|
Match
|
Document |
Document Title |
|
|
7142309 |
Method and device for measuring half-wave voltage of Mach-Zehnder type optical modulator
A method and a device for measuring the half-wave voltage of a Mach-Zehnder type optical modulator accurately and without depending on the bias variation of an optical modulator. The method of...
|
|
|
7126741 |
Light modulator assembly
A light modulator assembly includes a substrate, a micro-electro mechanical semiconductor device (MEMS device) formed on the substrate, and a temperature control device coupled to the substrate and...
|
|
|
7126739 |
Method and apparatus for optical pulse characterization using simplified chronocyclic tomography
A method and apparatus for characterizing light from an optical source using simplified chronocyclic tomography by modulating the phase of light from an optical source using alternating positive...
|
|
|
7127129 |
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 with reduced optical loss. In one embodiment, an apparatus includes a first region of an optical waveguide disposed in...
|
|
|
7119939 |
Phase modulation circuit, test apparatus, and communication system
A phase modulation circuit for outputting a modulated signal of an input signal which has been modulated to a desired phase. The circuit includes a light emitting element for emitting light...
|
|
|
7110154 |
Plasmon-photon coupled optical devices
The present invention is directed to optical devices. More specifically, the disclosed devices include a film defining a periodic array of surface elements so as to give rise to surface plasmon...
|
|
|
7088491 |
Pulse generating apparatus and method
An apparatus and method generating an optical pulse of picosecond class (having a high duty ratio), which accurately and stably operates at an arbitrary repetition frequency, has a high OSNR, and...
|
|
|
7072092 |
Optical substrate with modulated structure
There is provided an optical substrate. The optical substrate includes at least one surface. The at least one surface includes at least one optical structure having a shape and dimensions, wherein...
|
|
|
7057788 |
Spatial light modulator and light pulse waveform controller
A chirp compensation dielectric multilayer film mirror ( 10 ) reflects an incident light in a predetermined wavelength range and has group delay characteristics that prevent at least one of the...
|
|
|
7046446 |
Speckle reduction for display system with electromechanical grating
A method for displaying an image including: forming at least three light beams by diffraction at a single linear light modulator, wherein the at least three light beams have substantially equal...
|
|
|
7039259 |
Fiber optical gain equalizer
A fiber optical device, whose wavelength profile can be dynamically controlled in real time by the application of control voltages. The device can be used as a fiber optical gain equalizer or a...
|
|
|
7027669 |
Methods and apparatus for optical pulse generator with progressive phase shift
Systems and techniques for generating optical pulses exhibiting a progressive phase shift, and the use of those pulses to transmit data, are described. One embodiment of the invention employs a...
|
|
|
7023256 |
Differential coder for electrical signals
The present invention relates to a differential coder ( 10 ) for electrical signals comprising control means ( 21, 22 ) and a bistable T adapted to deliver an output binary data signal (S, S*). The...
|
|
|
7024056 |
Electro-optic gating arrangement with improved duty cycle
The device includes an oscillator ( 1 ) to generate an electrical signal of a predetermined frequency and a signal divider ( 2 ) to split the electrical signal into first and second signals. The...
|
|
|
7019882 |
Generation of M-ary digital signaling constellations directly at lightwave frequencies
A coherent optical link includes a laser master oscillator operative to generate an amplitude- and phase-stable narrow linewidth optical carrier, a first programmable read-only memory (PROM) having...
|
|
|
7006715 |
Optical modulator of clock modulation type
A first optical waveguide, a second optical waveguide, a first electrode, and a second electrode are integrated on a substrate. An optical modulator is provided with a clock signal generator for...
|
|
|
7002724 |
Apparatus and method for generating a 90° alternate phase optical pulsetrain
Various apparatus and methods for generating a 90° AP optical pulsetrain. In one embodiment, the apparatus includes: (1) a phase-modulated optical signal generator configured to generate a...
|
|
|
6985652 |
Optical switching device and optical device
An optical switching device including a substrate and at least an organic film as a light control part formed on the substrate. Optical switching is performed by applying signal light and control...
|
|
|
6985373 |
Binary beam steering device
An element for steering electromagnetic beams. The element includes a phase change material in combination with dielectric and other layers in a multilayer optical stack. The phase change material...
|
|
|
6978069 |
Polymer guest-host systems and polymer electro-optic waveguide systems
An electro-optic system in accordance with an embodiment of the present invention comprises a high glass transition temperature (Tg≧about 210° C.) polymer matrix featuring aromatic groups on the...
|
|
|
6975781 |
Characteristic adjustment method of multistage Mach-Zehnder interferometer type optical circuit and multistage Mach-Zehnder interferometer type optical circuit
A multistage Mach-Zehnder interferometer type optical circuit including any number of symmetrical Mach-Zehnder interferometers and any number of asymmetrical Mach-Zehnder interferometers connected...
|
|
|
6965479 |
Optical filter, interleaver, and optical communication system
A first optical system ( 11 ) has a first beam splitter ( 211 ). The first beam splitter ( 211 ) splits light arriving through a first optical path (P 1 ) into two light beams, and outputs one...
|
|
|
6961166 |
Optical digital external modulator
An optical digital external modulator having a cascaded arrangement of interferometers is provided. The optical modulator includes an electrode structure for applying an electric field to each...
|
|
|
6961169 |
Light-controlled light modulator
A light-controlled light modulator can achieve high-speed, low-loss wavelength conversion. Continuous light with a wavelength λj is launched into an MMI coupler via a port, and is split into two...
|
|
|
6954558 |
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 with reduced optical loss. In one embodiment, an apparatus includes a first region of an optical waveguide disposed in...
|
|
|
6952307 |
Electric field poling of ferroelectric materials
A method of inducing a periodic variation of nonlinearity in a sample of ferroelectric material, comprises applying an electrically insulting mask to surface of the sample, applying an electric...
|
|
|
6950222 |
Apparatus and method for optical modulation
An optical modulator includes a phase modulator configured to drive light with an NRZI-coded drive signal for phase modulation and an intensity modulator to modulate the intensity of a...
|
|
|
6947193 |
Optical phase modulator
To provide a phase modulator for introducing a topological phase, which is designed to produce any desired phase shift between zero and 360°, the phase modulator has means, at least one...
|
|
|
6943931 |
Ultra-high linearized optical modulator
The invented modulator provides ultra-high linearity (SFDR=147 dB-Hz), high tolerance, low loss, simple architecture, and low cost. It is based on unique combination of phase-modulator (PM) and...
|
|
|
6940638 |
Optical frequency conversion systems and methods
Optical frequency conversion systems and methods are described. In one aspect, an optical frequency conversion system for generating a frequency-shifted replica of an input optical signal includes...
|
|
|
6937381 |
Optical pickup device
An optical pickup device which includes (A) a light source, and (B) an objective lens and an aberration correcting optical system which are located in a light path from the light source to an...
|
|
|
6928199 |
Tunable optical device for dynamic chromatic dispersion and polarization mode dispersion compensation
The present invention provides a controllable double cladding guiding structure for tunable phase delay, dynamic chromatic dispersion and polarization mode dispersion compensation. The device...
|
|
|
6909531 |
Optical (de-)interleaver and method of (de-)interleaving optical signals
The invention relates to an interleaver circuit ( 10, 10 ′) for interleaving optical signals, comprising a first and a second input port ( 12, 14 ), an output port ( 16 ), a first optical filter...
|
|
|
6906839 |
System and method for recovering phase information of a wave front
A system and method for recovery of phase information from recorded intensity values is disclosed. In one aspect, a phase filter is placed in a plane, which may be the back focal plane (BFP) of a...
|
|
|
6897992 |
Illuminating optical unit in image display unit, and image display unit
Disclosed is an illuminating optical unit in an image display unit for displaying an image by irradiating a GLV (spatial modulation device) with a laser beam and modulating the laser beam based on...
|
|
|
6891653 |
Method and apparatus for steering an optical beam in a semiconductor substrate
An optical steering method and apparatus. In one aspect of the present invention, the disclosed apparatus includes a multi-mode interference (MMI) device disposed in a semiconductor substrate. The...
|
|
|
6885490 |
Method and apparatus for characterizing optical pulses using reduced complexity chronocyclic tomography
A method and apparatus for characterizing an optical pulse using a reduced complexity chronocyclic tomography is described. In one example, an optical pulse train is modulated using quadratic...
|
|
|
6882460 |
Phase angle controlled stationary elements for long wavelength electromagnetic radiation
An element for reflecting, transmitting, focusing, defocusing or wavefront correction of electromagnetic radiation in the terahertz frequency range. The elements include a grid of conductive strips...
|
|
|
6879427 |
Shear inducing beamsplitter for interferometric image processing
A shearing generator comprising: an input light source; an image generator that generates two images of the input light source at an output plane, the image generator comprising a beam splitter...
|
|
|
6879738 |
Method and apparatus for modulating an optical beam in an optical device
An apparatus and method for modulating an optical beam. In one embodiment, a method according to embodiments of the present invention includes splitting first and second optical beams having first...
|
|
|
6879426 |
System and method for programmable polarization-independent phase compensation of optical signals
A system and method for programmable phase compensation of optical signals is disclosed. The systems and methods include the use of a polarization-independent spatial light modulator (PI-SLM), so...
|
|
|
6859304 |
Photonic crystals and devices having tunability and switchability
A photonic crystal having reversibly tunable photonic properties. The photonic crystal includes a phase change material having a plurality of structural states that vary with respect to fractional...
|
|
|
6842297 |
Wavefront coding optics
Improved Wavefront Coding Optics, which apply a phase profile to the wavefront of light from an object to be imaged, retain their insensitivity to focus related aberration, while increasing the...
|
|
|
6842285 |
Method and apparatus for generating a phase-modulated wave front of electromagnetic radiation
The present invention provides a method and a system for generating a phase-modulated wave front. According to the present invention, the spatial phase-modulation is not performed on the different...
|
|
|
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...
|
|
|
6825966 |
Optical phase shifting device
An electrically adjustable phase-shifting device is arranged on a substrate comprising at least a first waveguide designed for guiding optical signals and a thermoelectric element arranged adjacent...
|
|
|
6825963 |
Optical element
In the invention, light incident onto an end surface of one-dimensional photonic crystal is phase-modulated in the same period and direction as those of the photonic crystal to thereby propagate...
|
|
|
6819468 |
Image projection apparatus and method
An image projection apparatus and method includes a light separating unit that separates white light into monochromatic lights of different wavelengths, and then forms a plurality of monochromatic...
|
|
|
6798558 |
Optical clock multiplier and method thereof
An optical clock multiplier comprises a phase modulator ( 12 ) to shift a phase in pulse duration of an input optical clock pulse by π, a polarization mode dispersion device ( 16 ) having a...
|
|
|
6798557 |
Direct optical N-state phase shift keying
A unique optical encoder is employed that utilizes an optical phase modulator, in which an arbitrary phase shift can be realized. The phase modulator is driven by an electrical signal, where the...
|