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7426444 Methods for determining relative phase differences in entangled quantum states  
Various embodiments of the present invention are directed to methods for determining a phase shift acquired by an entangled N-qubit system represented by a NOON state. In one embodiment, a probe...
7409131 All-optical logic gates using nonlinear elements—claim set V  
An all-optical logic gates comprises a nonlinear element such as an optical resonator configured to receive optical input signals, at least one of which is amplitude-modulated to include data. The...
7408235 Quantum coherent switch utilizing commensurate nanoelectrode and charge density periodicities  
A quantum coherent switch having a substrate formed from a density wave (DW) material capable of having a periodic electron density modulation or spin density modulation, a dielectric layer formed...
7388703 Optical transmission device and optical phase modulator  
An optical transmission device includes an optical phase modulator and a signal generation function. The optical phase modulator is controlled, so that when the state of an intensity-modulated...
7359101 Tests of quantum information  
Quantum testing can compare unknown photon states in a manner suitable for a validation check of a quantum digital signature, testing of the operation of a quantum gate, or detecting of...
7355769 Method and apparatus for single-photon source and quantum memory  
An optical switch and optical storage loop are used as the basis of a single-photon source and a quantum memory for photonic qubits. To operate as a single-photon source, the techniques include a...
7254304 Devices and techniques for logical processing  
The invention is directed to apparatus, methods, systems and computer programs which permit a simplification or reduction of the description of a complex digital circuit. This is accomplished by...
7248400 Embodying equipment and method for an all-optical or logic gate by using single SOA  
Disclosed herein is an apparatus and method for implementing an all-optical OR logic gate. The apparatus includes an optical pulse generator, a Mode-Locked Fiber Laser (MLFL), a first optical...
7180645 Quantum-state-generating apparatus, Bell measurement apparatus, quantum gate apparatus, and method for evaluating fidelity of quantum gate  
An apparatus for generating a quantum state of a two-qubit system including two qubits, each qubit being represented by a particle which invariably travels through one of two paths, includes a...
7145704 Optical logic gate based optical router  
A switching element capable of being used in an optical processing device includes an optical signal separator operable to separate a multiple wavelength optical signal into one or more optical...
7133173 Nonlinear electromagnetic quantum information processing  
Nonlinear electromagnetic elements can efficiently implement quantum information processing tasks such as controlled phase shifts, non-demolition state detection, quantum subspace projections,...
7130093 Optical implementation of bounded non-deterministic Turing Machines  
Method and an optical computation device for obtaining an indication about the existence of a feasible solution for a bounded instance of a problem that belongs to the non-deterministic polynomial...
7126731 Optical latch based on lasing semiconductor optical amplifiers  
An optical latch based on a lasing semiconductor optical amplifier is disclosed. The optical latch is configured to achieve one or more stable states in response to the input of predetermined...
7126106 Quantum computer and quantum computation method  
Quantum computer includes optical systems arranged in series each of the plurality of optical systems includes first half-wave plate, first polarizing beam splitter, first switching mirror, first...
7123407 Apparatus and method for realizing all-optical NOR logic device using gain saturation characteristics of a semiconductor optical amplifier  
The present invention relates to an apparatus and a method for realizing all-optical NOR logic device using the gain saturation characteristics of a semiconductor optical amplifier(SOA). More...
7113329 Optical logical circuits based on lasing semiconductor optical amplifiers  
This disclosure is concerned with digital optical circuits, including an optical astable multivibrator. In one example, an optical astable multivibrator is provided that includes a lasing...
7085029 Dynamic phase logic gate  
A logic device for use with data signals having a continuously or semi-continuously varying waveform of substantially fixed frequency. The device provides a logical output from at least one of the...
7081979 Bit differential processing  
There is provided an apparatus for processing a segment of x optical bit slots from a packet comprising y optical bit slots, each bit slot defining a respective one of first and second...
7019875 Method and apparatus for single-photon source and quantum memory  
An optical switch and optical storage loop are used as the basis of a single-photon source and a quantum memory for photonic qubits. To operate as a single-photon source, the techniques include a...
6995404 Techniques for quantum processing with photons and the zeno effect  
Techniques are provided that use the quantum Zeno effect to implement practical devices that use single photons as the qubits for quantum information processing. In the quantum Zeno effect, a...
6990281 All optical logic gates  
An optical AND logic gate includes a summing gate having first and second inputs for receiving first and second optical signals, and a threshold device. The gate produces an output corresponding to...
6987607 Optical AND gate and waveform shaping device  
The method according to the present invention includes the steps of inputting an optical signal having a first wavelength and probe light having a second wavelength different from the first...
6963677 Optical memory and logic using cross-switches  
An all-optical, asynchronous binary storage cell implemented by optically induced total internal reflection cross-junction waveguide switches. The term “all-optical” refers to directing of...
6943925 Optical logic gate based optical router  
A switching element capable of being used in an optical processing device includes an optical signal separator operable to separate a multiple wavelength optical signal into one or more optical...
6930826 All-optical XOR gate by using semiconductor optical amplifiers  
The present invention relates to a method of embodying all-optical XOR logic gate by using semiconductor optical amplifier, and more particularly, to a technique to embody all-optical XOR logic...
6917739 Optical cache memory  
An optical memory having an input port for receiving an input optical signal to be stored in the optical memory is disclosed. A portion of the optical signal is coupled to a storage loop for...
6859576 Optical cross-connect system  
An optical cross-connect system is disclosed that use reduces the number of AWGs (Arrayed-Waveguide Grating) as compared to prior art systems so that the hardware complexity is reduced while...
6853765 MEMS optical switch with thermal actuator  
A MEMS type optical switch includes a substrate, the substrate including at least one groove formed therein; first and second optical fibers disposed in the at least one groove, the at least one...
6853658 Optical logical circuits based on lasing semiconductor optical amplifiers  
Optical logic circuits are based on lazing semiconductor optical amplifiers, such as vertical lazing semiconductor optical amplifiers. For example, one or more VLSOAs with selected depletion...
6834135 Optical switching system  
An optical switching system that switches the output port of an optical signal as indicated by address information (a label) that is contained in optical data packets constituting the optical...
6831604 Optical control electromagnetic wave circuit  
An optical control electromagnetic wave circuit comprises a unit composed of a semiconductor layer, a transparent substrate, and a transparent grounded conductive layer and a displaying unit. The...
6819474 Quantum switches and circuits  
Quantum switches, referred to as trisistors, operate on the basis of interactions between two elementary particles (EP), such as photons, electrons, phonons, etc. A first EP is used as a control...
6804433 Optical pulse pattern generator  
An optical pulse pattern generator can generate optical pulse signals with various periods and patterns. It supplies an optical pulse from an optical pulse source to a variable optical delay line...
6804047 All-optical or gate embodied by using semiconductor optical amplifiers  
The present invention is related to an all-optical OR device embodied by using the gain saturation and wavelength conversion characteristics of semiconductor optical amplifier (SOA), and more...
6801349 Implementation method of an all-optical half adder by using SOA-based devices and an apparatus thereof  
The present invention relates to an implementation method of all-optical half adder by using semiconductor optical amplifier(SOA)-based devices and the apparatus thereof. In more detail, it relates...
6788840 Bi-stable micro-actuator and optical switch  
A bi-stable micro-actuator is formed from a first and a second silicon-on-insulator wafer fused together at an electrical contact layer. A cover with a V-groove defines an optical axis. A...
6778303 N-valued optical logic architecture and method  
An architecture for optical logic gates is presented in which N predetermined wavelengths of light are used to define data. This data is manipulated by N-valued optical logic gates based on a set...
6771847 Optical switch using multimode interferometer, and optical demultiplexer  
A first multimode interferometer has a first input port to which an optical signal is applied, a first output port, and a second output port. A first optical waveguide is connected to the first...
6760136 Method and apparatus for configuring quantum mechanical state, and communication method and apparatus using the same  
If a quantum mechanical state including a plurality of two-level systems (x 1 , x 2 , . . . , x 2p+1 ) is expressed by a superposition of orthonormal bases in which each two-level system assumes a...
6741374 Techniques for performing logic operations using quantum states of single photons  
A method and apparatus for performing logic operations using quantum polarization states of single photons, include a first polarizing beam splitter having first input spatial modes and first...
6693732 Optical sampler based on stable, non-absorbing optical hard limiters  
An optical sampler based on stable, non-absorbing optical hard limiters includes an optical feedback loop for storing an optical signal in optical form. The optical feedback loop includes...
6647163 Optical memory apparatus and method  
An optical memory suitable for storing optical signals from a set of predetermined wavelengths is demonstrated. This memory is random access, allowing a controller to read the stored data at any...
6636337 Optical switching device based on stable, non-absorbing optical hard limiters  
An optical switching device based on stable, non-absorbing optical hard limiters optically switches optical information from an input to a number of outputs based upon address information contained...
6624929 All-optical logic AND operation in a SOA-based Mach-Zehnder interferometer  
The present invention relates to the all-optical logic AND operation in a SOA (semiconductor optical amplifier)-based Mach-Zehnder interferometer. More particularly, it relates to the technology...
6559989 Optical packet header processing apparatus for optical packet switch  
An optical packet header processing apparatus for processing a header of an optical packet expressing an address of a destination node to control a switching operation of an optical packet switch....
6549314 Optical control apparatus, optical junction apparatus, optical ADM apparatus and optical transmission apparatus having thereof  
An optical control apparatus having an optical reflector for selectively reflecting signal light having a specific wavelength, transmitting and outputting signal light having another wavelength and...
6545786 Optical self-routing scheme with low optical loss and compact size  
The present invention relates to a routing address encoder, a routing controller, and a routing switch, which decrease the number and the length of optical splitting and optical delay line at...
6483614 Coupler-based programmable phase logic device  
A coupler-based programmable phase logic device operates using coherent optical or microwave signals. The device is composed of a mixing stage and a logic stage and utilizes 3-port and 4-port...
6462865 All-optical logic with wired-OR multi-mode-interference combiners and semiconductor-optical-amplifier inverters  
A novel semiconductor optical amplifier (SOA) can operate as an optical inverter as well as a power-restoring device. Together, an optical-OR and the optical inverter can provide a wide variety of...
6437887 Optical logic device and optical memory device  
An optical logic device comprises a dielectric block arranged such that a driving light is incident on one plane thereof at a total reflection critical angle through an interior thereof, a metallic...
Matches 1 - 50 out of 144 1 2 3 >