60 results about "Quantum noise" patented technology

The invention discloses a quantum measurement and control data processing method and device, and belongs to the technical field of data processing.The quantum measurement and control data processing method and device comprises the following specific steps that firstly, wavelet packet decomposition is conducted on an original measurement signal through a quantum noise feature extraction module, and a quantum noise feature extraction module is obtained; carrying out matched filtering with a preset quantum noise fingerprint database; and 2, performing quantum state reconstruction on the filtered signal by adopting a compressed sensing algorithm, wherein a measurement matrix is dynamically generated according to the Hamiltonian of a quantum system. Through combination of wavelet packet decomposition (time-frequency locality) and a dynamic measurement matrix (Hamiltonian relevance), compared with a traditional Fourier method, quantum state reconstruction errors are greatly reduced, time sequence dependence is captured through an LSTM network, physical legality is guaranteed through a quantum main equation, control parameter speed is optimized, 2ns-level time sequence precision is achieved through an FPGA segmentation correction algorithm, and the method has the advantages of being simple in structure, convenient to operate and high in practicability. And the real-time requirement of the quantum error correction code is met.

The invention discloses a data index secure access method and related equipment, and relates to the technical field of data processing.The method comprises the steps that in response to a data access instruction, a dynamic index topological structure matched with a current network delay jitter value is generated based on a dynamic behavior fingerprint of a request terminal; performing real-time reconstruction on the dynamic index topological structure based on spatial and temporal distribution characteristics of the dynamic behavior fingerprints to generate an anti-collision verification path; a quantum noise signal is injected into the anti-collision verification path to form a cross-layer verification channel; performing asymmetric hash chain verification on the target data index through a cross-layer verification channel, and generating a verification result containing a fuzzy topology mark; performing dynamic remapping on the original index node according to the fuzzy topology mark, and outputting a security data index; and performing data access based on the secure data index. According to the method, the dynamicity, the unpredictability and the anti-analysis capability of the index path are realized, and the security and the anti-attack capability in the data access process can be comprehensively improved.

The invention discloses a quantum noise stream signal transmission method and device based on odd-order constellation forming in the technical field of optical transmission communication. The method comprises the following steps: generating four-dimensional chaotic sequences X, Y, Z and W by utilizing a 4D hyperchaotic model according to an initial key; performing serial-to-parallel conversion and up-sampling on the initial key, introducing error bits into a key matrix by utilizing W, and dividing the key matrix into a first state basis matrix and a second state basis matrix; performing specificity comparison or processing on the original data by using the X to obtain first data; dividing the first data into a data matrix and an index bit matrix, and performing joint index modulation to obtain a 9QAM signal; scrambling a subcarrier and a symbol point of the 9QAM signal by using the Y and the Z to obtain a 9QAM scrambled signal; and performing quasi-quantum noise stream encryption processing on the 9QAM scrambling signal by using the first state basis matrix and the second state basis matrix to obtain a 576QAM encrypted signal, performing OFDM modulation, and transmitting the 576QAM encrypted signal in an optical fiber channel.

The invention discloses an anti-interference laser radar based on quantum noise and a ranging method, and belongs to the technical field of laser radars. Coherent state optical signals generated by a laser are split into signal light and local oscillation light through a beam splitter; random phase modulation is carried out on the signal light according to the true random number sequence, so that the phase difference between adjacent signal light is smaller than the vacuum shot noise; the signal light subjected to random phase modulation irradiates a target object after being expanded by the transmitting telescope, and echo signal light is formed after being reflected and enters the receiving telescope; performing coherent detection on the echo signal light by using a coherent detection module and local oscillation light, and generating initial data by collecting an output electric signal; and carrying out phase calculation on the initial data, generating demodulation data, and carrying out shift cross-correlation operation on the demodulation data and the true random number sequence to obtain a target distance. Only random phase modulation is needed, random amplitude modulation is not needed, an amplitude modulator is omitted, and the cost and complexity of the system are reduced.

The invention discloses a monitoring camera image anomaly detection method and system, and relates to the technical field of intelligent monitoring, and the method comprises the steps: obtaining an original video stream, extracting a pixel matrix of a current frame, carrying out the joint coding of the pixel matrix and a motion vector field of an adjacent frame into a quantum state bit vector, inputting the quantum state bit vector into a pre-constructed anomaly detection operator, and carrying out the detection of the anomaly. Executing quantum state evolution calculation in the Hilbert space, and outputting a two-dimensional distribution matrix of each pixel region; integrating the marked binary image and the physical verification conclusion, and when the quantum anomaly probability value reaches the alarm standard and passes the physical verification, outputting an anomaly alarm signal; and the abnormal alarm signal is converted into a confrontation training sample, a cross-scene virtual sample is generated through quantum noise injection, and an abnormal detection operator is dynamically updated. According to the method, the Hilbert space quantum state evolution step is combined, unitary transformation is applied to the quantum state bit vector, the orthogonal projection operation is executed, the accurately quantified abnormal probability distribution matrix is generated, and accurate assessment of the abnormal risk is achieved.

The laser linewidth is an important parameter for characterizing the coherence properties of a single-frequency laser. The disclosure of this patent document provides techniques for characterizing laser spectral linewidths of single-frequency lasers in form of analytical formula in connection with the use of one or more Sigmoid functions of observation time by including various physical origins affecting the laser linewidths in addition to the natural linewidth caused by the spontaneous emission or quantum noise that can be described with an analytical expression known as the Schawlow-Townes-Henry formula. The disclosed methods for characterizing the laser linewidth caused by various factors in analytical formula can be advantageously used in various applications including designing an optical interferometer based sensing device using coherent laser light from a single-frequency laser.

The invention discloses an optical fiber signal transmission system and method based on quantum noise encryption, and relates to the technical field of optical fiber communication, and the system comprises a composite modulation transmitting module, a dispersion compensation relay module, a coherent receiving module and a digital signal processor. The composite modulation transmitting module comprises an electro-optical modulator and a quantum noise randomization encoder; the dispersion compensation relay module comprises an adjustable dispersion compensator and a Raman amplifier; the coherent receiving module comprises a local oscillator laser and a 90-degree optical mixer; a digital signal processor includes a clock recovery unit and a maximum likelihood sequence detector. All the modules are sequentially connected and cooperatively work. And the adjustable dispersion compensator dynamically applies reverse dispersion compensation calculated based on a dispersion coefficient and a transmission distance according to the dispersion amount monitored in real time. According to the invention, through technologies of quantum noise encryption, dynamic dispersion compensation, Raman amplification, coherent reception and the like, safe and efficient transmission with single-wave 400Gbps and 100km transmission bit error rate less than or equal to 1 * 10 <-12 > is realized.

The invention discloses a dynamic transmission method and device based on quantum-like noise stream coding. The method comprises the following steps: generating a chaotic sequence by adopting a 4D hyper-chaotic model according to an initial key; introducing error bits into the initial key, dividing two different matrixes, and performing up-sampling to obtain a key stream real part BI and a key stream imaginary part BQ; carrying out serial-to-parallel conversion on the original data, and carrying out XOR processing on the data real part and the data imaginary part by utilizing the binary chaos sequence to obtain a data stream real part EI and a data stream imaginary part EQ; performing quantum-like noise stream encryption processing according to the data stream real part EI, the data stream imaginary part EQ, the key stream real part BI and the key stream imaginary part BQ to obtain a quantum-like noise stream encryption signal; scrambling a subcarrier and a symbol point of the quantum-like noise stream encrypted signal by using a chaotic sequence to obtain a scrambled signal; and performing OFDM modulation on the scrambled signal, and transmitting the scrambled signal in an optical fiber channel.

The invention provides an urban rail transit communication informatization monitoring device which comprises a rail health monitoring module which combines acoustic CT scanning and electromagnetic eddy current detection to generate a steel rail three-dimensional defect image and obtain rail defect data. The electromagnetic environment sensing and monitoring module extracts quantum noise features, establishes an electromagnetic field-signal system coupling model, and predicts interference of quantum noise on the CBTC system. And the communication signal quality monitoring module monitors signal strength abnormity by using a wireless spectrum analysis algorithm. And the data processing center fuses and analyzes various data and generates a monitoring report. And the visualization module displays the report. The integration technology improves the accuracy and reliability of track defect detection, and enhances the support of track maintenance data. The electromagnetic environment sensing and monitoring module improves the anti-interference capability of the communication system. The communication signal quality monitoring improves the monitoring precision and signal integrity verification, and reduces the false alarm rate.

The invention discloses a hyper-chaotic light quantum noise high-order coherence degree measuring device and method, and relates to the technical field of quantum optics. The device comprises a hyperchaotic light source preparation part and a quantum noise high-order coherence degree measurement part, the hyperchaotic light source preparation part comprises a first polarization beam splitter and a spatial light modulator which are sequentially arranged on an output light path of a first laser generation module; the first reflecting mirror and the second reflecting mirror are sequentially arranged along a transmission light path modulated by the spatial light modulator; according to the quantum noise high-order coherence degree measurement part, a second polarization beam splitter is arranged on an output light path of a second laser generation module, and a first half-wave plate is arranged between the second polarization beam splitter and a second reflector; and the second half-wave plate and the balanced homodyne detection acquisition module are sequentially arranged along the transmission light path processed by the second polarization beam splitter. According to the invention, the problems of unobvious bunching characteristic, complex structure, unstable system, low signal-to-noise ratio of weak quantum signals and poor amplification effect during preparation of the existing hyper-chaotic light source can be solved.

The invention discloses a symbol synchronization and frequency offset estimation method and system for a quantum noise stream encryption system, and the method comprises the steps: generating a conjugate symmetric sequence U based on a PN sequence, and generating a conjugate antisymmetric training sequence based on U; a sending end encrypts a training sequence by adopting a pre-shared key, the encrypted training sequence is added into a data frame, a receiving end receives a data signal comprising the encrypted training sequence, and sequence signals in training sequence positions corresponding to different data positions are recovered based on the key; calculating an autocorrelation value and a timing metric value of the corresponding recovered sequence based on different strategies; and averaging the timing metric values of different strategies to obtain a comprehensive timing metric value, performing symbol synchronization of the quantum noise stream encryption system based on the comprehensive timing metric value, and performing frequency offset estimation based on an autocorrelation value of a symbol synchronization position. The symbol synchronization accuracy and the frequency offset estimation precision in the quantum noise stream encryption system can be improved, and the safety of symbol frequency synchronization is improved.

The application relates to the technical field of quantum precision measurement, and discloses an integrated wide-temperature-range diamond nitrogen vacancy color center quantum noise spectrometer, which comprises an integrated optical path module arranged outside a low-temperature constant temperature module, an electronic module, an integrated laser module and a data processing module; the integrated optical path module is connected with the electronic module and the integrated laser module through an optical fiber and is spatially coupled with the low-temperature constant temperature module; the electronic module comprises a double-path chip-level signal generation path; a microwave antenna and a probe are arranged in the low-temperature module; by mechanically decoupling the integrated optical path module and the low-temperature module, vibration interference caused by the refrigeration process is effectively blocked, a laminated near-field coupling structure and an integrated control circuit are matched, high-stability in-situ quantum sensing under a wide-temperature-range environment is realized, the integration degree and the measurement signal-to-noise ratio of the system are improved, and the overall volume and the manufacturing cost of the whole machine are reduced.

A light emitting device and method thereof, and a gas analysis system and method thereof, are disclosed. The light emitting device includes: an optical comb light source configured to generate an initial light signal; an encoding module configured to encode the initial light signal based on a preset comb code to form a light signal to be processed; and a modulation module configured to perform quantum noise compression on the light signal to be processed to form an emitted light signal. This invention belongs to the field of precision measurement. Through a collaborative architecture of "compressed optical comb + computational encoding," optical comb spectroscopy technology achieves improvements in multiple dimensions, including sensitivity, environmental adaptability, speed, and system complexity.

This invention discloses a method and device for detecting the load at the charging port of an electric vehicle charging pile, relating to the field of charging safety technology. The method includes: acquiring an electrical signal from the charging port; extracting a clean load response signal using a quantum noise-resistant processor based on Majorana fermion operators; inputting the clean load response signal into a pulse neural network autoencoder to generate a neural pulse sequence through a pulse firing mechanism; performing time-frequency domain transformation on the neural pulse sequence to reconstruct a complex impedance tensor, and solving the eigenvalue sequence of the complex impedance tensor; embedding the eigenvalue sequence into a five-dimensional anti-de Sitter space boundary based on the AdS / CFT duality principle, and generating a three-dimensional holographic tomographic map by solving the Einstein field equations relating the volume to the boundary; this invention achieves topological separation of noise and load signal through a Majorana zero-mode waveguide channel, solving the problem of insufficient high-frequency noise suppression in dynamic load scenarios.

According to the data processing device and method based on the controllable quantum noise source and the hash function, by means of controllability of the quantum noise source and adjustable parameters of the hash function, data processing safety can be improved, and flexibility and adaptability of a system can be enhanced. By controlling the quality of the quantum noise source, the randomness of the quantum noise source can be improved, and the stability of the quantum entropy of the quantum noise source can be maintained, so that the randomness of the system is improved, and the stability of the quantum proportion is ensured. By means of the hash function with the control parameters and the control parameter dynamic adjustment scheme thereof, the control parameters of the hash function not only can be preset, but also can be dynamically adjusted according to actual scene requirements, a more flexible and customized data processing scheme is provided, and the flexibility of the system is greatly improved.

The present application relates to the field of spectral analysis, and relates to an absorption spectrometer and a direct measurement method of absorption light intensity. The present application provides an absorption spectrometer which can directly measure absorption light intensity. The absorption spectrometer comprises a light source assembly, a sample cell, a semi-transparent mirror and a light detector. The absorption spectrometer also provides a direct measurement method of absorption light intensity. In the front light path of two coherent lights, a same sample cell is placed in each light path. The optical path of one light is adjusted until the output of the light detector included in the absorption spectrometer is minimum. Then, a sample to be measured is added to one sample cell, and a blank solution is added to the other sample cell. At this time, the light detector measures the intensity of the remaining light which is not completely cancelled after the convergence of the two lights, i.e. the intensity of the light absorbed by the sample to be measured, i.e. the absorption light intensity. The absorption spectrometer provided by the present application detects absorption light intensity, while the traditional absorption spectrometer detects absorbance. Changing the detection of absorbance to the detection of absorption light intensity can avoid the quantum noise of a large signal from drowning out a weak signal, thereby greatly improving the detection sensitivity of the absorption spectrometer.

The application relates to a method, device and equipment for anti-deepfake speech based on quantum resonance peak disturbance, wherein the method comprises the following steps: reading an original speech signal, extracting a fundamental frequency and a formant frequency of the original speech signal; creating a parameterized quantum circuit to generate quantum noise; adding the quantum noise to the extracted fundamental frequency and formant frequency to obtain a disturbed signal; and preprocessing the disturbed signal to obtain a reconstructed speech signal. The optimized quantum noise generated by the quantum neural network can effectively interfere with the learning and generation of speech features by a deepfake model. Through the design of a loss function and the adjustment of an optimization algorithm, the speech after adding the noise is ensured to have the smallest difference in hearing from the original speech.

The present application discloses a multi-channel output quantum random number generation device and a multi-channel output quantum random number generation method. The multi-channel output quantum random number generation device includes a laser light source, a cascaded beam splitter module, a first homodyne detector, a second homodyne detector, a first signal processing module, a second signal processing module, and a control module. The technical solution of the present application obtains two optical signals with the same randomness at the entropy source level through optical path design, and obtains quantum noise by separately detecting these two optical signals and converts them into the same quantum random numbers. The whole process does not require the copying of electronic data, retains the true randomness of the two entropy sources, and reduces the risk of data being stolen and tampered with.

[Problem] To provide an optical secure communication system with higher safety by carrying a QNSC signal using a coherent Hermite-Gaussian pulse, multiplexing the QNSC signal using coherent Hermite-Gaussian pulses of different orders, and adding a masking effect in a time domain. [Solution] An optical secure communication system for a quantum noise stream cipher (QNSC) signal for masking the phase and / or the amplitude level of an optical signal using quantum noise, wherein carrier light in a transmission unit and locally oscillated light in a reception unit of the QNSC signal comprise a coherent Hermite-Gaussian pulse with an amplitude given by an Hermite-Gaussian function.

The present invention belongs to the field of optical communication technology and optical network, and specifically relates to a physical layer security protection system based on endogenous optical network. The purpose of the present invention is to provide a key generation optical network physical layer security protection method based on channel characteristics in an optical network, which plays an important role in building and promoting the development of endogenous optical communication systems. The present invention combines the randomness of physical noise with a suitable algorithm to implement a data protection scheme to achieve high-speed encryption based on the extraction of passwords based on physical layer channel characteristics. Specifically, a seed key with a low generation rate is used to encrypt a high-speed optical link, and a high-order signal is formed by using a running key / state base and a data signal in a high-speed optical channel, and optical quantum noise stream encryption is performed, and physical layer damage suppression is performed through digital signal processing methods, thereby improving the transmission performance of the system while ensuring the security of the optical transmission system.

This application provides a rubidium optically pumped magnetometer and its measurement method, belonging to the field of magnetometer technology. The entangled photon component includes a first laser and a nonlinear optical crystal, the nonlinear optical crystal being used to convert photons emitted by the first laser into entangled photon pairs; a rubidium atom gas cell for receiving the entangled photon pairs; a laser cooling system for cooling rubidium atoms to a Bose-Einstein condensate; and an interferometer phase detection system including a second laser, a first beam splitter, a beam combiner, and a signal processor. This application introduces entangled photons to form a quantum entangled state with rubidium atoms. The introduced entangled photons, through coupling with the rubidium atom system, form an enhanced quantum interference effect. Traditional rubidium optically pumped magnetometers are limited in measurement accuracy by quantum noise, but by introducing entangled photons, the system's measurement noise is reduced, thereby achieving higher measurement accuracy.

A system to secure digital in-transit communication is disclosed. It includes true random bits generation, a secure digital key distribution and an encryption system for broad use. It offers post quantum-resistant characteristics. The system uses true random bits generated from vacuum quantum fluctuations. The distribution of these bits is protected by recorded quantum noise and works in standard communication channels.

The invention provides a quantum noise compression type laser gyroscope. The laser gyroscope comprises a microcrystalline glass cavity, a cavity length adjusting mechanism, a mechanical shaking wheel, an output mirror and a reflecting mirror, a mirror mounting surface and a cavity length adjusting mechanism mounting surface are arranged on the side surface of the glass ceramic cavity, the reflecting mirror and the output mirror are respectively arranged on the mirror mounting surface, and the cavity length adjusting mechanism is arranged on the cavity length adjusting mechanism mounting surface; the microcrystalline glass cavity is supported on the machine shaking wheel through the shaking wheel mounting hole; an inner cavity of the glass ceramic cavity is a resonant cavity, and a plurality of layers of annular light paths are formed in the resonant cavity. According to the quantum noise compression type laser gyroscope provided by the invention, the light path length can be multiplied under the condition that the thickness and the weight of the laser gyroscope are slightly increased, and the luminous flux can be increased at the same time, so that the limit precision of the laser gyroscope is improved.

According to the high-signal-quality physical layer encrypted free space optical communication method and system provided by the invention, quantization noise can be effectively controlled through DSM modulation, high-frequency noise is removed, so that high quality and low distortion of signals are kept in the transmission process, and especially in long-distance and severe-environment communication, the high-quality and low-distortion performance of the signals is ensured. And the signal stability can be obviously improved. Wherein in the physical layer encryption process of quantum noise stream encryption and the like, quantum noise or random phase jump is used as a means for generating an encrypted signal to introduce certain noise, the noise shaping characteristic of DSM modulation plays an important role, the noise is concentrated in a high-frequency area to reduce low-frequency interference caused by the quantum noise, and the quantum noise stream encryption is realized. The signal quality is optimized, and the bit error rate is reduced. Interference caused by quantum noise and external environment factors can be effectively eliminated in the signal transmission process, and therefore the transmission stability of a system and the reliability of signals are improved.

The invention discloses a multi-channel quantum noise stream encryption system and method, and relates to the technical field of quantum secret communication. The system comprises a transmitting end signal generation modulation module, a 1 * P beam splitter and P (P is greater than or equal to 2) receiving end signal detection modules. After a target binary sequence obtained after spectrum spreading and quantum noise stream encryption are carried out on a plurality of initial binary sequences is obtained, a sending end signal generation modulation module can carry out IQ modulation on the target binary sequence, a composite optical signal is generated, and the composite optical signal is transmitted to a 1 * P beam splitter; after receiving the composite optical signal, the 1 * P beam splitter can distribute the composite optical signal to P receiving end signal detection modules; each receiving end signal detection module can perform coherent detection on the received composite optical signal to obtain a beat frequency signal; and the beat frequency signal is decrypted to obtain information in the initial binary sequence.

The invention discloses a method for calibrating projection parameters of an X-ray machine, and relates to the technical field of medical image and diagnostic equipment. A dual-channel feature extraction module dynamically shields high-noise region response in a spatial dimension, and meanwhile, key anatomical structure features are reserved by using a channel gain mechanism, so that interference of quantum noise on edge positioning is effectively suppressed; a generative adversarial framework converts parameter regression into an optimization task driven by reconstruction quality, a discriminator forces a generator to output offset conforming to a physical projection rule based on structural similarity constraints of pre-training depth features, and the bottleneck that an optimization algorithm falls into a local extremum under low signal-to-noise ratio data is broken; triple constraint terms in the loss function balance parameter precision and image authenticity through a weight adaptive mechanism, geometric parameters are quickly converged in the early stage of training, texture consistency is enhanced in the middle and later stages, and artifact distortion caused by insufficient dosage is reduced.

The application discloses a dynamic transmission method and device based on quantum-like noise flow coding, and the method comprises the following steps: generating a chaotic sequence by using a 4D hyperchaotic model according to an initial key; introducing the initial key into error bits, dividing the error bits into two different matrices, and then performing upsampling to obtain a real part B I and an imaginary part B Q of a key stream; performing serial-parallel conversion on original data, and performing exclusive or processing on data real parts and data imaginary parts by using a binary chaotic sequence to obtain data stream real parts E I and data stream imaginary parts E Q ; performing quantum-like noise flow encryption processing on the data stream real parts E I , the data stream imaginary parts E Q , the real part B I of the key stream and the imaginary part B Q of the key stream to obtain a quantum-like noise flow encryption signal; performing scrambling on subcarriers and symbol points of the quantum-like noise flow encryption signal by using a chaotic sequence to obtain a scrambled signal; and performing OFDM modulation on the scrambled signal and then transmitting the scrambled signal in an optical fiber channel.

The present invention provides a quantum noise compression type laser gyroscope. The laser gyroscope includes a microcrystalline glass cavity, a cavity length adjustment mechanism, a mechanical dither wheel, an output mirror, and a reflecting mirror. A mirror mounting surface and a cavity length adjustment mechanism mounting surface are provided on the side surface of the microcrystalline glass cavity. The reflecting mirror and the output mirror are respectively arranged on the mirror mounting surface, and the cavity length adjustment mechanism is arranged on the cavity length adjustment mechanism mounting surface. The microcrystalline glass cavity is supported on the mechanical dither wheel through a dither wheel mounting hole. The inner cavity of the microcrystalline glass cavity is a resonant cavity, and multiple layers of annular optical paths are formed in the resonant cavity. The quantum noise compression type laser gyroscope proposed by the present invention can multiply the optical path length with only a small increase in the thickness and weight of the laser gyroscope, and at the same time increase the optical flux, thereby improving the ultimate accuracy of the laser gyroscope.

The invention relates to the technical field of quantum noise measurement, in particular to a method for quickly calculating quantum noise in a microcavity soliton optical frequency comb. The method comprises the following steps: establishing a dynamic stability analysis model of solitons in a microcavity system, and solving a steady-state solution; identifying stability characteristics of the steady-state soliton solution in the disturbance space based on the solved steady-state solution; constructing a noise physical model of solitons in the micro-cavity system, wherein the noise physical model is used for evaluating the noise performance of a single soliton micro-comb; calculating the power spectrum density based on the solved steady-state solution and the noise performance of the single soliton micro comb; and solving the noise of the quantum in the soliton optical frequency comb in the microcavity system. According to the method, modeling is carried out on a timing jitter mechanism caused by quantum noise, and a time domain nonlinear coupling system is mapped to a modal feature space. The solution carried out in the feature domain not only improves the calculation precision, but also enhances the numerical stability and rapid convergence capability of the algorithm.

The invention discloses a communication system, and relates to the technical field of secret communication. The communication system comprises a signal generation modulation module and a signal detection demodulation module which are in communication connection. A signal generation modulation module is used for splitting an initial optical signal into first polarized light and second polarized light which are orthogonally polarized; generating a composite optical signal based on the first polarized light, the second polarized light, the randomly distributed binary sequence signal, the multi-system sequence signal obeying Gaussian distribution, the quantum noise stream encryption operation, the carrier wave of the first frequency and the carrier wave of the second frequency; performing power attenuation on the composite optical signal, and outputting a target optical signal; and the target optical signal is sent to the signal detection demodulation module. A signal detection demodulation module in the application is used for receiving a target optical signal; generating two groups of beat frequency electric signals based on the local oscillation optical signal and the target optical signal; and processing the two groups of beat frequency electric signals to generate binary sequence signals and multi-system sequence signals.