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| Number | Title | Issue Date |
| 6844954 | Method of stabilizing electro-absorption modulators (EAM's) performance by maintaining constant absorption with the use of intergrated tap couplers and method of manufacture An exemplary monolithic stabilized monolithic transmissive active optical device, such as an electroabsorption modulator (EAM), a variable optical attenuator (VOA), or a semiconductor optical amplifier (SOA), with an output optical tap, is formed from: a substrate; ... | 01/18/2005 |
| 6836351 | Quantum-confined stark effect quantum-dot optical modulator A quantum-confined Stark effect quantum-dot optical modulator includes an interferometer having a beam splitter, first and second parallel optical branches fed by the beam splitter and a beam combiner fed by the first and second parallel optical branches and a laser... | 12/28/2004 |
| 6836350 | Device for coupling drive circuitry to electroabsorption modulator Drive circuitry to provide a DC bias voltage and a high frequency modulation current to an electroabsorption modulator (EAM), including a high frequency modulation current source, a coupling capacitor, and a first DC lead. The drive circuitry may include termination... | 12/28/2004 |
| 6831767 | Traveling wave optical modular An optical modulator having a good reflection characteristic over a broad band is provided, with a small semiconductor chip area, by use of a semiconductor chip on which a semiconductor optical modulator is mounted. A typical example of the optical modulator has a s... | 12/14/2004 |
| 6829072 | High speed active optical system for phase-shifting portions of an incoming optical wavefront The present application is directed to high speed optical system. In one embodiment, the optical system includes a photodiode which is sensitive to a wavelength of light, an image source irradiating a wavefront of a first wavelength on the photodiode to which the ph... | 12/07/2004 |
| 6825964 | Device for coupling drive circuitry to electroabsorption modulator Drive circuitry to provide a DC bias voltage and a high frequency modulation current to an electroabsorption modulator (EAM), including a high frequency modulation current source, a coupling capacitor, and a first DC lead. The drive circuitry may include termination... | 11/30/2004 |
| 6823145 | Optical transmitter module In order to obtain an optical transmitter module for converting an input electric signal to a light signal with fidelity and outputting it therefrom, a terminal resistor Rt and an optical modulator MD are connected in parallel within a package including a laser diod... | 11/23/2004 |
| 6823095 | Optoelectronic device An optoelectronic component has at least one monolithically integrated laser diode and at least one monolithically integrated optical waveguide. At least one of the optical waveguides is functionally coupled to at least two electro-absorption modulators, and at leas... | 11/23/2004 |
| 6819463 | Electro-optic phase-only spatial light modulator A spatial light modulator is disclosed which includes an electro-optic wafer, such as lithium niobate (LiNbO3) or PLZT, formed as an asymmetric Fabry-Perot cavity with a totally reflecting dielectric mirror on its bottom face and a partially reflecting di... | 11/16/2004 |
| 6813059 | Reduced formation of asperities in contact micro-structures A device comprising movable micro-structures configured to contact a substrate is disclosed. The substrate has a metal-insulator-metal construction with an upper metal layer and an insulator being patterned to provide substrate contact regions to a lower metal layer... | 11/02/2004 |
| 6813063 | Exciton polariton optical switch A waveguide having a periodic structure and the excitation of exciton polariton as one form of interactions between radiation fields and matter systems are applied to light switching to provide an optical switch that is excellent in light intensity extinction ratio ... | 11/02/2004 |
| 6801676 | Method and apparatus for phase shifting an optical beam in an optical device with a buffer plug An apparatus and method for modulating a phase of optical beam with reduced contact loss. In one embodiment, an apparatus according to embodiments of the present invention includes a first region of an optical waveguide disposed in semiconductor material. The first ... | 10/05/2004 |
| 6798550 | Spatial light modulator A modulator formed with a solid state electro-optic material having a pixellated structure interconnected to a circuit on a semiconductor substrate. Silicon CMOS integrated circuit that can include random access memories (RAMs) are used as a substrate and int... | 09/28/2004 |
| 6798552 | Semiconductor light modulator A band discontinuity reduction layer having a band gap energy larger than that of that of an MQW (multiple quantum well) absorption layer and smaller than that of a p-InP clad layer is provided between the MQW absorption layer and the p-InP clad layer. In addition, ... | 09/28/2004 |
| 6791733 | Resonance type optical modulator using symmetric or asymmetric electrode A resonance type optical modulator includes an optical path having electro-optical effect characteristics, a modulation electrode formed along the optical path for applying an electric field to the optical path, a common electrode formed in opposition to the modulat... | 09/14/2004 |
| 6777718 | Semiconductor optical device A semiconductor optical device includes a substrate, an optical waveguide layer on the substrate and having well and barrier layers. The semiconductor optical device also includes an optical absorbing layer on the substrate and adjacent to the optical waveguide laye... | 08/17/2004 |
| 6775045 | Optoelectronic module An optoelectronic module has a laser diode configured on a substrate. The laser diode is drivable using an electronic drive device. At least one electrode of the laser diode is connected or coupled to the substrate. In order to match the impedance of the laser diode... | 08/10/2004 |
| 6771410 | Nanocrystal based high-speed electro-optic modulator A method and apparatus for modulating light with an array of nanocrystals. First photons are directed onto an array of nanocrystals and at least a portion of the first photons ate directed by the array of nanocrystals. In one embodiment, the array of nanocrystals em... | 08/03/2004 |
| 6760141 | Semiconductor optical modulator and semiconductor optical device An electroabsorption semiconductor optical modulator includes a light absorption layer for generating a modulated light beam by absorbing an incident light beam. A well layer in the light absorption layer, accumulates charge carriers generated by the light absorptio... | 07/06/2004 |
| 6757091 | Method and apparatus for phase shifting an optical beam in an optical device An apparatus and method for modulating a phase of optical beam. In one embodiment, an apparatus according to embodiments of the present invention includes a first region of semiconductor material disposed in a second region of semiconductor material. An insulating r... | 06/29/2004 |
| 6738174 | Dual-electrode traveling wave optical modulators and methods The invention discloses phase-shifters, modulators, and method that produces a smaller π by means of a field excitation using multiple electrodes. A negative signal is introduced that travels with the positive signal, which enhances the electric field significantly... | 05/18/2004 |
| 6738397 | Solid-state light source apparatus A solid-state light source apparatus includes a first excitation laser light source for outputting a laser beam of a first wavelength, a second excitation laser light source for outputting a laser beam of a second wavelength, a difference frequency between the laser... | 05/18/2004 |
| 6738175 | Light emitting device To enhance the emission output of the light emitting device including an active layer made of nitride semiconductor containing In, the light emitting device having an active layer between the n-type semiconductor layer and the p-type semiconductor layer, characteriz... | 05/18/2004 |
| 6735008 | MEMS mirror and method of fabrication A moveable micromirror includes a supporting structure, a flexible post extending from the supporting structure, and a table extending radially from the end of the post along a plane generally perpendicular to the post, the table having a reflective surface facing a... | 05/11/2004 |
| 6728019 | Optical gate and optical phase modulator An optical gate according to the invention comprises a polarization divider to divide an optical signal into two orthogonal polarization components and to output them as a first polarization component which precedes in the time base and a second polarization compone... | 04/27/2004 |
| 6717709 | Semiconductor optical modulator An electro absorption modulator in which the photocurrent generated by the absorption of light is monitored and the bias voltage applied to the electro absorption modulator is varied in order to vary the photocurrent and thence the extinction ratio of the electro ab... | 04/06/2004 |
| 6717710 | Electro-modulating device An electro-modulating device for modulating light from a light source, as part of an opto-electronic communication network has a modulating medium for modulating light passing therethrough by varying an electric field applied across the modulating medium, an optical... | 04/06/2004 |
| 6717711 | Structure and method for forming a high efficiency electro-optics device A forming method and a structure of a high efficiency electro-optics device are disclosed. In the present invention, the cell-fixing surface between the die carrier and the electro-optics cell is decreased to increase the light emitting and absorbing regions of the ... | 04/06/2004 |
| 6712999 | Electrochromic element The present invention relates to an electrochronic element including the following elements: an electrode (E1), an electrochromic functional layer (FS), an ion-conducting electrolyte (EY) a layer with high electrical charge capacit... | 03/30/2004 |
| 6707589 | Optical modulator driver circuit with low power dissipation An optical modulator drive circuit provides a different approach to driving an optical modulator than presently employed, resulting in a reduction in power dissipation of the drive circuit by as much as 80%. Therefore, this invention dissipates as little as 20% of p... | 03/16/2004 |
| 6680791 | Semiconductor device for rapid optical switch by modulated absorption This invention relates to a semiconductor device and method for switching or modulating optical signals. The semiconductor device has a photodetector having a low electrical capacitance Cd, a detector absorbing layer for absorbing an optical si... | 01/20/2004 |
| 6661557 | Optical modulator There is provided an optical modulator in which positive holes produced in the valence band are not piled up, the electrostatic capacity can be decreased, the frequency response characteristic is improved, and which is capable of operating at a high speed... | 12/09/2003 |
| 6661556 | Stabilizing electro-absorption modulators (EAM's) performance by maintaining constant absorption with the use of integrated tap couplers An exemplary monolithic stabilized monolithic transmissive active optical device, such as an electroabsorption modulator (EAM), a variable optical attenuator (VOA), or a semiconductor optical amplifier (SOA), with an output optical tap, includes: a substr... | 12/09/2003 |
| 6654153 | Semiconductor saturable absorber-based optical domain optical signal sampling device for sampling an optical signal The optical domain optical signal sampling device is for sampling an optical signal-under-test and comprises a semiconductor saturable absorber, an optical sampling pulse source, an optical signal input and a light detector. The optical sampling pulse sou... | 11/25/2003 |
| 6654155 | Single-crystal-silicon ribbon hinges for micro-mirror and MEMS assembly on SOI material Provided is a micro-electromechanical assembly including an out-of-plane device formed on a device layer of a single crystal silicon substrate. A ribbon structure is formed on the device layer, where the ribbon structure has at least one of a width or dep... | 11/25/2003 |
| 6650456 | Ultra-high frequency interconnection using micromachined substrates The present invention provides a device, a method of making the device, and a system incorporating the same. In one embodiment, the device includes a substrate that has first and second opposing surfaces and first and second thicknesses, wherein the secon... | 11/18/2003 |
| 6646775 | Light source for integrating modulator and module for optical communication An optical device including a substrate, a distributed feedback (DFB) semiconductor laser formed on the substrate and including a diffraction grating having an asymmetrical λ/4 phase shift region, the diffraction grating extending along an optical axis o... | 11/11/2003 |
| 6643047 | Method and apparatus for generating and controlling spin propagation using one or more coherent light beams The present invention uses quantum interference of one and two photon absorption from a multiple color fields to optically inject ballistic spin currents in unbiased photoconductors. The spin currents can be generated with and without an accompanying elec... | 11/04/2003 |
| 6643052 | Apparatus comprising a micro-mechanical optical modulator A micro-mechanical optical modulator having a movable membrane that is spaced from a multi-layer mirror that is disposed on a substrate. The multi-layer mirror includes an anti-reflection layer that is disposed on the substrate, and a coating layer that i... | 11/04/2003 |
| 6643048 | Low-loss electrode structures using resistive connections for optical modulation applications An optical device includes a grounded base and an optical modulator chip having a top surface, a back surface and side surfaces. The optical modulator chip is positioned on the grounded base with the back surface facing the grounded base. The optical modu... | 11/04/2003 |
