102 results about "Mode matching" patented technology

The invention relates to the technical field of electrical fault diagnosis, and discloses an electrical system fault diagnosis method based on multiple parameters. According to the method, multi-dimensional operation parameters of an electrical system are collected, wherein the multi-dimensional operation parameters comprise voltage waveform data, current waveform data and temperature distribution data; time-frequency conjoint analysis is carried out on the multi-dimensional operation parameters, and multi-scale electrical features are extracted and comprise steady-state feature components and transient feature components; based on a historical fault case library, performing mode matching on the multi-scale electrical characteristics to generate an initial fault type set; performing confidence evaluation on the fault types in the initial fault type set by using a dynamic weight distribution algorithm, and screening out high-confidence fault types; and according to the high-confidence fault type, a fault evolution path model is constructed, and the fault evolution path model is used for describing a time sequence of fault features.

The invention discloses a cross-channel marketing automation method and system based on real-time behavior triggering. The method comprises the following steps: capturing a user behavior event flow in real time through a front-end acquisition unit; performing real-time mode matching on the event stream by utilizing a complex event processing engine, and generating a marketing trigger signal when a preset rule is matched; dynamically selecting an optimal channel for the user based on a real-time scoring model in response to the signal; the marketing content is sent to the selected channel through the unified execution module; and finally, tracking user feedback and updating model parameters and user preferences in real time to form closed-loop optimization. The corresponding system comprises a front-end data acquisition module, a streaming event processing module, a real-time intelligent decision-making module, a multi-channel execution module and a closed-loop optimization module which are used for implementing the steps. According to the method, millisecond-level intention perception, cost and experience optimal channel intelligent decision and data-driven adaptive optimization closed loop are realized, and the problems of delayed response, extensive channel and lack of self-adaption of traditional marketing are solved.

The invention relates to the technical field of signal processing, and provides an intelligent sensing device electromagnetic interference suppression method and system based on AI identification, and the method comprises the steps: obtaining a multi-source electromagnetic signal set of a target intelligent sensing device in a preset monitoring period, and carrying out the electromagnetic interference feature extraction processing of the multi-source electromagnetic signal set, performing interference mode matching processing on the electromagnetic interference characteristic set based on a preset interference suppression model to generate an electromagnetic interference suppression strategy of the intelligent sensing equipment; the electromagnetic interference suppression strategy comprises a frequency band adjustment direction corresponding to an interference frequency band distribution characteristic, a signal gain compensation direction corresponding to an interference intensity fluctuation characteristic and an anti-interference filtering direction corresponding to an interference source correlation characteristic; and performing interference suppression operation on a signal acquisition module of the intelligent sensing equipment according to the electromagnetic interference suppression strategy so as to reduce the electromagnetic signal distortion rate of the intelligent sensing equipment.

The application discloses a double-resonance atomic clock ultra-miniature substrate integrated waveguide chamber, comprising: a substrate integrated waveguide annular gap cavity, the substrate integrated waveguide annular gap cavity is formed by longitudinal stacking of a plurality of longitudinal slit substrate integrated waveguides, the longitudinal slit substrate integrated waveguide comprises a metalized through hole and a metal microstrip line, and the longitudinal slit substrate integrated waveguide is provided with a longitudinal slit; a MEMS atomic gas chamber; a mode matching excitation structure for exciting a microwave magnetic field to the substrate integrated waveguide annular gap cavity; and an electromagnetic shielding and heating assembly arranged outside the substrate integrated waveguide annular gap cavity. The application can effectively solve the key problem that the resonant performance of a printed miniature annular gap cavity is extremely sensitive to the size change of subwavelength structure parameters, increase the processing tolerance of the ultra-miniature integrated chamber, reduce the processing difficulty and manufacturing cost of high-precision PCB through holes, and improve product yield.

The invention relates to an intelligent identification and conversion control method for a charging interface of a multi-standard charging pile in the field of new energy automobiles, and the method comprises the steps: carrying out the mode matching analysis of interface physical feature data and communication signal feature data, and obtaining a preliminary classification result of the type of a charging interface device; according to the loading result of the communication configuration parameters, obtaining a confirmation feedback signal of successful protocol switching; judging whether the load demand data conforms to a rated output power range of a charging interface device or not; according to the authorization instruction, current intensity data including a peak value and an average level and voltage level data including a fluctuation amplitude in the charging process are monitored in real time; if the current intensity data or the voltage level data exceed a preset safety threshold value, power supply connection is disconnected, and a circuit path is cut off; and generating a power-off record log containing abnormal fluctuation data and a power-off moment according to a result of disconnecting the power supply connection.

The invention relates to the technical field of measurement signal transmission, and discloses a measurement signal real-time transmission system in air-ground cooperative localization, which is characterized in that an environment signal fingerprint spectrum and a modulation depth spectrum representing environment modulation intensity are generated offline, and in a real-time stage, a mobile terminal sends a detection signal and attitude data of the mobile terminal; and the positioning correlator performs self-adaptive pre-normalization on the physical characteristics of the received signal according to the attitude data and the modulation depth map, and performs mode matching with the fingerprint map to determine the position. According to the invention, the superposition influence of the attitude change of the mobile terminal and the environmental reflection on the signal can be effectively separated; the problem that different positioning results are generated at the same position due to different flight attitudes is avoided, the system has the capabilities of signal time sequence verification and atlas timeliness diagnosis, and the measurement reliability and the system adaptability in a complex real environment are improved.

The invention relates to the technical field of intelligent transportation, and discloses a mine intelligent transportation method and system. The method comprises the following steps: performing time sequence filtering and gradient denoising on mine transportation node temperature data acquired by a thermal imaging camera to obtain a temperature characteristic matrix; identifying transportation abnormal information based on the temperature characteristic matrix; executing temperature mode matching according to the transportation abnormal information, and generating a transportation operation instruction set; performing mine channel temperature safety path planning by taking the transportation operation instruction set as a constraint condition to obtain a transportation execution scheme; after the specific position of a mine worker is positioned in real time through a thermal imaging camera, a transportation execution scheme is converted into a standardized voice instruction, the standardized voice instruction is pushed to the corresponding worker through an interphone network partition, and scheduling feedback data containing instruction receiving confirmation and execution progress are obtained in real time. According to the invention, operators are accurately positioned through thermal imaging, and partition pushing is realized in combination with an interphone network, so that the intelligent level and safety of mine transportation are improved.

This invention relates to the field of optical device technology, and proposes an end-face coupler based on the coupling of optical fiber and lithium niobate waveguide, comprising a substrate, an insulating layer, a first planar layer, a first waveguide core layer, and a second waveguide core layer. The first waveguide core layer includes a first waveguide and a first tapered waveguide, with one side of the first waveguide connected to one side of the first tapered waveguide, and the widths of the connected sides of the first and second waveguides being the same. The second waveguide core layer includes a second waveguide and a second tapered waveguide, with one side of the second waveguide connected to one side of the second tapered waveguide, and the widths of the connected sides of the second and second waveguides being the same. The first and second tapered waveguides coincide with each other in opposite directions; the side of the second waveguide away from the second tapered waveguide is mode-matched to an external optical fiber. The first planar layer and the first waveguide core layer are made of thin-film lithium niobate material, and the second waveguide core layer is a material with a refractive index higher than that of the insulating layer or a material with a periodic distribution of high and low refractive indices.

The invention provides a dual-circularly-polarized feed source assembly and a feed source system. The dual-circularly-polarized feed source assembly comprises four identical horns, a dual-polarized four-path power division and synthesis network and a T-shaped waveguide circular polarizer which are cascaded. The inner wall of the horn adopts an exponential curve structure, the dual-polarization four-path power division and synthesis network comprises a common input waveguide, a frustum mode matching waveguide cavity and four output waveguides, the T-shaped waveguide circular polarizer comprises a stepped gradient waveguide and a rectangular waveguide, the rectangular waveguide and the stepped gradient waveguide are arranged in a T shape, and the rectangular waveguide and the stepped gradient waveguide are arranged in a T shape. The plane where the wide side of the rectangular waveguide is located has a 30-degree rotation angle relative to the propagation cross section of the tapered waveguide. Compact transformation from linear polarization to circular polarization can be realized through T-shaped butt joint of the stepped gradient waveguide and the rectangular waveguide. The dual-circular polarization feed source assembly has good broadband circular polarization performance.

The invention discloses a fluid filling pipeline guided wave modal tracking method based on an optimal transmission distance. The method comprises the following steps: firstly, calculating a characteristic solution by using a semi-analytical finite element method; secondly, introducing an optimal transmission distance (EMD) in an optimal transmission theory as modal similarity measurement, measuring modal similarity by calculating the minimum physical work of kinetic energy distribution rearrangement, and combining a section geometric geodesic distance to enhance physical interpretability; meanwhile, a continuous stabilization strategy based on wavenumber prediction is introduced to suppress mismatching; and finally, realizing global optimal modal matching by using a Hungary algorithm. According to the method, modal exchange errors can be effectively eliminated, tracking robustness is kept in a complex frequency dispersion area, and meanwhile, visual graphic interpretation of modal evolution can be provided.

The invention belongs to the technical field of integrated optical devices, and discloses a compact, high-efficiency and large-bandwidth thin-film lithium niobate end face coupler for large die spots, which comprises a substrate and an insulating layer, the single-layer back taper film lithium niobate waveguide layer, the first double-layer back taper film lithium niobate waveguide layer and the second double-layer back taper film lithium niobate waveguide layer are arranged on the insulating layer; the low-refractive-index waveguide layer is arranged in front of the thin-film lithium niobate waveguide, and the thin-film lithium niobate waveguide is covered with the three-dimensional tapering low-refractive-index waveguide wrapping layer. According to the invention, the coupling efficiency and bandwidth are improved by optimizing the low-refractive-index waveguide layer and matching with the mode of a laser chip large spot; the optical mode is efficiently and compactly coupled to the second double-layer inverted-cone waveguide layer by means of the single-layer and double-layer inverted-cone thin film lithium niobate waveguide layers in cooperation with the three-dimensional tapering low-refractive-index waveguide cladding layer and the transition cladding layer.

The invention relates to the technical field of tunnel construction intelligent control, and discloses a tunnel lining construction intelligent trolley and a control system thereof. The system determines a state change time point through event listening, thereby intercepting multi-source sensor data and extracting features. The pattern matching module generates a quality difference measure by comparing a criterion with an abnormal pattern. A causal analysis framework with operation frequency as a regulation variable is innovatively introduced, the influence weight of each sensor data stream on the quality is dynamically evaluated, and key quality factors are accurately identified. And performing partition merging on the optimized feature set based on the construction waveform sequential relationship, and generating a control instruction by adopting an attention mechanism. According to the scheme, conversion from static threshold judgment to dynamic causal inference is achieved, self-adaptive control is achieved through sequential context understanding, and the quality diagnosis accuracy and the adaptability of the system to complex working conditions are improved.

The invention relates to the field of signal frequency detection in microwave photonics, and discloses a broadband instantaneous frequency measurement receiving system based on Brillouin spectrum compression, which utilizes a dual-tone pump optical carrier signal carried on an intensity modulator and an optical filter to generate a single Brillouin pump source regulated and controlled by unknown radio frequency. A stimulated Brillouin structure narrowed by an optical fiber ring cavity and a single-pumping reference source subjected to phase shift beat frequency, a signal in a 45GHz range can be compressed to a bandwidth of 2.5 MHz, and meanwhile, an original signal can be subjected to optical domain down-conversion processing by a reference source signal, so that a low-frequency signal easy to process electronically is obtained; besides, a double-fiber annular cavity design is adopted, the line width of the Brillouin resonant laser is further compressed through mode matching of interference of light waves in the cavity, test precision reduction caused by frequency spectrum compression is made up, the resolution ratio can reach + / -2.2 MHz, and finally the Brillouin broadband instantaneous frequency measurement receiving technology is achieved.

The invention relates to a power line communication transmission method, device and system, and the method comprises the steps: firstly obtaining an MIMO channel matrix of a target subcarrier in a power line communication system, then determining a quality evaluation parameter of the target subcarrier according to the channel matrix of the target subcarrier, and then determining a mode matching threshold according to the quality evaluation parameter and the mode matching threshold. And determining a diversity multiplexing mode of the target subcarrier, and finally controlling a sending end to carry out subcarrier mapping and signal transmission processing on the target subcarrier according to the diversity multiplexing mode of the target subcarrier. Namely, by dynamically evaluating the subcarrier quality and adjusting the diversity multiplexing mode in real time, the problem that the prior art cannot adapt to the rapid change of the power line channel is solved, and the method has the advantage of improving the transmission reliability and the rate adaptability of the power line communication system in the dynamic channel environment.

The invention discloses a D-type concave mirror multi-pass hundred-femtosecond laser pulse compression system and method, and belongs to the technical field of ultrafast laser, and the system comprises a mode matching module which focuses a light beam into a cavity of a spectrum broadening module, the spectrum broadening module and a chirp compensation module. The spectrum broadening module comprises a cavity filled with inert gas, a D-shaped concave mirror is fixed at each of the two ends in the cavity, the two concave mirrors are oppositely arranged and are used for realizing multi-pass focusing of light beams, and reflectors for leading the light beams into or out of the D-shaped concave mirrors are arranged at the straight edges of the two concave mirrors; inert gas is used as a nonlinear broadening medium, femtosecond laser pulses are spread back and forth between the two D-shaped concave mirrors and are focused, a self-phase modulation effect is generated through the inert gas argon, and the spectrum is broadened. The pulse energy and quality can be improved while wide spectrum broadening is achieved, and shorter femtosecond pulses are obtained.

This application relates to the field of charging pile testing, and in particular to a method and system for detecting abnormal states of charging piles based on harmonic fingerprints. The method includes: acquiring a broadband harmonic raw dataset from the output end of the charging pile during charging; based on the broadband harmonic raw dataset, extracting and structurally encapsulating full-band harmonic components categorized into three major component types within the charging pile to generate a component-level harmonic feature fingerprint set; based on the component-level harmonic feature fingerprint set, performing fault harmonic mode matching and component category determination for the current abnormal charging pile to generate a fault component category information set; based on the fault component category information set, constructing fault component location confirmation and production responsibility traceability logic, generating and outputting a fault diagnosis and traceability report set. This application, in the process of detecting abnormal states in charging piles, can locate the root cause of the fault, guide efficient maintenance, and drive the optimization of component design and procurement quality.

A device for attaching at least one optical fiber to a chip includes at least one nanowaveguide disposed on a substrate of a chip to be attached to an at least one off-chip fiber respectively. At least one oxide taper mode converter is disposed around a nanowaveguide end and in optical communication with and modally coupled to each of the at least one nanowaveguide respectively, and adapted such that each corresponding fiber of at least one off-chip fiber corresponds to a cleaved fiber end each cleaved fiber end to be fused to each oxide taper mode converter respectively to optically couple and mode match each cleaved fiber end to each of the nanowaveguide ends of each of the at least one nanowaveguide via the oxide taper mode converter by a modal coupling. A method for attaching at least one optical fiber to a chip is also described.

A wireless communication method includes: transmitting, by a first device, first information to a second device. The first information is used for determining a first reception mode matching a first transmission mode; and the first transmission mode is used for non-orthogonal transmission of a first signal on a target transmission resource, and the first reception mode is used for receiving the first signal on the target transmission resource.

The application discloses a passive optical resonant cavity mode matching method based on an additional external cavity, and comprises the following steps: establishing a resonant cavity theoretical model based on actual requirements of a required resonant cavity; the resonant cavity comprises an incident end cavity mirror and an emission end cavity mirror; the radius of collimated laser of the incident resonant cavity is determined according to the resonant cavity theoretical model; the image sensor is used to observe the light spot center of the transmitted light beam passing through the incident end cavity mirror, and the incident end cavity mirror is adjusted to be coaxial with the incident light beam; a resonant cavity is built by a partial mirror and the incident end cavity mirror to obtain an additional external cavity; the position of the incident end cavity mirror is adjusted by using the additional external cavity to realize the matching of the wavefront of the incident light beam and the surface curvature of the incident end cavity mirror; the image sensor is used to observe the resonant cavity transmission light mode image, and the position of the emission end cavity mirror is adjusted to realize the resonant cavity mode matching. The method can accurately judge the wavefront matching condition of the resonant cavity mirror surface by constructing an additional resonant cavity; the sequence of optical path adjustment is clear, and the mode matching process is simple and efficient.

The invention relates to a lamp strip output mode identification method based on a distributed voltage-controlled sampling equalization mechanism, and the method carries out the one-by-one identification of a lamp strip connected with the output ends of a plurality of color channels through the cooperation of a single voltage detection path and a time-sharing driving mode. The system collects voltage-controlled response voltage during the independent excitation period of each output end, constructs an initial voltage sampling sequence, and performs normalization processing on the sequence to form a voltage response intensity vector. The response amplitude, the response time sequence and the relative change characteristics of each channel are extracted and compared with a preset output mode standard, so that accurate identification of single-channel, double-color-temperature, RGB, RGBW or RGBCW lamp strips is realized. An identification result is written into a control logic unit in a mode coding form, and a light emitting strategy matched with the control logic unit is driven by the control logic, so that the type of the accessed lamp strip is automatically identified without manual intervention, and mode matching and output control are completed.

The present application relates to the technical field of power communication monitoring, in particular to a kind of electric power cable monitoring device and monitoring method, comprising: collecting original optical signal containing external disturbance characteristic change in multiple predetermined positions of electric power cable, signal is demodulated and separated, obtain two kinds of characteristic vectors reflecting vibration mode and temperature change. After the alignment of the two types of vectors is associated in space-time, a multidimensional monitoring tensor is generated, a hidden Markov model describing the evolution of the physical state of the cable is constructed, the state transition probability is calculated through the model, and the abnormal state sequence matching the preset fault mode is identified. According to the abnormal sequence, the time axis evolution process of the monitoring tensor is traced back. The present application can effectively separate the vibration and temperature disturbance characteristics, avoid the mutual interference of different disturbance signals, make the abnormal state identification more consistent with the actual operation law of the cable, accurately determine the occurrence position and type of the initial disturbance, and improve the reliability and positioning accuracy of the cable abnormal monitoring.

The utility model belongs to the microwave device technical field discloses a kind of microwave multilayer board intervertical interconnection circuit structure, including cavity, microwave multilayer board and radio frequency glass insulator;Microwave multilayer board is fixed in the two sides of cavity, glass insulator is set on the extension structure parallel to microwave multilayer board in cavity geometric center, and microwave multilayer board forms air coaxial structure, for being connected with microstrip circuit by bonding mode and realizing the matching transmission of microwave signal, the vertical interconnection of microwave multilayer board radio frequency circuit is completed.The utility model forms air coaxial structure between radio frequency glass insulator and microwave multilayer board to realize circuit matching, more simple than prior art using circuit mode matching.And gold wire bonding mode can realize automation assembly and improve assembly efficiency.

The application provides a wave band control method, system and medium for automatically matching industrial lighting based on variable wave bands, which comprises the following steps: setting wave band parameters based on a multi-wave band adjustable LED light source, establishing multiple light source modes based on the wave band parameters, and establishing different light source environments based on the multiple light source modes; obtaining a current light source mode, obtaining a shooting image under the current light source environment based on an industrial camera, and preprocessing the shooting image; analyzing image indexes based on the preprocessed image, analyzing the interference state of the image indexes based on environmental brightness, and obtaining image interference information; comparing the image interference information with set interference information to obtain an interference deviation rate; dynamically switching the light source mode based on the interference deviation rate, matching different wave band parameters; and judging whether the current wave band parameters meet shooting requirements by analyzing the definition of the image, so as to accurately switch different wave band parameters, realize wave band control of industrial lighting, and improve the shooting definition.

The invention belongs to the technical field of metallurgy, and particularly relates to a signal interference prevention method for automatic burning of a metallurgy hot blast stove. Comprising the following steps: S1, collecting an analog quantity signal of a field instrument, and converting the analog quantity signal into an engineering value; s2, judging whether the engineering value is in a preset normal working range or not; s3, if the engineering value is within the normal working range, outputting the engineering value for control; s4, if the engineering value exceeds the normal working range, starting a multi-dimensional interference judgment process; and S5, executing a corresponding output strategy according to a multi-dimensional judgment result. According to the method, by combining two-dimensional criteria of'time window restorative monitoring 'and'fluctuation characteristic mode matching' and introducing'multi-signal cooperative verification ', instantaneous interference and real abnormity can be distinguished at extremely high precision, and the misjudgment rate is greatly reduced.

The invention discloses a high-power high-isolation broadband orthogonal mode coupler which comprises a circular-truncated-cone-shaped coupling cavity, a mode separation cavity, a mode matching step, an annular combining waveguide and a twisted waveguide, the circular-truncated-cone-shaped coupling cavity is connected with the mode separation cavity, the circular-truncated-cone-shaped matching step is arranged in the mode separation cavity, and the mode separation cavity is further provided with four rectangular ports. The four rectangular ports are connected with the two annular combining waveguides after passing through the matching step, the annular combining waveguides are connected with the twisted waveguide after being combined, and the twisted waveguide is connected with the final rectangular waveguide output port through the matching step. According to the present invention, the electrical performance is excellent, the structure is compact, the processing and the manufacturing are easy, the operation can be performed under the megawatt power, the simulation and actual measurement results show that the linear polarization mode phase separation can be achieved, the good standing wave, isolation, insertion loss and other indexes are provided, and the important improvement of the prior art is provided.

The invention relates to the technical field of semiconductor lasers, in particular to a high-speed wavelength-adjustable narrow-linewidth external cavity laser which comprises an InP gain chip optical waveguide, the left end face of the InP gain chip optical waveguide is plated with an optical high-reflection film, and the right end face of the InP gain chip optical waveguide is plated with a first optical antireflection film; the left end face of the lithium niobate waveguide is plated with a second optical antireflection film, and the right end face of the lithium niobate waveguide is plated with a third optical antireflection film; a lithium niobate film Bragg grating waveguide is arranged on the upper end face of the lithium niobate waveguide, a SiO2 layer is arranged below the lithium niobate film Bragg grating waveguide, and a Si substrate is arranged below the SiO2 layer; the right end face of the InP gain chip optical waveguide is aligned and attached to the left end face of the lithium niobate waveguide to form an outer cavity structure; a voltage control unit is further arranged on the upper end face of the lithium niobate waveguide. Through the 1-3cm ultra-long grating and mode matching optimization, the advantages of 0.8 kHz line width, 50nm tuning range, light beam quality with M less than 1.2 and device response speed mu s level are realized.

The invention discloses a low-field NMR relaxation time rapid measurement method, and the method comprises the steps: designing an IR-bSSFP pulse sequence which comprises a 180-degree reversal pulse and an excitation pulse sequence, and enabling the flip angle of a radio frequency excitation pulse in the excitation pulse sequence to be a pseudo-random flip angle; the radio-frequency phases of the adjacent radio-frequency excitation pulses are linearly changed by a fixed phase increment; based on the IR-bSSFP pulse sequence, obtaining a component MRF signal sequence of a measured object, and simulating a magnetization vector evolution process to obtain a dictionary matrix; matching the component MRF signal with a dictionary matrix pattern in combination with a smooth constraint term to obtain corresponding longitudinal relaxation time and transverse relaxation time; the invention also discloses low-field NMR relaxation time rapid measurement equipment, which comprises a pulse sequence construction module, a dictionary generation module and a mode matching module. Multi-parameter information can be obtained through single scanning, the measurement time is remarkably shortened, the experiment complexity is reduced, and the precision and repeatability of a measurement result are improved.

The invention discloses a high-brightness optical fiber beam combining device based on multimode optical fibers and a cascading method of the high-brightness optical fiber beam combining device. The device adopts a modular framework and comprises an input module, a beam combining module, a light beam optimizing module, a mode matching module and an output module which are connected in sequence. The core of the device is that the light beam optimization module is composed of one or more cascaded multimode optical fibers with parabolic or approximate parabolic refractive index distribution, a high-order mode can be effectively inhibited and a low-order mode can be enhanced through controlled mode coupling and energy redistribution after beam combination, so that synchronous improvement of output power and light beam brightness is realized. The device and the method disclosed by the invention are compatible with single-stage and multi-stage cascade application, are compact in structure and stable in performance, can effectively inhibit a nonlinear effect, and are suitable for meeting the requirements on high-brightness laser in the fields of industrial processing, optical communication, scientific research and the like.

The invention discloses an ultra-miniature substrate integrated waveguide cavity of a double-resonance atomic clock, which comprises a substrate integrated waveguide annular space cavity, the substrate integrated waveguide annular space cavity is formed by longitudinally stacking multiple layers of longitudinal slot substrate integrated waveguides, and each longitudinal slot substrate integrated waveguide comprises a metalized through hole and a metal microstrip line, the longitudinal slot substrate integrated waveguide is provided with a longitudinal slot; an MEMS atomic gas chamber; the mode matching excitation structure is used for exciting a microwave magnetic field to the annular space cavity of the substrate integrated waveguide; and the electromagnetic shielding and heating assembly is arranged outside the annular space cavity of the substrate integrated waveguide. According to the invention, the key problem that the resonance performance of the printed micro annular gap cavity is extremely sensitive to the size change of sub-wavelength structure parameters can be effectively solved, the processing tolerance of the ultra-micro integrated cavity is increased, the processing difficulty and the manufacturing cost of the high-precision PCB through hole are reduced, and the product yield is improved.

The application relates to the technical field of semiconductor lasers, in particular to a high-speed wavelength-tunable narrow-line-width external cavity laser, which comprises an InP gain chip optical waveguide, the left end face of the InP gain chip optical waveguide is coated with an optical high-reflection film, and the right end face is coated with a first optical antireflection film; further comprising a lithium niobate waveguide, the left end face of the lithium niobate waveguide is coated with a second optical antireflection film, and the right end face is coated with a third optical antireflection film; a lithium niobate thin-film Bragg grating waveguide is arranged on the upper end face of the lithium niobate waveguide, a SiO2 layer is arranged below the lithium niobate thin-film Bragg grating waveguide, and a Si substrate is arranged below the SiO2 layer; the right end face of the InP gain chip optical waveguide is aligned and attached to the left end face of the lithium niobate waveguide, forming an external cavity structure; and a voltage control unit is further arranged on the upper end face of the lithium niobate waveguide. The application realizes 0.8 kHz line width, 50 nm tuning range and M2<1.2 beam quality through 1-3 cm super-long grating and mode matching optimization, and has the advantages of mu s level response speed of the device.