97 results about "Optical spectrum analyzer" patented technology

The present invention relates to the technical field of optical fiber sensing. Disclosed are a multi-core grating sensor and a manufacturing method therefor, and a permafrost monitoring method. The multi-core grating sensor comprises a multi-core optical fiber grating, a strain gauge structure, and a demodulator, and the multi-core optical fiber grating comprises four uniformly and symmetrically distributed single-mode optical fibers, a cladding layer wrapping the four single-mode optical fibers, and a coating layer located between the single-mode optical fibers and the cladding layer; the strain gauge structure is attached to the outside of the multi-core optical fiber grating by means of glue bonding; and the demodulator is used for monitoring the dynamic change of the wavelength of the multi-core optical fiber grating, the demodulator comprises a broadband light source and a spectrum analyzer, an incident end of the multi-core optical fiber grating is connected to the broadband light source by means of the single-mode optical fibers, and an exit end thereof is connected to the spectrum analyzer by means of the single-mode optical fibers. Also disclosed in the present invention is a permafrost monitoring method. By means of comprehensive analysis and demodulation of fiber core wavelength variation amounts of a plurality of single-mode optical fibers on a single multi-core optical fiber grating, simultaneous measurement of multiple parameters is achieved, and the permafrost monitoring accuracy is improved.

The invention discloses a temperature and hydrogen concentration dual-parameter synchronous detection system and method, and the system comprises an ASE broadband light source, the output of the ASE broadband light source is divided into two paths through a coupler, one path enters a first circulator, the other path enters a second circulator, the output of the first circulator enters a first FBG sensor, the output of the second circulator enters a second FBG sensor, and the output of the first FBG sensor enters a second FBG sensor. The two FBG sensors are arranged in the gas chamber, the first FBG sensor and the second FBG sensor are provided with FBG topological optical fiber structures with different working wavelengths and have temperature sensitivity and gas selective response, and reflected signals of the two FBG sensors are coupled to one path through the dual-channel wavelength division multiplexer and are sent to the spectrum analyzer for wavelength demodulation. The temperature sensitivity and the gas selective response are integrated in the same sensing unit by utilizing the wavelength coding characteristic of the fiber bragg grating, so that precise decoupling and real-time output of double parameters are realized, and the detection efficiency and the data consistency are improved.

The invention discloses an intelligent bone fracture plate integrated with an optical fiber Fabry-Perot sensor and a healing monitoring method. The system comprises an intelligent bone fracture plate module, an in-vitro detection module and a data analysis module. The intelligent bone fracture plate module mainly comprises a bone fracture plate body, a diaphragm type optical fiber Fabry-Perot sensor packaged in a U-shaped groove in the bone fracture plate, and a subcutaneous coupling capsule connected through a leading-out optical fiber. The sensor converts mechanical strain of the bone fracture plate into optical signal change of the Fabry-Perot cavity. The in-vitro detection module is in wireless optical coupling with the subcutaneous coupling capsule through an external read-write equipment head of the in-vitro detection module, probe light is emitted, interference light signals are received and reflected, and the strain of the bone fracture plate is calculated through a spectrum analyzer / detector. And the data analysis module converts the strain data into a key load sharing ratio. By monitoring the trend that the ratio gradually decreases from the postoperation along with time and comparing the trend with a preset clinical threshold value, objective, quantitative, dynamic and non-invasive monitoring of the fracture healing process is achieved.

This invention discloses a method and system for measuring the frequency response of an electro-optic modulator based on a spectral analyzer. The system includes a laser, a 95:5 single-mode fiber splitter, an optical power meter, an electro-optic modulator, a control power supply, an RF signal generator, and a spectral analyzer. The measurement method includes the following steps: calculating a calibration factor to correct optical power drift through optical path splitting, driving the modulator by applying several discrete single-frequency RF points, and measuring the carrier power P0(f) using the spectral analyzer. i ) and the first-order sideband power P1(f i ), and determined by the power ratio R(f) i )=10 (P1‑P0) / 10 Combining the Jacobi–Anger expansion / Bessel function relation, the phase modulation index β(f) is solved by inverse solution. i Then, the phase transfer function H(f) at each frequency point is calculated and fitted. i The continuous frequency response S of the modulator is obtained. 21 This invention simplifies the testing process, reduces reliance on high-speed photodetectors and vector network analyzers, and enables high-precision electro-optic response testing of electro-optic modulators at high frequencies.

The invention relates to the technical field of spectrum analyzers, and discloses a rotary adjustment type spectrum analyzer which comprises a spectrum analyzer body. The fixed cover is arranged, the driving gear rotating in the fixed cover is meshed with the half gear, the angle of the display screen connected with the fixed cover can be accurately adjusted, and different observation requirements are met; a guide roller in the rotation center of the half gear is attached to an ejector rod on the back face of the display screen, when a pressing rod in the center of a driving gear is pushed, a push rod can be driven to enable a friction plate to be separated from a fixing base, the half gear is unlocked, the guide roller can be driven by a synchronous plate to move synchronously, and the display screen is guided to retract inwards through a slope on the guide roller. The risk that the display screen, the fixing cover and other components are scratched in the later angle adjusting process is fundamentally reduced; and after adjustment is completed, the friction plate is attached to the fixing base again, the position of the half gear can be stably positioned, it is ensured that the display screen is kept at the adjusted angle, and adjustment convenience, the protection effect and positioning stability are all considered.

The invention discloses a high-precision spectrum analysis and detection device for bioengineering inspection, and belongs to the technical field of bioengineering inspection, the high-precision spectrum analysis and detection device comprises a high-precision spectrum analyzer main body, and the front side of the high-precision spectrum analyzer main body is provided with an inspection cavity; according to the technical scheme, through the arrangement of the electric push rod, the base plate, the motor, the rotating seat, the top plate and other structures, multiple groups of sample detection boxes can be directly arranged around the top plate in bioengineering inspection, then a worker can adjust the distance between a sample and an infrared light source through the electric push rod, and then the motor is controlled to drive the detection boxes on the top plate to rotate; in the rotating process of the detection box, spectrum detection analysis can be sequentially carried out on biological samples in the detection box passing through the infrared light source, the samples do not need to be repeatedly replaced by personnel, the detection work of multiple groups of samples can be completed at a time, the working efficiency is improved, and the operation is simplified; and the detection accuracy is effectively prevented from being influenced by long-term external environment of the sample.

An optical signal amplifier using a praseodymium doped fiber is described. The optical signal amplifier includes a signal laser, a first optical isolator, a second optical isolator a pump laser, a wave division multiplexer, a silica based glass optical fiber, a second optical isolator, an optical power meter, and an optical spectrum analyzer (OSA). The signal laser generates a signal laser beam. The pump laser generates a pumped laser beam. The wave division multiplexer combines the signal laser beam and the pumped laser beam and generates a combined laser beam. The silica based glass optical fiber has a preferred concentration of praseodymium ions of about 50×1024 ions / m3 and a length of about 5.7 m. The silica based glass optical fiber receives the combined laser beam, amplifies photons in the combined laser beam, and generates an amplified laser beam.

The present application relates to the field of spectral analysis instrument, specifically relates to a kind of DMD-MCP ultraviolet imaging system and distortion correction method.The distortion correction method is generated by lattice mask, collects MCP distortion image, extracts feature points, and is fused nonlinear polynomial modeling and neural network model to carry out joint correction, realizes two-stage processing from rough correction to fine correction.The present application fills the blank of DMD-MCP ultraviolet imaging system space mapping and geometric distortion correction, significantly improves spectral quantitative precision, adapts high-end spectrometer, can be extended to X-ray, electron imaging and other scenes, and engineering value is high.

The application belongs to the technical field of optical fiber preparation automation, and specifically discloses a femtosecond laser-based optical fiber grating automatic processing and sorting system and method. The system comprises a sorting unit, a processing unit and a detection unit. The sorting unit comprises a feeder for automatically feeding optical fibers during processing, a winding machine connected with the feeder through an optical fiber and used for packaging and winding the finished optical fibers, and an industrial robot used for sorting the packaged finished optical fibers. The processing unit is arranged between the feeder and the winding machine and is used for processing optical fiber gratings. The detection unit comprises a test light source, an optical circulator, an optical spectrum analyzer and a loss module. The optical circulator is connected with the test light source, the optical spectrum analyzer and the optical fiber on the feeder. The loss module is arranged between the processing unit and the winding machine and blocks the propagation of test laser emitted by the test light source in the optical fiber through a bent optical fiber. The control unit is in communication connection with the processing unit, the sorting unit and the detection unit and is used for realizing optical fiber grating automatic processing and sorting.

The present application relates to the technical field of optical communication transmission, and discloses a path planning method based on an optical communication network, comprising the following steps: step one: connecting the optical communication network and an optical spectrum analyzer through a network, acquiring management data of a topology structure and signal monitoring data of all links, and classifying and forming a structure data set and a transmission data set, and real-time sensing a network state; step two: real-time analyzing link transmission bottlenecks of different topology structures, generating corresponding link bottleneck indexes, and efficiently positioning the link bottlenecks; step three: real-time analyzing the aggregable space of spectrum resources of the optical communication network, generating corresponding elasticity indexes, and directly reflecting the continuity and size of the available space of the spectrum resources; step four: setting bottleneck threshold values and elasticity threshold values with fixed numerical values, combining the link bottleneck indexes and the elasticity indexes, distinguishing transient shocks and persistent overloads, outputting corresponding path planning methods, and intelligently integrating high link utilization.

The application discloses a kind of laser cleaning machine intelligent rust removal method, device, equipment and system, it is related to laser rust removal field, method includes: by controlling camera to the surface of target metal piece photographing obtains metal surface image, rust area is identified and rust rough grade is determined to image analysis;Utilize sensor to collect the environmental parameter of target metal piece application scene, calculate out environmental influence index total;Spectrometer is detected simultaneously to rust area by control, and spectrum detection data is obtained, rust type is determined and chemical composition complexity index is obtained by analysis;Chemical composition complexity index, rust rough grade, rust type and environmental influence index are weighted and summed to calculate out comprehensive rust degree index by synthesis;According to comprehensive rust degree index, the laser cleaning parameter of laser cleaning machine is determined, and laser cleaning machine is controlled to the rust area of target metal piece and carries out laser rust removal.The application can effectively improve the rust removal effect of metal rust.

The invention relates to the technical field of hyperspectral remote sensing spectral analysis, in particular to a full-spectrum splicing high-resolution imaging system and method for a hyperspectral analyzer, and the method comprises the steps: determining a slit switching sequence through an acquisition module; the dynamic collimation module feeds back an aberration result; the adaptive dispersion module carries out wavelength calibration; the high-precision imaging module predicts imaging mirror parameters; the real-time compensation module adopts a Kalman filtering algorithm to predict the defocus compensation amount and executes nanoscale displacement compensation through a piezoelectric ceramic driver; the intelligent splicing module adopts an SIFT feature matching algorithm, a generative adversarial network and a reinforcement learning algorithm to realize image registration and fusion; the cooperative control module generates control signals through Monte Carlo simulation and a Bayesian optimization algorithm to coordinate all the modules. According to the invention, the problems of insufficient spectral resolution, difficulty in data splicing and low real-time measurement efficiency caused by fixed hardware parameters in a wide-spectrum spectral imaging system are solved, and full-spectrum high-resolution imaging is realized.

The invention discloses a bionic flexible touch sensor based on optical fiber interference and a preparation method thereof. The sensor comprises a Mach-Zehnder interference type optical fiber sensor formed by dislocation welding of single-mode optical fibers, and a bionic flexible packaging structure used for bearing the optical fiber sensor. The bionic flexible packaging structure adopts bionic octopus sucker array structures which are symmetrically arranged up and down to form a sandwich type flexible structure, the optical fiber interference sensor is arranged in the middle layer of the bionic flexible packaging structure, and supporting optical fibers are arranged on the two sides of the bionic flexible packaging structure to provide mechanical supporting and limiting effects; when external tactile force acts on the bionic octopus suction cup array, the bionic flexible packaging structure deforms synergistically, the deformation is effectively transmitted to a medium area around the optical fiber through the porous structure, the effective refractive index of the medium is changed, and therefore the phase difference of the optical fiber Mach-Zehnder interference structure is modulated, and the optical fiber is obtained. The interference light intensity change is shown in the spectrum analyzer, and optical detection of weak touch force is realized. According to the invention, the structure is simple, the flexibility is high, the anti-electromagnetic interference capability is strong, the preparation process is based on a conventional forming method, the feasibility of array and batch preparation is realized, and the application prospect in the fields of flexible touch sensing and fine force detection is good.

The application discloses a kind of induction logging instrument systems and acquisition method based on plasma optical fiber sensor, including ground current emission source and at least one well in current emission source and well in receiving acquisition device, the well in receiving acquisition device is connected with the optical system of induction signal detection being arranged on ground, the optical system is composed of sequentially connected broadband light source, polarizer, polarization controller, fiber optic circulator and spectrum analyzer, the fiber optic circulator is connected with well in receiving acquisition device and spectrum analyzer respectively, at least two plasma resonance optical fiber sensing probes are arranged in the well in receiving acquisition device. There is no mutual interference or crosstalk between plasma resonance optical fiber sensor, optical fiber sensor and emission power supply and antenna, and it is not easy to be disturbed by environmental electromagnetic noise, and multi-channel large data high-speed real-time transmission can be realized by using armored photoelectric composite cable connected with each well in receiving acquisition device.

The embodiment of the application discloses a kind of calibration method and system of coherent optical module, equipment, storage medium, in calibration method, first by target reference light source to target coherent optical module emit first optical signal, after target coherent optical module receives the first optical signal, the optical signal-to-noise ratio of the first optical signal is measured, and its measurement result is sent to the processor of calibration system, so that the processor obtains the calibration parameter of target coherent optical module according to the difference between the first measured optical signal-to-noise ratio of target coherent optical module and the pre-stored reference optical signal-to-noise ratio.Due to the calibration process does not need to use spectrum analyzer, so as to avoid the problem of low calibration efficiency caused by the low data processing efficiency of spectrum analyzer, realize the technical effect of improving the calibration efficiency of coherent optical module.

The utility model discloses an efficient cleaning device for a lubricating oil spectrum analyzer rectangular tube, which comprises a cleaning box, a mounting box arranged on one side outside the cleaning box and a cleaning cylinder arranged inside the cleaning box, a cavity is arranged inside the cleaning box, and a movable cover plate is arranged on one side, far away from the mounting box, of the cleaning box. A mounting plate is arranged at the upper end of the inner side of the cleaning box, a plurality of cleaning nozzles and drying nozzles are arranged on the lower surface of the mounting plate, one side of the outer portion of the cleaning cylinder is connected with the inner wall of the cleaning box through a telescopic rod, and the other side of the outer portion of the cleaning cylinder is fixedly connected with the movable cover plate; a fixing mechanism is mounted in the cleaning cylinder, a communicating pipe is mounted at the bottom of the cleaning cylinder, and an electromagnetic valve is mounted on the communicating pipe; a control box, a water pump and an air pump are arranged in the mounting box, and the rectangular pipe cleaning device has the advantages that the cleaning effect is effectively improved, and the working efficiency of rectangular pipe cleaning is greatly improved.

A spectrometer device comprises at least a first light source (10) emitting light in a first illumination wavelength range and at least a first spectral analyzer (26, 26a) adapted to analyze light in a first analyzer wavelength range. A dichroic first illumination mirror (16, 16a) is provided to reflect light in the illumination wavelength range from the first light source (10) towards a target (12). A dichroic first analyzer mirror (18, 18a) reflects light in the analyzer wavelength range that returns from the target towards the spectral analyzer (26, 26a). The first illumination mirror (16, 16a) is transmissive for light in the first analyzer wavelength range and the first analyzer mirror (18, 18a) is transmissive for light in the first illumination wavelength range. The first illumination mirror (16, 16a) intersects the first analyzer mirror (18, 18a).

The invention relates to the technical field of industrial automation and chemical engineering data processing, in particular to a lime milk impurity removal system and method for calcium silicate production, and the method comprises the steps: collecting data in real time through a data collection module to generate a time sequence multi-dimensional feature vector; the impurity dynamic deduction module simulates an impurity movement track based on a three-dimensional geometric model and outputs prediction data; the multi-target collaborative optimization decision-making module generates a Pareto optimal process scheme by taking the vibration frequency of a vibrating screen, the retention time of a sedimentation tank, the aperture combination of a jumping screen and the adding amount of a flocculating agent as decision variables; the dynamic scheduling module converts the scheme into an executable instruction to control the operation of the physical equipment device; and the virtual-real interaction closed-loop correction module generates a deviation signal by comparing measured data and predicted data of the optical detection unit and the spectrum analyzer, and updates model parameters and weight coefficients by using a federated learning mechanism to form closed-loop correction.

This invention relates to the field of materials analysis technology, specifically to a calibration and measurement device and system for the carbon content of power plant fly ash based on an industrial robot. The device includes an automatic compaction sampling mechanism, a composite probe, a pressure sensor, a spectrometer, and a main control unit. The active unit is electrically connected to the automatic compaction sampling mechanism, the pressure sensor, and the spectrometer, and performs the following actions: controlling the automatic compaction sampling mechanism to drive the composite probe vertically into the surface of the fly ash to be measured; when the contact pressure on the fly ash surface reaches a preset compaction threshold during the pressing process, controlling the automatic compaction sampling mechanism to enter a steady-state holding period; acquiring infrared spectral data and electrical parameter data reflecting the driving characteristics during the steady-state holding period to construct a real-time monitoring queue; matching the real-time monitoring queue with a calibration reference queue; and finally identifying the calibration trigger moment and performing fly ash carbon content measurement model calibration. This invention improves the accuracy of calibration trigger moment identification and measurement model calibration.

This invention provides a terahertz spectroscopy in-situ detection system and method for monitoring material phase transition processes, belonging to the field of spectroscopic analysis instrument technology. The system includes a terahertz spectroscopy detection system and a heated and temperature-controlled sample stage. The heated and temperature-controlled sample stage is electrically connected to a temperature control and feedback module, which monitors and adjusts the temperature of the heated and temperature-controlled sample stage in real time. Terahertz transparent windows of different specifications can be placed on the heated and temperature-controlled sample stage. This system is used to acquire the terahertz frequency domain spectral information of a sample in real time during the sample's phase transition process, and to perform terahertz spectral detection of the phase transition process under different temperature conditions. It achieves in-situ, continuous terahertz spectral detection of the sample under controlled temperature conditions, and provides stable and repeatable terahertz spectral observation of the material phase transition process under dynamic heating, isothermal, or variable temperature conditions, maintaining sufficient detection sensitivity and signal-to-noise ratio even with trace sample conditions.

The application provides a kind of welding process method of cyclone nozzle shell assembly, it is related to welding technical field, including the following steps: adopting spectral analyzer to verify shell and nozzle material, on its surface treatment;By the positioning fixture of the shaft center positioning rod and inner fixed plate and radially compact radial force plate, shell and nozzle are clamped and fixed;Adopting multilayer multichannel digitized pulse MIG welding;Shell and nozzle assembly after welding are placed into aging furnace;The shell and nozzle assembly after welding are detected.The shaft center positioning rod, inner fixed plate and radially compact radial force plate realize the high-precision positioning of shell and nozzle, accurately adjust radial force plate, strictly control coaxiality to ≤0.05mm, the precision is improved, the stability of medium flow is greatly enhanced, solves the positioning precision difference when positioning by using conventional fixture, shell and nozzle coaxiality deviation exceeds 0.15mm, causes the problem of medium flow disorder, separation efficiency decline.

The application discloses a kind of molecular imprinting micro-nano fiber interference type plasticizer sensor, sensing method and manufacturing method, and the sensor includes broadband light source, incident optical fiber, polydopamine molecular imprinting film layer coated micro-nano fiber cascade interferometer, outgoing optical fiber and spectrum analyzer;Broadband light source is connected with the left end of incident optical fiber, the right end center of incident optical fiber is connected with the left end of micro-nano fiber cascade interferometer, the right end of micro-nano fiber cascade interferometer is connected with the left end of outgoing optical fiber, and the right end of outgoing optical fiber is connected with spectrum analyzer;Micro-nano fiber cascade interferometer is used as the sensing probe for measuring plasticizer concentration.The plasticizer sensor of the application is simple to manufacture, compact structure, has greater advantage in sensitivity in the field of biochemical sensing, and different sensitivity refractive index sensors can be obtained by controlling the diameter of multi-core optical fiber.

The invention provides a substrate deformation measurement system based on a fiber bragg grating (FBG) and a self-adaptive layout method thereof. The substrate deformation measurement system comprises an FBG sensor network, a data acquisition module, a signal preprocessing and data analysis processing module and a visual interface, the FBG sensor network comprises a measured substrate and a fiber grating string; the data acquisition module comprises a tunable broadband light source, an optical isolator, an optical circulator, a signal transmission optical fiber, a spectrum analyzer and a corresponding demodulation algorithm; the signal preprocessing and data analysis processing module comprises hardware equipment and computer software; and the visual interface uses Labview to write a front-end interface, and is used for performing three-dimensional real-time display on a substrate shape reconstruction result and realizing an alarm function for special situations. According to the invention, through fusion of real-time data and a prior model, focusing monitoring and resource optimization configuration of a key area are realized, and the problems of high calculation complexity, low data processing efficiency and the like in a traditional distributed fiber grating morphology sensing technology are solved.

An optical sensor system includes a light source and an optical fiber configured to transmit wavelengths of light received from the light source. A Bragg grating is disposed in the optical fiber. The Bragg grating is configured to reflect a wavelength of the wavelengths of light based on a force applied to the optical fiber that corresponds to an intraocular pressure (IOP). An optical spectrum analyzer is configured to detect the wavelength.

The invention discloses an optical fiber-based IgG protein concentration detection method. A used device comprises a broadband light source, a single-mode optical fiber, a polarization controller, a flow cell, a TFBG-SPR sensor and a spectrum analyzer. Firstly, light with the wavelength range of 1420-1620 nm is emitted by a broadband light source, the polarization state of the light is adjusted to a P state through a polarization controller, then the light is input into an AuNPs / 11-MAA / rabbit anti-human IgG modified sensing probe, and finally a spectrum is displayed on a spectrum analyzer. Rabbit anti-human IgG on the surface of the TFBG can be combined with human IgG to cause change of the refractive index, drifting of a transmission spectrum is shown on a spectrum analyzer, and rapid, accurate and trace detection of the IgG concentration is realized by comparing the relationship between the concentrations of different IgG solutions and the drifting of the transmission spectrum. The invention provides a novel method which is simple in structure, high in accuracy and quick in response for measuring the concentration of IgG, and has great application potential.

The invention provides an exosome quantitative detection method based on TFBG-SPR (Total Fiber Bragg Grating-Surface Plasmon Resonance). The detection device is composed of a broadband light source, a single mode fiber, a polarization controller, a TFBG-SPR exosome sensor, a detection sample pool and a spectrum analyzer. The detection principle can be summarized as follows: light emitted by the broadband light source is transmitted to the polarization controller through the single-mode optical fiber, incident light is modulated to be in a P polarization state at the position of the polarization controller, P-state light is transmitted to the TFBG-SPR exosome sensor, the sensor is fixed in the detection sample pool, and finally an output light signal is presented on the spectrum analyzer in a transmission spectrum mode. In the detection process, an exosome is selectively captured by a CD63 antibody layer on the surface of the TFBG-SPR exosome sensor, so that the refractive index of the surface of the TFBG-SPR exosome sensor is changed, and an output transmission spectrum drifts. By comparing the relationship between the concentrations of different exosome solutions and the transmission spectrum drift amount, the portable, rapid and high-sensitivity quantitative detection of the exosome is realized. And meanwhile, directional measurement of different types of exosomes can be realized by changing the types of detection antibodies on the surface of the sensor. The invention provides a novel method which is high in sensitivity, simple to operate and rapid for quantitative detection of the exosome, and has wide application value in the aspects of cancer prediction, diagnosis and prognosis and other biomedical detection.

The invention discloses a magnesium-aluminum alloy two-way alternate casting forming method. The method comprises the steps that S1, alloy smelting and component regulation and control are conducted; s2, alternately setting casting parameters and casting for the first time; s3, alternate casting and interface control; s4, solidifying, cooling and demolding the casting; molten liquid components are monitored in real time through a spectrum analyzer in combination with a specific component detection function, and it is ensured that magnesium and aluminum alloy molten liquid components meet design requirements; the interface temperature is accurately controlled between two layers of alloy liquidus through temperature control, and good metallurgical bonding between magnesium-aluminum alloy layers is achieved; according to the solidification characteristics of the two alloys, a cooling speed function is set, internal stress concentration is effectively inhibited, and the occurrence rate of cracks, shrinkage cavities and other defects is reduced; by means of the function model of the total argon injection amount and the injection rate, the argon consumption and the argon injection rate are accurately calculated and controlled, hydrogen and inclusions in molten liquid are efficiently removed, argon waste is avoided, and the purity and the production economy are both considered.

The invention discloses a trace lead ion concentration detection method based on a TFBG-SPR integrated MXene film. A used device comprises a broadband light source, a single-mode fiber, a polarization controller, a flow cell, a TFBG-SPR sensor and a spectrum analyzer. Firstly, a broadband light source emits light with the wavelength range of 1420-1620 nm, the polarization state of the light is adjusted to a P state through a polarization controller, an MXene functional film is deposited on the surface of a TFBG-SPR sensor and used for being combined with lead ions in a solution to be detected, and finally a spectrum is formed on a spectrum analyzer; the MXene functional film on the surface of the TFBG can be combined with the lead ions to cause the change of the refractive index, the change shows the drifting of the transmission spectrum on a spectrum analyzer, and the rapid, accurate and trace detection of the concentration of the lead ions in the water environment is realized by comparing the relationship between the concentrations of different lead ion solutions and the drifting of the transmission spectrum. The invention provides a novel method which is simple in structure, high in accuracy and quick in response for measuring the concentration of the lead ions, and has great application potential.

The invention belongs to the technical field of tunable lasers, and particularly relates to a rotating shaft abnormity test system and method based on a tunable laser, and the system comprises a spectrum analyzer, an optical switch, an optical wavelength meter, and a calculation module. The mode-hopping-free tunable laser serves as a testing device, whether the rotating shaft for the tunable laser is abnormal or not is tested, an obtained resonance output wavelength testing result is automatically analyzed, and therefore the optimal tunable output interval which can be achieved by the rotating shaft to be tested is obtained. And on the basis, accurate screening of non-abnormal rotating shafts suitable for tunable laser assembly is realized.

The utility model discloses a kind of double-parameter optical fiber laser sensors based on Sagnac ring cascaded liquid phase filling MZI, belong to optical fiber sensor technical field, by LD pumped laser source (1), wavelength division multiplexer (2), holmium-doped optical fiber (3), optical circulator (4), sensing probe A (5), first coupler (6), sensing probe B (7), second coupler (8), optical spectrum analyzer (9), first single-mode optical fiber (501) polished in side edge, large core diameter hollow optical fiber (502) fills PDMS (503), few-mode optical fiber (504), fiber bragg grating (505), second single-mode optical fiber (506), third single-mode optical fiber (701), first panda polarization maintaining fiber (702), second panda polarization maintaining fiber (703), fourth single-mode optical fiber (704);The utility model can effectively improve the sensitivity of device to temperature by hollow optical fiber filling PDMS;By panda polarization maintaining fiber rotation shaft fusion splicing makes that interference phase difference amplification, spectral line drift is more obvious, so improve the sensitivity of device to temperature;Different reflection peak signals of few-mode optical fiber grating and Sagnac interference spectrum signals can establish sensitivity matrix to realize double-parameter measurement to temperature and strain, with excellent reliability and stability.