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59 results about "Arbitrary waveform generator" patented technology

An arbitrary waveform generator (AWG) is a piece of electronic test equipment used to generate electrical waveforms. These waveforms can be either repetitive or single-shot (once only) in which case some kind of triggering source is required (internal or external). The resulting waveforms can be injected into a device under test and analyzed as they progress through it, confirming the proper operation of the device or pinpointing a fault in it.

Method and device for scanning voltage and current flip points of chip

The invention relates to the technical field of integrated circuit testing, and discloses a method and equipment for scanning a voltage and current flip point of a chip, and the method comprises the following steps: an upper computer completes parameter configuration and wave table loading and then sends a starting instruction, a global synchronization unit generates a synchronization signal, and the synchronization signal is sent to a chip; the random waveform generator is started in parallel for scanning, the trigger unit is started for monitoring, the internal counter is started for timing, when the trigger unit monitors overturning, a stop signal is sent, the global synchronization unit latches a count value immediately, and finally, the upper computer reads the count value and calculates an overturning point value in combination with a wave table rate and a clock period. According to the invention, the global synchronization unit is used for coordinating the parallel hardware architecture of the arbitrary waveform generator and the trigger unit, so that the continuous scanning of the excitation signal and the real-time monitoring of the response signal can be autonomously operated on the hardware level, and the overall time consumption of a single flip point test is greatly shortened.
Owner:NANJING MACROTEST SEMICON TECH CO LTD +1

In-situ diagnostics of microwave interconnects for quantum computers

A system comprises a digitally programmable frequency chirp generator configured to generate a frequency chirp, an attenuator coupled to the digitally programmable frequency chirp generator and a directional device integrated into a cryogenic circuit configured to control superconducting qubits and coupled to the digitally programmable frequency chirp generator. The directional device comprises a main arbitrary waveform generator and an on-chip programmable self-interference canceller.
Owner:INTERNATIONAL BUSINESS MACHINE CORPORATION

Multi-band local oscillator signal generation system and method

The invention relates to the technical field of satellite communication, and discloses a multiband local oscillator signal generation system and method, and the system comprises a laser, an optical splitter, a first optical modulator, a second optical modulator, an arbitrary waveform generator, an optical coupler, and a signal generation module. The optical splitter divides an optical carrier generated by the laser into first carrier light and second carrier light; the arbitrary waveform generator converts the digital signal into a digital baseband signal to be modulated; the first optical modulator modulates the first baseband signal to the first carrier light to obtain a first optical frequency comb; a second optical modulator modulates a second baseband signal to second carrier light to obtain a second optical frequency comb; the optical coupler couples the first optical frequency comb and the second optical frequency comb into a laser signal; the signal generation module converts the laser signal into a local oscillator millimeter wave signal. Dual-coherent optical frequency combs with different comb tooth intervals are generated through modulation of digital signals with different bit rates, tuning of local oscillation signals is achieved, and the requirement for multi-frequency local oscillation is met.
Owner:PENG CHENG LAB

Polarization adjustment device and polarization adjustment method

The invention discloses a polarization adjusting device and a polarization adjusting method. The polarization adjusting device comprises a light source assembly, a micro-ring resonant cavity, a photoelectric detector, a digital oscilloscope, an arbitrary waveform generator and a power meter module. The light source assembly comprises a light source, a scanning module and a polarization controller connected with the transmission end of the light source. The micro-ring resonant cavity comprises a first output part and a coupling part coupled with the polarization controller. The photoelectric detector is connected with the first output part. The digital oscilloscope comprises a first input part and a second input part used for receiving an electric signal output by the photoelectric detector, and the digital oscilloscope can display the trough of the Lorentz curve. The arbitrary waveform generator includes a second output portion and a third output portion. The second output part is connected with the light source. The third output part is connected with the first input part. The power meter module is connected with the scanning module. According to the polarization adjusting device and the polarization adjusting method, the light source assembly can be quickly and efficiently adjusted to be in the TE polarization state or the TM polarization state.
Owner:ZHEJIANG LAB

A nanoresonator amplitude and phase response measurement device

The application provides a response measuring device for amplitude and phase of a nanoresonator. The response measuring device comprises: an arbitrary waveform generator for generating a first waveform signal and a second waveform signal; a nanoresonator for generating a vibration signal; a first radio frequency power divider for transmitting an equalized first vibration signal to a first signal path and a second vibration signal to a second signal path; a first processing module for multiplying the first vibration signal with the first waveform signal, filtering high frequency components in a first resultant signal, and obtaining an I(t) signal; a second processing module for multiplying the second vibration signal with the second waveform signal, filtering high frequency components in a second resultant signal, and obtaining a Q(t) signal; and a signal acquisition system for determining an amplitude signal and a phase signal of the nanoresonator according to the I(t) signal and the Q(t) signal. The application can replace a vector network analyzer to obtain the amplitude signal and the phase signal of the nanoresonator.
Owner:SUZHOU UNIV

Coherent optical time domain reflection sensing device and method thereof

The invention provides a coherent optical time domain reflection sensing device and a method thereof, and relates to the technical field of distributed optical fiber acoustic wave detection. The device comprises a light source, a 1 * 2 coupler, a control and signal processing unit, an arbitrary waveform generator, a double-path parallel Mach-Zehnder electro-optical modulator, a reference arm optical fiber, an erbium-doped optical fiber amplifier, an optical filter, a circulator, a sensing optical fiber, a 90-degree optical mixer, a photoelectric detector and a data acquisition card. A detection light sequence containing positive and negative frequency shift light pulse sequences is injected into a sensing optical fiber, returned signal light which carries light phase information of each detection point and has superposed frequencies is mixed with local reference light, signal separation is achieved after the signal light is multiplied by complex factors corresponding to each frequency shift pulse and integration of a periodic integral multiple window is carried out, and the detection point light phase information is obtained. And optical phase information demodulation is carried out, and then fusion of detection results of optical signals of various frequencies is carried out, so that high-sampling-rate sensing of acoustic vibration is realized.
Owner:THE 54TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION

A frequency modulated continuous wave lidar system

The application provides a frequency-modulated continuous wave laser radar system and relates to the technical field of laser radar.The frequency-modulated continuous wave laser radar system comprises a laser, an arbitrary waveform generator, an upper computer, a collection card, a lens, a first optical beam splitter, a linearity correction unit and a detection unit.The linearity correction unit comprises a second optical beam splitter, a delay line, a first coupler and a first balanced detector.The detection unit comprises a third optical beam splitter, a coaxial transceiving grating, a second coupler and a second balanced detector.The frequency-modulated continuous wave laser radar system improves the signal-to-noise ratio and the energy efficiency of the edge field of view, uses the coaxial transceiving grating to replace the circulator, eliminates the near-distance detection blind area of the radar system caused by the internal reflection of the circulator, integrates the linearity correction unit, performs real-time correction or monitoring on the frequency modulation of the laser, enhances the stability of the radar system, and does not need to build any additional optical circuit.
Owner:JILIN UNIVERSITY

TEC controller chip test system and method

The invention provides a TEC controller chip test system and method, the system employs an integrated circuit automatic test machine ATE to test a TEC controller chip, the ATE comprises a voltage or current source, a high precision measurement unit, a power resistor and an arbitrary waveform generator, the voltage or current source is used as a power supply, the high precision measurement unit is used as a test instrument, and the power resistor is used as an arbitrary waveform generator. The power resistor is used for simulating the TEC, and the arbitrary waveform generator is used for simulating the voltage of the thermistor. According to the invention, the technical problems of high cost, low efficiency and low system reliability of the test of the TEC controller chip in the prior art can be solved.
Owner:BEIJING ZHENXING METROLOGY & TEST INST

An optical frequency comb automatic recovery device and method

The application discloses an optical frequency comb automatic recovery device and method, and belongs to the field of silicon-based nonlinear optical photoelectric modulation. The application comprises a laser, an IQ modulator, an acousto-optic modulator, a fiber amplifier, a polarization controller, a micro-ring resonator, a phase-locked loop, an arbitrary waveform generator, a photoelectric detector, a PID module and an upper computer. Transmission loss of an optical frequency comb debugging system is tested, which comprises fiber loss before laser enters a microcavity and transmission loss after the laser enters the microcavity; the output frequency range of the phase-locked loop is adjusted, and frequency scanning is performed on the microcavity; laser wavelength is entered from blue detuning, the output power of the laser is gradually reduced through the acousto-optic modulator, and the wavelength is kept unchanged; when the PID detects a power rise, the laser power is quickly raised until the PID detects a rising step; the laser frequency is slowly increased and the power is kept unchanged until a single soliton optical frequency comb is observed; when the single soliton disappears, the control steps after the laser wavelength is entered from blue detuning are repeated, and the optical frequency comb is automatically recovered.
Owner:BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA

Output amplification circuit and arbitrary waveform generator

ActiveCN121239157BComputing operations for integration/differentiationNegative-feedback-circuit arrangementsIntegratorHigh bandwidth
This application provides an output amplifier circuit and an arbitrary waveform generator, belonging to the field of electronic circuit technology. The output amplifier circuit includes: a radio frequency amplifier circuit, including a first common-emitter amplifier sub-circuit and a second common-emitter amplifier sub-circuit, for amplifying high-frequency signals in the AC input signal from the input node; the second common-emitter amplifier sub-circuit includes a second transistor, the collector of which is connected to the output node through a current-sampling resistor; an output bias voltage circuit for superimposing an output bias voltage onto the output node; a static bias voltage circuit for providing a static bias voltage to the second transistor and outputting a reference voltage to the integrator circuit; a feedback amplifier circuit for outputting a feedback signal based on the static operating current of the second transistor; and an integrator circuit for outputting an integrated signal based on the reference voltage and the feedback signal. This output amplifier circuit can solve the problems of small output bias voltage range and performance degradation in ultra-high bandwidth AWGs.
Owner:SHENZHEN CITY SIGLENT TECH

A cloud radio access network modeling method based on machine learning

ActiveCN120915384BPhase noiseFiber chromatic dispersion
This invention relates to a machine learning-based modeling method for cloud wireless access networks, comprising: acquiring a remote cloud wireless access network transmitter; improving the remote cloud wireless access network transmitter by replacing the traditional microwave source with a dual-ring opto-oscillator to suppress side modes through single-mode oscillation; and introducing a directly modulated laser after an arbitrary waveform generator to utilize the chirp effect and fiber dispersion to generate power gain; and modeling the millimeter-wave signal spectrum of the improved remote cloud wireless access network transmitter based on a lightweight gradient booster model to match the dimensions of input and output features. This invention uses a dual-ring opto-oscillator to replace the traditional microwave source, reducing phase noise; utilizes the synergistic gain behavior of the directly modulated laser chirp and fiber dispersion to improve the transmission gain of the millimeter-wave signal; and models the spectral characteristics of the millimeter-wave signal using a lightweight gradient booster model to achieve spectrum prediction.
Owner:TIANJIN UNIV

A radio frequency arbitrary waveform generator, generation method, related systems and devices

This invention discloses a radio frequency arbitrary waveform generator, generation method, related systems, and devices. The generator includes: a frequency processing unit that processes a frequency parameter sequence to obtain cumulative phase data; a phase processing unit that processes a phase parameter sequence to obtain effective phase data; an amplitude processing unit that processes an amplitude parameter sequence to obtain effective amplitude data; a local oscillator processing unit that processes a local oscillator parameter sequence to obtain a local oscillator signal; an arithmetic unit that performs calculations on the cumulative phase data and effective phase data to obtain input angle data, and obtains sine and cosine data through calculation or table lookup; an I-unit and a Q-unit that generate I-channel signals and Q-channel signals respectively based on the amplitude data and sine and cosine data; and a mixing unit that performs IQ mixing on the I-channel signals, Q-channel signals, and local oscillator signal to generate an IQ mixed transmit signal. It can generate radio frequency signals with arbitrarily controllable and adjustable spectrum, phase, and amplitude, with high control precision.
Owner:SHENZHEN SPINQ TECHNOLOGY CO LTD

Optoelectronic oscillator capable of being used for generating tunable phase coding microwave pulse

PendingCN121688502ASolid masersGratingPhase Code
The invention provides a photoelectric oscillator capable of being used for generating tunable phase coding microwave pulses. The photoelectric oscillator is composed of a tunable laser, a polarization controller, a phase modulator, a dual-drive Mach-Zehnder modulator, an optical circulator, a phase shift fiber bragg grating, a single-mode fiber, a photoelectric detector, an electric amplifier, a microwave source and an arbitrary waveform generator. The invention develops the active mode-locked photoelectric oscillator for generating the phase-coded microwave pulse signal, which is simple in structure and good in tunability. On the basis of an active mode-locked optoelectronic oscillator, a phase modulator is driven by a phase coding signal, so that the duration of each voltage polar code is kept consistent with the loop delay of the optoelectronic oscillator, and a phase-coded coherent microwave pulse sequence is generated. The signal has the advantage of large time bandwidth product, can give consideration to the detection distance and distance resolution of the radar, and has the characteristics of interference resistance, low interception and the like.
Owner:BEIHANG UNIV

Signal generation device and method, analog-digital hybrid test board, and test machine

PCT designated stageWO2026081517A1Spectral/fourier analysisElectronic circuit testingComputer hardwareHybrid testing
A signal generation device and method, an analog-digital hybrid test board, and a test machine. The signal generation device comprises: an arbitrary waveform generator, a read / write control module, an external clock chip, and a storage device; the external clock chip is configured to output a fixed-frequency sampling clock to a digital-to-analog conversion device; the read / write control module is connected to the arbitrary waveform generator and the storage device, and is configured to read an original waveform from the storage device on the basis of a received read request instruction, and return the read original waveform to the arbitrary waveform generator; and the arbitrary waveform generator is configured to perform resampling processing on the received original waveform to generate a reconstructed waveform matching the frequency of the sampling clock, wherein the reconstructed waveform is used by the digital-to-analog conversion device to perform digital-to-analog conversion on the basis of the sampling clock outputted by the external clock chip.
Owner:HANGZHOU CHANGCHUAN TECH CO LTD

Broadband atom terahertz detection method and device

The invention provides a broadband atom terahertz detection method and device, and relates to the technical field of terahertz detection and imaging, and the method comprises the steps: generating a time coding sequence through an arbitrary waveform generator, and controlling a microwave switch to carry out the orthogonal coding modulation of a terahertz field, so as to generate a terahertz differential signal carrying coding information; acting the terahertz differential signal on Rydberg atoms in an atomic gas chamber so as to convert terahertz information into transmission light intensity change of probe light, and converting the optical signal into an electric signal; and performing synchronous demodulation and acquisition on the electric signal to generate a measurement vector, and reconstructing an original terahertz time domain waveform from the measurement vector through a compressed sensing reconstruction algorithm. Through combination of superheterodyne detection and a time domain calculation imaging algorithm, the physical limitation of the bandwidth of the atom detector is broken through, and rapid and high-resolution detection of broadband terahertz signals is realized while the advantage of high sensitivity of the atom detector is maintained.
Owner:SOUTH CHINA NORMAL UNIV

Graphical user interface for configuring multi-channel functions or arbitrary waveform generator signals in electronic devices

1. Name of the product in this design: Graphical user interface for configuring signals of a multi-channel function or arbitrary waveform generator for electronic devices. 2. Purpose of this design: An electronic device. 3. The key design feature of this product is its graphical user interface. 4. The image or photograph that best illustrates the design's key features: the front view. 5. As is customary, rear view, left view, right view, top view, and bottom view are omitted. 6. Purpose of the graphical user interface: to configure the signals of each channel of the signal source and to simulate the actual waveform signal output. 7. Human-computer interaction method of graphical user interface: The main view is the main interface of the product; clicking the "CH2" button in the lower left corner of the main view will display the interface change status diagram. In the interface view, "X" represents text, numbers, or symbols that can be changed or replaced.
Owner:RIGOL TECHNOLOGIES CO LTD

AC voltage phase jitter error compensation system and method based on differential sampling

The invention provides an AC voltage phase jitter error compensation system and method based on differential sampling, and the system is characterized in that a to-be-detected AC source is connected with one side of a self-made double-pole double-throw switch; the common end of the double-pole-double-throw switch is connected with the low end of the digital-to-analog conversion board card serving as the voltage standard and the low end of the transformed sampling voltmeter. Two groups of reference signals sent by the rubidium clock are respectively connected to external reference clocks of the two groups of arbitrary waveform generators and external reference signals of the digital-to-analog conversion board card through the self-made optical isolator; the group of arbitrary waveform generators are respectively connected with an external phase-locked end of the AC signal calibration source to be tested, the transformed sampling voltmeter and a trigger signal end of the standard digital-to-analog conversion board card through three optical isolators; and the other group of arbitrary waveform generator is connected with an external reference signal end of the sampling voltmeter through a self-made optical isolator. According to the invention, measurement errors caused by phase jitter can be effectively compensated, so that the accuracy of high-frequency AC voltage magnitude transmission is improved.
Owner:BEIJING ZHENXING METROLOGY & TEST INST

Optical domain decoupled amplitude-frequency response equalization optimization method and device

This application discloses an optical domain decoupling amplitude-frequency response equalization optimization method and apparatus. First, a system-level calibration is performed on the optoelectronic link, which includes an arbitrary waveform generator, intensity modulator, photodetector, and oscilloscope, to obtain the overall frequency response of the link, including amplitude and phase frequency responses. Then, the transmitter amplitude-frequency response is obtained through optical domain scanning and normalization. The receiver amplitude-frequency response is separated from the overall amplitude-frequency response through decoupling operations. Finally, a transmit-receive domain equalization strategy is used to complete transmit signal pre-distortion compensation and receive signal de-embedding compensation, respectively. This successfully achieves a balance between testing cost, testing time, and equalization performance, realizing low-cost, high-efficiency, and high-performance frequency response decoupling and equalization compensation for IMDD high-speed optical links. It provides an efficient, economical, and high-performance solution for the research and testing of IMDD high-speed optical modules.
Owner:HONG KONG UNIV OF SCI & TECH (GUANGZHOU)

Platform and method for reverse virtual screening based on programmable quantum computing

A method for reverse virtual screening based on programmable quantum computing, characterized in that the method comprises the following steps: S1. Calculating a binding interaction graph of the given small molecule and the target protein molecule on the computer based on different pharmacophore distances for a given small molecule and a target protein molecule; S2. Encoding an adjacency matrix of the binding interaction graph into a platform for quantum-reverse virtual screening by decomposing the adjacency matrix; S3. Performing a Gaussian Bose scan over the platform for quantum-reverse virtual screening, which includes the following substeps: S31. Generating a set of single-mode vacuum compression states with different compression levels using the acousto-optic modulator to chop the pulsed laser to pump the nonlinear crystal, and sending the set of single-mode vacuum compression states into the cyclic optical path of the quantum processing unit module; S32. Performing a high-dimensional global primary state evolution operation by an electro-optic modulator in the cyclic optical path, and inputting the evolution result into the detection module, where the number of electro-optic modulators is two and the electro-optical modulator is equipped with a power amplifier for amplifying an analog signal and is controlled by a programmable arbitrary waveform generator; S33. Measuring the presence or absence of the number of photons in each mode by a single-photon superconducting detector in the detection module, and inputting the measurement result into the computer to obtain the sample result processed by the quantum algorithm; and S4. Generating all full-linkage subgraphs of the binding interaction graph according to the sampling results, and generating a full-linkage subgraph with the greatest weight by sorting all full-linkage subgraphs according to weight, thereby directly determining the optimal binding mode between the small molecule and the target protein molecule by the structure of the full-linkage subgraph with the greatest weight.
Owner:ZHEJIANG LAB

Vibration compensation effect simulation evaluation system and method based on VCO phase accumulation

ActiveCN122043617Arapid deploymentImprove development and testing efficiencyGravitational wave measurementDifferentiatorData stream
The invention relates to a vibration compensation effect simulation evaluation system and method based on VCO (Voltage Controlled Oscillator) phase accumulation, and the system comprises an arbitrary waveform generator, a simulation differentiator, a voltage-controlled oscillator, a real-time compensation module, an oscilloscope and an upper computer, the analog differentiator is connected with the voltage-controlled pins of the voltage-controlled oscillator and the analog differentiator, the analog differentiator inputs processed signals to the real-time compensation module, integral following signals output by the real-time compensation module and modulation signals output by the voltage-controlled oscillator enter the oscilloscope to be collected and recorded, and the oscilloscope is connected with the upper computer through a USB (universal serial bus). And the data stream is transmitted to an upper computer for automatic calculation processing. According to the invention, a pure electronic signal simulation scheme is adopted, a vibration signal is generated through a signal generator, and a to-be-tested compensation module and a phase accumulation reference circuit based on a VCO are input at the same time, so that a double-path parallel processing verification architecture is constructed. The system remarkably improves the development and test efficiency of the compensation system.
Owner:杭州微伽量子科技有限公司

A vibration compensation effect simulation evaluation system and method based on VCO phase accumulation

ActiveCN122043617BDifferentiatorData stream
The present application relates to a kind of vibration compensation effect simulation evaluation system and method based on VCO phase accumulation, system includes arbitrary waveform generator, analog differentiator, voltage-controlled oscillator, real-time compensation module, oscilloscope and host computer, arbitrary waveform generator generates a sine wave signal as analog speed quantity, and input voltage-controlled foot of voltage-controlled oscillator and analog differentiator, analog differentiator will signal after processing input to real-time compensation module, integral follow-up signal exported by real-time compensation module and the modulation signal output by voltage-controlled oscillator enter oscilloscope and be collected record, oscilloscope is connected with host computer by USB, data stream is transmitted to host computer and is carried out automatic calculation processing.The present application adopts pure electronic signal simulation scheme, vibration signal is generated by signal generator, while input is measured compensation module and the phase accumulation reference circuit based on VCO, constructs double-path parallel processing verification architecture.The system significantly improves the development test efficiency of compensation system.
Owner:杭州微伽量子科技有限公司

A radiation source generating device for lightning detection system positioning accuracy verification

ActiveCN224594827UPositioning accuracy verification implementationGps receiverRadio frequency
This utility model discloses a radiation source generating device for verifying the positioning accuracy of a lightning detection system, within the field of lightning detection technology. The device includes a central control unit connected to an arbitrary waveform generator, a GPS receiver, and a radio frequency processing unit, which is connected to an antenna. This enables high-precision positioning accuracy verification of the lightning detection system with adjustable three-dimensional spatial position. Furthermore, the radiation source transmitting device can simulate lightning radiation sources of corresponding frequency bands according to the requirements of different frequency band lightning detection systems. It can accurately record the precise time and spatial position of the lightning radiation source used for network accuracy verification, significantly improving verification accuracy. The device is flexible and lightweight, and can be equipped with a drone, allowing accuracy verification experiments to be conducted at any location within the detection network without involving actual lightning discharge events, thus providing excellent safety.
Owner:YANGZHOU UNIV

Arbitrary waveform generator

ActiveCN310111361SWave shapeRadio frequency
1. The name of the design product: arbitrary waveform generator. 2. The use of the design product: for generating radio frequency pulse signals of user-defined arbitrary waveforms to meet testing and control requirements. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.
Owner:SHENZHEN SPINQ TECHNOLOGY CO LTD

Chaotic laser secret communication device and method with large secret key space

The invention relates to the technical field of optical communication, and discloses a chaotic laser secret communication device and method with a large secret key space. The device comprises a common driving chaotic signal generation module, an optical isolator, a second optical splitter, a first chaotic carrier generation module, a second chaotic carrier generation module, a first photoelectric detector, a second photoelectric detector, an arbitrary waveform generator, a power divider and an oscilloscope. The two independent chaotic carrier generation modules are respectively excited by the shunted public driving signal, so that the driving signal and the chaotic carrier have low relevance, eavesdropping on a public driving link through direct filtering is effectively resisted, and the generated chaotic carrier is ensured to have high synchronism; and secondly, the two chaotic carrier generation modules serve as independent parameter-adjustable units, each chaotic carrier generation module has multi-dimensional adjustable physical parameters, and the parameters form a composite key of the system, so that the ability of the system to resist brute force attack is remarkably improved.
Owner:GUANGDONG UNIV OF TECH

Photoelectric fusion and inductance integrated system based on spread spectrum and microwave photon hiding

The invention relates to the technical field of photoelectric communication and radar sensing crossing, and discloses a photoelectric fusion and inductance integrated system based on spread spectrum and microwave photon hiding. The system comprises a signal transmitting device, wherein the signal transmitting device comprises an encoder, an m sequence generator, a first multiplier, a second multiplier, a linear frequency modulation signal generator, an arbitrary waveform generator, wide-spectrum light source equipment, an intensity modulator, a dispersion compensation optical fiber, a single-mode optical fiber, a photoelectric detector and a transmitting antenna. The intensity modulator is used for carrying out intensity modulation on the signal with the specific waveform, taking the light source subjected to polarization adjustment as a carrier light source of the signal with the specific waveform, and outputting an optical signal; the dispersion compensation optical fiber is used for performing time domain broadening on the optical signal; and the photoelectric detector is used for converting the optical signal subjected to dispersion compensation into an electric signal. By adopting the system, the concealment of the whole system can be improved, and the purpose of synchronously realizing high-speed information transmission and high-precision target perception can be achieved.
Owner:CHINESE PEOPLES LIBERATION ARMY INFORMATION SUPPORT CORPS ENGINEERING UNIVERSITY

Coherent optical communication system integrated with electro-optic frequency comb driver

PendingCN122339618ABandpass filteringQuadrature modulator
This invention belongs to the field of optical communication technology and discloses a coherent optical communication system driven by an integrated electro-optic frequency comb, comprising: a continuous wave laser (1), an electro-optic frequency comb chip (2), a radio frequency signal source (3), a radio frequency signal distribution module (4), a first fiber amplifier (5), an arbitrary waveform generator (6), a dual-polarization in-phase quadrature modulator (7), a second fiber amplifier (8), a single-mode fiber (9), a third fiber amplifier (10), a tunable bandpass filter (11), a local oscillator continuous wave laser (12), a coherent receiver (13), and an offline digital signal processing module (14); wherein, the electro-optic frequency comb chip (2) is loaded with a radio frequency signal and can perform electro-optic modulation on the continuous wave optical signal to generate a broadband, flat-top electro-optic frequency comb. By integrating an electro-optic frequency comb chip into the coherent optical communication system, this invention can significantly improve the system integration and greatly reduce the system cost.
Owner:HUAZHONG UNIV OF SCI & TECH

A broadband atomic terahertz detection method and device

ActiveCN121720968BFast sampling speedIncrease detection speedSpectrum investigationMaterial analysis by optical meansRydberg atomParticle physics
This invention provides a broadband atomic terahertz detection method and apparatus, relating to the field of terahertz detection and imaging technology. The method includes: generating a time-coded sequence using an arbitrary waveform generator; controlling a microwave switch to perform orthogonal coding modulation on a terahertz field to generate a terahertz differential signal carrying coded information; applying the terahertz differential signal to Rydberg atoms in an atomic gas cell to convert terahertz information into changes in the transmitted light intensity of the probe light, and converting the optical signal into an electrical signal; synchronously demodulating and acquiring the electrical signal to generate a measurement vector; and reconstructing the original terahertz time-domain waveform from the measurement vector using a compressed sensing reconstruction algorithm. This invention, by combining superheterodyne detection and time-domain computational imaging algorithms, overcomes the physical limitations of the bandwidth of atomic detectors, achieving rapid and high-resolution detection of broadband terahertz signals while maintaining their high sensitivity advantages.
Owner:SOUTH CHINA NORMAL UNIV

Control system for a quantum computer

Embodiments of the present disclosure relate to a control system for a quantum computer. The control system is a quantum computing control system. The control system includes a plurality of arbitrary waveform generators for controlling qubits. The control system includes at least one quantum measurement device for reading out qubit states. The control system further includes a sequencer configured to control the plurality of arbitrary waveform generators.
Owner:ROHDE & SCHWARZ GMBH & CO KG

An optical sensing system and method using multicarrier probe pulses

This invention provides an optical sensing system and method using multi-carrier probe pulses. It involves designing an intensity-modulated multi-carrier pulse sequence, using an arbitrary waveform generator to drive an acousto-optic modulator to modulate continuous light emitted from an ultra-narrow linewidth laser into pulsed optical signals with multiple subcarrier frequency components. The modulated pulse signals are then fed into the optical fiber under test. Beat frequency signals of the backscattered Rayleigh light signal and the local oscillator light signal in the optical fiber are acquired. The beat frequency signals are demodulated, and the probe data corresponding to the subcarriers are extracted and combined to obtain the sensing data, thus suppressing coherent fading. The beneficial effect of this invention is that it significantly reduces the incidence of interference fading.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

Hybrid encoding signal generation system and method based on actively mode-locked optoelectronic oscillator

The application example relates to the field of microwave photonics, in particular to a hybrid encoding signal generation system and method based on an active mode-locked optoelectronic oscillator, which comprises an active mode-locked optoelectronic oscillator, the active mode-locked optoelectronic oscillator is composed of a semiconductor continuous wave laser, a double-drive Mach-Zehnder modulator, an optical fiber, an erbium-doped fiber amplifier, an optoelectronic detector, a radio frequency amplifier, an electric band-pass filter, an electric coupler and an arbitrary waveform generator; the arbitrary waveform generator is used for generating a hybrid encoding signal to modulate an optical carrier. The scheme realizes the organic combination of spontaneous oscillation of a microwave signal and hybrid encoding modulation, and meets the needs of high frequency, high stability and high data transmission rate.
Owner:SOUTH CHINA NORMAL UNIV +1