279 results about "Fibre Channel" patented technology

The invention discloses a multi-point spectrum confocal measurement method, which comprises the following steps of: transmitting broadband light to an optical fiber light-emitting aperture through an optical fiber network by using a group of broadband light sources to form multi-point irradiation; the broadband light is dispersed through a dispersion lens and is decomposed into dispersion light rays with different wavelengths, and a plurality of groups of dispersion light rays form focused multi-point light beams to irradiate different positions of the workpiece to be measured; receiving reflected light rays from the surface of the workpiece to be detected through at least three optical fiber channels of the multi-channel spectrum analysis device, and analyzing a spectrum signal of each return channel; on the basis of the spectral signals of at least three measurement points, the inclination angle of the plane of the measured workpiece is calculated by adopting the relative height difference between multiple point positions and combining the triangular geometrical relationship with the light path reflection angle; in the whole operation process, the measurement device does not need to be moved, the measurement precision and stability are kept, the method effectively avoids errors caused by a moving shaft in a traditional method, and the measurement efficiency and precision are integrally improved.

The invention relates to the technical field of optical fiber sensing, and discloses an optical fiber sensing signal adaptive demodulation analysis method for inhibiting common-mode interference, which comprises the following steps of: synchronously acquiring an original signal of a main sensing optical fiber channel and a common-mode interference signal of a reference optical fiber channel, and performing time-frequency conjoint analysis on the signal of the reference optical fiber channel to obtain a common-mode interference signal; s2, extracting an interference spectrum component containing temperature drift and light source fluctuation characteristics, constructing a hybrid adaptive filter bank which comprises a recursive least square (RLS) filter and a variable step size least mean square (LMS) filter which are connected in parallel, and dynamically adjusting a forgetting factor of the RLS filter and a step size factor of the LMS filter based on the interference spectrum component extracted in the step S2, according to the optical fiber sensing signal adaptive demodulation analysis method for suppressing common-mode interference, a parameter adjustment strategy is continuously optimized, a pure vibration signal with an output signal-to-noise ratio is improved, and the effect of accurately suppressing common-mode interference in real time is achieved.

The invention discloses a vertex measurement device and method based on a spectral confocal technology, and the method comprises the steps: transmitting a plurality of light beams through a plurality of light-emitting apertures which are arranged in a preset geometrical shape, carrying out the dispersion of the plurality of light beams into dispersion light beams with different wavelengths through a dispersion lens, irradiating the dispersion light beams to the surface of a measured workpiece, receiving reflected light, and carrying out the measurement of the measured workpiece. The reflected light is transmitted to the spectrum analysis device through a corresponding optical fiber channel; the spectrum analysis device analyzes the light intensity and wavelength of each group of reflected light and extracts spectrum data; calculating the height or space coordinate of the vertex of the surface of the workpiece according to the change condition of the spectral data of each group of reflected light rays; the processing circuit outputs the calculated vertex height or space coordinate information; according to the method, the vertex information of the workpiece can be effectively derived through ingenious spectral analysis and geometric fitting technologies, and the method has wide applicability and is particularly suitable for vertex measurement scenes of high-precision spherical surfaces, aspheric surfaces and conical surfaces.

The invention discloses a UPS (Uninterrupted Power Supply) parallel operation redundancy system and a control method thereof, and relates to the field of UPS, the UPS parallel operation redundancy system comprises a plurality of groups of UPS modules, a plurality of groups of UPS module parallel links, a monitoring unit, a control unit and a switching unit; voltage sampling points of each group of UPS modules are connected with the AD conversion module of the monitoring unit through a double-shielding coaxial line, the control unit is connected with the monitoring unit through a PCIe bus, and the switching unit receives signals output by the control unit through an optical fiber channel. Through a multi-factor coupling mechanism of the dynamic redundancy capacity distribution model, the temperature correction index and the time attenuation factor are deeply fused, real-time dynamic optimization of UPS module load distribution is realized, and performance attenuation and local overload in a high-temperature environment are effectively inhibited; and through the combined criterion of the historical fault integral and the instantaneous over-threshold, the cooperative adaptive capacity of the system to the progressive fault and the sudden load fluctuation is improved.

The invention discloses a power grid system time service method and system based on a Beidou satellite, and relates to the technical field of power grid system time service, and the method comprises the following steps: obtaining a Beidou satellite signal through a Beidou ground control center, and generating a time frequency reference signal; transmitting the time frequency reference signal to each level of node through a communication network of a power system; and deploying a Beidou time service processing module in local side equipment of the power system, processing the received time frequency reference signal, and generating a system clock signal consistent with the Beidou satellite time reference. According to the invention, triple guarantee is formed through Beidou satellite signals and a dual-channel transmission architecture, i.e., an optical fiber channel and a power line carrier channel; when any transmission channel has a fault, the redundancy switching module automatically selects an optimal path, namely a time delay deviation gt is passed; the threshold triggers switching, and after the Beidou signal is interrupted, a hierarchical timekeeping strategy (atomic clock-adjacent node synchronization-power frequency synchronization) is started.

The invention discloses a background noise body wave extraction method and device based on distributed optical fiber acoustic sensing, and the method comprises the steps: obtaining an original phase difference signal along an optical fiber channel through a distributed optical fiber acoustic sensing system, and converting the original phase difference signal into strain rate data according to system demodulation parameters; performing preprocessing such as noise suppression and frequency energy balance on the strain rate data; calculating an autocorrelation function for the preprocessed signal, and superposing autocorrelation results of a plurality of time segments; performing band-pass filtering on the superposition autocorrelation function in a target frequency band, and extracting a body wave reflection response in background noise; and in order to eliminate the influence of the zero-time pulse in the shallow layer or weak reflection signal, carrying out mean value removal processing on the extraction result along the space direction to obtain a zero-offset body wave reflection response. The method can effectively describe the discontinuity from a superficial sedimentary layer and a fracture to a deep mourhua surface and even a lithosphere, and makes up for the defects of a conventional seismic station method.

The invention discloses a multi-optical fiber bundle imaging mode dimension space conversion plasma spectrum analysis system, which is characterized in that a two-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber area array, a one-dimensional optical fiber array comprising M * N optical fiber micropores is arranged on an optical fiber linear array, and an optical fiber surface is connected by adopting M * N optical fibers according to a preset connection relation, the two-dimensional optical fiber array is converted into the one-dimensional optical fiber array, the optical grating disperses light transmitted by the optical fiber linear array, then the light is focused by the imaging lens and then is subjected to optical imaging by the CCD detector, and the spectral data conversion module converts a spectral image into a spectral data graph of each optical fiber channel. According to one-to-one correspondence of optical fibers in the two-dimensional optical fiber area array and the one-dimensional optical fiber linear array, the distribution state of elements in the plasma is reconstructed, and multi-optical-fiber sample element content detection is achieved.

The invention discloses a 32G optical fiber channel forward error correction coding and decoding device which comprises a 64B / 66B coding module, a 256B / 257B coding module, a 514b / 330b bit width conversion module, an RS coding and decoding module, a PN5280 scrambling and descrambling module, a 330b / 66b bit width conversion module, a receiving synchronization module, a 256B / 257B decoding module, a 64B / 66B decoding module and a high-speed serial transceiver. The RS coding and decoding module adds check bit information to data through coding to form a complete FEC code block, the RS coding and decoding module at the receiving end completes RS decoding according to the check bit information in combination with an RS decoding algorithm, limited errors occurring in the transmission process are recovered, and an indication signal indicating whether decoding is correct or not is output for each FEC code block. The 32G fiber channel forward error correction coding and decoding device supports forward error correction coding and decoding functions, completes a function of recovering limited errors in a data transmission process through an error correction function of RS coding and decoding, and ensures high-speed and reliable transmission of data.

This application relates to a communication method and apparatus. The method includes: A first SMF network element receives first information from a PCF network element, where the first information includes an identifier of a first dedicated data network to which a terminal device subscribes; the first SMF network element sends a first request including the identifier of the first dedicated data network to a second SMF network element that supports the first dedicated data network; the first SMF network element receives, from the second SMF network element, a first response including second tunnel information of a second UPF network element, where the second UPF network element is a UPF network element selected based on the first dedicated data network; and the first SMF network element sends second information to a first UPF network element, where the second information includes the second tunnel information and a first traffic steering rule.

A VSFF fiber optic connector has a housing with a first crimp half at a rear portion of the housing and having a fiber channel to receive optical fibers for termination in the VSFF fiber optic connector and a second crimp half separable from the first crimp half, the second crimp half being attachable to the housing at the first crimp half after termination of the optical fibers in the VSFF fiber optic connector. The first crimp half has first and second retention features to engage the second crimp half, wherein an inward facing surface of each of the first and the second retention features are continuous with the fiber channel.

The invention relates to the technical field of endoscopes, and discloses a multi-channel insertion part for an endoscope, which comprises an insertion part, a connecting cylinder arranged at one end of the surface of the insertion part in a sleeving manner, and a tip cap body arranged on one side, far away from the insertion part, of the connecting cylinder, the instrument communicating groove is formed in the bottom end of the side, close to the connecting cylinder, of the tip cap body, the instrument channel is formed in the side, located in an inner cavity of the tip cap body, of the instrument communicating groove and penetrates through the tip cap body, and the optical fiber communicating groove is formed in the bottom end of the side, close to the connecting cylinder, of the tip cap body. According to the multi-channel insertion part for the endoscope, through the arrangement of three groups of independent channels including the instrument channel, the optical fiber channel and the water return channel, a doctor can perform multiple operations at the same time without frequently replacing instruments or adjusting equipment, so that the operation efficiency is greatly improved.

The invention relates to a two-dimensional optical fiber collimator array and an optical communication system, the two-dimensional optical fiber collimator array comprises an optical fiber array, a plurality of optical fibers form a two-dimensional matrix, and the end face of the optical fiber array is subjected to one-time grinding and polishing treatment; the glass flat sheet is positioned behind the grinding and polishing end surface of the optical fiber array and is fixedly connected with the optical fiber array; the plano-convex lens array is composed of a plurality of plano-convex lenses, each plano-convex lens corresponds to one optical fiber channel in the optical fiber array and is located behind the glass plain sheet, and each plano-convex lens can be independently adjusted. According to the invention, the problems of complex manufacturing process, poor channel consistency, difficulty in system integration adjustment and the like in the traditional single-fiber collimator assembly mode are solved. Through the unique structural design, the manufacturing efficiency and the use reliability are remarkably improved while the optical performance is ensured.

The invention relates to the technical field of power systems, in particular to a remote spare power automatic switching system, which comprises a communication module, a main control module, a spare power supply module, a switching execution module and a monitoring module, and is characterized in that the monitoring module uploads monitoring data to the main control module through the communication module; a switching instruction is issued to the standby power supply module and the switching execution module through the communication module so as to realize rapid power restoration, the communication module introduces a double-path optical fiber channel as a main and standby communication channel, redundancy configuration is realized, continuity and reliability of system communication are ensured, data transmission is carried out by adopting an encryption technology, and data transmission efficiency is improved. According to the technical scheme, data are effectively prevented from being stolen or tampered in the transmission process, the security of the system data is guaranteed, the accuracy and high efficiency of data communication among the modules are guaranteed through a communication protocol and an interface, the stability of data communication and instruction transmission among the systems is guaranteed, and the use effect is better.

Methods and systems that can be used for aligning and positioning of an optical fiber are provided herein. For example, an optical fiber alignment and positioning system including a vacuum stage may be provided. The vacuum stage may include a vacuum inlet operable to be in fluid communication with a vacuum source and one or more passages extending through the vacuum stage. The vacuum stage may include an optical fiber channel. A plurality of vacuum ports may pass through the optical fiber channel. The optical fiber channel may include a directional friction surface. The directional friction surface may include a first friction factor in a first direction and a second friction factor in a second direction. The directional friction surface may contact a portion of the optical fiber and may allow movement in the second direction but resist movement of the optical fiber in the first direction.

The invention discloses a power distribution area energy storage-photovoltaic oscillation cooperative suppression method based on impedance remodeling, and belongs to the technical field of power system stability control. According to the method, the impedance characteristic of the system is scanned online in real time, the virtual impedance controller parameters of the photovoltaic inverter are dynamically optimized, and the impedance frequency characteristic of the zone area network is actively remodeled, so that the zone area network is always far away from a stable critical point, and oscillation is prevented from occurring from the source. When it is detected that the oscillation energy exceeds the standard, the system immediately triggers the energy storage device to be switched to a virtual synchronous generator mode, phase information of a plurality of energy storage units in a fiber channel synchronization cluster is used, anti-phase damping current opposite to the oscillation trend is injected, and the oscillation energy is rapidly consumed. The invention provides a double-layer suppression strategy based on impedance remodeling and energy storage cooperation, the cooperation of photovoltaic impedance active prevention and energy storage instantaneous suppression is realized, the problem that a traditional fixed parameter damper loses efficacy due to frequency drift is solved, and the operation stability of a high-proportion renewable energy power distribution network is improved.

An optical fiber distribution sub-frame including a base plate, two opposite sides of which are each provided with a mounting point position; a bracket, which is detachably mounted at the mounting point position on any side of the base plate; and an optical fiber channel tray, which is hinged to the bracket. When the bracket is mounted at the mounting point positions on different sides, the optical fiber channel tray is reversed along with the bracket. When the bracket changes position, the optical fiber channel tray connected to the bracket can be reversed together, so that the bracket and the optical fiber channel tray can be replaced from one side of the base plate to the opposite side, and after reversing, the base plate can be replaced from one rotation direction to the other relative to the optical fiber channel tray. One sub-frame can meet two different usage scenarios of left-hand rotation and right-hand rotation through disassembling and reversing, without the need to prepare two types of sub-frames, reducing stocking inventory, thereby saving time and costs. In addition, a method for reversing the orientation of the bracket and the optical fiber channel tray is as described above.

The invention relates to the technical field of space telescope calibration, in particular to a telescope pointing calibration method based on optical fiber interconnection, which comprises the following steps: providing reference light beams in different directions, enabling each lens to correspondingly receive the reference light beams by adjusting the lens pointing, splitting the reference light beams received by the lenses through an optical splitter, and obtaining a split beam; one beam is aligned and corrected through a camera, and the other beam is coupled into an optical fiber to record direction information; the calibration light beams are reversely emitted by the optical fiber through the optical switch and are emitted by the lens, each reference light beam in the known direction is reproduced, a reference light field is formed, the telescope to be calibrated is placed in the reference light field, the miss distance of each calibration light beam in the known direction on the mirror surface of the telescope to be calibrated is measured, and the pointing error is calculated and corrected according to the miss distance. The optical fiber network is used for establishing the unique mapping relation between the space direction and the optical fiber channel, miss distance measurement is carried out through dynamic time-sharing reproduction, and the problems of mechanical accumulative errors and the like existing in a traditional mechanical calibration method are solved.

The invention discloses a signal transmission method for electrical signal equipment, which relates to the technical field of electrical signal transmission, and comprises the following steps: acquiring an analog signal of a first circuit node, and converting the analog signal into a first differential signal through a differential amplification circuit; performing high-speed sampling on the first differential signal to generate a first sampling sequence, and coding the first sampling sequence into a plurality of digital signal packets based on a preset quantization threshold value; converting the digital signal packet into an optical signal sequence through a photoelectric conversion module, wherein the optical signal sequence is transmitted in an optical fiber channel according to a time division multiplexing mode; and receiving the optical signal sequence by using a photoelectric detector at a receiving end, converting the optical signal sequence into a second differential signal, eliminating time delay distortion in the second differential signal through a compensation circuit, and restoring an analog signal. According to the invention, the compensation circuit is adopted at the receiving end to eliminate time delay distortion, high-quality reduction of signals is realized, and the problems of insufficient anti-interference capability and limited transmission distance in traditional electrical signal transmission are solved.

The invention relates to a micro-fluidic chip based on a reflector light path and a preparation method of the micro-fluidic chip. The reflector light path comprises an incident optical fiber channel, an emergent optical fiber channel and a liquid drop flow channel, a first reflecting mirror runner and a second reflecting mirror runner are arranged on the two sides of the liquid drop runner, liquid metal is poured into the first reflecting mirror runner and the second reflecting mirror runner respectively, and then the liquid metal is cooled and solidified to form a first reflecting mirror and a second reflecting mirror. By utilizing a light path formed by multiple reflections, the effective absorption light path is increased, and the detection sensitivity and accuracy are improved; and the liquid drop flow channel is not bent, so that the liquid drops are not damaged, and the compatible liquid drop size range is wide.

The invention provides an endoscope which comprises a disposable passive endoscope sheath and a reusable endoscope body, the passive endoscope sheath comprises an endoscope sheath handle, an insertion part and an optical fiber, the endoscope sheath handle is arranged at the near end of the insertion part, and an endoscope body access port is formed in the endoscope sheath handle; an optical fiber channel and a camera shooting channel are arranged in the insertion part, and the lens body access port is communicated with the camera shooting channel; the optical fiber is arranged in the optical fiber channel, the near end of the optical fiber is provided with a first optical fiber connecting part, the first optical fiber connecting part is arranged on the endoscope sheath handle, the first optical fiber connecting part is used for being directly or indirectly connected with a light source, and the light source conducts illumination through the optical fiber; the endoscope body comprises a camera shooting assembly and an endoscope body handle, the camera shooting assembly is connected to the far end of the endoscope body handle, the camera shooting assembly extends into the camera shooting channel through the endoscope body access port, and the endoscope body handle is detachably connected with the endoscope sheath handle.

The invention provides a high-integration multi-channel data acquisition and processing system based on RFSoC (Radio Frequency System on Chip) and FPGA (Field Programmable Gate Array), which is characterized in that for N arrays and N * M acquisition channels, ADC (Analog to Digital Converter) data acquisition and preprocessing modules are N RFSoCs, and an ADC acquisition data scheduling module is one FPGA; the FPGA comprises two types of FIFO, namely, a clock domain crossing FIFO and a data cache FIFO, and a real-time scheduling module; the real-time scheduling module provides matched efficient data scheduling transmission strategies for the plurality of ADC data acquisition preprocessing modules based on the RFSOC, and when the clock domain crossing FIFO is non-null, the data cached in the clock domain crossing FIFO is read and written into the corresponding data cache FIFO; and when the data cache FIFO is non-empty, sequentially polling each data cache FIFO, and when the data cache FIFO is non-empty and the corresponding frame tail identifier is true, reading the data cached in the data cache FIFO and the array number and the optical fiber number of the corresponding optical fiber channel, and writing the data and the array number and the optical fiber number into the FPGA output interface for data transmission. According to the invention, the PCB area can be effectively reduced, and the system power consumption is reduced.

The invention relates to a high-speed data acquisition and storage method, system and device and a medium, and belongs to the technical field of signal acquisition and data storage, and the method comprises the steps: collecting at least one path of high-voltage probe pulse signals and 24 paths of switch probe signals in real time; attenuating the high-voltage probe pulse signal to an input threshold range of an optocoupler, and performing signal conversion and electrical isolation to generate a TTL level signal; performing micro-capacitor charging and discharging detection on the switch probe signal, and recording to obtain switch probe timestamp data; tTL level signals, switch probe timestamp data and 64-bit time reference data are packaged into data frames, and the data frames are parallel through main and standby dual-fiber channels; performing integrity verification on the data frame at a receiving end, and dynamically allocating and storing a physical address; and responding to an upper computer instruction, executing storage data export or specified block erasing operation, and exporting a data additional equipment digital signature and a storage physical address. According to the invention, the collection precision and storage security of the data in the transient event can be improved.

The invention relates to a superfine-aperture laser resection mirror, a combined suite and a using method of the combined suite. The superfine-aperture laser resection mirror comprises a rod body, an electronic flexible mirror, a laser optical fiber pipeline, an operator and a connector, two through holes are formed in the rod body in the length direction of the rod body, one through hole is used for allowing an electronic flexible lens to penetrate through, and the other through hole is used for allowing a laser optical fiber pipeline to penetrate through. According to the ultra-thin-caliber urethral resection mirror combination suite, the whole design thought is changed, a brand-new laser resection mirror structure capable of keeping the original function of the resection mirror unchanged and reducing the caliber is provided, an outer sheath is innovatively removed, an optical fiber channel is combined with a water injection function, a fistulization tube and related components are designed in a matched mode, and the laser resection mirror structure is simple in structure and convenient to use. Therefore, a stable water inlet and outlet system is constructed, the diameter of the resection mirror is greatly reduced, meanwhile, the rod body serves as the outermost layer of the whole new resection mirror structure, a traditional hard eyepiece is replaced with an electronic soft mirror, and finally the diameter of the resection mirror stretching into the urethra can reach Fr6-Fr18.

The present application relates to the technical field of optical fiber splicing boxes. Provided is a large-water-depth optical fiber splicing box, comprising a cylinder and first sealing assemblies, wherein an optical fiber channel is provided at either end of the cylinder, and the optical fiber channel comprises a large-diameter section and a small-diameter section; and the first sealing assembly comprises a V-shaped sealing unit and a locking shaft, the V-shaped sealing unit being provided with a V-shaped sealing ring, the V-shaped sealing ring being separately attached to an optical unit and the large-diameter section, a V-shaped opening of the V-shaped sealing ring facing the outer side end of the large-diameter section, the locking shaft being arranged at the outer side end of the large-diameter section, and the locking shaft abutting against the V-shaped sealing unit. In the present application, by means of providing the cylinder, the pressure bearing performance and the internal space are increased; the optical fiber channel is also sealed by means of the V-shaped sealing unit, such that the V-shaped sealing ring can be attached to the optical unit and the inner wall of the large-diameter section more tightly under an external pressure; and the locking shaft can tightly press the V-shaped sealing unit, thus solving the problem in the prior art of the pressure bearing performance and the sealing performance of an optical fiber splicing box under a large-water-depth working condition being relatively poor.

The passive conveyor safety protection system with the hot standby function comprises a positioning type optical fiber host, optical fibers and optical fiber type protection devices, the positioning type optical fiber host is provided with two optical fiber channels, the two optical fiber channels are each internally provided with one optical fiber, and the two optical fibers are connected with the optical fiber type protection devices installed on the two sides of a conveyor respectively. The tail ends of the two optical fibers are welded; when the optical fiber type protection device gives an alarm, the driving optical fiber bends and twists in the optical fiber type protection device. The optical fiber protection device has the advantages that the optical fiber protection device and the optical fiber do not need optical fiber welding or plug connection, and optical fiber laying and optical fiber protection device installation do not conflict with each other; real-time broken fiber detection is carried out, and an alarm signal is output in real time when the fiber is broken; the system has a hot standby function, and can still be used when one path is broken.

The invention discloses a signal extension device, a USB optical fiber extender and a method, and relates to the technical field of data transmission, the signal extension device comprises a USB protocol identification module, a processing module and a first output module which are electrically connected in sequence; the first signal extension device is electrically connected with the transmitting equipment; the USB protocol identification module is used for distinguishing a protocol version of a USB signal sent to the first signal extension device by the sending equipment; the processing module is used for processing the USB signals of different protocol versions and forwarding the USB signals to the first output module; and the first output module is used for transmitting the USB signal processed by the processing module to the second signal extension device through the optical fiber channel, and the second signal extension device carries out signal separation and signal conversion on the USB signal transmitted through the optical fiber channel to obtain a USB signal and transmits the USB signal to receiving equipment. According to the invention, the stability and transmission efficiency of the USB signal through the optical fiber extension link are improved.

A downhole system may include a plurality of conduits configured to interconnect, via at least one stab-in connection, to form at least one fiber channel extending along a portion of a wellbore. The downhole system may also include at least one fiber optic line configured to extend through at least a portion of the fiber channel from a surface position to a downhole position. Further, the downhole system may include a plug secured to leading end of the fiber optic line. The plug is configured to move along the at least one fiber channel in response to fluid pressure in the at least one fiber channel to drive the leading end of the at least one fiber optic line along the at least one fiber channel from the surface position to at least the downhole position.

The invention relates to the technical field of optical communication, in particular to a multi-core optical fiber fan-in and fan-out device and a processing method thereof. The multi-core optical fiber fan-in and fan-out device comprises a multi-core optical fiber insertion core piece, a multi-core optical fiber, a plurality of single-core optical fibers and a plurality of three-dimensional miniature optical path elements. A plurality of optical fiber channels are arranged in the multi-core optical fiber insertion core part, the multi-core optical fiber and the single-core optical fibers are inserted into the optical fiber channels respectively, and the end faces of one ends of the multi-core optical fiber and the single-core optical fibers extend out of the optical fiber channels; each fiber core of the multi-core optical fiber is connected with the fiber core of each single-core optical fiber through the three-dimensional micro optical path element, and optical interconnection between the fiber core of the multi-core optical fiber and the fiber core of the single-core optical fiber is realized through the three-dimensional micro optical path element, so that a fan-in and fan-out function is realized; the three-dimensional micro optical path element is directly processed on the end face of each fiber core in a two-photon polymerization processing mode. According to the fan-in and fan-out device provided by the invention, the loss of each channel is uniform, secondary coupling alignment is not needed, the processing difficulty is low, and the efficiency is high.

The invention discloses a distributed optical fiber-grating-based rockburst test system and method, solves the problem that in the prior art, only strain parameters are simply obtained in a rockburst test, and has the beneficial effects of accurately simulating rockburst and obtaining related parameters of the rockburst. According to the specific scheme, the rockburst test system based on the distributed optical fiber-grating comprises a test device, the test device comprises a vibration table, and the vibration table supports a supporting box body; the rock sample is provided with an optical fiber channel, and the distributed optical fiber penetrates into the optical fiber channel; the vibration table, the stress applying component and the drilling disturbance component are respectively connected with the control unit; the monitoring unit is connected with the distributed optical fiber and the grating optical fiber; the monitoring unit sends monitored data to the control unit, and the control unit judges when rockburst is triggered and obtains stress change, elastic strain energy release amount and strain abrupt change time difference at the moment of rockburst when the rockburst occurs.

The present invention relates to a microchannel type pressure-vibration composite optical fiber F-P sensor and a preparation method thereof. The sensor includes a first structural layer, a second structural layer, and a third structural layer. The third structural layer includes a silicon wafer, on which a microchannel group, a water inlet hole, and an optical fiber channel hole are provided. The water inlet hole penetrates through the silicon wafer and is communicated with the microchannel group. The second structural layer includes a glass sheet, and a plurality of cavity holes and optical fiber channel grooves are provided on the outer peripheral edge of the glass sheet. The optical fiber channel groove is communicated with a part of the cavity holes. One side of the glass sheet is attached to one side of the silicon wafer so that one end of the cavity hole is communicated with the outer periphery of the microchannel group. The first structural layer includes a silicon layer diaphragm, and one side of the silicon layer diaphragm is attached to the other side of the glass sheet to seal the other end of the cavity hole so that the cavity hole forms an F-P cavity. A mass block is attached in a part of the F-P cavity. In the present invention, the microchannel group is communicated with the cavity. When water enters the microchannel group through the water inlet hole, the air in the cavity at one end of the microchannel group is compressed, and the pressure increases, reducing the pressure difference inside and outside the cavity.