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Optical Waveguides > Temporal Optical Modulation Within An Optical Waveguide > Electro-optic Electro-opticElectro-optic 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.10/11/07 - 20070237443 - Method and apparatus for modulation using a conductive waveguide Method and apparatus for modulation of both the intensity and the polarization of radiation in silicon waveguides by applying a biasing voltage to the waveguide. ... 10/11/07 - 20070237442 - Transparent conducting components and related electro-optic modulator devices New electro-optic (EO) phase modulator devices and geometries, as can be constructed using a transparent conductive component. ... 09/13/07 - 20070211983 - Method and apparatus for transforming optical wave modes The present invention provides a method and apparatus for transforming optical wave modes. The apparatus includes a substrate and a first layer of waveguiding material above the substrate, the first layer having a first index of refraction, a first horizontal dimension, and a first vertical dimension. The apparatus also includes ... 06/28/07 - 20070147722 - Optical waveguide devices and travelling wave type optical modulators A device 4 has a substrate 5, an optical waveguide 2 and modulation electrodes 1A, 1B, 1C. The substrate 5 is made of an electro-optic material and has a thickness of ≦30 μm at least in a region where the modulation electrode applies an electric field. The device has a ... 05/31/07 - 20070122072 - Optical modulator An optical modulator is provided. The optical modulator includes a thin plate made of an electrooptic material and having a thickness of 20 μm or less, an optical waveguide formed on a top or bottom surface of the thin plate, and a modulation electrode formed on the top surface of ... 05/24/07 - 20070116398 - High speed and low loss gesi/si electro-absorption light modulator and method of fabrication using selective growth An optoelectronic device includes an input waveguide structure that receives an input optical signal. A GeSi/Si waveguide structure receives from the input waveguide the input optical signal and performs selective optoelectronic operations on the input optical signal. The GeSi/Si waveguide structure outputs an optical or electrical output signal associated with ... 04/12/07 - 20070081755 - Optical modulator An optical modulator using a thin plate including a portion having 20 μm or less thickness, capable of selecting a specific polarized wave from a light wave which propagates in an optical waveguide in the modulator without reduced productivity. The modulator includes an X-cut or Y-cut thin plate of a ... 03/08/07 - 20070053625 - Optical modulator An optical modulator using a thin plate capable of improving an S/N ratio of an output light is provided. The optical modulator including a thin plate 1 having an electrooptic effect and having a thickness of 20 μm or less, an optical waveguide 4 formed on a top or bottom ... 02/01/07 - 20070025656 - On-fiber microwave modulator and high speed switch for telecommunication applications Application of a communication signal, RF (radio frequency) or microwave signal to a modified optical fiber for modulating or switching-off the optical signal propagating within the optical fiber. The passive cladding material of an ordinary optical fiber is removed from a small region and replaced with active multilayer materials including ... 01/18/07 - 20070014503 - Linearized directional coupler optical modulator Invention discloses an apparatus that provides linear optical modulation of light carrier signals by an electrical modulation signal. Linearized modulation is achieved through the selection of a spacing profile between two optical transmission waveguides. The spacing profile relates to a transfer function, the parameters of which are chosen to yield ... 01/11/07 - 20070009195 - Optical modulator and a method for adapting an optical modulator The present invention relates to an optical modulator, divided into at least two active segments separated by at least one passive segment. The modulator comprises: an optical waveguide with an optical group index no having an optical signal propagating at an optical velocity vo, and a microwave transmission line with ... 01/04/07 - 20070003180 - Optical modulator An optical modulator of the invention includes a substrate having an optical waveguide and an electric waveguide formed therein, a driving circuit that generates a modulation electric signal, a relay circuit that gives the modulation electric signal to the electric waveguide via an electric filter circuit made of a capacitor ... 12/14/06 - 20060280395 - Control of te and tm modes in electrooptic waveguide devices An optical waveguide structure is provided wherein a controller is configured to provide a TE control voltage to a first set of control electrodes in a first electrooptic functional region and a TM control voltage to a second set of control electrodes in a second electrooptic functional region. The TE ... 11/30/06 - 20060269184 - Optical device The present invention provides a highly-integrated and compact optical element and further provides an optical element having various functions such as lower driving voltage, chirping suppression and polarization-independency. The optical element has a substrate 1 formed of a material having an electrooptic effect, a plurality of optical waveguides formed on ... 11/30/06 - 20060269183 - Semiconductor optical modulator having a quantum well structure for increasing effective photocurrent generating capability An optical modulator comprises a first waveguide layer and a barrier layer, and a quantum well layer sandwiched between the first waveguide layer and the barrier layer, where the quantum well layer has a graded composition that varies the bandgap energy of the quantum well layer between a minimum bandgap ... 10/12/06 - 20060228064 - Electronic and optical devices and methods of forming these devices Electronic and optical (or photonic) devices with variable or switchable properties and methods used to form these devices, are disclosed. More specifically, the present invention involves forming layers of conductive material and dielectric material or materials with varying conductivity and indexes of refraction to form various electronic and optical devices. ... 09/28/06 - 20060215949 - Electro-optic modulation A silicon electro-optic waveguide modulator is formed using a metal-oxide-semiconductor (MOS) configuration. Various embodiments are described using different modes of operation of the MOS diode and gate oxide thicknesses. In one example, a high-speed submicron waveguide active device is formed using silicon-on-insulator. A micro-ring resonator intensity-modulator exhibits switching times on ... 06/15/06 - 20060126987 - Electroabsorption modulator and method of manufacturing the same Provided is a double waveguide electroabsorption modulator, in which two spot size converters are integrated between first and second optical waveguides, thereby reducing an insertion loss between an optical fiber and an optical modulator while favorably operating even in high input optical power. Therefore, the electroabsorption modulator can stably operate ... 06/08/06 - 20060120654 - Optical modulators An optical modulator 1C has a substrate 2 of an electro-optic material and having first and second main faces, an optical waveguide formed on the substrate 2 and having first branched part 5 and a second branched part 3, and ground electrodes 4A, 4C and a signal electrode 4B provided ... 06/01/06 - 20060115197 - Optical module Provided is an optical module including a microstrip line, a traveling wave type optical device positioned in the end of the microstrip line, and at least one balanced open stub connected to the microstrip line for the impedance matching at a specific frequency such as 40 GHz and 60 GHz. ... 06/01/06 - 20060115196 - Controllable electro-optic device having substrate trenches between electrodes An optical modulator which has substantially low loss and has an improvement in voltage reduction is disclosed having an electro-optic lithium niobate substrate. The substrate has first, second and third ridges extending along its surface. Extending along the first and second ridges are first and second waveguides. A first RF ... 05/11/06 - 20060098910 - Linear optical modulators and method of linear optical modulation A device that comprises: a) a first optical waveguide; b) a second optical waveguide; c) an optical coupling region including the first and second optical waveguides, the optical coupling region characterized as having at least one coupling length and comprising a first bias section, a modulation section, and a second ... 04/20/06 - 20060083456 - High gain resonant modulator system and method An optical resonant modulator includes an optical ring resonator and an optical loop that is coupled to the optical ring resonator by two couplers. The optical ring resonator can have a hybrid design in which the ring resonator is formed on an electro-optically passive material and the optical loop is ... 03/30/06 - 20060067599 - Method and apparatus for improving frequency response in mode converters A semiconductor based electro-optic modulator comprising a capacitively coupled ground allowing for DC biasing of the modulator and a pre-distortion circuit for alleviating RF skin effect and for increasing bandwidth of modulator. Electrical components and functions of modulator partly located on an alumina pane. Reduction of thermally-induced stresses by connecting ... 10/13/05 - 20050226547 - Electrooptic modulator employing dc coupled electrodes Optical devices are provided for optical signal modulation under the control of an electrical signal propagating along a traveling wave electrode structure. The electrode structure comprises a coplanar stripline including a control signal electrode interposed between a pair of ground plane electrodes. Each of the ground plane electrodes defines a ... 09/29/05 - 20050213863 - Optical modulator In relation to an optical modulator (e.g., an RZ optical modulator) formed from a plurality of Mach-Zehnder optical modulators, in an attempt to make the optical modulator compact and realize a low drive voltage, the optical modulator is formed by comprising a plurality of Mach-Zehnder optical modulators, each including a ... 09/15/05 - 20050201653 - System for reducing the electrical return loss of a lithium niobate traveling wave optical modulator with low characteristic impedance An electro-optical modulator is disclosed that has a microwave input, chip with a thin film resistor or a lumped resistor located between an input RF connector and an RF electrode on a Lithium Niobate chip. The accessory connection chip has a broadband attenuator like a thin film resistor which is ... 09/08/05 - 20050196092 - Optical modulator and communications system An optical modulator according to the present invention includes an optical waveguide 2a to 2d made of a material with an electro-optic effect and a modulating electrode 3 for applying a modulating electric signal to light propagating through the optical waveguide 2a to 2d. The modulator further includes a periodic ... 08/11/05 - 20050175270 - Electronically biased strip loaded waveguide A strip loaded waveguide comprises a slab and a strip, wherein the strip is separated from the slab. Nevertheless, a guiding region is provided for propagating an optical mode and this guiding region extends both within the strip and the slab. A layer of material having an index of refraction ... 07/21/05 - 20050157970 - Optical waveguide element A first branched optical waveguide and a second branched optical waveguide, to constitute a Mach-Zehnder type optical waveguide, are formed at the surface of a substrate. A first ground electrode, a signal electrode and a second ground electrode are provided on a buffer layer formed on the substrate. The second ... 06/30/05 - 20050141801 - System and method for an optical modulator having a quantum well The optical modulator may include a strained layer of SiGe to confine carriers in a quantum well. The strained layer of SiGe may be doped with arsenic to provide electrons. The optical modulator may receive an optical signal and modulate the received signal by altering the absorption coefficient of the ... 06/09/05 - 20050123227 - Electro-optic modulator An electro-optic device includes a semiconducting layer in which is formed a waveguide, a modulator formed across the waveguide comprising a p-doped region to one side and an n-doped region to the other side of the waveguide, wherein at least one of the doped regions extends from the base of ... ### FreshPatents.com Support |