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| Number | Title | Issue Date |
| 8155484 | All-optical devices and methods for data processing An all-optical device for data processing is presented. The device comprises at least one optical waveguide unit (10) made of linear media and configured to provide multiple total internal reflections of light passing therethrough, the waveguide unit (10 | 04/10/2012 |
| 8116600 | Optical phase modulation element and optical modulator using the same Provided is a small-size optical phase modulation element and an optical modulator using it. The optical phase modulation element includes a Plasmon waveguide having a clad made of a metal material having a complex dielectric constant having a negative real part in ... | 02/14/2012 |
| 8078015 | Optical modulator In an optical modulator, lights that have been branched by an input optical branching section are input via curved waveguides to a plurality of optical modulation sections arranged in parallel on the same substrate. In the optical modulation sections, optical branch... | 12/13/2011 |
| 8023775 | Super flat optical frequency comb signal generator An optical frequency COM generator generating an optical frequency COM having flat spectrum characteristics using a single modulator. The optical frequency COM generator has a drive signal system (11) and a bias signal system (14) which drive a first d... | 09/20/2011 |
| 8023776 | Mach-Zehnder type optical modulator A Mach-Zehnder type optical modulator includes an optical waveguide formed in an electro-optical substrate, an input section that inputs light to the optical waveguide, a plurality of branch modulation sections that generate branched input light, extend from the inp... | 09/20/2011 |
| 8019185 | Unit-cell array optical signal processor This invention provides a versatile unit cell as well as programmable and reconfigurable optical signal processors (such as optical-domain RF filters) that are constructed from arrays of those unit cells interconnected by optical waveguides. Each unit cell comprises... | 09/13/2011 |
| 8014636 | Electrical contacts on top of waveguide structures for efficient optical modulation in silicon photonic devices A phase modulation waveguide structure includes one of a semiconductor and a semiconductor-on-insulator substrate, a doped semiconductor layer formed over the one of a semiconductor and a semiconductor-on-insulator substrate, the doped semiconductor portion includin... | 09/06/2011 |
| 7953303 | Method and system for generating flat or arbitrary shaped optical frequency combs A method and system for generating an optical frequency comb that employs a dual parallel modulator that inputs an optical signal at a center frequency of a desired optical frequency comb and an RF signal at a frequency corresponding to a desired spacing of the teet... | 05/31/2011 |
| 7941011 | Multilevel light intensity modulator In a multilevel light intensity modulator of the invention, input light is branched into n (n is an integer of 2 or more), and respectively sent to n branching waveguides. On the branching waveguides are respectively provided MZI light modulating sections. The MZI l... | 05/10/2011 |
| 7929813 | QAM optical modulators An exemplary optical modulator includes an interferometer. The interferometer includes an input optical coupler, an output optical coupler, and two or more controllable optical waveguides. Each controllable optical waveguide connects the input optical coupler to the... | 04/19/2011 |
| 7869669 | Optical phase modulator The invention provides an optical phase modulator having a substrate made of an electro-optical material, a signal electrode provided on the substrate and first and second ground electrodes provided on both sides of the signal electrode. The electrodes are provided ... | 01/11/2011 |
| 7809218 | Optical modulators An object of the present invention is, in an optical modulator, to increase the production yield by enhancing the patterning accuracy of the electrodes, as well as to reduce the electrode loss by increasing the thickness of the electrodes. An optical modulator has a... | 10/05/2010 |
| 7783138 | Free-space integrated photodetector with reduced phase tracking error A Mach-Zehnder (MZ) interferometer modulator structure for fiberoptic telecommunications is disclosed in which drift of the operating point can be monitored with a reduced phase tracking error. One or more components of free-space light radiated into the substrate o... | 08/24/2010 |
| 7773833 | Optical modulation device Light having components of frequencies f0, f+1 and f−1 outputted from an optical modulator (10) is monitored, a second light detection means (14b) measures the power P2 of all the components, and a first... | 08/10/2010 |
| 7715663 | Integrated optical latch Techniques are disclosed for optical switching and data control, without the interaction of electronic switching speeds. In one example embodiment, a common cavity optical latch is provided that that can hold an optical state for an extended period of time, and the ... | 05/11/2010 |
| 7711215 | Optical amplitude modulation system capable of cancelling high order component It is an object of the present invention to provide a DSB-SC system capable of suppressing a third order component. The DSB-SC modulation having high extinction ratio can be realized by adjusting the first order component, which is generated by applying a modulation... | 05/04/2010 |
| 7689067 | Nested modulator A nested modulator is provided where the circuit arrangement of modifying electrodes including signal electrodes is simplified, and at the same time, the drive voltage can be lowered. A nested modulator, including: a substrate 20 made of a material hav... | 03/30/2010 |
| 7689066 | Optical Modulator An optical modulator is provided for modulating light propagating in a three-dimensional optical waveguide 5 by applying a voltage thereto. The optical modulator has the three-dimensional optical waveguide 5 including at least one pair of branch optica... | 03/30/2010 |
| 7676120 | Optical phase shift device and antenna system utilizing same A phase shift device of an optical fiber signal includes an actuator for changing the signal phase in at least one fiber portion by inducing the phase change by thermo-optical effect. An antenna system incorporating phase shift devices using the thermo-optical effec... | 03/09/2010 |
| 7668409 | 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 co... | 02/23/2010 |
| 7660491 | High-dynamic-range analog fiber-optic link using phase modulation and tunable optical filter A cw-laser source transmits low-noise, narrow-linewidth optical power via an optical fiber to a bias-free electro-optic phase modulator at a remote site, where an antenna or an RF sensor is located. The RF electrical signal modulates the phase modulator at the remot... | 02/09/2010 |
| 7643708 | Optical modulator Herein disclosed is an optical modulator, comprising: a substrate (1) having an electro-optic effect; an optical waveguide (3) formed in the substrate; a traveling wave electrode (4) including a center electrode (4a) and ground ele... | 01/05/2010 |
| 7636501 | QAM optical modulators An exemplary optical modulator includes an interferometer. The interferometer includes an input optical coupler, an output optical coupler, and two or more controllable optical waveguides. Each controllable optical waveguide connects the input optical coupler to the... | 12/22/2009 |
| 7630587 | Optical waveguide device An optical waveguide device is disclosed wherein the modulation efficiency for a driving voltage is improved. The optical waveguide device includes a substrate having an electro-optic effect, an optical waveguide formed on the substrate, an electrode section adapted... | 12/08/2009 |
| 7606447 | Mach-Zehnder type semiconductor device and method of controlling the same A Mach-Zehnder type semiconductor device includes electrodes for injecting carriers into first and second branch waveguides so as to change reflection indexes of the first and second branch waveguides. The device further includes electrodes which are placed above ei... | 10/20/2009 |
| 7603002 | 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 emis... | 10/13/2009 |
| 7580594 | Optical modulation element and optical modulation device having the same An optical modulation element includes a waveguide defined based on a defect in a photonic crystal, a carrier conducting region for conducting a carrier to the waveguide, an electrode for injecting a carrier into the carrier conducting region, and a current control ... | 08/25/2009 |
| 7570843 | Optical modulation element module The present invention provides an optical modulation element module which is capable of the optical modulation for analog transmission with a low driving voltage and low chirp. An optical modulation element module, in which Mach-Zehnder type optical modulatio... | 08/04/2009 |
| 7542630 | High speed optical phase modulator An optical device includes a phase modulator having a waveguide on a substrate. The phase modulator also includes an n-type region having a proximity to a p-type region that causes formation of a depletion region when a bias is not applied to the modulator. The depl... | 06/02/2009 |
| 7539359 | Systems and methods for chirp control of a dual arm Z-modulator to minimize dispersion effect of fiber plant The present invention provides systems and methods for chirp control of a dual arm Z-modulator to minimize dispersion in the fiber plant. The chirp control is based upon a real-time control loop based upon performance monitoring data between a transmitter and a rece... | 05/26/2009 |
| 7536065 | Electro-optic gap-cell for waveguide deployment The present invention provides an electro-optic gap-cell for waveguide deployment, including a first optical transmission medium formed in at least a portion of a device layer, a second optical transmission medium formed in at least a portion of the device layer, an... | 05/19/2009 |
| 7532778 | Optical waveguide modulator equipped with an output light monitor An optical waveguide element having a plurality of surface waveguide portions. A connecting portion for connecting the surface waveguide portions. An output light-outputting waveguide portion connected to the connecting portion each on a dielectric substrate. An out... | 05/12/2009 |
| 7519241 | Optical device The present invention relates to an optical device including a branching unit for making branches of incident light in a first branch ratio, a phase adjusting unit for adjusting the relationship in phase among branched lights obtained by the branching unit and a com... | 04/14/2009 |
| 7515778 | Segmented optical modulator An optical modulator is formed to include an adjustable drive arrangement for dynamically adjusting the effective length of the optical signals path(s) within the modulator. Each modulator arm is partitioned into a plurality of segments, with each segment coupled to... | 04/07/2009 |
| 7492975 | Optical switch, optical modulator and wavelength variable 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. A... | 02/17/2009 |
| 7483597 | Optical modulator utilizing multi-level signaling An optical modulator is formed to include a plurality of separate electrodes disposed along one arm, the electrodes having different lengths and driven with different signals to provide for multi-level signaling (e.g., PAM-4 signaling). By using separate drivers to ... | 01/27/2009 |
| 7474812 | Monitor photodetector equipped optical modulator An optical modulator has, on a substrate having electro-optic effect, an optical waveguide including an input optical waveguide, two branching optical waveguides which branch a light beam incident to the input optical waveguide into two beams, two interaction optica... | 01/06/2009 |
| 7471853 | Optical modulator In an optical modulator according to the invention, with respect to two MZ type optical modulators connected to each other in tandem by a curved folded waveguide on an identical substrate, a longitudinal direction of an MZ type optical waveguide unit on an optical i... | 12/30/2008 |
| 7469075 | 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 wit... | 12/23/2008 |
| 7440643 | Variable light controlling device and variable light controlling method A variable light controlling device comprising a substrate, an optical waveguide disposed on the substrate, a first heater and a second heater to change the optical waveguide's temperature is fabricated. And a total amount of the power supplied to the first and the ... | 10/21/2008 |
