on an output, a 3-dB coupler placed ... 10/18/07 - 20070242915 - Coplanar waveguide line the substrate comprising an n+ electrically conducting layer extending between the optical waveguides; wherein the coplanar waveguide line further comprises an electrical connection between first and second electrode strips. ... 10/11/07 - 20070237444 - Propagation delay variation for a distributed optical modulator driver Propagation delay variations for a distributed optical modulator driver are described. In one example, a system includes a signal distribution network, a plurality of output driver stages coupled to the signal distribution network, a waveguide coupled to the outputs of the output drive stages to receive a voltage across the ... 09/20/07 - 20070217729 - Optical modulator In an optical modulator according to the present invention, a Mach-Zehnder optical waveguide is formed on a substrate having an electro-optic effect, a signal electrode and an earth electrode are disposed along a pair of branching waveguides of the optical waveguide, and an electric signal is applied on the signal ... 09/13/07 - 20070211984 - Optical coupler A optical coupler is formed on a substrate and includes a first and elongate optical waveguides. Variable coupling is provided between the first and second elongate optical waveguides. In an optical modulator, a plurality of phase shifts are provided along the waveguides to increase linearity of a response of the ... 04/12/07 - 20070081756 - Optical modulator and control method therefor In order to provide a Mach-Zehnder optical modulator capable of feed-back compensating a change due to an optical coupling loss, and the characteristic change peculiar to functional devices, and a control method therefor, a control method for a semiconductor Mach-Zehnder optical modulator using a laser device as a light source ... 03/15/07 - 20070058896 - Optical switch, optical modulator and variable wavelength filter The present invention provides an optical switch, an optical modulator, and a wavelength variable filter each of which has a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch according to the present invention includes ... 02/08/07 - 20070031080 - Method and apparatus for phase shifting an optical beam in an optical device An apparatus and method for high speed phase modulation of optical beam. For one embodiment, an apparatus includes an optical waveguide having adjoining first and second regions disposed in semiconductor material. The first and second regions have opposite doping types. A first buffer is disposed along the optical waveguide. A ... 12/21/06 - 20060285787 - Optical modulator An optical modulator which magnifies a modulation index and reduces affection of SBS by suppressing a light source carrier component in an equivalent light source spectral width and performs more long-distance transmission by suppressing one of sideband spectrums generated by a modulation signal to reduce affection of fiber dispersion, having ... 10/12/06 - 20060228065 - Optical modulator with coupled coplanar strip electrode and domain inversion A modulator includes an interferometer waveguide structure formed on an electro-optical substrate, preferably a Z-cut lithium niobate or a Z-cut lithium tantalate. The substrate includes a domain inversion between a region near the first arm and a region near the second arm of the interferometer waveguide structure. In one example, ... 09/21/06 - 20060210212 - Optical device An optical device having a substrate having an electro-optical effect, an optical waveguide formed in the substrate, and an electric field emission electrode, and an electric field convergence electrode to which an electric field emitted from the electric field emission electrode converges. The optical waveguide is formed such that light ... 09/14/06 - 20060204162 - Device for mach-zehnder modulator bias control for duobinary optical transmission and associated system and method An electro-optical device includes an amplifier having an input receiving a data signal, a crossing adjustment input, and an output. The device includes a light source and a Mach-Zehnder modulator having a first input coupled to the output of the amplifier, an optical input coupled to the laser, a bias ... 07/27/06 - 20060165337 - Optical modulator An optical modulator 20 including a substrate with an electro-optic effect, a plurality of optical waveguide sections 10 formed on the substrate, and a plurality of modulation electrodes 21 and 22 for modulating lights passing through the optical waveguide sections, and into which identical modulation signals having a predetermined phase ... 07/20/06 - 20060159384 - Optical communication device and optical device An optical communication device includes a substrate which has electro-optical effect; a first optical modulator which has a pair of waveguides formed in the substrate; a second optical modulator which has a pair of waveguides formed in the substrate; a waveguide coupler which is provided in an out put of ... 07/06/06 - 20060147146 - Digital phase modulator for a fiber-optic device A method and arrangement of electrodes for increasing the resolution of a digital phase modulator for a fiber-optic signal transmission or measuring device. A predetermined total number m of electrodes of different lengths are arranged parallel and on both sides with respect to a light guiding path in or on ... 07/06/06 - 20060147145 - Optical modulator An optical modulator in which stabilized driving is realized over a long time by relaxing stress generated in a recess formed in the surface of a substrate in the optical modulator and controlling deterioration of optical modulation control caused by stress-strain in the substrate including an optical waveguide. The optical ... 06/29/06 - 20060140528 - Traveling-wave optoelectronic wavelength converter Traveling-wave optoelectronic wavelength conversion is provided by a monolithic optoelectronic integrated circuit that includes an interconnected traveling-wave photodetector and traveling-wave optical modulator with a widely tunable laser source. Either parallel and series connections between the photodetector and modulator may be used. An input signal modulated onto a first optical wavelength ... 06/15/06 - 20060126988 - Optical device and drive voltage supply device The present invention is directed toward an optical device and a drive voltage supply device, which prevent occurrence of a d.c. drift and enable stable selection of light of desired wavelength without deteriorating a filtering characteristic. The optical device comprises a substrate having an electrooptical effect; an optical waveguide formed ... 05/25/06 - 20060110089 - Optical modulator An optical modulator restricted in a photorefractive phenomenon caused by a stray light in an optical modulator, and improved in the quenching ratio characteristics of a signal light. The optical modulator comprises a substrate consisting of a material having an electro-optic effect, an optical waveguide formed on the substrate, and ... 03/30/06 - 20060067601 - Method of driving mach-zehnder light modulator and light modulating device A method of driving a mach-zehnder light modulator includes alternately applying modulation signal voltages having equal positive and negative effective values as modulation signal voltages to a modulation electrode of the mach-zehnder light modulator. The mach-zehnder light modulator includes a mach-zehnder optical waveguide disposed on a base exhibiting an electro-optical ... 03/30/06 - 20060067600 - Display element having filter material diffused in a substrate of the display element Optical filter functionality is incorporated into a substrate of a display element thereby decreasing the need for a separate thin film filter and, accordingly, reducing a total thickness of a filtered display element. Filter functionality may be provided by any filter material, such as pigment materials, photoluminescent materials, and opaque ... 12/29/05 - 20050286825 - Optical modulator having reduced bandwidth requirements and method of operation thereof An optical modulator is overdriven to increase its nonlinearity and therefore improve its response as it pertains to differential phase shift keyed (DPSK) transmission and a method of operating the same. In one embodiment, the MZM includes an MZM drive circuit coupled to the electrodes and configured to deliver to ... 12/08/05 - 20050271313 - Optical device The optical element comprising a substrate 1 consisting of a material having an electrooptic effect, top optical waveguides 2-1 an 2-2 formed on the top face of said substrate, bottom optical waveguides formed on the bottom face of said substrate, a top modulating electrode for controlling the phase of a ... 11/17/05 - 20050254743 - Optical modulator, optical transmitter, optical modulating method and manufacturing method of the optical modulator An optical interference unit branching inputted input light into two optical waveguides, combining the respective branched lights propagating through the respective optical waveguides and outputting modulated light is included, and bias voltage supplied to at least one optical waveguide out of the two optical waveguides is controlled in accordance with ... 11/10/05 - 20050249445 - Low-voltage flexible optic polymer modulators An electro-optic modulator is formed from all flexible materials, to form a flexible electro-optic modulator. The formation process uses a photoresist which selectively adheres to one material more than it adheres to another material. This allows selective liftoff, where only parts of the substrate are lifted off. For example, this ... 08/11/05 - 20050175271 - Optical modulator An object of the invention is to provide a Mach-Zehnder type optical modulator that can reduce wavelength chirp occurring in a modulated light, and also can reduce an optical loss with a small sized configuration. To this end, according to the present Mach-Zehnder type optical modulator, in a configuration where ... ### FreshPatents.com Support |