339 results about "Microwave photonic" patented technology

The invention discloses a multi-modulation-format vector signal modulator based on microwave photonics, and relates to the field of microwave photonics. Comprising an IQ quadrature modulation module, a continuous wave laser, a first power optical splitter, an optical carrier frequency generation module, a polarization beam combiner, an optical amplifier, a polarization beam splitter and a photoelectric balance detector module, the IQ quadrature modulation module comprises a double-parallel Mach-Zehnder modulator, a first forming filter, a second forming filter, a first attenuator, a second attenuator, a first direct current voltage stabilization source and a second direct current voltage stabilization source. According to the invention, the formed and filtered IQ baseband signal is input into the double-parallel Mach-Zehnder modulator for quadrature modulation, the IQ baseband signal and the other path of optical carrier signal subjected to differential MZM frequency multiplication are subjected to polarization beam combination, and then the signal is converted into a radio frequency signal through PD, so that the generation of a high-frequency-band and multi-modulation-format vector signal is realized, and the high-frequency-band multi-modulation-format vector signal is suitable for the fields of high-speed communication, photon radar and the like.

The invention discloses a photon device and method for simultaneously measuring Doppler frequency shift and an angle of arrival, and belongs to the technical field of microwave photon-assisted radars. The device is configured to enable a transmitting signal and a reference signal to enter a first dual-parallel Mach-Zehnder modulator working in a carrier suppression single sideband modulation mode after being combined so as to generate two positive first-order sideband signals, and then the two positive first-order sideband signals enter a second dual-parallel Mach-Zehnder modulator and are modulated by an echo signal; and a modulation signal output from the second dual-parallel Mach-Zehnder modulator enters a photoelectric detector for photoelectric conversion to generate a down-conversion signal. Comparing the frequency of the down-conversion signal with the frequency of the reference signal by using an electric spectrum analyzer to obtain the magnitude and direction of Doppler frequency shift; the arrival angle of the target can be obtained by monitoring the power of the frequency conversion signal. Measurement of Doppler frequency shift and the angle of arrival can be completed only by using the photoelectric detector with the bandwidth lower than the frequency of the transmitted signal, and the requirement for the bandwidth of the photoelectric detector is lowered.

The invention relates to the field of radar detection methods, and discloses a microwave photon multiband radar detection method, which comprises the following steps: generating detection signals of multiple bands based on a microwave photon method, transmitting the detection signals to a target, and then carrying out dechirp processing and digital signal processing on target reflection signals to obtain a target detection result. The method specifically comprises the following steps: generating a fundamental frequency signal through a user-defined bit sequence generator, a pulse generator and an electric frequency modulator, adjusting the central wavelength and bandwidth of a signal waveform by the electric frequency modulator, amplifying the power of the fundamental frequency signal by a certain multiple through an electric power amplifier, and modulating by a distributed feedback semiconductor laser, a plurality of sidebands with equivalent power are generated by the spectrum of the optical fiber, a modulated fundamental frequency signal is input into the photoelectric detector through the optical fiber, and then the modulated fundamental frequency signal is amplified by the electric low noise amplifier to generate a multi-band frequency modulation signal. And the multifunctional detection capability of the radar system can be realized.

The invention discloses an electromagnetic signal processing-oriented microwave photon neuron convolution acceleration device, which relates to the technical field of signal processing, and comprises a microwave photon neuron convolution accelerator, an electromagnetic signal processing main control unit, a signal processing main control unit and a signal processing main control unit, the matrix multiplication and addition linear operation unit is used for completing matrix multiplication and addition linear operation of a received electromagnetic signal or processing data and a preset weight vector on an optical simulation domain, and outputting a matrix multiplication and addition linear operation result to the electromagnetic signal processing main control unit; the electromagnetic signal processing main control unit is used for inputting a pre-obtained electromagnetic signal in a vector format to the microwave photon neuron convolution accelerator, processing the received matrix multiplication and addition linear operation result to obtain processed data in the vector format, and outputting the processed data in the vector format to the microwave photon neuron convolution accelerator; and outputting the processed data to the microwave photon neuron convolution accelerator when the preset condition is not met. According to the invention, rapid processing and identification of the broadband electromagnetic signal can be realized, the calculation energy consumption demand is reduced, and the calculation power demand and the energy efficiency ratio demand of an electronic device are reduced.

The invention discloses a DP-MZM-based reconfigurable mixer with phase shift and image rejection functions, and belongs to the field of microwave photon signal processing. By adjusting an input radio frequency signal and a direct current bias voltage of the DP-MZM1, four different LO frequency doubling and mixing functions can be realized. By controlling the angle alpha between the polarization direction of the polarization analyzer and one axis of the modulator, the phase of the generated signal can be flexibly tuned in the range of 0-360 degrees. When combined with the optical frequency comb, the multi-channel multi-band frequency conversion system can be expanded into a multi-channel multi-band frequency conversion system with independent phase tuning capability by utilizing the channel switching and frequency slot selection functions of the wavelength selection switch, and parallel output of various frequency mixing results can be realized. By adjusting the phase difference between the two-channel output signals, I / Q mixing, double-balanced mixing and image rejection mixing can be configured. The scheme is not influenced by direct current bias drift, the system complexity is reduced, and the frequency conversion efficiency is improved.

The invention discloses a software-defined multi-system satellite communication load system which comprises a satellite-borne routing unit, a microwave photon frequency conversion switching unit, a comprehensive antenna microwave antenna, a comprehensive ground microwave antenna, a high-performance computing power unit, a low-speed AD / DA conversion unit, a high-speed waveform processing unit and a laser / W-frequency-band microwave common-aperture inter-satellite satellite-ground terminal. According to the invention, on-demand expansion of load capacity and miniaturization of a load system are realized, and the system integration degree is improved.

The invention belongs to the technical field of microwave photon links, and particularly relates to a high-resolution microwave photon frequency measurement system based on real-time Fourier transform. The link comprises a mode-locked laser, a first dispersion compensation module, a second dispersion compensation module, a dual-drive Mach-Zehnder modulator, a Mach-Zehnder modulator, a dispersion optical fiber, a time lens, an erbium-doped optical fiber amplifier, a photoelectric detector and an oscilloscope; the mode-locked laser outputs femtosecond Gaussian light pulses, and the femtosecond Gaussian light pulses are injected into the first dispersion compensation module and then stretched into chirp light pulses; modulating the chirp light pulse through electro-optical modulators which are connected in parallel; the modulated optical signal is subjected to time amplification processing through a dispersion optical fiber, a time lens, a second dispersion compensation module and an erbium-doped optical fiber amplifier in sequence; and the optical signal after time amplification processing is converted into a microwave pulse carrying frequency information of the signal to be detected by a photoelectric detector, and the microwave pulse is observed by an oscilloscope.

The invention discloses a distributed MIMO (Multiple Input Multiple Output) integrated system and method based on a reconfigurable notch chaotic optoelectronic oscillator, belongs to the field of microwave photons, and solves the problems of spectrum resource conflict, difficulty in multi-node synchronization, discrete inductance functions and the like. According to the system, a plurality of independent chaotic OEOs are combined with an optical frequency comb to drive an FIR filtering effect, MIMO chaotic signals with reconfigurable notch frequency points and quantity are generated, and dynamic allocation of spectrum resources is realized. The notch frequency band is used as a communication channel embedded modulation signal, and supports multi-spectrum sharing with 2.4 G, 5G, Wi-Fi and the like; a non-notch frequency band is reserved as a radar signal, and the range resolution is improved by using the broadband characteristic of the chaotic waveform. The star topology optical network expands the coverage area of a distributed system, and a centralized processing architecture reduces the complexity of multi-node collaboration. The invention provides an integrated solution of high-precision environment perception and high-reliability communication for smart cities, Internet of Vehicles and the like, and is suitable for dense urban areas with resource shortage and dynamic multi-service environments.

The invention discloses a microwave photon radar strong maneuvering target identification method based on small sample incremental learning, and belongs to the field of microwave photon radar maneuvering target identification. Time-frequency dynamic, polarization space and geometric topological features are extracted through a deep learning model, and multi-dimensional joint characterization is realized in combination with a cross-domain attention mechanism; designing a polarization-time frequency adversarial generative network, generating synthetic data conforming to an electromagnetic scattering rule under the physical constraint of a Maxwell equation, and constructing a prototype feature support set through meta learning; a dynamic knowledge distillation framework is introduced, physical consistency loss is utilized to align motion parameters and classification probability distribution of the teacher model and the student model, and lightweight increment updating is realized in combination with gradient importance masks. According to the method, the recognition precision and real-time performance of the strong maneuvering target in a complex electromagnetic environment are remarkably improved, and the method is suitable for high and overspeed maneuvering target recognition.

The invention discloses a modulation identification method based on microwave photon frequency-time mapping. The method comprises the following steps: firstly, performing microwave photon frequency-time mapping on a to-be-measured microwave signal, and mapping frequency information of the to-be-measured microwave signal to a time domain to obtain a time-frequency characteristic of the to-be-measured microwave signal; and inputting the time-frequency characteristics of the to-be-detected microwave signal into a pre-trained neural network model so as to identify the modulation form of the to-be-detected microwave signal. The invention also discloses a modulation identification device based on microwave photon frequency-time mapping. Compared with the prior art, on the basis of a microwave photon frequency-time mapping model, Fourier transform is directly completed through an optical device, a radio frequency signal is modulated to be processed in an optical domain, time delay characteristics of dispersion broadening and compression are combined, the picosecond-level time stretching precision is achieved, the instantaneous bandwidth limitation of a traditional spectrum analyzer is broken through, and the spectrum analysis precision is improved. Frequency spectrum processing of large-bandwidth signals can be completed in real time, computing resources are saved, and the real-time performance of modulation identification is improved.

The invention discloses a device and method for simultaneously measuring the two-dimensional angle of arrival and Doppler frequency shift of microwave photons, and belongs to the technical field of optical communication and microwaves, and the device is characterized in that an output port of a laser is connected with an optical input port of a PDM-DPMZM, and an optical output port of the PDM-DPMZM is connected with a common input end of an optical beam splitter; a first output port of the optical beam splitter is connected with a common input port of a first polarization beam splitter PBS1, and two output ports of the PBS1 are respectively connected with two optical input ports of a first balance photoelectric detector BPD1; an output port II of the light beam splitter is connected with a common input port of a polarization beam splitter II PBS2; and two output ports of the PBS2 are respectively connected with two light input ports of a balance photoelectric detector I BPD2. The device is simple in structure, and can solve the problem of low positioning precision in an existing simultaneous arrival angle and DFS measurement scheme.

The invention discloses a dual-wavelength mode-locked laser generating device and a dual-wavelength mode-locked laser generating method, and belongs to the technical field of optical communication, and the dual-wavelength mode-locked laser generating device comprises a pumping source, an optical integration module, a gain optical fiber, a saturable absorber and a dual-wavelength pulse independent polarization mode linear coupling regulation and control structure, linear coupling strength of cross-polarization components in two wavelength pulses is independently regulated and controlled by using a structure of a polarization controller and a polarization maintaining optical fiber, and dual-wavelength mode-locked pulse laser of different types of pulse combinations can be obtained. The coherent pulse light source with unique spectral characteristics can provide a low-cost light source for the fields of high repetition frequency optical combs, all-fiber architecture high repetition frequency soliton sequences and microwave photonics.

The invention relates to the technical field of microwave photonics, and discloses a full-band noise microwave source system and a microwave signal generation method. An optical reference unit is used for generating an optical reference signal; the photoelectric phase detection unit is connected with the optical reference unit and is used for receiving the optical reference signal and a feedback signal sent by the microwave oscillation unit and outputting a beat frequency electric signal for reflecting a phase error; the servo control unit is connected with the photoelectric phase detection unit and the microwave oscillation unit and is used for separating the beat frequency electric signal into a low-frequency control signal and a high-frequency control signal; the microwave oscillation unit is connected with the servo control unit and outputs a target microwave signal in response to the low-frequency control signal and the high-frequency control signal. A beat frequency electric signal is separated into a low-frequency path and a high-frequency path by using the servo control unit, so that targeted suppression of phase noise of different frequency bands in a single signal source is realized.

The invention discloses a microwave photon channelization receiving device and method based on a photoelectric oscillation loop structure. The device comprises an optical signal generation unit, a photoelectric modulation unit, an optical filtering unit, a photoelectric branching unit and a signal receiving unit. The optical signal generation unit is connected with the photoelectric unit; the photoelectric unit is connected with the optical filtering unit; the output end of the optical filtering unit is connected with the input end of the photoelectric branching unit, and the signal receiving unit is connected with the output end of the photoelectric branching unit. According to the invention, the sensitivity of the microwave photon channelized receiver can be effectively improved.

An on-chip integrated microwave photonic phase-coded signal generation system relates to the field of microwave photonic technology. The system includes a laser, a power splitter, a radio frequency (RF) switch, a 90° hybrid coupler (HC), a dual-parallel dual-polarization Mach-Zehnder modulator (DP-DPMZM), a polarization-dependent cascaded phase modulator (PDC-PM), a polarization beam splitter, an erbium-doped fiber amplifier, and a photodetector. In this method, the local oscillator (LO) signal is split into two parts by a power splitter. One part is input into the X-DPMZM to obtain the carrier suppression +1st order sideband of the LO signal. The other part is controlled by an RF switch. When the RF switch is off, the Y-DPMZM only outputs an optical carrier; when the RF switch is on, the Y-DPMZM outputs the -1st order sideband of the LO signal. Then, two orthogonally polarized signals are input into the PDC-PM, which is driven by two independent coding signals. When the amplitude and mode of the coding signals are changed, a binary or quaternary phase-coded signal with a carrier frequency equal to or twice that of the LO signal can be obtained through a photodetector.

The invention discloses a microwave photon beam forming network architecture based on a switch switching type optical adjustable true delay line and a phased array radar system thereof. According to the framework, microwave signals are modulated in an optical domain, and the characteristics of a plurality of adjustable delay paths in a single-channel switch switching type delay line are utilized, so that delay difference adjustment of multiple paths of optical signals is realized, the number of delay lines and delay units is greatly reduced, and meanwhile, high-precision and broadband beam-strabismus-free beam forming is supported; through two-stage or multi-stage delay configuration, the network can flexibly meet the broadband delay compensation requirements of different array antenna units, has low complexity and strong dynamic reconfigurable capability, is suitable for realization of a large-scale photonic integrated chip, reduces the number of delay lines by about 50%, does not generate frequency dispersion, and is suitable for large-scale photonic integrated chips. The system complexity, the cost and the power consumption can be remarkably reduced, and the method is particularly suitable for broadband phased array systems of millimeter waves, satellite communication, radar detection and the like.

The invention provides a broadband tunable microwave photon phase shifting device, and relates to the field of microwave photons, and the device comprises a power divider which is used for dividing an input radio frequency signal into a first radio frequency signal and a second radio frequency signal; the optical transmitting module is used for generating a first optical carrier signal and a second optical carrier signal; the reference signal module is used for performing power adjustment and phase shift on the second radio frequency signal to obtain a reference radio frequency signal, and modulating the reference radio frequency signal to the second optical carrier signal to obtain a reference optical signal; the delay signal module is used for modulating the first radio frequency signal onto the first optical carrier signal to obtain an optical modulation signal, and delaying the optical modulation signal to obtain a delayed optical signal; the delay optical signal and the reference optical signal are interfered in the beam combiner to obtain a synthesized optical signal; the true delay module is used for tuning the phase of the synthetic optical signal to obtain a delay synthetic optical signal; and the photoelectric conversion module is used for converting the delay synthesis optical signal into an output radio frequency signal.

The invention discloses a multi-frequency-band signal fusion microwave photon radar system and an implementation method thereof, and relates to the technical field of optical signal processing, and the system comprises a multi-frequency-band signal transmitting module which is used for generating a multi-frequency-band bandwidth radar signal; the m microwave photon dechirp receiving modules are used for receiving echo signals of three or more multi-band bandwidth radar signals in an optical domain; the multi-frequency-band signal fusion processing module is used for carrying out interpolation and filling of spectrum gaps on missing frequency bands among multiple frequency bands through a coherent fusion technology so as to realize fusion splicing of multi-frequency-band signals; m is the number of multi-band channels; according to the method, the broadband characteristic of the photon technology can be fully utilized, and the distance resolution of target detection is effectively improved under the condition that the bandwidth requirement of the radar waveform electrical generator is not increased through fusion processing of multi-band bandwidth radar signals.

The invention provides a terahertz generation chip based on a thin film lithium niobate platform and a preparation method of the terahertz generation chip, and belongs to the field of integrated optics and microwave photons. According to the chip, terahertz waves are generated by utilizing a second-order nonlinear difference frequency effect on thin-film lithium niobate, and phase matching of an optical field and a terahertz field is realized through parameter design of an optical waveguide structure of the lithium niobate layer and a terahertz waveguide structure of the silicon layer. The device comprises a nonlinear action layer, an isolation layer, a terahertz transmission layer and a substrate layer. Firstly, a silicon layer is thinned through a mechanical polishing process, then polytetrafluoroethylene is bonded to the bottom of the thinned silicon layer, finally, waveguide structure etching is carried out, a specific waveguide shape and size are constructed, and efficient generation and transmission of terahertz waves are achieved. The method has strong practical operability, and has wide application prospects in the fields of terahertz communication, spectroscopy, remote sensing and the like.

The invention discloses a non-coplanar traveling wave electrode electro-optical modulator, and relates to the technical field of microwave photonic devices and photoelectric measurement. A non-coplanar patch antenna and a thin-film lithium niobate optical waveguide structure are constructed into one device, and the patch antenna is directly used as a traveling wave electrode of the modulator; and direct conversion between a free space terahertz signal and an optical signal in the waveguide can be realized. Meanwhile, due to the introduction of the non-coplanar traveling wave electrode structure, the electric field component of the terahertz wave in the vertical direction of the electro-optical crystal can be enhanced, the electro-optical conversion efficiency of the device is effectively improved, the working bandwidth of the device is enhanced, and the space phase modulation problem of the terahertz wave can be effectively solved. The electro-optical sampling system based on the non-coplanar traveling wave electrode electro-optical modulator has the advantages of being wide in frequency band, high in anti-interference capacity and the like, efficient detection of terahertz waves can be achieved, and the technical advantages are obvious.

A high-speed switching N-bit path selection type silicon-based integrated microwave photon delay line comprises a wavelength tunable external cavity laser, an electro-optical modulator, an N-bit wavelength selection delay line and a photoelectric detector, and the wavelength selection delay line is composed of N + 1 2 * 2 wavelength interleavers and N groups of delay and reference waveguide pairs. After being modulated by a microwave signal, light output by the external cavity laser is input into the N-bit wavelength selection delay line and finally converted into a microwave signal through the photoelectric detector to be output. By switching the wavelength of the laser, high-speed switching of a delay light path can be realized, and then high-speed phase shifting of a microwave signal is realized. According to the scheme, the wavelength selection type delay line adopts a passive device design, and compared with a traditional optical switch type delay line, the wavelength selection type delay line is easy to realize low loss, does not need voltage regulation and control, and is low in overall system power consumption.

The present invention discloses a quartz substrate lithium niobate mode spot converter, which relates to the fields of optical communication and microwave photonics. The present invention includes a quartz substrate layer, a silica cladding layer, a lithium niobate waveguide layer, an oxide interlayer and an oxide upper cladding layer. The lithium niobate waveguide layer is a three-layer stepped structure, and the cross-sections of the fiber coupling ends of the three-layer lithium niobate waveguide layers are all isosceles trapezoids. The cross-sections of the fiber coupling ends of the oxide interlayer and the oxide upper cladding layer are both provided with notches at the lower part and isosceles trapezoidal protrusions at the upper part, and the oblique side angles of the isosceles trapezoidal protrusions of the oxide interlayer and the oxide upper cladding layer and the isosceles trapezoidal cross-sections of the lithium niobate waveguide layer do not exceed 70°. The present invention can achieve high coupling and low transmission loss when optical signals are coupled between an integrated lithium niobate photonic chip and an optical fiber, and reduces the process processing difficulty, and has high practicability.

The present invention discloses a method for detecting a laser and radio frequency composite radar. The present invention combines microwave photon radar technology with lidar, generates a linear frequency modulation optical signal with a large time-bandwidth product as the lidar detection optical signal by using a cyclic frequency shift method, and multiplexes the echo signal of the lidar and the electrical signal converted by the beat frequency of the reference optical signal as the transmission signal of the radio frequency antenna, so as to ingeniously apply the lidar and the radio frequency radar in the same system, making use of their respective advantages to offset their respective disadvantages, enabling the radar system to have the characteristics of a long detection distance, a wide range, and all-weather operation, while also having the advantages of high range resolution and high velocity resolution; at the same time, the system structure is simplified, the use of devices is saved, and the requirement of the system for signal power is reduced. The present invention also discloses a device for detecting a laser and radio frequency composite radar. Compared with the prior art, the present invention combines the advantages of microwave photon radar and lidar, and has a simple system structure and a low implementation cost.

The invention discloses an optimal linear point searching method for a silicon-based Mach-Zehnder modulator. According to the method, the linearity of a corresponding working point is estimated according to the power of a fundamental component and a third-order intermodulation component of an output signal of the modulator, and the optimal linear point of the modulator can be obtained based on the maximum estimated value of the linearity. According to the method, a maximum entropy spectral subtraction method is adopted to reduce a signal noise floor, and a violent search method is adopted to retrieve an optimal combination of a modulator upper and lower arm phase difference and a reverse bias voltage to obtain an optimal working point. Compared with a conventional linearity test method that the linearity is obtained by testing when the working point of the modulator is set to be an orthogonal point, the optimal linear point searched by the method can obviously improve the linearity of the modulator, and a high-linearity silicon-based integrated microwave photon system can be realized.

The invention provides a broadband linear frequency modulation microwave source based on ultra-short external cavity modulation light feedback, and relates to the field of microwave photonics. Continuous light generated by the main semiconductor laser is injected into the slave laser after being adjusted, so that the slave laser works in a periodic oscillation state; the slave laser, the electro-absorption modulator and the reflector are integrated to form an ultra-short outer cavity, and the intensity of feedback light is regulated and controlled by an external signal source so as to realize linear scanning of cavity mode frequency. After beam splitting of light output from the laser, one path forms a long external cavity feedback stable signal through the adjustable optical fiber delay line, and the other path outputs a target signal after beat frequency of the photoelectric detector and filtering of the band-pass filter. A high-speed modulator and a high-frequency microwave source are not needed, the broadband advantage of a photonics scheme is reserved, the frequency sweeping bandwidth is further improved to 60 GHz or above, the center frequency and the frequency sweeping range are independently adjustable, the structure is simple, cost is low, integration is easy, and the device is suitable for scenes such as photoelectric radars.

The invention belongs to the technical field of microwave photons and optical communication, particularly relates to a tunable narrow-linewidth microwave photonic oscillator based on forward Brillouin scattering, and solves the technical problems that an existing microwave photon generation method is complex in structure and poor in tunability, and linewidth cannot meet requirements. The erbium-doped optical fiber amplifier is connected to a first optical fiber coupler through a filter, two output ends of the first optical fiber coupler are respectively connected to a third optical fiber coupler and a second optical fiber coupler, and two output ends of the second optical fiber coupler are respectively connected to a spectrograph and are sequentially connected with a photoelectric detector and a spectrum analyzer; two output ends of the third optical fiber coupler are respectively connected to an input end c of a fourth optical fiber coupler through a first polarization controller and a first single-mode optical fiber and connected to an input end b of the fourth optical fiber coupler through a second polarization controller and a second single-mode optical fiber in sequence; and the fourth optical fiber coupler is connected to an erbium-doped optical fiber amplifier through a third polarization controller.

The invention discloses a multi-band reconfigurable broadband waveform generation device based on microwave photons, belongs to the technical field of microwave photons, and solves the problems of narrow high-frequency working bandwidth and poor noise characteristic when bandwidth linear frequency modulation radar signals are generated in the prior art. By adjusting the bandwidth of the radio frequency baseband signal, the cyclic frequency shift times of the multiple optical channels and the comb tooth interval between the two optical frequency combs, the functions that the waveform frequency band of the broadband waveform is adjustable, and the frequency modulation slope and amplitude of the linear frequency modulation signal are adjustable are achieved. The multi-channel optical channel can support generation and gating of a plurality of signals with different frequency bands at the same time, each signal has independent signal reconstruction, regulation and control capabilities, the capability of adapting to different requirements of electronic information systems such as different radars for broadband waveforms is achieved, and the reconfigurable performance is high.

The present invention discloses a microwave photonic neuron convolution acceleration device for electromagnetic signal processing, which relates to the technical field of signal processing and includes: a microwave photonic neuron convolution accelerator connected to the electromagnetic signal processing main control unit, configured to perform matrix multiplication and addition linear operations on the received electromagnetic signals or processed data and a preset weight vector in the optical analog domain, and output the matrix multiplication and addition linear operation results to the electromagnetic signal processing main control unit; an electromagnetic signal processing main control unit, configured to input the pre-obtained electromagnetic signals in vector format to the microwave photonic neuron convolution accelerator, and configured to process the received matrix multiplication and addition linear operation results to obtain processed data in vector format, and output the processed data to the microwave photonic neuron convolution accelerator when a preset condition is not met. The present invention can achieve fast processing and recognition of broadband electromagnetic signals, reduce the computational energy consumption requirements, and reduce the computing power requirements and energy efficiency ratio requirements for electronic devices.

The application belongs to the technical field of optical communication and relates to a frequency-shift-free microwave photonic channelized receiving device, which comprises a carrier light frequency comb generating unit, a local light frequency comb generating unit, an electro-optical modulation unit, an optical phase shift unit, a channel selection and spectrum processing unit and a plurality of photoelectric conversion units. The received broadband radio frequency signal is modulated on each comb tooth of the carrier light frequency comb through the electro-optical modulation unit, and the frequency alignment between the optical local oscillator and the required receiving sub-channel can be realized based on the "vernier" effect caused by the different free spectral ranges of the carrier light frequency comb and the local light frequency comb and the inherent frequency alignment of the same pump laser. The mirror image sub-channel suppression is realized based on the opposite optical phase shifts on both sides of the pump light. The application has a simple structure, omits the frequency shift and special modulation structure required for frequency alignment, effectively suppresses the inter-channel crosstalk problem in the channelized receiving process, and can flexibly increase the channelization quantity according to actual needs.

The technology described herein is directed towards a cryogenic magnet-less circulator device, in which the circulator device is based on the spatiotemporal modulation of angular momentum for microwave photons, controlled using a modulated control signal. The circulator device is configured for integration with a quantum computer, e.g., to facilitate qubit measurements. The circulator topology and design are based on tank circuits, e.g., arranged in a star topology with different sets of radio frequency superconducting quantum interference devices (rf-SQUIDS) per tank circuit, that resonate out-of-phase based on the modulated control signal. A single control line can be used to operate the circulator. The circulator can be fabricated using standard semiconductor processes, allowing one or more circulators to be integrated on the same superconducting chip as the qubits. A classical computer can be used to output the modulated control signal, and adapt the modulated control signal as needed under varying conditions.