863 results about "Micro cavities" patented technology

The invention discloses a light-induced thermoelastic spectrum trace gas detection device and method based on an echo wall mode microcavity. The device comprises a first signal generator, a lock-in amplifier, a laser device control unit, a first laser device, a laser beam collimation unit, a gas chamber, a focusing lens, a tuning fork, an echo wall mode microcavity, a coupling medium, a second laser device, a second signal generator, a photoelectric detector and a computer, the emergent laser is focused to the interdigital root of the tuning fork through the focusing lens; laser output by the second laser device is transmitted by the coupling medium and coupled into the echo wall mode microcavity in an evanescent wave form, the echo wall mode microcavity deforms, the resonant wavelength of the echo wall mode microcavity in the transmitted spectrum moves, and the concentration of the gas to be detected in the gas chamber is inverted according to the displacement of the resonant wavelength. The problems that a quartz tuning fork is large in thermal noise and weak current signals are easily interfered by an electromagnetic field are solved.

The invention relates to an integrated microcavity optical comb repetition frequency and optical frequency locking device and method, and belongs to the technical field of integrated microcavity optical combs. The locking device comprises a pumping module, a power amplification module, a phase modulation module, an electro-optic driving module, an acousto-optic modulation module, an acousto-optic driving module, a band-pass filtering module, a micro-ring resonant cavity and a beam splitting module; the device comprises a soliton detection module, a control module, a repetition frequency detection module, a first feedback control module, an acetylene frequency stabilized laser, a beat frequency module, an optical frequency beat frequency detection module and a second feedback control module. The locking device can achieve full frequency locking of the microcavity optical comb, has the advantages of being high in frequency stability, wide in servo bandwidth, simple and compact in structure, tight in locking, low in noise, high in reliability and low in cost, and can provide a powerful tool for the field of precision measurement.

The invention discloses a high-reliability pressure-isolating and pressure-picking type optical fiber pressure sensor and a measuring method.The high-reliability pressure-isolating and pressure-picking type optical fiber pressure sensor comprises a sensor component, a first optical fiber, a second optical fiber, a temperature compensation boss and a diaphragm, the first optical fiber, the second optical fiber, the temperature compensation boss and the diaphragm are located in the sensor component, and the sensor component comprises a cylinder, a fixing piece and a sealing component and forms a pressure-isolating cavity; the first optical fiber is arranged in a temperature compensation boss connected with the fixing piece, the second optical fiber is connected with the fixing piece, the second optical fiber and the cylinder body form a synchronous microcavity temperature compensation structure, the diaphragm is arranged in the cylinder body, the diaphragm and the first optical fiber form a Fabry-Perot cavity, and the sensor component and the temperature compensation boss form a temperature self-compensation structure; according to the sensor, single pressure sensing of the diaphragm is achieved through the design of the pressure isolation cavity, the influence of temperature on the cavity length is greatly reduced through the temperature self-compensation structure and the synchronous microcavity temperature compensation structure, different measurement ranges are met by reasonably designing size parameters of the diaphragm, the creep deformation problem of the diaphragm is restrained through the diaphragm with the homogenized stress, and the measurement accuracy is improved. And the reliability and the stability of the sensor are improved.

The invention discloses an alanine aminotransferase detection device and method based on a liquid crystal microcavity array, and belongs to the field of optical sensing. The device comprises a functional liquid crystal microcavity array, an excitation optical fiber and a collection optical fiber, the microcavity array is composed of liquid crystal microcavities doped with fluorescent dye and stearic acid, and the multiple microcavities are independently distributed and serve as optical sensing units; the excitation optical fiber is used for synchronously exciting the microcavity to generate an echo wall mode, and the acquisition optical fiber acquires resonance spectrum signals of each channel in real time; the functionalized liquid crystal microcavity is converted into a bipolar configuration from a radial configuration in an enzymatic reaction, echo wall mode spectrum red shift is caused, spectrum shift time is in negative correlation with enzyme concentration, and dual-channel detection is realized by matching with conversion time of a polarized light pattern. According to the detection structure based on the liquid crystal microcavity array provided by the invention, high-flux, real-time and label-free rapid detection on the concentration of alanine aminotransferase can be realized.

The invention discloses a full-locking integrated microcavity optical comb based on coherent population trapping spectral lines, and belongs to the technical field of integrated microcavity optical combs. The full-locking integrated micro-cavity optical comb comprises a laser generation module, a frequency reference subsystem and a micro-cavity optical comb system. The laser generation module is used for generating two paths of laser, the frequency reference subsystem modulates one path of laser, a modulated optical signal is emitted into the atomic gas chamber system, and after transmission light is demodulated and subjected to phase-locked amplification processing, an optical frequency signal and a microwave signal which are locked to an atomic spectral line are obtained; and the optical frequency signal is fed back to the laser generating module to realize optical frequency locking. And the microcavity optical comb system adopts a microwave signal generated by the frequency reference subsystem as a frequency reference, and modulates the other path of laser to serve as pump light to enter the optical microcavity, so that optical comb output of a soliton state in the optical microcavity is realized. According to the invention, a single quantum system is taken as a reference, the problem of full locking of the micro-cavity optical frequency comb is effectively solved, and the system integration degree is relatively high.

The invention relates to the technical field of ultrasonic sensors, and discloses an optical fiber end face integrated micro-cavity sonic sensor which comprises a seven-core optical fiber, two light propagation waveguides, a coupling waveguide, a supporting assembly, a micro disc, a light emitter and a photoelectric detector, the two light propagation waveguides are arranged on the end face of the seven-core optical fiber, the coupling waveguide is arranged between the two light propagation waveguides, and the supporting assembly is arranged on the end face of the seven-core optical fiber. A supporting assembly is arranged on the end face of the seven-core optical fiber, a micro disc is arranged on the top of the supporting assembly, and the first fiber core and the second fiber core are connected with an external light emitter and an external photoelectric detector respectively. The wavelength of the laser output by the light emitter is locked at the linear slope of the micro-disk harmonic peak, the radius and the effective refractive index of the micro-disk are changed through the action of ultrasonic waves on the micro-disk and vibration, the harmonic peak drifts and the intensity of the output laser is changed, and then the ultrasonic waves are detected; compared with the prior art, ultrasonic waves are detected through a micro-disk resonance and laser sideband locking method, and the problem of electromagnetic interference can be effectively avoided by utilizing the optical principle.

The invention discloses an organic light-emitting device and a light-emitting device, one side of the organic light-emitting device close to an anode is provided with two hole transport layers which are arranged according to a high-low refractive index relationship, the material of the first hole transport layer is as shown in a formula 1, and the material of the second hole transport layer is as shown in a formula 2. According to the organic light-emitting device and the light-emitting device, through matching optimization of device film layer materials and structural combination of film layers with different refractive indexes, the stability of the materials and transmission of current carriers are guaranteed, meanwhile, light field distribution is improved through optimization of an optical microcavity structure, the photon extraction efficiency of the device is improved, and the light-emitting efficiency of the device is improved. The ineffective loss of photon energy in the organic layer is reduced, so that the performance of the organic light-emitting device and the light-emitting device comprising the organic light-emitting device is improved in the aspects of light-emitting efficiency, starting voltage, light-emitting service life and the like. Formula 1 and Formula 2.

The invention relates to the technical field of electroluminescence, and discloses a laminated organic light-emitting device and application thereof, and the laminated organic light-emitting device comprises an anode layer, a first light-emitting unit, an electron transport layer, an interface modification layer, a connection layer, a second light-emitting unit and a cathode layer which are sequentially arranged from bottom to top; the electron transport layer comprises a hole blocking layer and an n-type electron transport layer; wherein the n-type electron transport layer is composed of an n-type dopant and an organic electron transport material, has the functions of electron transport, charge separation and injection and regulation and control of the optical microcavity effect of the laminated device, can simplify the electron transport and connection layer structure of the laminated device, and effectively improves the conductivity of the laminated device; according to the laminated organic light-emitting device, the voltage drop of the body is obviously reduced, and the interface electron injection barrier is reduced, so that the laminated organic light-emitting device has the advantages of low driving voltage, high efficiency and long service life, and the effect of adjusting the optical microcavity of the device can be achieved by utilizing the n-type electron transport layer.

A continuous-wave perovskite polariton laser device, including an optical microcavity, a spacer layer, and a gain medium. The gain medium is a perovskite material or a composite material containing perovskite, in a form of thin film, microcrystal, phosphor, nanocrystal, quantum dot, or single crystal. The perovskite gain medium is prepared by solution process or vacuum deposition technique, and is combined with an optical resonator. By exploiting the strong interaction between excitons and photons, a steady-state exciton-polariton condensation is formed, enabling the generation of continuous-wave polariton laser emission with a low threshold. The laser device can achieve low-threshold continuous-wave or pulsed lasing emission at room temperature under various light sources pumping or electrical excitation. Its threshold is 1 to 3 orders of magnitude lower than that of conventional semiconductor lasers, with an optimized threshold as low as 0.1 to 1 W / cm2, representing a novel ultralow-power coherent light source technology.

The invention discloses a wind turbine generator blade vibration detection method based on an optical fiber echo wall mode singular point micro-cavity model, and relates to the field of wind turbine generator detection, and the method comprises the steps: carrying out the external vibration response of a detection position of a wind turbine generator blade, obtaining a micro-cavity response signal, measuring the mode splitting value of a micro-cavity based on the micro-cavity response signal, and calculating the mode splitting value of the micro-cavity. Determining vibration data of the wind turbine generator blades; constructing a three-dimensional model of the wind turbine generator blade, extracting modal parameters from the vibration data by using a random space method, and obtaining a vibration damage result of the wind turbine generator blade based on the modal parameters and the three-dimensional model; and performing fusion processing on the vibration data according to the combination of the on-site environment data of the wind turbine generator and the dynamic correction, determining a state estimation value of the wind turbine generator blade, and generating a vibration detection result of the wind turbine generator blade based on the state estimation value. The method achieves the accurate measurement of the weak vibration in a complex environment, and plays a key role in the operation detection and fault prediction of a wind driven generator.

The invention provides a weak measurement assisted echo wall mode microcavity time-varying signal sensing method and system. The method comprises the following steps: constructing a weak measurement assisted echo wall mode microcavity adaptive sensing platform for time-varying signal sensing; a time-varying signal is sensed through the echo wall mode microcavity, and a time-varying phase is introduced into the sensing platform; the light intensity of the echo wall mode microcavity sensing platform assisted by weak measurement is received through a photoelectric detector and a balance detector, the size of a current time-varying phase is calculated, and then the size of a current time-varying signal is solved; according to the size of the current time-varying phase, the bias phase, the first reference phase and the second reference phase are adjusted, so that the system works in a working interval of a preset condition; and estimating the time-varying signal in real time until the measurement is finished. On the basis of ensuring high-sensitivity sensing, the sensing interval of the echo wall mode microcavity is further expanded, and self-adaptive real-time measurement of the time-varying signal which is not limited by the sensitivity of the microcavity is realized.

The invention discloses an optical communication wavelength meter for exciting rubidium atom two-photon transition based on a lithium niobate microcavity optical comb. The optical communication wavelength meter comprises a microcavity optical comb module, a repetition frequency phase-locked loop, an initial frequency phase-locked loop, a rubidium atom gas chamber and a frequency-stabilized light source. The micro-cavity optical comb module is used for generating a fundamental frequency optical comb and a frequency doubling optical comb, rubidium atom two-photon transition is directly excited, the frequency stabilization light source achieves frequency stabilization through rubidium atom saturation absorption, and the repetition frequency phase-locked loop feeds back and adjusts repetition frequency according to error signals of two-photon transition fluorescence intensity. The initial frequency phase-locked loop feeds back and adjusts the initial frequency through beat frequency signals of the frequency multiplication optical comb and the frequency stabilization light source, and the two groups of phase-locked loops stabilize the frequency of the microcavity optical comb to two groups of transition energy levels, so that locking of the repetition frequency and the initial frequency is realized. According to the optical communication wavelength meter based on the lithium niobate microcavity optical comb excitation rubidium atom two-photon transition, the cross modulation effect in a pumping wavelength and pumping power combined adjustment mechanism is avoided, and the size of the optical communication wavelength meter is reduced.

The invention provides a method and a system for realizing a weak measurement enhanced chip-level microcavity gyroscope. The method comprises the following steps of: 1, providing a coherent state input by a system by using a single-frequency laser; 2, the output of the single-frequency laser is switched between a first path and a second path through an optical switch, the laser beam is transmitted to the first path in the first half part of the period, and the laser beam is transmitted to the second path in the second half part of the period; 3, the light transmitted along the first path and the second path respectively passes through an optical resonant cavity to sense the rotation angular speed, and a weak value amplification effect is achieved by setting front and back selection states; and step 4, weak measurement enhanced output results transmitted along the first path and the second path are respectively received by a photoelectric detector, and the value of the rotation angular velocity is demodulated according to the obtained output results. According to the invention, the optical microcavity is used as a sensing unit of the gyroscope, the sensing performance of the integrated optical gyroscope is greatly enhanced through a weak measurement technology, and the whole set of system can realize chip-level integration.

Disclosed are a heat-dissipating plate and a display device, the heat-dissipating plate includes a heat-dissipating plate body; a heat-dissipating microcavity embedded in the heat-dissipating plate body; and a heat dissipation working medium filled inside the heat-dissipating microcavity. The heat-dissipating microcavity includes a heat absorption tank, a liquid collection tank arranged at intervals with the heat absorption tank, and a capillary micro channel group between the heat absorption tank and the liquid collection tank and communicating with the heat absorption tank and the liquid collection tank, and the capillary micro channel group includes a plurality of capillary micro channels arranged at intervals.

The invention discloses a generating device capable of generating an ultra-flat broadband micro comb. The generating device comprises a pump pulse generating module, a micro comb generating module and a micro comb generating module, the pumping pulse compression module is connected with the pumping pulse generation module; the high-Q-value microcavity module is connected with the pumping pulse compression module; and the micro comb detection and feedback module is respectively connected with the high-Q-value micro-cavity module and the pump pulse generation module, and is used for monitoring the output spectrum and power change of the high-Q-value micro-cavity module and adjusting the output wavelength of the picosecond pulse light according to the output spectrum and power change so as to stabilize the ultra-flat broadband micro comb. By arranging the high-Q-value micro-cavity, the spectral bandwidth of the micro-comb can be effectively expanded, and the ultra-flat broadband micro-comb is output; meanwhile, the defects that the hyperbolic secant single soliton micro-comb is poor in flatness and narrow in bandwidth are overcome, and the micro-comb has obvious advantages in the application field with high requirements for the flatness and the spectral bandwidth at the same time.

The invention discloses a high-sensitivity double Fabry-Perot interference hydrogen sensor resistant to temperature and humidity interference, and belongs to the technical field of optical fiber sensing. A modular integrated design is adopted, and the core comprises double Fabry-Perot interferometers which are connected in series and are respectively a temperature compensation unit FPI-1 and a hydrogen sensing unit FPI-2, and a matched software controllable vernier processing module; the FPI-1 realizes temperature real-time compensation by filling PDMS in an open microcavity, and the FPI-2 adopts a PDMS / Pd-WO3 composite material as a hydrogen sensitive layer, and has wide humidity range anti-interference capability through structural optimization; the weak hydrogen signal is amplified through Fourier transform filtering, sine function fitting, twin interference spectrum construction and vernier effect. According to the invention, precise detection of ultra-trace hydrogen in a complex temperature and humidity environment is realized, and the temperature and humidity interference resistance is high.

The invention belongs to the technical field of light field modulation, and particularly relates to a light field modulation method based on a Fabry-Perot microcavity internal device. The method comprises the following steps: based on a micro-nano light processing scheme, constructing a Fabry-Perot microcavity laser based on intracavity low-light element light field shaping, and then placing the laser in a light field test system; the method comprises the following steps: (1) detecting an output laser pattern, and controllably constraining and modulating an intracavity light field by adjusting the position of a laser; (2) detecting an output laser spectrum, further adjusting the pumping energy to obtain a relation between a spectrum peak value and the pumping energy, and realizing high-quality factor single-mode laser; by designing the matching relation between the optical continuous interface or diffraction structure configuration and the micro-cavity configuration in the micro-cavity laser, the performance parameters of the Fabry-Perot micro-cavity and the modulation of the intra-cavity light field can be realized, so that the high-quality factor micro-cavity laser and the customized output of the light field in a specific laser mode are realized.

The invention provides a topological posture single photon source device and a quantum light source, and relates to the technical field of topological quantum light sources. The topological state single photon source device comprises a GaAs layer; the SiO2 / Au structure comprises a SiO2 layer and an Au layer, and is positioned below the GaAs layer to serve as a reflecting mirror for inhibiting backward photon leakage; the topological state microcavity is processed and formed on the GaAs layer; and the quantum dots grow in the GaAs layer and are coupled with the topological posture of the topological posture microcavity to generate a topological posture single photon source. According to the invention, the coupling efficiency of the quantum dots and the microcavity is effectively improved by using the mode volume with a relatively large topological posture, the bottleneck that the coupling probability is low due to the limited volume of a traditional mode is broken through, and a better scheme is provided for realizing the interaction of high-efficiency light and substances.

The invention provides a dynamic polarization three-dimensional imaging system, which relates to the technical field of anti-counterfeiting encryption and comprises a light source, a polarization film and a color three-dimensional imaging module which are sequentially arranged along a light path, the light source is used for providing visible band incident light; the polarizing film is configured to transmit TM polarized light when rotating 0 degree and transmit TE polarized light when rotating 90 degrees; the color three-dimensional imaging module comprises a micro lens array, a transparent spacing layer and a micro image-text array which are sequentially arranged along a light path; the micro image-text array comprises a metal coating layer, a grating layer and a glass substrate which are stacked from top to bottom, wherein the grating layer forms a Fabry-Perot-like microcavity resonance structure; the polarization state of the incident light is switched by rotating the polarization film, so that the stereo image of the micro image-text array is dynamically switched among an appearing state, a hiding state or a color changing state. According to the invention, wide-color-gamut and dynamically-adjustable color stereo imaging is realized, and the complexity and the identifiability of anti-counterfeiting encryption are improved.

The invention belongs to the technical field of optical gas sensing, and provides an optical fiber microcavity gas sensing system and method based on photoacoustic excitation and detection enhancement. The sensing system comprises a narrow linewidth laser light source, a wide-spectrum detection light source, a wavelength division multiplexer, an optical circulator, a high-speed spectrometer, a signal processing circuit, a single-mode optical fiber and an embedded single-optical-fiber photoacoustic sensing probe. The novel structure is characterized in that the partially gold-plated optical fiber is embedded into the gold-plated opto-acoustic micro-cavity to form a miniature optical'cage ', so that multiple reflections of light in a free space are realized. In addition, in order to make full use of the high sensitivity of the silicon cantilever beam in photoacoustic detection, the structural design of the embedded single optical fiber for expanding the inner cavity reduces the pressed film damping of the silicon cantilever beam during resonance. According to the embedded single-optical-fiber photoacoustic sensor, the multi-pass photoacoustic microcavity and the ultra-sensitive optical fiber microphone are applied, so that double enhancement of photoacoustic excitation and detection is realized, and the gas detection precision is improved.

The invention provides an acoustic signal detection system based on an echo wall mode microcavity acoustic sensor. The acoustic signal detection system can be applied to the technical field of acoustic signal sensing and detection. The acoustic signal detection system comprises an echo wall mode microcavity acoustic sensor used for performing amplitude and phase modulation on predetermined polarization modulation light to obtain output light under the condition that an external acoustic signal acts on the echo wall mode microcavity acoustic sensor and the predetermined polarization modulation light passes through the echo wall mode microcavity acoustic sensor; the detection unit is used for performing coherent processing on the output light based on the predetermined reference light to obtain two paths of target signals, and the two paths of target signals are related to the target transmission amount and the target phase amount; the processor is used for analyzing the two paths of target signals to obtain target transmission quantity and target phase quantity; and according to the target transmission amount, the target phase amount and a plurality of first target formulas, an external sound signal is obtained, and the plurality of first target formulas represent the incidence relation between the target transmission amount and the external signal and the incidence relation between the target phase amount and the external signal.

The invention provides a full-automatic parameter measurement system and method for a micro-cavity optical chip, and the system achieves the automatic measurement of the characteristic parameters of the micro-cavity optical chip through integrating a DFB tunable laser light source, an isolator, an EDFA amplifier, an ASE filter, a fundamental frequency light band elimination filter, a selectable beam splitter, a VOA, a PD, a main control module and other components. The system is connected with a to-be-tested chip through a specific interface, and can automatically obtain a central wavelength change curve, a transmission spectrum characteristic afterglow map and an expected soliton state intensity range of the micro-cavity optical chip at each temperature. The invention aims to automatically test the characteristic parameters of the micro-cavity optical chip so as to assist in reducing the time generated by tuning the optical frequency comb by adopting the chip, and meanwhile, an expected soliton state intensity range is given to reduce the problem of excessive tuning, so that a pre-test process required in chip application is simplified, and great convenience is brought to debugging generation of the integrated optical frequency comb.

The present disclosure relates to the technical field of display, and provides a light-emitting device and a display panel. The light-emitting device comprises a first electrode, a second electrode, a plurality of light-emitting units arranged between the first electrode and the second electrode, and a charge separating generating unit arranged between adjacent light-emitting units, wherein a light-emitting center of the light-emitting unit is located at an antinode point of a resonance wave of a resonant microcavity formed between the first electrode and the second electrode.

The invention discloses a piezoelectric ceramic-based single droplet generation device, which comprises a microcavity liquid chamber, a piezoelectric driving assembly, a micropore nozzle, a hydraulic adjusting system and an electric control driving module, the bottom of the microcavity liquid chamber is provided with a nozzle interface, and the volume of the internal cavity is adaptive to trace liquid storage and pressure transmission; the piezoelectric driving assembly comprises a piezoelectric ceramic element which is connected with the micro-cavity liquid chamber in a bonding manner and is used for generating deformation under the driving of an electric signal so as to apply pulse pressure to liquid in the liquid cavity; the micropore nozzle is detachably connected to the bottom of the liquid chamber, the diameter of a spraying hole is adjustable, and the micropore nozzle is used for controlling the initial size of liquid drops; the electric control driving module comprises a power supply, a driving circuit and a controller, is used for outputting an adjustable electric signal to cooperatively control the voltage amplitude, the pulse width and the trigger frequency of the piezoelectric driving assembly, and is linked with the hydraulic adjusting system to realize multi-parameter regulation and control of the droplet size; according to the invention, through cooperation of the piezoelectric driving assembly and the electric control module, high-precision liquid drop control is realized.

The invention relates to the field of nanometer materials, in particular to a 2D-TMDs transverse heterojunction array and a Zigzag M / X end induction preparation method and application thereof, and the preparation method comprises the steps that a single crystal nanosheet of an A material is obtained, the A material is MX2, and M is W or Mo; x is S or Se; laser confocal etching treatment is conducted on the single crystal nanosheet, and the scanning angle of the laser confocal etching treatment ranges from 10 degrees to 50 degrees; carrying out micro-cavity thermal etching on the single crystal nanosheet with the arraying point defects; preparing a banded array with zigzag M / X atom alternating ending edges; and depositing a B material by taking the prepared strip array as a deposition template, and enabling the B material to laterally and epitaxially grow along the edge of the strip array to prepare the A-B lateral heterojunction array of the specific heterogeneous interface. According to the Zigzag M / X end induction preparation method disclosed by the invention, a better two-dimensional material interface and structure can be obtained, and better performance can be shown.

The invention discloses a single-laser self-injection locking resonant optical gyroscope based on light intensity detection and a working method thereof, and belongs to the technical field of optical gyroscopes, a working light source DFB laser is connected with a first port of a circulator, and a second port of the circulator is connected with a beam splitting coupler through an isolator; two output ends of the beam splitting coupler are respectively connected with an input end of the echo wall microcavity and the phase modulator, and the phase modulator is connected with the other input end of the echo wall microcavity; a first port of the output end of the echo wall microcavity is connected with a third port of the circulator, and a second port of the output end of the echo wall microcavity is connected with the frequency locking amplifier through the photoelectric detector. According to the invention, the problems of high cost of double light sources in the self-injection locking resonant optical gyroscope and frequency drift and complex structure of beat frequency detection are solved, so that the measurement precision and economical efficiency of the gyroscope are effectively improved.

The invention belongs to the related technical field of sensors, and provides a multi-parameter integrated acquisition optical fiber sensor and a monitoring system thereof in order to solve the problem that high-precision monitoring of a static signal and a dynamic signal is difficult to consider by an existing sensor at the same time, a sensing cavity is sequentially divided into a static signal sensing area and a dynamic signal sensing area in the axial direction; the static signal sensing area adopts a multi-core fiber, fiber gratings are respectively engraved on the multi-core fiber, and the wavelength demodulation of the static signal is realized through the central wavelength drift distance of the fiber gratings; the dynamic signal sensing area is provided with a dynamic signal sensing unit, the dynamic signal sensing unit comprises F-P air microcavities formed between the dynamic signal sensing unit and the end faces of all fiber cores of the multi-core optical fiber, and intensity demodulation of dynamic signals is achieved through cavity length changes of the F-P air microcavities. According to the invention, a wavelength modulation and intensity modulation parallel composite demodulation mechanism is adopted, and decoupling acquisition of static strain, temperature and dynamic vibration is realized in a single sensor.

The invention relates to a Raman activated cell sorting system coupled with micro-fluidic and Raman optical tweezers and a method thereof, and relates to the technical field of cell sorting, the system comprises a micro-fluidic chip with low Raman and fluorescence background noise and a pneumatic micro-valve; in the micro-fluidic chip, a sample channel and a micro-cavity are connected with a main channel, and a flow guide channel is connected with the micro-cavity; the flow guide channel and the collecting channel are connected through a pneumatic micro valve. After the pneumatic micro valve is closed, the fluid in the micro cavity is static, and a narrow sample flow is formed in the main channel. And when the Raman collection time is less than the time difference of two adjacent cells flowing through the capturing point of the optical tweezers in the narrow sample flow, high-flux Raman detection can be performed in the narrow sample flow. On the contrary, the target cells can be moved out of the narrow sample flow, and high-precision Raman detection in a long Raman collection scene can be realized. After sorting is completed, fluid flowing of the main channel is stopped, the pneumatic micro valve is opened, the cells stored in the micro cavity are released and collected in a unified mode, the cell suspension volume is more stable and uniform, and follow-up experiment operation is facilitated.

The invention discloses a mode locking system and a mode locking method suitable for microcavity ultrasonic detection. The system comprises a control module, a laser output module and a detection module, the laser output module comprises a single-frequency laser, a temperature adjusting unit, a temperature detection unit and a heat transfer unit, and the detection module is used for detecting a transmission spectral line of the microcavity ultrasonic probe and transmitting the transmission spectral line to the control module; the control module is used for controlling the temperature in the cavity of the single-frequency laser through the linear interpolation data, realizing linear regulation and scanning of the wavelength entering the cavity, and screening and locking the microcavity mode of the microcavity ultrasonic probe; the device is also used for detecting a locking site of a microcavity mode by adopting a temperature detection and light intensity voltage feedback design, and automatically adjusting the temperature in a mode drift process to adjust the wavelength so as to correct the mode drift of the microcavity. The functions of mode scanning, active mode selection and mode locking of the microcavity ultrasonic probe can be autonomously completed, and a stable, reliable, low-cost and high-sensitivity new scheme is provided for ultrasonic detection.

The invention provides an echo wall mode microcavity time-varying signal sensing method and system. The echo wall mode microcavity time-varying signal sensing method comprises the steps of S1, building an echo wall mode microcavity time-varying signal sensing experiment platform based on a double-optical-comb spectrum technology; s2, starting a dual-light frequency comb; s3, sensing a time-varying signal through coupling of a coupling device and the echo wall mode microcavity; s4, performing Fourier transform on the output of the reference path and the signal path within one sampling time, and extracting a time-varying signal by using a plurality of modes of the microcavity; and S5, repeatedly executing the step S4 until the measurement is finished. Time-varying parameter sensing is achieved through multiple modes of the microcavity, high sensitivity is achieved, meanwhile, high precision and a large dynamic range are achieved, and application of microcavity sensing is further expanded.