355results about "Logic circuits using opto-electronic devices" 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.

The invention provides a bias voltage providing circuit of an avalanche photodiode and a PON gateway, and relates to the technical field of optical communication. The bias voltage providing circuit of the avalanche photodiode comprises a bias voltage input unit, a bias voltage control input processing unit and an avalanche photodiode protection unit. When the illumination intensity of the target avalanche photodiode exceeds the preset illumination intensity, the photo-generated current of the target avalanche photodiode exceeds the preset current, and the avalanche photodiode protection unit responds to the situation that the photo-generated current of the target avalanche photodiode exceeds the preset current. The diode bias voltage applied to the target avalanche photodiode is reduced, so that the photo-generated current of the target avalanche photodiode is reduced, and overload protection of the target avalanche photodiode is completed. Based on the above content, the problem that the target avalanche photodiode is easy to damage due to overload in the prior art can be improved.

The invention discloses a nanosecond high-voltage steep pulse generator, which relates to the technical field of high-voltage pulses and comprises a microcontroller, a Marx circuit, a trigger control module, an isolation high-voltage driving module, a safety module and a power management module, the microcontroller comprises a main chip, and parameters of the output end of the Marx circuit are collected in real time through the microcontroller. The trigger control module generates a nanosecond synchronous trigger signal; the isolation high-voltage driving module converts a low-voltage signal of the microcontroller into a high-voltage driving signal; the safety module is used for monitoring the state of the system, immediately cutting off a trigger signal when a fault occurs, and protecting the Marx circuit and the microcontroller; according to the invention, the microcontroller is used for generating synchronous trigger pulses and accurately triggering charging and discharging of the capacitor of the Marx circuit, and the high-speed ADC arranged inside can accurately control and detect voltage balance, trigger signals and fault protection.

The invention discloses an embedded special high-frequency low-level control system, which comprises a digital signal processing board card, an ADC / DAC sub-board card and a radio frequency front-end board card, the radio frequency front-end board card comprises two paths of up-conversion channels and six paths of down-conversion channels; the digital signal processing board card comprises an FPGA (Field Programmable Gate Array); wherein the radio frequency front-end board card is used for dividing an input reference line RF signal into four paths of RF reference signals and generating an LO signal; the ADC / DAC sub board card is used for ADC analog-to-digital conversion and DAC digital-to-analog conversion; the main functions of the digital signal processing board card comprise clock distribution of RF reference signals, a motor drive and piezo ceramic drive circuit, a data acquisition and logic control algorithm of an FPGA logic unit PL part, an embedded ARM system of an FPGA processor unit PS part, EPICS-IOC application of a low-level system, network data communication and the like.

According to the topological defect cavity based on the valley photonic crystal and the multi-channel logic device comprising the topological defect cavity, an edge mode, protected by topology, in the topological photonic crystal can resist the influence of backscattering, and a brand new thought is provided for solving the problem of high reflection loss of a defect cavity-waveguide direct coupling system under non-resonant frequency. The topological defect cavity is designed based on the valley photonic crystal, and compared with a traditional photonic crystal defect cavity, low reflection loss can be achieved when the topological defect cavity is directly coupled with the waveguide. Besides, the resonant frequency and mode symmetry of the topological defect cavity have flexible tunability, and the multi-channel logic device based on the topological defect cavity and the harpoon type energy beam splitter is provided by utilizing the characteristics of low reflection loss and tunable resonant frequency of the topological defect cavity. According to the logic device, the output result of the harpoon beam splitter can be reserved, meanwhile, more diversified output results are achieved, and the important application value of the topological defect cavity in the integrated micro-nano photonics is reflected.

The invention discloses a multi-field adjustable high-speed electro-optical logic device and an implementation method thereof. According to the invention, light output is electrically controlled, and two logic functions are realized on the same device; the input laser wavelength comprises a main communication wave band, and a PL output signal is matched with an atmosphere window, so that information transmission is facilitated; the working switch ratio of the logic device is greater than two orders of magnitude, static power consumption is reduced, and the anti-interference capability and the accuracy of logic operation are improved; the response time is short, the key effect on improving the operation speed is achieved, and high-frequency work is supported; a PL output signal is sensitive to polarization, so that the degree of freedom of transmitted information is higher; the method is applied to the fields of encryption transmission of efficient optical communication, logic operation in an all-optical chip and the like; not only is the working switch ratio as high as 2 orders of magnitude shown, but also the nanosecond-order response speed can be maintained, so that the method has great potential to solve the problems in the science and technology fields such as encryption transmission of efficient mid-infrared light communication.

The invention discloses a bipolar high-voltage pulse driving circuit and driving method of an air coupling ultrasonic transducer, the driving circuit comprises a control circuit, an auxiliary power supply circuit, a pulse transmitting unit and a high-voltage output unit, and the high-voltage output unit comprises a high-frequency inverter circuit, a high-frequency transformer T1 and a voltage doubling rectifying circuit. According to the bipolar high-voltage pulse driving circuit and the driving method, a bipolar high-voltage controllable excitation signal can be generated while the high-voltage driving requirement of the ultrasonic transducer is met by only one low-voltage power supply, and the received ultrasonic energy is remarkably improved.

A computing system may be provided. The computing system may include an optical memory cavity configured to store signal pulses representing a current combination for a combinatorial optimization computation. The computing system may further include an optical processing cavity. The optical processing cavity may be configured to receive the signal pulses from the optical memory cavity, perform an all-optical 1-bit delay computation on the signal pulses to generate a feedback pulse for at least one signal pulse, and provide the feedback pulse to be coupled back to the optical memory cavity.

Photonic controlled-phase gates that include a dipole emitter chirally coupled to a plurality of photonic qubit pairs in a waveguide are disclosed herein. Each photonic qubit pair includes a two-qubit state |xy, wherein the two-qubit state |xy comprises a combination of single-qubit states |0 and |1, and may be |00, |01, |10, and |11. The dipole emitter is configured to interact with the single-qubit state |0 to impose a π phase shift, and the dipole emitter interacts with states |00, |01, and |10 to impose the π phase shift.

According to the method and system for achieving orbital angular momentum multiplier multiplexing based on the metasurfaces, two cascaded metasurfaces are arranged, the first metasurface executes different orbital angular momentum multiplication on circularly polarized light which is incident in a left-and-right rotation mode at an input plane to convert phases, and the second metasurface executes different orbital angular momentum multiplication on circularly polarized light which is incident in a left-and-right rotation mode; the left-hand circularly polarized light and the right-hand circularly polarized light respectively execute multiplication operation of different orders; and the light beam evolves after being propagated for a certain distance, and is output after being subjected to phase collimation by the second metasurface at the output plane, so that multiplexing of different order multiplication functions of vortex light orbital angular momentum on the metasurface is realized. According to the method, the multiplication order of the orbital angular momentum is remarkably increased while the complexity of the system is not increased, the method can work in a broadband, the robustness is good, and the method is suitable for highly integrated and miniaturized development of an optical system.

To provide a light-gated element including a light sensing layer capable of responding to light stimulation and exhibiting neuromorphic characteristics, and a method of manufacturing the same.SOLUTION: A method of manufacturing a light-gated element comprises: preparing a first heating furnace and a second heating furnace spaced apart from each other in the same space; positioning a second precursor, which is prepared by mixing tungsten trioxide (WO3) as a transition metal oxide and sodium chloride (NaCl) as a metal halide salt in the second heating furnace, and a substrate to be adjacent to the second precursor; forming a light sensing layer including a transition metal dichalcogenide flake on top of the substrate; and performing vapor deposition of a source electrode and a drain electrode to form junctions in the light sensing layer; and forming a gate electrode under the substrate; where a mixing ratio of the transition metal oxide and the metal halide salt is between 5:1 and 7:1 by weight, and where the light-gated transistor is a logic element that performs an AND or OR logical operation.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of electronic and electrical engineering, and discloses a mining differential signal intrinsic safety isolation data processing system which comprises a power supply circuit unit, a photoelectric isolation unit, a communication interface unit and a CPU data processing unit. The system adopts a double-isolation power supply design, so that physical isolation of intrinsic safety and non-intrinsic safety sides is ensured, the safety and reliability of the circuit are improved, physical isolation and differential transmission of data signals are realized through the photoelectric isolation unit and the differential signal conversion circuit, energy transmission and interference are effectively prevented, the circuit is protected from being damaged, and the reliability of the circuit is improved. Secondly, the CPU data processing unit can efficiently execute logical operation and data processing tasks, data receiving and transmitting and seamless communication with external equipment are achieved by controlling the optoelectronic isolation and communication interface unit, and finally, a CPU operation indicating circuit and a program downloading and debugging interface are further designed in the system.

An artificial neuron unit for processing a signal is presented, comprising: a fiber-based optical processing unit having first and second optical input ports and first and second optical output ports, configured and operative to controllably apply optical processing to incoherent input optical signals to generate first and second weighted combined optical signals; and an electro-optical processing unit configured and operative to process the first and second weighted combined optical signals, the electro-optical processing unit configured and operative to generate a weighted sum output of the artificial neuron unit by successively performing the steps of applying a predetermined mathematical function to the first and second weighted combined optical signals corresponding to positive and negative weights to generate a resultant signal, and applying nonlinear processing to the resultant signal to convert the resultant signal into an optical output signal indicative of the weighted sum output of the artificial neuron unit.

A gate apparatus configured to perform an XOR operation on received input signals to provide a logical output signal, y. The apparatus includes at least one first signal input adapted to receive a first input signal; and at least one second signal input adapted to receive a second input signal. At least one of the received input signals is split into a first split signal portion fed to a photo diode to generate an electrical photocurrent supplied to a junction node, and a second split signal portion combined with at least a signal portion of the other signal received at the second signal input to generate a combined optical output signal supplied to an electro-optical modulator to provide the logical output signal, y. The electro-optical modulator is driven by a photocurrent processing unit having an input connected to the junction node.

The invention discloses a PWM control circuit and method, and the circuit comprises a control unit and a first sampling unit, the control unit is connected with a peripheral circuit, and the control unit is used for obtaining a target control parameter, generating a first PWM signal according to the target control parameter, and outputting the first PWM signal to the peripheral circuit; the first sampling unit is connected with the control unit, the first sampling unit is used for acquiring a first real-time control parameter and outputting the first real-time control parameter to the control unit, the first real-time control parameter is a real-time control parameter of the first PWM signal, and the control unit adjusts the first PWM signal by using the first real-time control parameter, so that the first real-time control parameter is consistent with a target control parameter.

An optical gate device may have one or more optical cavities. The optical cavity may have an embedded optically-active material providing strong light-matter coupling. A pump input allows application to of a pulsed optical pump beam the optically-active material. The pump beam is absorbed by the optically active material to form an exciton-polariton condensate which emits light. The optical gate device may have an input waveguide to input a seed signal to the optical cavity. The optical gate device may include an output waveguide to output of an optical signal at a wavelength corresponding to a resonant mode of a the cavity. The device may operate in a manner such that, when the pump beam is applied to the pump input, an optical output signal is selectively provided in the output waveguide, via the input of the a seed signal and light emitted by the exciton-polariton condensate.

The utility model discloses a voltage and current rapid acquisition digital control circuit, which comprises a multi-channel digital-to-analog conversion circuit, and a voltage photoelectric isolation acquisition circuit and a current rapid acquisition circuit which are connected with the multi-channel digital-to-analog conversion circuit, and the multi-channel digital-to-analog conversion circuit comprises a multi-channel ADC chip. The output end of the multi-channel ADC chip is connected with an FPGA processor, and the multi-channel ADC chip is used for converting the analog quantity of accessed voltage and current signals into digital quantity data and transmitting the digital quantity data to the FPGA processor in a bus mode. According to the utility model, the photoelectric isolator whose maximum delay time from input to output does not exceed 3.3 [mu] s can be used to realize signal photoelectric isolation amplification, the differential amplification filter circuit is connected in parallel with a 1nF capacitor to give consideration to both signal filtering stability and capacitor charging rapidity, and the ADC conversion chip whose resolution is 16bit and capable of parallel acquisition is selected. And multi-channel high-precision and rapid parallel analog-to-digital conversion is realized.

The embodiment of the present application provides a grating encoder and an encoding method, and relates to the technical field of integrated optical devices. The grating encoder comprises an optical signal input end, a mode regulation area and an optical signal output end, the mode regulation area comprises a substrate, at least two straight waveguides and at least one subwavelength grating waveguide; the at least two straight waveguides and the at least one subwavelength grating waveguide are alternately and equally spaced arranged on the substrate; the duty cycle of one subwavelength grating waveguide in the unit where the subwavelength grating waveguide is located is 0.5, and the unit is composed of the subwavelength grating waveguide, the straight waveguide alternately arranged with the subwavelength grating waveguide and the interval between the subwavelength grating waveguide and the straight waveguide; one subwavelength grating waveguide and one straight waveguide alternately arranged with the subwavelength grating waveguide jointly constitute one unit cell, and each individual unit cell contains one normalized flux. The signal strength attenuation and mode distortion are reduced.

There is presented a method for altering a nonclassical state of EM radiation. A first matter particle is held within a first trap. A second matter particles is held within a second trap. The first and second traps being spatially separated. A nonclassical state of EM radiation is input to the plurality of matter particles with a first photon number distribution. The photon number distribution of the input nonclassical state of EM radiation is altered by interacting the input nonclassical state of EM radiation with the plurality of matter particles. The first matter particle is excited to a Rydberg state using a photon from the input nonclassical state of EM radiation. This excitation prevents an excitation, to a Rydberg state, of the second matter particle. The resulting altered nonclassical state comprises a second photon number distribution different to the first photon number distribution.

The utility model discloses an analog voltage isolation circuit, which belongs to the field of analog voltage isolation and comprises a first isolation unit and a second isolation unit, the first isolation unit and the second isolation unit are sequentially connected to the front end of a micro control unit (MCU), and a primary filter circuit is arranged between the first isolation unit and a voltage input end. An operational amplifier U3A is arranged between the second isolation unit and the micro-control unit MCU, a secondary filter circuit is arranged between the second isolation unit and the operational amplifier U3A, and the operational amplifier U3A is provided with a voltage output end connected with the micro-control unit MCU. The first isolation unit and the second isolation unit are arranged at the front end of the micro-control unit MCU, and the first-stage filter circuit, the second-stage filter circuit and the operational amplifier U3A are combined, so that the isolation degree and the anti-interference capability of analog voltage signals are remarkably improved, and it is ensured that signal transmission from the voltage input end to the micro-control unit is stable and safe.

In an optical computing device in which a plurality of microcells provided in a matrix form are disposed so as to be stacked on each other, reduced are variations which occur in cell size and position due to dehydration and shrinkage. An optical computing device (10) includes a plurality of light diffraction layers (L1, L2, L3) stacked on each other. In the optical computing device (10), each light diffraction layer (L1, L2, L3) includes a plurality of microcells (Cijk) which have refractive indexes set individually and which are provided in a matrix form. The plurality of light diffraction layers (L1, L2, L3) are contained in a dried gel (11).

The invention provides a reconfigurable vector multiplication structure based on micro-ring resonators and VO2 and an implementation method. Structures and method examples disclosed herein include, based on a microring resonator structure, an optical switch VO2 and a phase change material GST, a function of implementing vector multiplication and reconfigurability.

A device, method, and hybrid computing architecture for a Symbolic Photonic Logic Gate (SPLG) system that performs data processing primarily in the optical domain. The system comprises a photonic substrate, including silicon-photonics, indium phosphide, or similar optically active materials, patterned with optical waveguides and interferometric structures configured to implement logic operations through controlled optical interference, phase modulation, or non-linear optical effects. The SPLG system is configured to execute Boolean and symbolic logic functions without requiring intermediate optical-to-electrical signal conversion. In operation, information is encoded into one or more optical parameters including phase, polarization, wavelength, or amplitude, and processed within a Symbolic Optical Core optimized for linear algebraic operations such as matrix multiplication and vector transformation. The architecture further comprises an electronic control layer configured to initialize, configure, and monitor the photonic logic elements while allowing the majority of computational operations to occur within the optical domain, thereby reducing electrical interconnect congestion and resistive heating relative to fully electronic processors.

This invention relates to a photonic chip implemented through the combination and interconnection of identically oriented programmable photonic processing blocks, all of which are parallel along their longitudinal axes, implemented on a single photonic chip capable of implementing one or more simultaneous photonic circuits with optical feedback paths and / or linear multiport switching through appropriate programming of its resources and selection of its input and output ports. The invention also relates to a parallel field-programmable photonic array (P-FPPA) comprising at least one programmable circuit block based on an identically oriented / parallel adjustable beamsplitter with independent coupling and phase-shift configurations and a peripheral high-performance architecture.

An optical logic device and a logic implementation method therefor. The optical logic device comprises: a first straight waveguide (20), a second straight waveguide (21), two ring waveguides (3), two phase change functional units (4), four electrodes (5) and an optical detection device. The two ring waveguides (3) are spaced between the first straight waveguide (20) and the second straight waveguide (21); the two phase change functional units (4) respectively cover upper surfaces of the two ring waveguides (3); and two ends of each phase change functional unit (4) are each connected to one electrode (5). The first straight waveguide (20) comprises a first input end (a) and a first output end (b), and the second straight waveguide (21) comprises a second output end (c), wherein the first output end (b) and the first input end (a) are arranged on different sides, the second output end (c) and the first input end (a) are arranged on the same side, the first input end (a) is used for inputting an optical signal, the optical signal is a signal that does not change the state of the phase change functional unit (4), and the state of the phase change functional unit (4) comprises a crystalline state and an amorphous state. Each ring waveguide (3) comprises a second input end, wherein the second input end is composed of electrodes (5) at two ends of a phase change functional unit (4), the ring waveguide (3) is used for coupling an optical signal in the first straight waveguide (20) to the ring waveguide (3) and coupling an optical signal in the ring waveguide (3) to the second straight waveguide (21), the second input end is used for inputting an electrical signal, and the electrical signal is a signal that can change the state of the phase change functional unit (4). The optical detection device is connected to both the first output end (b) and the second output end (c), and is used for monitoring the transmittance of the optical signal outputted by the first output end (b) and the second output end (c) when the phase change functional unit (4) is in different states. The optical logic device has the characteristics of a compact structure, simple operation and a large on-off ratio, thereby improving the computational speed and capability of optical logic operations.

Provided is a device with improved reliability of coupling between a waveguide and an optical fiber. A device includes: a waveguide chip that includes a clad layer and an optical waveguide formed on the clad layer; and an optical fiber optically coupled to the optical waveguide, in which the clad layer has a hollow below a coupling region where the optical waveguide is optically coupled to the optical fiber, and the optical waveguide contacts the optical fiber in the coupling region, and deflects in a lamination direction of the waveguide chip inside the hollow.

The invention discloses a metasurface device design method based on logic optical operation and an imaging device, and the method comprises the steps: receiving input initial parameter information, and setting a grating period corresponding to the initial parameter information according to a preset period setting rule; overlapping the grating period according to a preset grating overlapping function and the initial parameter information to obtain corresponding amplitude distribution information; performing matching mapping on the amplitude distribution information according to a preset transmittance distribution table to obtain size arrangement information of the microstructure; and setting the overall structure size according to the size information and the size arrangement information in the initial parameter information to obtain corresponding metasurface device design information. According to the method, the metasurface device design information is obtained, the metasurface device is obtained through design, the designed metasurface device is applied to the imaging device, optical logic operation is carried out on the incident image, the imaging image is accurately obtained, and the efficiency of carrying out optical logic operation on the image is greatly improved.

The application aims to provide a kind of micro-ring resonator-based activation function device manufacturing method, comprising the following steps: determining the standard nonlinear function to be fitted by optical device;Preparation of micro-ring resonator;Coupling ring PN junction and micro-ring;Set up auxiliary light source and output signal measurement equipment;Set up TIA transimpedance amplifier and bias unit.The application can realize the function of activation function by optical device, and it is relatively easy to combine with other optical elements that can realize the summation of neural unit weight, realize the complete function of single neuron, thereby improve the operation efficiency and operation accuracy of optical neural network.The device is small in size and easy to integrate, and the operation efficiency and operation accuracy of the optical neural network integrated by the neural unit integrated by the device can be significantly improved.