19 results about "Optical logic gates" patented technology

The invention discloses an all-optical logic operation system and operation method based on a metasurface device, and mainly solves the technical problems that an existing optical logic gate is high in system complexity, not visual enough in judgment result, high in recognition difficulty, poor in practicability and the like. The logic operation system comprises a polaroid, an object plane, a metasurface device and a detector which are arranged in sequence. The polarizer is used for adjusting the polarization direction of incident light; a plurality of transparent target areas with different shapes are arranged on the object plane and are used for placing corresponding target images; the centers of all the target areas are uniformly distributed on a circle with the center of the object plane as the circle center and d as the radius; incident light reaches the metasurface device after passing through the polaroid and a target image on the object plane, optical logic operation is carried out through the metasurface device, and then the incident light is output to the detector for imaging. The invention has the advantages of simple structure, quick function switching, miniaturization, high integration and the like.

An example optical system having an electro-optical (EO) logic gate connected to a controller is presented. The controller modulates a first encoded electrical signal and a second encoded electrical signal based on an operation selection input. The EO logic gate includes a first Mach Zehnder interferometer (MZI) coupled between an optical input port and an optical output port; a second MZI optically coupled in parallel with the first MZI; a first phase shifter adjacent to the first MZI and; and a second phase shifter adjacent to the second MZI. The phase shifters apply phase shifts to the optical signals propagating via the first and second MZIs based on the modulated first encoded electrical signal and the modulated second encoded electrical signal to cause an optical output at the optical output port to vary based on the logic operation of the first encoded electrical signal and the second encoded electrical signal.

A photonic gate system comprising a center waveguide that is provided with a continuous wave input; a first electrically controlled plasmonic waveguide configured on a first opposing side that is adjacent to the center waveguide; a second electrically controlled plasmonic waveguide configured on a second opposing side that is adjacent to the center waveguide; a first outer waveguide configured adjacent to the first electrically controlled plasmonic waveguide; and a second outer waveguide configured adjacent to the second electrically controlled plasmonic waveguide.

The invention discloses a logic control device based on full Stokes polarization regulation and an imaging system with the logic control device. The logic control device based on full Stokes polarization regulation comprises a polarization device which carries out beam splitting and phase / amplitude coding on incident light and couples light beams of different polarization channels to six polarization channels, and the six polarization channels are a 0-degree / 90-degree linear polarization channel, a 45-degree / 135-degree linear polarization channel and a right-hand / left-hand circular polarization channel; the photoelectric detection device is located at the downstream of the polarization device, the photoelectric detection device is provided with a channel A, a channel B and a channel C, and the channels A, B and C are differential output channels; wherein at least two of the channel A, the channel B and the channel C are selectively activated, and the photoelectric detection device directly converts obtained optical signals into logic output. Polarization response is converted into a logic signal unit, an optical logic gate is reconstructed based on a full stokes state, and an all-optical control logic system driven by polarization is achieved.

The application discloses a nonvolatile reconfigurable compact all-optical logic gate based on a phase change material Sb2Se3 and belongs to the technical field of photonic information devices; the all-optical logic gate structure is designed on an insulating substrate silicon wafer and comprises a first input waveguide A, an intermediate control waveguide C, a second input waveguide B, an intermediate design region and an output waveguide Y. The all-optical logic gate device has an ultra-small footprint of 2.4mu m x 2.4mu m, realizes the reconfigurable characteristic through the nonvolatility of the fused phase change material, realizes four all-optical logic gates of NOT, OR, AND and XOR on the insulating substrate silicon wafer through a direct binary search algorithm (DBS), and simulation results show that the designed device has good logic contrast; the reconfigurable ultra-compact logic gate will become a potential advantage of nanophotonic integrated circuit application.

The application discloses a silicon-based scattering superstructure complementary full-optical logic gate chip, and belongs to the optical device field. The chip comprises a substrate and an optical waveguide structure arranged on the substrate. The optical waveguide structure comprises three input channels connected with an optical signal input end, an optical scattering calculation area and two output channels connected with an optical signal output end. After input optical signals enter the optical scattering calculation area through the input channels, the input optical signals are modulated by a plurality of cylindrical holes arranged in a silicon top layer, multiple reflections, scattering, coherent interference and energy redistribution occur in the optical scattering calculation area, and the input optical signals are coupled to the two output channels through a reverse taper structure. By adjusting the positions and radii of the cylindrical holes, the optical power distribution of the output ports under different input phase combinations is changed, so that the complementary logic operation function is realized. The application has the advantages of small size, simple structure, high function integration degree, easy on-chip manufacturing and suitability for large-scale integration.

The application relates to the technical field of metal micro-nano optical devices, in particular to an electro-optical logic gate device based on a resonant ring-MIM waveguide of surface plasmons, belonging to the technical field of integrated circuit optical networks.The device structure comprises a resonant ring-MIM waveguide combination structure formed by a silicon dioxide slit, and an optical path coupling structure arranged in the MIM waveguide structure and used for controlling the coupling and transmission of optical signals through a voltage signal.The application can break through the diffraction limit by adopting the finite difference time domain (FDTD) method and using the characteristic that the surface plasmons can break through the diffraction limit, and can realize the design, operation and integration of all-optical logic gates on the nanometer scale.The application realizes AND gate, OR gate and XOR gate, and realizes the fast and efficient conversion of different logic functions in the same structure.The application has wide application prospects in the fields of optical signal processing, super-compact photonic integrated devices and sensing technology, helps the miniaturization and multifunctionalization of photonic integrated devices, reduces energy consumption, and gives integrated optical regulation the ability of flexible regulation and information processing.

The application relates to the technical field of image processing, and discloses an image recognition method, system, terminal and storage medium based on a photonic differentiable logic gate network model, the method comprising the following steps: acquiring gray matrix data of an input image, converting the gray matrix data according to a preset optical power mapping rule to obtain an optical power signal; performing optical calculation and processing on the optical power signal through a plurality of logic gate processing units of the photonic differentiable logic gate network model to obtain an optical power signal matrix, and converting the optical power signal matrix to obtain an image feature representation graph; performing classification processing on the image feature representation graph to obtain a plurality of classification features, and identifying all the classification features according to a preset classification rule to obtain an image recognition result. The photonic differentiable logic gate network model is used for training optical logic gates and recognizing images, so that optical calculation and accurate classification and recognition of image features are realized.

The application discloses a kind of full light logic operation system and operation method based on super surface device, mainly solve the system complexity of existing optical logic gate is high, judgment result is not enough intuitive, identification difficulty is big, practicality is poor and other technical problems.The logic operation system includes the polarization plate, object plane, super surface device and detector arranged in sequence;Polaroid is used to adjust the polarization direction of incident light;Object plane is provided with a plurality of different shapes and transparent target areas, for placing corresponding target image;The center of all target areas is distributed on the circle with the center of object plane as the center, d Incident light reaches super surface device after polarization plate and target image on object plane, carries out optical logic operation by super surface device, and then outputs to detector imaging.The application has the advantages of simple structure, rapid function switching, miniaturization, high integration, etc.

The invention provides a photoelectric logic gate device based on a transverse heterojunction and a logic circuit, and belongs to the technical field of photoelectricity. The photoelectric logic gate device comprises a substrate, a functional layer, a first electrode and a second electrode. Wherein the functional layer is arranged on the substrate, the functional layer comprises a first substance region and a second substance region, the first substance region comprises SnS, the second substance region comprises SnS2, and a transverse heterojunction is arranged between the first substance region and the second substance region; the first electrode is arranged on the first material region; the second electrode is disposed on the second material region. The photoelectric logic gate device generates light currents with opposite polarities under irradiation of the first exciting light and the second exciting light, the wavelength of the first exciting light ranges from 280 nm to 564 nm, and the wavelength of the second exciting light ranges from 564 nm to 1033 nm. According to the photoelectric logic gate device, an all-optical logic gate and a hybrid photoelectric logic gate are successfully constructed on a single device, so that the complexity of a photon integrated circuit is effectively reduced, and transmission delay and crosstalk noise caused by interconnection of multiple devices are avoided.

The invention relates to the technical field of photon information devices, in particular to an all-optical logic gate based on two-dimensional material purple phosphorus, a verification method of the all-optical logic gate, an optical calculation chip and a system. The second light path is provided with a second purple phosphorus unit; the signal receiving module is provided with a third purple phosphorus unit; the third purple phosphorus unit is located in the intersection area of the first light path and the second light path. According to the method, a basic Gaussian beam is changed into a diffraction ring based on spatial self-phase modulation by utilizing the nonlinear optical characteristic of two-dimensional material purple phosphorus, and the variation relationship between the nonlinear refractive index of the purple phosphorus and the light intensity is utilized, so that 0 and 1 signals are generated; and then, based on space cross phase modulation, the control light of the first light path controls the phase change of the signal light by influencing the wavefront radius of the signal light of the second light path, so that the 0 and 1 change of the output light signal is realized, and the logic operation of the corresponding logic gate is met.

The application provides a kind of photoelectric logic gate device and logic circuit based on lateral heterojunction, belongs to photoelectric technology field.The photoelectric logic gate device includes substrate, functional layer, first electrode and second electrode.Functional layer is arranged on substrate, functional layer includes first material area and second material area, first material area includes SnS, second material area includes SnS2, and there is lateral heterojunction between first material area and second material area;First electrode is arranged on first material area;Second electrode is arranged on second material area.Photoelectric logic gate device generates photoelectric current with opposite polarity under the irradiation of first excitation light and second excitation light respectively, the wavelength of first excitation light is 280nm~564nm, and the wavelength of second excitation light is 564nm~1033nm.The photoelectric logic gate device of the application successfully constructs all-optical logic gate and hybrid photoelectric logic gate on a single device, thereby effectively reducing the complexity of photonic integrated circuit, and avoiding the transmission delay and crosstalk noise of multi-device interconnection.

A 4×4 optical waveguide encoder, belonging to the field of photonic integration technology, is disclosed. It consists of a substrate, a lower cladding, a core layer, an upper cladding, and electrodes. The core layer and upper cladding are located on the upper surface of the lower cladding, with the core layer encased within the upper cladding. The core layer comprises 16 switching units, 8 phase shifter units, 12 cross-waveguide units, and 16 beam combiner units. This invention achieves a high-density integrated 4×4 optical waveguide encoder with reconfigurable optical logic gates through a driving method using thermo-optical switches as units, in conjunction with phase shifting, cross-waveguide, and beam combining units. This technology is suitable for constructing programmable photonic integrated networks and has broad application prospects in big data centers and ultrafast computing systems. Compared to traditional encoders, this invention employs a scheme of multiple cascaded metal thermoelectrodes, which greatly simplifies the circuit control scheme; the scheme of controlling the coupling state by heating with metal thermoelectrodes reduces the size of the unit structure and improves the integration density.

The application discloses a kind of photochromic encryption system and its application in optical logic gate encryption, it is related to optical encryption technical field.The photochromic encryption system of the application includes carrier and the encryption information layer being arranged on carrier, the encryption information layer is formed by the combination of the coating area of four different encryption inks, the four different encryption inks are respectively: the mixture of DASA-1 and polyurethane solution;The mixture of DASA-2 and polyurethane solution;The mixture of DASA-3 and polyurethane solution;The mixture of DASA-2 and polystyrene.The photochromic encryption system of the application only needs to realize logic gate control by external light stimulation, without transmitting information by other signal carriers such as electron or other charged particles, compared with the existing logic gate element based on the principle of electronics, the information transmission speed is fast, and it is easier to implement, more conducive to the application of logic gate.

Systems and method directed to stochastic optical computing architecture with reconfigurable logic and accumulation are disclosed. In one embodiment, an optical logic gate includes a single microring resonator having an input port and an output port; one or more input terminals connected to apply logic signals to the microring resonator; and a tuning component to shift a resonance frequency of the microring resonator, wherein a transmission between the input port and output port of the microring resonator performs a logic operation on signals applied to the one or more input terminals.

The application discloses a surface plasmon all-optical logic device and a use method, belongs to the technical field of integrated circuits, utilizes the photorefractive effect of tungsten, has a femtosecond-level response time when femtosecond laser irradiates tungsten, thereby solving the slow operation defect of an electronic logic gate, and improving the computing capacity and signal transmission capacity. The application introduces tungsten into both sides of a waveguide and utilizes the photorefractive effect of tungsten as an innovation point; the all-optical logic device is optically modulated by tungsten, utilizes the characteristic that surface plasmons can break through the diffraction limit, realizes the operation and integration of all-optical logic gates on a nanometer scale, further reduces the size of all-optical logic gates, and the response time is all within 150 femtoseconds, thereby greatly improving the modulation speed. The application can be applied in the fields of optical computing and integrated optical regulation.

The invention discloses a silicon-based reconfigurable optical logic gate structure based on a uniformly distributed phase change material, which is characterized in that a 6 [mu] m * 6 [mu] m waveguide region is designed on a silicon-based substrate, and the silicon-based reconfigurable optical logic gate structure comprises two bent input waveguides, a bias input waveguide and two output ports. The middle design area is etched into a 7 * 7 nanopore array, the pores are filled with phase change materials, and the materials can be switched between a crystalline state and an amorphous state so as to change the refractive index. The phase state of the phase change material is changed through an external electric heating control, so that the device is equivalent to different logic gate structures in different refractive index states, and the functions of an AND gate, an OR gate, an XOR gate and an XNOR gate can be reconfigured on the same chip. According to the invention, a binary particle swarm optimization algorithm is also adopted to optimize hole array arrangement so as to maximize the logic function output contrast. The device is excellent in output contrast ratio under the wavelength of 1550 nm, and expected logic function switching can be achieved. The reconfigurable optical logic gate is compact in structure, non-volatile and flexible in function, and a potential scheme is provided for integrated optical calculation.

The application discloses a reconfigurable all-optical logic gate implementation device and method based on a polarization modulator, and belongs to the field of optical communication and microwave technology. The device comprises a laser, a polarization modulator, an electric coupler, two PCs, a polarizer and a photodetector. The device and method are based on the microwave photon phase shift principle, and baseband data is introduced into the signal phase. Meanwhile, by using the polarization control technology, output photocurrents in different electric level states can be obtained. Due to the continuity of the polarization control, when six different adjustable phase differences are introduced, the system output electric level presents six different logic functions. The application has high practicability, and can be widely applied to high-speed optical computing, optical networks and optical signal processing and other optical systems.

The application realizes free switching of seven operation functions of and, or, not, and not, or not, exclusive or and same or by using single device structure and simple electrical control. Transition metal sulfide and other plating materials are transferred to waveguide structures such as micro ring cavities; the resonance intrinsic wavelength of the micro ring cavity is tuned by controlling the free carrier concentration of the plating layer by bias voltage, the two light fields carrying input bits change the free carrier concentration of the plating layer to cause the resonance wavelength shift of the micro ring cavity; the output light fields from the straight-through port and the upload and download ports will have characteristics related to the incident light fields; by adjusting the resonance intrinsic wavelength and selecting the output port, various logic operations are realized. The application can realize various all-optical logic operations by using a single structure, does not need high-speed electrical signal control and is highly compatible with the existing preparation process, as a kind of general all-optical logic gate device, lays a solid foundation for building a chip integrated super large scale all-optical computing system.