1392 results about "Fiber-optic communication" patented technology

The invention provides an optical fiber communication equipment monitoring method and system based on big data and a medium, and belongs to the technical field of optical fiber communication and big data. The method comprises the following steps: synchronously acquiring operating parameters and environmental parameters of optical fiber equipment through a multi-source sensor network, and generating a standard parameter information matrix through space-time alignment and noise suppression; further extracting characteristics such as an optical signal stability index and vibration energy anomaly through time-frequency domain conjoint analysis, and constructing an equipment health state matrix; and predicting a degradation process based on a bidirectional LSTM model of an attention mechanism, and outputting a visual diagnosis result in combination with a dynamic threshold grading alarm mechanism. According to the scheme, the problems of high false alarm rate and insufficient prediction capability of a traditional monitoring method are solved, the false alarm rate is reduced, and the fault prediction accuracy is improved.

The invention relates to the technical field of communication, and discloses an optical fiber performance automatic test method, system and device based on optical power detection. The method comprises the following steps: carrying out intelligent scanning detection on an optical fiber network, generating optical fiber resource mapping data, obtaining an OTDR measurement configuration table through dynamic analysis, executing optical pulse injection and signal acquisition to obtain a time domain response characteristic curve, obtaining an optical fiber performance parameter set through wavelet denoising and peak value identification processing, and obtaining the optical fiber performance parameter set. And performing fault analysis by using deep learning and expert rules to obtain diagnosis decision data, and finally generating an optical fiber state evaluation report through digital twin modeling. According to the invention, remote automatic testing, intelligent fault diagnosis and visual monitoring management of the optical fiber network can be realized, and the operation and maintenance efficiency and reliability of the optical fiber communication network are improved.

The invention relates to the technical field of optical fiber communication monitoring, in particular to a passive optical fiber multi-parameter digital twin drive abnormal root cause positioning method and system. Collecting temperature, stress, acoustics and polarization signals, and constructing a time domain, frequency domain and energy domain coupling feature tensor and time sequence data set; performing nonlinear dimension reduction and feature decoupling by using a beta-VAE model, and dynamically quantifying contribution of each parameter to anomaly by using an integral gradient to form a contribution degree vector group; constructing a PINN digital twinborn model embedded with heat conduction and elasto-optical effects, and predicting a normal fluctuation range under contribution vector weighting and data-physics dual constraints; modeling measurement and prediction deviations under the guidance of contribution vectors, and outputting an abnormal measurement score, confidence, a position and a time sequence; and a causal graph neural network is constructed, topology and abnormal events are fused for tracing causes, a fault source is identified, and the model is subjected to closed-loop calibration. According to the invention, data driving and a physical mechanism are fused, and accurate detection and root cause positioning of the abnormity of the optical fiber system are realized.

Disclosed in the present invention is a method for automatically measuring and adjusting the refractive index of the cross-section of an optical fiber. The method comprises the following steps: S1, optical fiber alignment; S2, detection of optical signals; S3, automatic compensation for optical fiber fusion splicing; S4, analysis of the optical signals; and S5, automatic adjustment and compensation. Compared with the conventional related art, the automatic compensation technique for optical fiber fusion splicing in the present invention has advantages such as higher quality stability, reduced manual intervention, precise parameter adjustment, rapid response capability and improved production efficiency, and is applicable to production and application in the field of optical fiber communications.

The invention relates to the technical field of optical fiber communication, and discloses an optical fiber connector optical loss automatic detection method, device and equipment, and the device comprises a modulation signal dynamic adjustment module, an environment parameter adaptive calibration module and a deep learning prediction model. The modulation signal dynamic adjustment module enhances the separability of optical fiber signals through dynamic phase modulation, and the detection precision is improved; the environmental parameter self-adaptive calibration module compensates the influence of temperature, humidity and vibration on optical signals in real time, and the stability of the system is improved; the deep learning prediction model is based on multi-dimensional data fusion and weight dynamic optimization, high-precision prediction of the performance degradation trend of the optical fiber connector is achieved, closed-loop logic from data collection to real-time prediction is formed, experiments show that the detection precision of the method can reach 99.2%, the prediction accuracy is improved to 93% or above, the optical loss calculation error is reduced to 1%, and the method can be widely applied to the field of optical fiber connectors. And meanwhile, the response speed is increased to millisecond level. The method is suitable for monitoring and predicting the optical fiber performance in a complex environment, and the precision and the real-time processing capability are remarkably improved.

The invention discloses an optical fiber passive voltage and current fault diagnosis method, device, equipment and medium, and relates to the technical field of fault diagnosis, and the method comprises the following steps: generating and transmitting a test signal at a transmitting end of an optical fiber communication system, converting the test signal into an electric signal, and carrying out the time domain and frequency domain analysis of the electric signal; performing feature extraction on the electric signal based on a multi-dimensional analysis algorithm to obtain an electric signal multi-dimensional feature data set; monitoring data and fault historical data corresponding to the multi-dimensional feature data set are acquired, a fault evaluation model is constructed, and a fault evaluation coefficient is generated; and obtaining the fault evaluation coefficient of each part of the power transmission line at the same time interval within a period of time, and if the difference value of the maximum and minimum fault evaluation coefficients of each part is greater than a preset threshold value, carrying out monitoring. According to the invention, the early warning of the fault is realized, the fault can be rapidly positioned when the fault occurs, and the reliability and stability of the system are effectively improved.

The invention provides a digital twin hydrological station system which is characterized in that the system comprises a layered architecture system and a multi-dimensional safety protection mechanism, the layered architecture system is composed of a sensing layer, a transmission layer, a data layer, a model layer, an application layer and a display layer from bottom to top, the sensing layer comprises a heterogeneous hydrological monitoring equipment cluster, and the transmission layer comprises a heterogeneous hydrological monitoring equipment cluster. The equipment cluster is provided with a water level sensor array, a Doppler flowmeter, a spectrum water quality analyzer and an environment monitoring terminal, and total element acquisition of hydrological element data, equipment operation state data and environment data is realized; the transmission layer adopts a hybrid communication protocol stack, integrates an ultra-short wave communication module, an NB-IoT narrowband communication module and an optical fiber communication module, and constructs a multi-path redundant transmission channel, and a key data transmission channel is configured with a dynamic link selection algorithm; the data layer comprises a distributed storage architecture, adopts a mixed storage mode of a relational database cluster and an unstructured database, and is internally provided with a data cleaning engine and a spatio-temporal data fusion module.

The invention relates to the technical field of optical fiber communication, in particular to a digital twin model parameter updating method applied to an optical cable. The method comprises the following steps: collecting optical fiber laying data; performing laying structure division based on the optical fiber laying data to obtain flat structure optical fiber data and layer-stranded optical fiber data; evaluating the tensile strength of the optical cable based on flat structure optical fiber data; detecting the optical signal transmission intensity of the flat-structure optical fiber data based on the tensile property of the optical cable; performing intelligent loss compensation on the flat structure optical fiber data according to the optical signal transmission intensity to obtain signal compensation data; calculating the distribution uniformity based on the layer-stranded optical fiber data; determining optical fiber dislocation based on the distribution uniformity to obtain optical fiber dislocation data; and performing optical fiber Brillouin scattering detection based on the optical fiber dislocation data to obtain Brillouin scattering data. The accuracy and real-time performance of optical cable performance evaluation are improved based on the optical fiber communication technology, and therefore the stability and reliability of optical cable signal transmission are remarkably improved.

The invention provides an optical fiber communication line fault feedback system, which relates to the technical field of optical fiber communication fault diagnosis, and comprises a data acquisition module, a feature extraction module, a feedback module and a fault feedback module, according to the method, the attenuation rate, the reflectivity, the packet loss rate, the temperature, the humidity, the vibration signal, the electromagnetic pulse signal and the radio frequency interference signal of the optical fiber communication line are obtained; compared with the prior art, the method comprehensively considers the influence of communication related parameters and environment related parameters, achieves the comprehensive evaluation of the optical fiber communication line, and improves the evaluation accuracy of the optical fiber communication line. Therefore, the accuracy of subsequent fault diagnosis and fault classification is improved.

The invention provides a hollow-core optical fiber cable fiber breakage detection method based on a reference optical fiber and an optical cable, and belongs to the technical field of optical fiber communication. The method comprises the following steps: acquiring monitoring data of a reference optical fiber in a hollow-core optical fiber cable, and performing quality evaluation on the data to generate a signal quality comprehensive score; when the score is higher than a preset threshold value, feature extraction and dynamic weighted fusion are carried out to generate a comprehensive feature vector; outputting a fiber breakage probability by using the fiber breakage state recognition model, calculating a fiber breakage risk value through a prediction model in combination with time sequence data, and obtaining a fiber breakage risk index through a risk fusion algorithm; and finally, matching and executing a hierarchical response strategy according to the risk index. According to the invention, multi-modal data fusion, intelligent state identification and active early warning are realized, and the reliability, precision and operation and maintenance efficiency of broken fiber detection are significantly improved.

The invention relates to the technical field of health management of optical fiber communication equipment, and discloses an optical fiber connector life prediction system based on digital twinning and multi-parameter fusion, which comprises a data acquisition module, a data preprocessing module, a feature extraction module, a model construction module, a fusion analysis module and a life prediction module. According to the optical fiber connector service life prediction system based on digital twinborn and multi-parameter fusion, multi-dimensional data is formed through the data acquisition module, complete and associated data support is provided for subsequent feature extraction and service life analysis, and a digital twinborn model is constructed based on three-dimensional structure parameters and material attributes of the optical fiber connector, so that the service life of the optical fiber connector is predicted. The virtual model can accurately reflect the structural state change of a physical entity in real time, in addition, the fusion feature vector and the structural state parameter are subjected to joint analysis, a comprehensive evaluation index capable of reflecting the association of the fusion feature vector, the structural state parameter and the comprehensive evaluation index is output, an accurate multi-dimensional evaluation basis is provided for life prediction, and then the life condition of the optical fiber connector is accurately predicted.

The invention discloses an optical fiber vibration signal time identification and classification method, system and device based on a Mam-YOLOv10 neural network and a medium, and belongs to the technical field of optical fiber communication, and the method comprises the steps: obtaining OTDR signals of a plurality of targets based on an optical fiber vibration signal collection system, and carrying out the denoising of the OTDR signals; performing short-time Fourier transform on the de-noised OTDR signal to obtain a two-dimensional time-frequency diagram of the vibration signal; based on the two-dimensional time-frequency diagram, multi-scale features of the optical fiber vibration signals are extracted; and inputting the multi-scale features into a Mam-YOLOv10 neural network containing a Mama attention block to complete identification and classification of the optical fiber vibration signals. According to the method, the influence of interference fading on the pattern recognition accuracy is effectively reduced, meanwhile, the hardware complexity is reduced, the attention weight is automatically adjusted according to different fault scenes and data characteristics, and the accuracy of optical fiber fault recognition and classification is improved.

The invention relates to the technical field of intelligent communication, and discloses an end-to-end optimization method, a signal constellation geometry and probability joint shaping optimization method in an end-to-end intelligent communication system, and a communication device based on a neural network. According to the method, a transmitter is constructed by using a neural network, and a received signal passes through a two-stage equalization processing system to form an end-to-end optimization framework without assistance of a channel model. The transmitter adopts a modular design, can realize joint optimization of constellation probability shaping (PS) and geometric shaping (GS), and performs joint updating on all trainable parameters of the system based on a total loss function containing an equilibrium error and a decoding error through a back propagation algorithm. According to the invention, computing resources are effectively saved; the two-stage equalization system can accurately compensate channel damage, the realized PS and GS joint optimization can significantly improve the performance of the communication system and reduce the bit error rate, and the method has good performance advantages and practical value in an actual optical fiber communication system.

The invention provides an intelligent optical fiber distribution equipment health degree analysis method and device, and belongs to the technical field of optical fiber communication. A global LSTM model is constructed, and initialized global model parameters are issued to each intelligent optical fiber distribution equipment for local LSTM model training; and executing a parameter alignment compensation and parameter aggregation strategy on the global LSTM model by using the local training parameters obtained by each intelligent optical fiber wiring device, obtaining updated global model parameters, issuing the updated global model parameters to the local LSTM model of each intelligent optical fiber wiring device, and evaluating the current health state of each intelligent optical fiber wiring device. Through a distributed federated learning framework, local data distributed training and global model aggregation of intelligent optical fiber distribution equipment are realized, data such as optical power loss and plugging times are monitored and analyzed in real time, potential health risks are found in time, equipment damage caused by problem accumulation is avoided, and adaptability and accuracy of equipment health degree monitoring are improved.

The invention relates to the technical field of optical fiber communication, in particular to a method and a system for realizing optical fiber interconnection transmission by a high-speed serial transceiver based on an FPGA (Field Programmable Gate Array). Constructing a link feature baseline and combining with a multi-dimensional weighted quality index to drive an improved particle swarm algorithm to dynamically adjust a pre-emphasis coefficient and a receiving equalization parameter of the transceiver; signal jitter characteristics are extracted, clock data are dynamically adjusted based on the jitter characteristics and the bit error rate to recover the loop bandwidth, a forward error correction mode is dynamically switched through hysteresis threshold logic, and time delay and error correction capability are balanced; and continuously updating the baseline parameters through a closed-loop feedback mechanism to realize real-time adjustment and optimization of the quality of the optical fiber communication link.

The invention provides an intelligent flight control integrated system for a large unmanned aerial vehicle, and the system comprises a multi-mode environment sensing module, a self-adaptive flight control module, a dynamic power management module, a distributed communication architecture module, an intelligent task decision module, and a fault self-repairing system. The multi-mode environment sensing module is connected with the adaptive flight control module through a bidirectional real-time data bus, and transmits environment sensing data to the intelligent task decision module through an optical fiber communication redundant link; the dynamic power management module is connected with each function module through an intelligent power distribution matrix, and the intelligent power distribution matrix comprises a 16-channel programmable MOSFET array. Through cross-module collaborative design (perception-control-energy-communication) and physical constraint embedding (moment balance and optical fiber mechanical protection), the system has comprehensive advantages in the aspects of environmental adaptability, energy efficiency management, communication reliability, extreme fault tolerance and the like, and the performance boundary of a traditional unmanned aerial vehicle system is remarkably exceeded.

The invention discloses an optical fiber network port resource checking method and system based on big data, and the method comprises the steps: collecting the real-time data of a port, obtaining a preliminary data set, extracting key features in the preliminary data set, obtaining the abnormal change of the operation state of the port through the key features, and checking the abnormal change of the operation state of the port. Therefore, abnormal ports are identified and communication quality evaluation is carried out. The contribution degree of rate change to communication quality abnormity is further judged, a high-risk port set is obtained, a data visualization technology is applied to generate a resource checking report, the future bottleneck probability is dynamically updated, and a basis is provided for port resource optimization. According to the method and the system, the abnormal port in the optical fiber communication network can be effectively identified, the potential bottleneck can be effectively predicted, and data support is provided for port resource allocation, so that the network operation efficiency is improved, the port resources are dynamically allocated, and the communication quality is improved.

The invention relates to an electric power communication optical fiber fault monitoring and visualization method and system, and belongs to the technical field of optical fiber communication monitoring, and the method comprises the following steps: carrying out the real-time monitoring of an electric power communication optical fiber through a non-intrusive monitoring system, collecting an optical power signal in real time, and constructing an optical fiber resource database; when the non-intrusive monitoring system detects that optical power attenuation exceeds a preset threshold value, an optical time domain reflectometer OTDR is started to perform intrusive detection on an abnormal optical fiber, and an OTDR echo curve is obtained; extracting a composite feature vector of an OTDR echo curve, and identifying a fault type through a multi-stage fusion algorithm in combination with historical fault record data; according to the OTDR detection point coordinates, the optical path distance and the geographic information data, the position of a fault point is calculated, and the optical fiber topology, the position of the fault point and the fault type of the fault point are displayed in a visual interface. According to the invention, accurate fault identification and quick response are realized, and the operation and maintenance efficiency is improved.

The invention discloses a ship-shore safety connection system with efficient communication and safety protection, and particularly relates to the technical field of electric power and data connection of ships and shore bases, which comprises a medium-voltage composite optical fiber shore power cable, a dual-system electrical transmission system, a third-party linkage control center and a layered insulation monitoring module, the medium-voltage composite optical fiber shore power cable adopts a double-layer anti-torsion protective sleeve and an anti-electrostatic shielding layer, a double-system electrical transmission system is integrated with a broadband voltage self-adaptive module and a high-speed optical fiber communication repeater, the system realizes ship-shore potential difference monitoring and redundancy switching through a three-way data link, and a layered insulation monitoring module is used for positioning a fault point in real time. Besides, an environment reinforcing assembly, a multi-stage early warning mechanism and a communication line self-healing function are further arranged, the problems that a traditional system is poor in compatibility, low in communication efficiency and insufficient in safety protection are solved, and the system is suitable for efficient and safe connection between the ship and the shore base.

The invention relates to the technical field of optical fiber communication, and discloses a non-intrusive optical fiber optical power measuring system. According to the method, leakage light is generated through micro bending of an optical fiber, high-sensitivity amplification is performed on leakage light current by adopting an AD8304 logarithmic amplifier, and the measurement range of micro current is expanded in combination with an intercept adjustment technology; leakage optical signals in two directions at the micro-bend position are collected through a left-right dual-channel analog-to-digital converter (ADC), and accurate real-time monitoring of optical power is achieved through a digital processing module and a remote control module. The system comprises an optical fiber clamp module, a photoelectric conversion module, a logarithmic amplification circuit, a dual-channel ADC module and a remote control unit, and measurement is completed on the premise that normal communication of optical fibers is not affected at all. The problem that a communication link is interfered by traditional intrusive measurement is solved, the dynamic range of the measured actual optical power reaches 50dB, the measurement error is low, and a high-reliability solution is provided for performance monitoring and maintenance of an optical communication system.

The invention belongs to the technical field of quantum information, and particularly relates to a quantum entanglement and classical signal common-fiber transmission device based on a hollow-core optical fiber. According to the device, the characteristics of low loss and weak non-linear effect of the hollow-core optical fiber are utilized, the quantum entanglement two-photon pair and the classical optical signal are transmitted in the hollow-core optical fiber in a co-fiber mode through the wavelength division multiplexing technology and the polarization optimization strategy, the system can tolerate the classical signal with the higher communication rate, and the lower quantum signal bit error rate is allowed. The quantum entanglement and classical signal common-fiber transmission device designed through the method can be widely applied to the fields of quantum key distribution, quantum teleportation, quantum clock synchronization, distributed quantum calculation and the like compatible with a classical optical fiber communication system.

The utility model relates to the technical field of optical fiber sensing, optical fiber communication and optical imaging, and discloses an image transmission device for discrete array light guide signal detection, which comprises an image transmission optical cable input end connector, an image transmission optical cable output end connector and an image transmission optical cable. According to the utility model, a plurality of light guide type annunciator or sensor output tail fiber end faces can be integrated, so that centralized image acquisition and signal transmission of annunciator or sensor array output signals are realized; there is no requirement for functional performance consistency between integrated light guide type or sensors; through the image zooming-in and zooming-out functions of the image transmission optical cable input end connector and the image transmission optical cable output end connector, the size of the image transmission optical cable can be reduced, and the application scene adaptability of the image transmission optical cable is higher. The integration level of a distributed measurement system based on a discrete light guide annunciator or a sensor array can be effectively improved, the complexity of the system is reduced, and the measurement efficiency is improved; parts are composed of full-passive optical devices, and the device has the advantages of being high in anti-interference performance and high in reliability.

The invention discloses an on-line monitoring multi-main-path power optical fiber automatic switching protection system and method, and belongs to the technical field of optical fiber monitoring and diagnosis, and the system comprises a main control module, an OTDR module, an optical switch module, and a routing and Ethernet module. Wherein the OTDR module monitors optical terminal equipment in real time to obtain optical fiber communication data; the main control module processes the optical fiber communication data by adopting an FPGA (Field Programmable Gate Array), compares the processed data with a preset threshold value and generates a switching decision instruction and alarm information; the routing and Ethernet module uploads the real-time state data of the optical fiber to an upper computer; receiving and responding to the alarm information; a switching instruction generated by the FPGA is issued to the optical switch module; and the optical switch module responds to the switching decision instruction generated by the main control module and executes physical channel switching of multiple paths of optical fibers. According to the invention, stable execution of data transmission and data processing can be ensured, and the stability and rationality of optical fiber automatic switching protection are improved.

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 light protection device and method. The device comprises an optical splitter, an echo extraction module, an echo detection module and a control module, the optical splitter is connected with the echo extraction module, the echo extraction module is connected with the echo detection module, the echo detection module is connected with the control module, and the control module is connected with the optical splitter; the optical splitter is used for carrying out power distribution on main and standby lines in the optical fiber communication system according to the target splitting ratio; the echo extraction module is used for extracting echo signals of the main and standby lines; the echo detection module is used for performing signal detection processing on the echo signal to obtain a detection result; the control module is used for determining the abnormal state of the main and standby lines according to the detection result and adjusting and updating the target splitting ratio based on the abnormal state. The technical problems of poor timeliness and high energy loss of an optical fiber line protection method in related technologies are solved.

The invention discloses an isomorphic four-core hollow-core anti-resonance optical fiber for an ultraviolet band photoetching process, which belongs to the technical field of optical fiber communication, and comprises an outer cladding and four isomorphic hollow-core light guide units which are arranged in the outer cladding and are distributed at equal intervals in a rectangular array manner, anti-resonance structures are symmetrically arranged in each isomorphic hollow-core light guide unit in the vertical direction and the horizontal direction, and the anti-resonance structures enclose to form an air fiber core; the anti-resonance structure is formed by nesting a plurality of layers of circular and elliptical anti-resonance tubes. And the four isomorphic hollow-core light guide units respectively work in the wavelength ranges of 280 to 380 nm, 220 to 280 nm, 160 to 220 nm and 100 to 160 nm. The isomorphic four-core hollow-core anti-resonance optical fiber structure provided by the invention has a multi-channel transmission capability, and is suitable for multi-beam parallel transmission in a high-resolution ultraviolet lithography system.

Disclosed are systems and methods that employ distributed fiber optic sensing (DFOS) / distributed acoustic sensing (DAS) to monitor and provide real-time estimation of ice thickness on fiber optic communications facilities, and which integrate DSA data with a hybrid processing technique that combines frequency domain decomposition (FDD) and stochastic subspace identification (SSI). Aspects of our innovative systems and methods include: i) Hybrid Signal Processing Techniques; ii) Real-time, Continuous Ice Monitoring; iii) Enhanced Noise Robustness and Non-linear Dynamics Handling; and iv) Adaptability and Scalability.

The invention relates to the technical field of optical fiber communication and sensing, and discloses an optical fiber coding and positioning integrated sensing device based on frequency division multiplexing and an application method, and the optical fiber coding and positioning integrated sensing device comprises a light source module, a coupler module, a frequency division multiplexing module, a sensing optical fiber network, a signal demodulation module, a positioning sensing module and a main control unit. According to the optical fiber coding and positioning integrated sensing device based on frequency division multiplexing and the application method thereof, a light source module generates broadband continuous optical signals, a coupler module realizes optical signal coupling and separation, a frequency division multiplexing module integrates sub optical signals, and an optical fiber sensing unit of a sensing optical fiber network senses and encodes external physical quantities. The positioning sensing module realizes accurate positioning, the signal demodulation module separates sub optical signals and extracts information, the main control unit operates in a coordinated manner, processes and analyzes data and outputs a result, all the modules cooperate to form an efficient and stable monitoring system, the requirements for multi-physical-quantity synchronous monitoring and accurate position positioning in a large-scale and long-distance scene are met, and the system performance is improved.

The invention discloses a heterogeneous three-core anti-resonance optical fiber for transmission from visible light to intermediate infrared light, and belongs to the technical field of optical fiber communication. The heterogeneous three-core anti-resonance optical fiber comprises an outer cladding layer from outside to inside along the diameter of the optical fiber, a first inner cladding layer, a second inner cladding layer and a third inner cladding layer are arranged in the outer cladding layer, and a plurality of nesting pipe assemblies with the same structure are arranged in the first inner cladding layer, the second inner cladding layer and the third inner cladding layer at equal intervals in the circumferential direction. An upper air fiber core area, a lower left hollow fiber core area and a lower right air fiber core area are defined by the nesting pipe assembly. The upper air fiber core area, the lower left air fiber core area and the lower right air fiber core area respectively work in a 4m wave band, a 2m wave band and a 1m wave band, have extremely low limiting loss in the three working wave bands, and have good bending resistance performance at the same time.

The embodiment of the invention provides an optical communication assembly which is applied to the optical communication field and the optical fiber communication field. The optical communication assembly comprises an optical transmitter and a first tail fiber. The light emitter is connected with the first tail fiber. The first tail fiber and the first optical fiber are connected through a first optical port connector. The first tail fiber is a plastic optical fiber. The first optical fiber is a glass optical fiber. The optical transmitter is used for generating a first optical signal and transmitting the first optical signal to the other optical communication assembly through the first tail fiber and the first optical fiber. In the technical scheme provided by the invention, the plastic optical fiber and the glass optical fiber are combined for use, so that the noise can be reduced, and low-cost and high-quality optical communication is realized.