89results about "Electromagnetic transmission optical aspects" patented technology

The utility model provides a kind of wireless electric energy data hybrid transmission assembly, belong to wireless power supply device field.The wireless electric energy data hybrid transmission assembly includes transmitting unit and receiving unit, transmitting unit is equipped with wireless electric energy transmitting circuit and first wireless optical transmission circuit, receiving unit is equipped with wireless electric energy receiving circuit and second wireless optical transmission circuit, first wireless optical transmission circuit includes first active wireless optical module, and second wireless optical transmission circuit includes second active wireless optical module.The utility model utilizes the light signal of active wireless optical module emission to carry out the wireless transmission of data between transmitting unit and receiving unit, not influenced by electromagnetic interference, and active wireless optical module transmission distance is farther under non-contact condition, can adapt to more use occasion.

This invention relates to the field of information security technology, specifically to a blockchain-based anti-tampering system for marine environmental data. The system includes a wave crest localization module, a waveform feature extraction module, a fingerprint generation module, a tag mapping module, and an on-chain storage module. In this invention, deep analysis of seawater multispectral light intensity waveform data is performed to extract wave crest curvature geometric indices and wavelength differences, constructing a set of morphological parameters. Component coupling weights are used to generate an on-chain fingerprint sequence reflecting the constraints of water quality components. Dynamic state tags are generated by mapping instantaneous flow velocity to tidal cycle flow velocity ranges. The fingerprint sequence and dynamic tags are encapsulated into blocks and subjected to fluid dynamic continuity verification. A distributed ledger consensus mechanism is used to lock the physical temporal relationship of the data, realizing a transformation from simple numerical recording to multi-dimensional logical verification of environmental characteristics, effectively avoiding the tampering risks associated with centralized storage.

This invention belongs to the field of underwater target search technology, specifically involving a multi-platform acoustic-optical coordinated underwater target search and transmission device and method. It includes the following steps: S1, multi-ship cooperative wide-area sonar search; S2, near-field approximation and position correction; S3, acoustic-optical coordinated data transmission: when the distance between the underwater vehicle and the target is less than the optical communication ranging threshold, the underwater optical communication module located in the search and transmission device is activated. The underwater acoustic communication module tracks the target's bearing, and the underwater optical communication module achieves accurate ranging and data transmission. During transmission, the underwater acoustic communication module continuously measures the relative position with the target, and performs closed-loop control of the underwater vehicle's attitude and navigation direction to maintain the stability of the optical communication link until data transmission is complete. This invention solves the technical problems existing in current underwater target search and transmission methods regarding the platform, search range, search accuracy, and data transmission performance.

The application discloses a kind of underwater backscattering communication methods based on visible light, comprising: S1: design screen information transmission mode;S2: design event data filter;S3: construct active flickering event surface and evidence map;S4: carry out adaptive detection and positioning of region of interest;S5: carry out spatial domain signal downsampling and signal-to-noise ratio enhancement;S6: to the event data stream that has passed downsampling and signal enhancement is based on time domain characteristics and spatial density characteristics Frame clustering is carried out;S7: carry out homography perspective transformation and geometric normalization;S8: carry out gridding space demodulation and data recovery.The application can realize higher rate data transmission with the aid of optical signal, and overcome the finiteness of traditional underwater optical communication technology in underwater low-light environment and the problem of frequency mismatch between transmitting and receiving parties, and the data transmission stability is higher.

This invention discloses a communication configuration method, device, electronic equipment, and storage medium for differential protection of distribution network ring networks, belonging to the field of power automation technology. The method includes: disconnecting all differential protection circuits within the first target differential ring where the fault differential protection device is located; disconnecting the optical fiber link between the fault protection device and other differential protection devices; after replacing the fault differential protection device with a new differential protection device, restoring the optical fiber link between the new differential protection device and other differential protection devices; controlling the static routing table corresponding to the first target differential ring to be updated, setting the differential protection activation identifier of the first target differential ring in the static routing table, and the differential protection activation identifier of each differential protection device within the first target differential ring, to the corresponding activation status identifier. Therefore, by implementing this invention, the problems of existing technologies that rely on manual on-site parameter setting, resulting in high cost and low reliability can be solved.

This invention discloses an attack tracing method and system for end-to-end data transmission in optical communication, belonging to the field of optical fiber communication technology. The method includes: processing an initial key value using a hash function and DNA encoding to generate a DNA sequence; concatenating the DNA sequence to generate a session key and calculating its hash value; calculating a single-byte XOR checksum of the original data to generate extended data, generating ciphertext based on the extended data, and calculating a digest of the ciphertext; decrypting the ciphertext and performing XOR checksum consistency verification to obtain an event digest; calculating a root hash based on the key digest, parameter digest, ciphertext digest, and event digest, storing the root hash in the block header, and performing attack tracing on the block header to obtain the attack tracing result. This invention introduces four-dimensional chaos and DNA encoding to generate a high-entropy key, dynamically storing and updating the key through blockchain, while simultaneously achieving single-root verifiable attack tracing and quickly locating problematic nodes.

The application relates to a direction modulation-based covert secure transmission method and a communication base station, and belongs to the technical field of wireless communication. In view of the case that channel state information is non-ideal and distortion noise exists, a robust direction modulation technology is adopted, a continuous convex approximation algorithm is used to optimize and select a transmitting end, a combination with low secrecy capacity is eliminated, the secrecy capacity is improved, the possibility of eavesdropping by a eavesdropping user is reduced to a certain extent, and physical layer secure communication is further ensured.

A communication system that includes a master communication device, a service communication device, and passive optical routing devices is provided. The master communication device obtains first signal from data source or modem and directs first laser beam carrying the first signal in a downstream path to the service communication device directly or via the plurality of passive optical routing devices. The service communication device demodulates the first signal from the first laser beam, re-modulates the demodulated first signal into a plurality of different radio frequency (RF) signals associated with different communication protocols having different communication ranges, and serves a plurality of end-user devices based on wireless communication capabilities of the plurality of end-user devices and the re-modulation of the demodulated first signal into the plurality of different RF signals.

An optical-electrical integrated circuit system, method and device for optically coupling together a plurality of integrated circuits. Specifically, the system, method and device includes a waveguide network within an optical interface layer of a package, wherein the network optically interfaces with surface emitting light sources and photodetectors. Electrical signals received from the integrated circuits by the light sources are converted to optical signals and transmitted through the network to the photodetectors which convert the optical signals back into electrical signals that are forwarded to the receiving integrated circuit.

The application discloses a network time slot and key cooperative scheduling method and system fused with QKD and PQC, belongs to the technical field of quantum key distribution, and comprises the following steps: S1, constructing a unified resource state library; S2, designing a strategy engine and initializing parameters; S3, receiving a service request and performing preliminary screening; S4, performing time slot-key distribution according to service requirements; S5, monitoring real-time states, returning to step S3 if there is no exception, and performing step S6 if there is an exception; and S6, performing fault processing and optimizing resource distribution. The application adopts QKD+PQC fused keys in the technical field, not only uses QKD keys for encryption, but also considers using PQC encryption algorithms for service encryption, combines two different key resources with OTN time slots, fully and reasonably schedules and distributes key resources while ensuring uninterrupted service encryption, and maximally guarantees the security of an operator OTN network.

This invention discloses an optical non-reciprocal information encryption method and apparatus based on a time crystal. The method includes the following steps: S1, providing a three-level atomic system containing rubidium atoms, and setting a probe light and a coupling light, wherein the probe light is incident on the atomic system in a fixed direction; S2, controlling the coupling light to propagate collinearly in the opposite direction to the probe light, causing the atomic system to enter a time crystal state and generate a transmission signal with a stable oscillation frequency; S3, acquiring the oscillation frequency of the transmission signal and encoding the oscillation frequency as key information; S4, placing the atomic system in a non-time crystal state, where the transmission signal does not contain the oscillation frequency, thereby achieving non-reciprocal encryption of the key information. This invention causes the atomic system to enter or leave a time crystal state to generate or suppress a transmission signal with a stable oscillation frequency, and encodes and encrypts the oscillation frequency as key information.

This invention provides an energy adaptive adjustment device and method for underwater wireless optical communication, relating to the field of underwater wireless optical communication. The device includes: an adaptive adjustment module, a signal processing module, an optical antenna, a tunable optical attenuator, and a beam splitter. The tunable optical attenuator adjusts the light intensity energy of the optical signal according to the feedback signal from the adaptive adjustment module. The beam splitter splits the optical signal output from the tunable optical attenuator into two paths, one transmitted to the adaptive adjustment module and the other to the signal processing module. The signal processing module generates an energy calibration result and sends it to the adaptive adjustment module, and receives the optical signal from the beam splitter, processes it, and outputs it. The adaptive adjustment module receives the signals from the beam splitter and the signal processing module, processes them, and feeds them back to the tunable optical attenuator. This invention solves the problem that the signal energy detected by the receiving end of the device cannot be adaptively adjusted, improving the practicality and robustness of the communication device.

This invention discloses an attack-resistant quantum key distribution method and system based on real-time statistical monitoring of light sources, belonging to the field of quantum communication. This invention utilizes the second-order correlation function g of a subposon solid-state single-photon source. (2) (0) As a "security fingerprint," it achieves high-sensitivity, millisecond-level detection of photon number splitting (PNS) attacks by monitoring its statistical offset during communication in real time. In a secure state where no attack is confirmed, the system activates an enhanced mode, legally incorporating the key contribution of two-photon pulses within the framework of information-theoretic security through a security weight factor dynamically determined by the monitoring results, thereby overcoming the conservative limitation of unconditionally eliminating multi-photon pulses in the traditional GLLP framework. This invention significantly reduces the hardware requirements for the purity of single-photon sources, enabling efficient utilization of medium-purity light sources; simultaneously, in high-loss scenarios, the key rate can be increased by more than three orders of magnitude compared to existing technologies, significantly extending the relay-free secure transmission distance of QKD.

The application discloses a wireless node cooperative communication low-power control method based on distributed optical fiber sensing and belongs to the technical field of distributed optical fiber sensing and Internet of Things communication fusion. The method relies on a heterogeneous cooperative system composed of a distributed acoustic sensing (DAS) host, a center server and a wireless acoustic wave acquisition terminal, and realizes cooperative control through wireless terminal time synchronization, hardware silent cycle recording, adaptive wake-up instruction generation, historical data cross-border backtracking, narrowband feature extraction and heterogeneous data fusion decision. The application solves the problems of high energy consumption of wireless nodes, missing event starting data and bandwidth waste in the prior art, realizes low-power long-term deployment, complete event capture and high-reliability identification through on-demand wake-up and data processing guided by DAS, and is suitable for long-distance pipeline, power line and other safety monitoring scenes with strict requirements for real-time response and low power consumption.

This application discloses a ticket verification method, system, and corresponding device. The method includes: a user receiving an optical signal containing token information sent by a first offline device; obtaining information about the first offline device from a server using the token information; and sending the information of the first offline device and the electronic ticket information to the server, so that the server, after successfully verifying the electronic ticket information, sends a first instruction to a second offline device based on the information of the first offline device. The first and second offline devices are the same device, or the second offline device is associated with the first offline device, and the first instruction indicates successful ticket verification. This application transmits token information via optical signals and verifies electronic tickets based on the token information. Due to the difficulty in copying optical signals, users cannot provide token information to other users, avoiding the situation of multiple uses of a single ticket and improving the security of ticket verification.

Described herein are balanced, bidirectional, optical communication networks. These networks may be used in large-scale settings, including in networks including more than one hundred nodes or more than one thousands nodes. A network may include a plurality of nodes. Each node comprises a plurality of optical transceivers of a first type and a plurality of optical transceivers of a second type. The types differ from each other in a characteristic of light transmitted by the respective optical transceiver. The optical transceivers of the first type are in equal numbers across the plurality of nodes and the optical transceivers of the second type are also in equal numbers across the plurality of nodes. A plurality of optical channels connect the nodes with one another by coupling optical transceivers of the first type with optical transceivers of the second type. The optical channel support bidirectional communication between the connected nodes.

A method of determining an offset between a first time reference and a second time reference is disclosed. The method comprises obtaining (102) information relating to a detection time at a first node of a first photon of a first pair of photons, and a detection 5time at a second node of a second photon of the first pair of photons; obtaining (104) information relating to a detection time at the first node of a first photon of a second pair of photons, and a detection time at the first node of a third photon; and determining (106) an offset between a first time reference at the first node and a second time reference at the second node based on the obtained information. An apparatus, a computer program 0and a computer program product for determining an offset between a first time reference and a second time reference are disclosed.

A plurality of photoelectric conversion circuits (30A–30H) of a signal processing device (10) include active photoelectric conversion circuits (30A–30F) that are connected to input / output ports (41A–41F) of an optical switch (40), and standby photoelectric conversion circuits (30G and 30H) that are connected to input / output ports (41G and 41H) of an optical switch (20). When, for example, the photoelectric conversion circuit (30A) among the photoelectric conversion circuits (30A–30F) fails, the optical switch (40) connects an input port (42A), which is connected to the input / output port (41A), and the input / output ports (41G and 41H), to which the standby photoelectric conversion circuits (30G and 30H) are connected.

A system and method for authenticating an optical fiber key includes selecting a plurality of at least partially randomized challenge pulse parameters, generating a first optical challenge pulse based on the plurality of at least partially randomized challenge pulse parameters, determining an optical response signal based on a reflected signal of the first optical challenge pulse from the optical fiber key, applying a comparing algorithm the optical response signal and an expected response based on previously recorded optical response signals of the optical fiber key to a reference optical challenge pulse for determining a similarity metric, and authenticating the optical fiber key based on the similarity metric.

This invention discloses a method and system for implementing a completely reference-frame-independent quantum key distribution protocol, belonging to the field of quantum information technology. Alice and Bob, the communicating parties, randomly select mutually unbiased basis vectors to prepare quantum states and send them to a third party, Charlie. Charlie performs Bell state projection measurements and announces the success. Both parties publish the basis vector information, divide the dataset, and calculate the gain and bit error rate. A 3×3 correlation tensor matrix is ​​constructed and singular value decomposition is performed to obtain three reference-frame-independent singular values. The secure key rate is calculated based on the bit error rate. Finally, key negotiation and security enhancement are performed to extract the secure key. This invention does not require basis vector alignment, completely eliminating the dependence on reference frame calibration. It can still stably generate keys even with basis vector drift, and the amount of information required by eavesdroppers is lower, significantly improving the practicality and security of the quantum key distribution system.

A computing device includes an optical network transceiver and a basic input / output system (BIOS). The optical network transceiver is to connect to an optical network and to generate an event indicating that an optical signal strength has attenuated below a threshold. The BIOS is to determine generation of the event by the optical network transceiver, and responsively detect occurrence of a potential optical network intrusion attack. In response to detecting occurrence of the potential optical network intrusion attack, the BIOS is to perform an action to protect the computing device from the potential optical network intrusion attack.

A photonic device (10) is proposed, comprising an emitting component (100) configured to emit at least one emission signal (S1) including an optical signal component, a receiving component (200), and an interconnecting component (300) between the emitting component (100) and the receiving component (200). The interconnecting component (300) includes at least one microtube (310) adapted to transmit the optical signal component from the emitting component (100) to the receiving component (200). A microtube (310) comprises a wall (314) and an internal medium (312) adapted to propagate the optical signal component, surrounded by the wall of the microtube. The wall (314) is adapted to separate the internal medium (312) from an ambient medium (40) in which the photonic device (10) is immersed.

This utility model relates to the field of optical module circuit technology, specifically to a circuit compatible with two types of optical receiving components. The circuit includes: an MCU control circuit with a power sampling pin for acquiring received optical power; an APD boost circuit for providing high-voltage power to the APD ROSA, with a power monitoring pin for characterizing optical power; and a ROSA interface circuit for connecting to either a PIN ROSA or an APD ROSA, with a power signal pin. The purpose of this utility model is to provide a circuit compatible with two types of optical receiving components, reducing material inventory and circuit board manufacturing costs, thereby reducing overall costs.

The utility model discloses a kind of optical fiber camera systems based on single optical fiber realizes signal energy same transmission, including the main control unit and optical fiber camera unit connected by single optical fiber, main control unit includes main processor module, power light source, main control end optical transceiver module, main control end wave division multiplexer, optical fiber camera unit includes camera end wave division multiplexer, photovoltaic conversion module, power management module, image sensor, camera end optical transceiver module, camera end controller;System utilizes wave division multiplexing principle, transmits power light beam with first wavelength in single optical fiber, and carries out two-way data communication with second, third wavelength;Not only completely eliminate the independent power supply copper cable of camera, simplify vehicle-mounted wiring, also through integrated intelligent management and redundancy safety module, the energy efficiency, reliability of link are significantly improved.

This invention relates to a large field-of-view diversity receiver for underwater wireless optical communication, belonging to the field of underwater optical communication technology. It includes a top lens-detector module pointing vertically towards the zenith and four surrounding side lens-detector modules. The four side modules are evenly distributed along the circumference and have a uniform tilt angle relative to the zenith direction, causing the spatial fields of view of each module to partially overlap, thus synthesizing a large composite field of view. Each module consists of a defocused condenser lens and a photodetector. This invention avoids the trade-off between gain and field of view limitation of traditional single-lens receivers, relaxing communication alignment requirements while retaining the high-speed transmission advantage of small-area detectors. Combined with a signal combining algorithm, it can effectively combat underwater signal fading, making it suitable for underwater wireless optical communication systems.

This invention discloses a fiber optic power control system and method for information-energy co-transmission based on service quality awareness, belonging to the interdisciplinary field of fiber optic communication and radio frequency signal transmission. Addressing the shortcomings of existing fiber optic information-energy co-transmission technologies, such as fixed power allocation and lack of service awareness, this invention collects remote service quality, equipment energy status, and fiber optic link parameters. After spatiotemporal alignment, data cleaning, and feature fusion preprocessing, a multi-objective optimization decision model is constructed to solve for the optimal control parameters. The laser bias current and modulation depth are dynamically adjusted to achieve dynamic allocation of energy and information power. A closed-loop control is then formed through effect evaluation. The system includes a central office transmitter, a single-mode fiber optic channel, and a remote receiver. This invention achieves service-driven power control, improving optical power resource utilization and system robustness, and ensuring stable operation of remote equipment.

Modulated active sensor waveforms are used to transport data, within a system, to a decision-making computer, in an autonomous or semi-autonomous operation environment. Modulation creates distinct waveforms when a multitude of in-band signals are present. The waveform content is shared between the paired transmitter and receiver, validating the data content of the echo. Variable data are the modulation pattern, controlled by a processor within the system, matching patterns tests at the receiver select which data enter the critical autonomous processes. Matched echoes are secured controlled communications. Validation of the system's transmitter modulation, at the receiver, enhances security of autonomous actions for robotic systems on roads and in factories, transportable computers in office and home settings. Secondarily these secured, under-utilized, resources can safely be aggregated and repurposed without risk to their primary functions once secure communications are established.

This invention belongs to the field of connection device technology, specifically a connection device and method for connecting an optical device to a motherboard. The device includes a base and a housing fixedly mounted on the top of the base. A maintenance cover is fixedly mounted on the surface of the housing, and screws are equidistantly mounted on the surface of the maintenance cover. An anti-interference layer is fixedly disposed on the inner wall of the housing. The maintenance cover is mounted through the housing, the screws are mounted through the maintenance cover, the anti-interference layer is mounted through the housing, a leakage protection layer is mounted through the anti-interference layer, and a heat-conducting layer is mounted through the leakage protection layer. The maintenance cover closes the housing, facilitating cleaning and maintenance. Furthermore, the combined use of the anti-interference layer and the leakage protection layer reduces the influence of external electromagnetic waves on the connection device and minimizes the impact of leakage on the external environment of the connection device, thereby improving the stability and safety of the connection device.

The application discloses an organic room-temperature phosphorescent material with a secondary light response property and a preparation method and application thereof, and relates to the technical field of organic room-temperature phosphorescent materials.The phosphorescent emitter structure provided by the application is shown as formula I, and the organic room-temperature phosphorescent material with the secondary light response property comprises the phosphorescent emitter, a polymer matrix and an oxygen barrier layer.The material has the characteristics of super-long lifetime and high brightness, the phosphorescent lifetime is up to 333 ms at the longest, and the phosphorescent quantum yield is up to 21.3% at the highest.The phosphorescent signal of the material can produce two different responses to 365 nm ultraviolet irradiation of different time lengths.The application also provides application of the phosphorescent material in light response phosphorescent pattern re-editing and phosphorescent information encryption.