4044 results about "Transmitted light" patented technology

A quantum key delivery system in which a first transmission device phase modulates a first polarization component of two orthogonal polarization components in transmitted light and modulates a second polarization component, which is the other polarization component, into a signal indicating the second random number sequence, based on a first random number sequence indicating the bit sequence to be transmitted and the second random number sequence indicating the base in the phase modulation of the bit sequence to be transmitted; and a second transmission device separates orthogonal polarization modes in the received light and extracts a clock timing from the signal indicating the second random number sequence.

The invention provides a multi-layer optical film detection method, device and equipment and a storage medium, and the method comprises the steps: obtaining a polarization phase difference signal of transmission light and reflected light through multi-angle incidence irradiation of a multi-band programmable laser source, and recording the polarization ellipticity parameter change; then combining confocal microscopic interference and polarization analysis to determine a space coordinate and a stress distribution diagram of a stress abnormal region; continuously irradiating in a photo-thermal coupling environment through a broadband light source, and monitoring interference signals, polarization states and temperature changes to obtain dynamic evolution characteristics; and finally, performing a simulation test on the multi-layer optical film in a system environment with preset optical axis arrangement and light beam energy distribution, obtaining an in-situ polarization state and interference pattern data, and evaluating the optical performance of the film layer. According to the invention, potential defects can be positioned under high resolution, and the reliability and imaging quality of the film layer under complex application conditions can be accurately evaluated.

The invention provides a wavelength adjustment method, device and equipment for an LED detection light source and a storage medium, and the method comprises the steps: transmitting multiband incident light through an LED light source array, and receiving reflected light or transmission light of a detection object through a photoelectric detector array, thereby obtaining the spectral feature data of the detection object. And according to the spectral feature data, calculating a signal-to-noise ratio value and a feature response difference value of each wavelength interval, and performing multi-target parameter optimization in combination with a background noise coefficient of the detection object to obtain an optimal detection wavelength parameter group. And then, through linkage control of the driving current and the chip temperature of the LED light source array, matching output signals of multiple groups of wavelengths are obtained. And adjusting the wavelength of the LED light source array according to the compensated optimal detection wavelength parameter group. According to the method, adaptive wavelength adjustment can be carried out according to the spectral characteristics of the detected object, light source output is optimized, the signal-to-noise ratio is improved, the detection precision is further improved, and the method has remarkable advantages in optical detection application in a complex environment.

The invention relates to the technical field of optical detection, in particular to a glass bottle surface spraying quality detection method which comprises the following steps: under a specified wavelength, acquiring target incident light by adjusting a polarization angle, irradiating a glass bottle spraying layer, collecting a transmission spectrum signal to calculate parallel and vertical polarization transmissivity and ratio of the spraying layer, and generating polarization transmissivity. According to the method, the light with the polarization angle irradiates the spraying layer, the polarization component of the transmission light is obtained, the thickness uniformity and the internal structure are analyzed, weak areas, particle flaws and excessive spraying of the spraying layer are recognized, the defect detection precision is improved, multi-angle transmissivity data are collected, the change rate is calculated, and color deviation and thickness abnormity are accurately positioned; through cross analysis of multiple optical parameters, evaluation of adhesive force, curing quality and color consistency is more detailed, spraying abnormity is classified, multiple detection means act synergistically, interference such as environment illumination and material reflectivity is reduced, and the detection accuracy of spraying quality is improved.

An example apparatus, method, and system for determining a characteristic of a target gas in a fluid sample is provided. In some embodiments, the example apparatus includes a frequency comb illumination source configured to emit pulsed light having a plurality of frequency comb wavelengths. The apparatus also includes an optical cavity containing a fluid sample and exhibiting a plurality of cavity resonance modes. A frequency comb wavelength of the plurality of frequency comb wavelengths associated with the frequency comb illumination source is configured to align with a cavity resonance mode of the plurality of cavity resonance modes. A characteristic of the fluid sample is determined based on one or more optical characteristics of a transmitted light passing through the fluid sample within the optical cavity.

A robot in accordance with at least some embodiments of the present technology includes a neck region through which the robot is configured to transmit and receive light. The robot defines a robot height and includes a body, a head carried by the body, and a neck extending between the head and the body along the robot height. The robot further includes a structural neck frame at a periphery of the neck in a plane perpendicular to the robot height. The structural neck frame defines windows distributed around the periphery of the neck. The robot further includes a sensor disposed at least partially within the structural neck frame. The sensor includes a laser configured to transmit light via the windows and a detector configured to receive light via the windows. A field of view of the sensor extends at least 320 degrees around the neck.

The invention discloses a particle size measuring device based on combination of a dynamic light scattering method and a sedimentation method and a measuring method thereof. The particle size measuring device comprises a laser, a light intensity adjusting unit, a sample pool, a thermostatic bath, a PD detector, an optical fiber head, an APD detector, a data acquisition unit, a PC and a control unit. The laser emits incident laser, the incident laser passes through the light intensity adjusting unit, penetrates through the sample cell and a sample and then enters the PD detector, and a transmission light signal is collected through the data acquisition unit and transmitted to software for calculating the particle size and concentration of settled large particles; scattered light is received by an optical fiber head with a fixed angle of 90 degrees or 160-175 degrees and is converted into a digital signal by an APD detector, and the digital signal enters a data acquisition unit and is transmitted to software for calculating the particle size of particles in a non-settling nanometer range. According to the technical scheme provided by the invention, the particle size distribution information of the wide-distribution particle dispersion system in a nano-micron range can be measured in a testing process.

A home appliance, e.g. a refrigerator, includes a cabinet forming a space and a door for opening and closing the space, the door including a door body with an insulator filled therein, and a panel assembly mounted in front of the door body, wherein the panel assembly includes a lighting device configured to emit light, a panel forming a front surface of the door and configured to transmit light therethrough, a light guide plate disposed behind the panel and configured to guide light emitted from the lighting device to the panel, and a member disposed between the panel and the light guide plate, including the panel and the light guide plate mounted thereon, and configured to transmit light of the light guide plate through an entire part of the panel.

The invention relates to the field of water quality parameter detection, in particular to a full-spectrum water quality multi-parameter analysis detector which comprises a full-spectrum acquisition module, a preprocessing module, an information processing module and an application module. The full-spectrum acquisition module is used for transmitting a full-spectrum signal to a detection sample, detecting transmission light and scattered light signals and generating original spectrum data; the preprocessing module is used for preprocessing the original spectrum data by adopting an edge calculation mode to obtain a standardized spectrum matrix; the information processing module is used for calculating the actual concentration value of each impurity in the detection sample according to the standardized spectrum matrix; according to the method, the influence relation between different types of impurities is introduced, compared with a common prediction method, the prediction precision of the concentration of each impurity is higher, whether early warning is needed or not is judged according to the prediction precision, and the situation of misjudgment is avoided.

The invention discloses an equivalent self-noise pressure suppression method and device based on a multi-core optical fiber space division multiplexing signal, light emitted by a narrow linewidth laser is split through a first coupler C1, one path of light passes through an acousto-optic modulator AOM to generate a pulse signal, and then the pulse signal passes through a second coupler C2 to generate a pulse signal; the pulse light is divided into two beams of transmission light, the two beams of transmission light are injected into a connected sensing optical fiber through two groups of erbium-doped optical fiber amplifiers (EDFA), two groups of filters, two groups of circulators and a fan-in coupler Fan-in Coupler, and the pulse light is subjected to backward Rayleigh scattering in the sensing optical fiber; based on the dual-channel DAS system, the multi-core optical fiber serves as the sensing optical fiber, three cores and four cores of the multi-core optical fiber are connected in series to form two sensing channels, seven-core space division signals are multiplexed, the equivalent self-noise suppression effect of the seven-core space division signals is analyzed, and the detection capacity of the system for low-frequency weak signals can be improved.

Apparatus and methods for monitoring the status of a floating roof. The floating-roof tank assembly has: an impermeable roof section, and a floating-roof seal configured to span between the impermeable roof section and components of a container. One or more deformable floats are attached to the roof section to provide buoyancy so that the roof floats on top of the liquid contained in the container. To monitor the status of the floating roof tank, it is provided with a fiber optic sensor array comprising one or more fiber optic sensors. A light source configured to transmit light to the fiber optic sensors and a receiver configured to detect light from each fiber optic cable after it has interacted with the fiber optic cable. Based on the received light, a controller configured to process the light received by the receiver to determine the status of the floating roof tank.

The invention discloses a peripheral visual area defocused long-distance imaging optical system, and the system comprises a defocus panel which is located right above an observed object, and comprises a flat plate region and a micro-lens array region; the flat plate area is used for directly transmitting light emitted by an observed object; the micro-lens array area is used for carrying out first imaging on the peripheral area of an observed object to form a real image; the objective lens is positioned right above the defocus panel, and is used for performing first imaging on the observed object to form a virtual image of the observed object, receiving a real image of a peripheral area of the observed object, and performing second imaging to form a virtual image of the peripheral area of the observed object; the eyepiece is located right in front of the human eyes and used for conducting secondary imaging on the observed object, forming an amplified long-distance virtual image in front of the human eyes, receiving a virtual image of the peripheral area of the observed object and forming a real image in front of the peripheral retina in the human eyes. And the purpose of preventing and controlling myopia is better achieved.

The invention relates to the technical field of spectrum detection, in particular to a multi-spectrum single-gas-chamber multi-gas self-defined detection method and system.The surface of a cavity mirror of an integral cavity is subjected to regional film coating according to detection requirements, multiple annular reflection regions and a circular reflection region are formed through film coating, the central wavelengths reflected by different reflection regions are different, and the central wavelengths are different; corresponding to absorption peaks of different gases, in order to overcome the limitation of a detector on a detection wave band and optimize a detection light path, a central light beam turning structure is arranged on a light path of an emergent end of the integral cavity and is used for changing the propagation direction of transmission light of a circular reflecting region, so that the transmission light enters a second detection device; the transmission light of the annular reflection area is incident to the first detection device, the problem that the detection spectrum of a traditional detection system is limited by the response range of a single detector is solved, and the detection system can detect and cover a wide range from short waves to long waves by customizing the working spectrum of the two detection devices.

The invention relates to the technical field of sensors, and provides a visual tactile sensor and a robotic.The visual tactile sensor comprises a shell, an elastic body, a light-transmitting plate, a camera, a light source and a light uniformizing plate, the camera, the light source and the light uniformizing plate are arranged in the shell, the elastic body is connected to the surface of the front end of the light-transmitting plate, and the light-transmitting plate is embedded in the front end of the shell; the elastic body protrudes out of the front end surface of the shell, the light-transmitting plate is made of light-transmitting materials, one end of the light uniformizing plate corresponds to the light source, the other end of the light uniformizing plate corresponds to the side portion of the light-transmitting plate, and the light-transmitting plate is used for transmitting light from the side portion of the light-transmitting plate to the front end surface of the light-transmitting plate. Therefore, more uniform light can be obtained to irradiate the surface of the elastic body connected to the surface of the front end of the light-transmitting plate, the light supplementing uniformity of the light source in the visual tactile sensor is effectively improved, the imaging quality of the elastic body of the visual tactile sensor is further improved, and meanwhile, the precision and the stability of the visual tactile sensor are improved.

A switchable light modulating device with an electrophoretic medium disposed between a first light-transmissive electrode layer and a second electrode layer. The device includes one or more apodization structures in a bottom of a cell that contains the electrophoretic fluid, and the apodization structures reduce optical interference when the cell is in an open state and the structure is viewed with reflected or transmitted light passing through the apodization structure.

According to the mining dust monitoring system and method based on multi-wavelength fusion and dynamic compensation, a light chamber is arranged in an inner cavity of a shell, an inlet of the light chamber is connected with a main gas inlet of the shell through a gas inlet pipeline, and an outlet of the light chamber is connected with a main gas outlet of the shell through a gas exhaust pipeline; the laser detection module is mounted in the light chamber and comprises a lens group, a laser source I, a laser source II, a light scattering signal receiving module, a light transmission signal receiving module and a light trap; the first laser source and the second laser source form a dual-wavelength laser source; the micro fan is mounted in the main air outlet; the environment sensing module is mounted in the exhaust pipeline; the method comprises the following steps: constructing an environment drift prediction model; testing the dust concentration in the environment to be tested, and calculating the dust concentration I Csct and the dust concentration II Ct based on the scattered light electric signal and the transmission photoelectric signal; and carrying out environment drift prediction, and obtaining corrected dust concentration data through a fusion calculation mode. According to the system and the method, an accurate dust concentration monitoring result can be obtained.

The invention discloses a correction method and system for laser emission direction adjustment, and relates to the technical field of image processing, and the method comprises the steps: capturing laser spot real-time image data through a CCD camera, extracting a spot region through a U-Net model, and setting a standardized reference region through calculating the side length of a square frame; selecting light spots by using a square frame to establish a relative coordinate system, carrying out gridding processing and positioning the centers of the light spots, and finally converting the light spots into actual coordinates of a world coordinate system; acquiring reflected and transmitted light spot coordinates and light spot position data from the position sensitive detector and the optical fiber sensor, and calculating deviation by using structural projection to obtain a corrected cursor; and a processing plane network model is constructed in the laser correction server, a galvanometer rotation angle set is calculated, laser scanning is executed, and feedback and correction are performed according to the deviation between the actual light spot position and the theoretical positioning point. According to the invention, the light spot region is extracted through the U-Net model, high-precision light spot segmentation is realized under the complex background and noise interference, and the accuracy of light spot positioning is improved.

A multi-source water pollutant detection device based on multi-dimensional spectral information fusion comprises a base, a light shield, an electric signal detector, an absorption and fluorescence generation mechanism and a light filtering and light transmitting mechanism, the absorption and fluorescence generation mechanism and the light filtering and light transmitting mechanism are oppositely arranged on the base, and the light shield covers the base; the light filtering and transmitting mechanism comprises a plurality of light filters, through holes, light filter mounting fixing parts and photoelectric sensors; the photoelectric sensors are used for converting fluorescence signals filtered by the corresponding light filters and transmission light signals passing through the through holes into electric signals; the photoelectric sensors are connected with the electric signal detector; the absorption and fluorescence generation mechanism comprises a sample bin and a light source irradiation part for irradiating light sources with different wave bands in the sample bin, and a focusing part is arranged on the sample bin and used for focusing transmission light and fluorescence generated after irradiation and absorption of the light sources with the corresponding wave bands and irradiating the transmission light and the fluorescence to the through hole in the light filter mounting and fixing part and the light filter. According to the utility model, the advantages of absorption spectrometry and three-dimensional fluorescence spectrometry are fused, and rapid detection of pollutants is realized.

The invention discloses a multi-fluorescence imaging device capable of adjusting visual field area and optical tomography, which comprises a multi-wavelength light source, the multi-wavelength light source comprises a wavelength variable light source or a light source array, and the wavelength variable light source and the light source array are independent and can realize multi-wavelength output. The optical fibers are mounted on the multi-wavelength light source and transmit light according to different wavelengths, the optical fibers are circularly placed at certain intervals, and the diameter of the optical fibers is changed according to applied voltage and applied temperature to form an annular magnetic disk. The wavelength of the exciting light can be freely adjusted by utilizing a multi-wavelength light source or realizing the exciting light with variable wavelength, a plurality of contrast agents are excited to obtain a multi-wavelength fluorescence image, the characteristics of the plurality of contrast agents can be simultaneously observed, and the universal fluorescence imaging device is widely applied to multi-antigen analysis and treatment. The method can be used for measuring lesion light cross-sectional images and has the advantage of analyzing lesion cross-sectional structures in real time.

The invention relates to the technical field of laser ranging, in particular to a high-precision real-time distance calculation method based on a double-optical-comb laser ranging system. The high-precision real-time distance calculation method based on the double-optical-comb laser ranging system comprises the following steps: generating a double-optical-comb laser signal: generating the double-optical-comb laser signal by using a nonlinear optical effect, and dividing the double-optical-comb laser signal into two beams of light through an optical element for transmitting and receiving respectively; and transmitting the light signal: transmitting the transmitted light beam to a target object through an optical fiber or a free space. According to the invention, by adopting the double-optical-comb laser signals and combining real-time calculation of phase difference and frequency information, the distance measurement precision is obviously improved, the measurement precision of a submillimeter level can be achieved, and meanwhile, through real-time signal processing and a dynamic feedback mechanism, measurement requirements under different environmental conditions can be rapidly adapted; the timeliness and accuracy of a measurement result are ensured, and the dynamic measurement requirement is met.

The invention belongs to the technical field of flight test photoelectric testing, and particularly relates to a cloud particle parameter measuring device and method based on digital holographic imaging. The device comprises a device pneumatic shell (100), a signal transmitting end arm (300), a signal receiving end arm (200), a measuring module and a data processing module, the device pneumatic shell (100) is integrally provided with a columnar pneumatic appearance, the signal transmitting end arm (300) and the signal receiving end arm (200) are arranged at the same end of the device pneumatic shell in parallel, and the opposite sides of the signal transmitting end arm (300) and the signal receiving end arm (200) are provided with a transparent transmitting light window (301) and a transparent receiving light window (201) respectively. The measuring module is arranged in the pneumatic shell of the device, the measuring module generates an emission light beam, the emission light beam is emitted through the signal emission end arm and then received through the signal receiving end arm to form holographic image information, and the holographic image information is transmitted to the data processing module; and the data processing module analyzes the image and calculates to obtain a particle median volume diameter MVD and an atmosphere liquid water content LWC. Accurate measurement of geometric quantities such as three-dimensional morphology, particle size distribution and the like, motion quantities such as three-dimensional speed, rotation characteristics and the like, and statistical quantity information such as median volume diameter (median volume diameter), liquid water content (liquid water content) and the like of ice crystal / water drop particles in multi-scale complex-form cloud can be realized; and autonomous control of the core test equipment for the icing flight test of the aircraft is realized.

The invention provides a metasurface structure design method and a metasurface structure, and the method can comprise the steps: initializing a rotation angle of the metasurface structure; a first light field construction step: constructing a transmission light relation of the current metasurface structure based on the rotation angle; a second light field construction step: constructing a diffracted light relationship of the current metasurface structure based on the transmitted light relationship so as to determine the light intensity distribution of the image plane; an error construction step: calculating an iteration constraint value according to the image plane light intensity distribution and the target light intensity; wherein the target light intensity is a preposed parameter, the target light intensity is the light intensity corresponding to the target metasurface structure, and the target metasurface structure is a design target; if it is judged that the iteration constraint value is larger than the set value, the rotation angle is updated, the updated rotation angle is obtained, the first light field construction step, the second light field construction step and the error construction step are repeatedly executed till the iteration constraint value is not larger than the set value, and the target metasurface structure is determined based on the current rotation angle.

The invention belongs to the technical field of flow field optical measurement, and particularly relates to a high-enthalpy plasma gas temperature measurement method, system and device based on an absorption spectrum. Generating a composite modulation signal through a high-frequency sine wave and a low-frequency sawtooth wave, and enabling incident light to pass through a flow field measurement area in parallel through laser modulation and beam shaping; the detector receives the transmission light and converts the transmission light into an electric signal containing harmonic information, the signal acquisition device is used for performing signal acquisition, the phase-locked demodulation algorithm is used for extracting second harmonic, and the temperature is inversely deduced by combining the double-spectral-line temperature measurement method and the Fourier coefficient amplitude ratio of the second harmonic with the HITRAN database. The system comprises a signal driving module, a laser emission module, a detection acquisition module and a temperature measurement module. The device is composed of a signal generator, an in-phase adder and the like, and a laser is matched with a driving power supply to guarantee stable work. According to the scheme, aiming at the problems of weak signal absorption and insufficient signal-to-noise ratio under complex working conditions, the measurement accuracy and reliability are improved by composite modulation, harmonic extraction and a bispectral line algorithm, and an effective means is provided for research on thermal characteristics of the high-enthalpy plasma.

The resolution-customizable micro spectrometer based on the transverse dispersion metasurface comprises a dispersion metasurface array structure and a focal plane pixel array, and the dispersion metasurface array structure comprises a plurality of dispersion metasurface sub-arrays which are distributed in an array mode and used for preliminary spectrum decoupling and directional convergence. The dispersion metasurface subarray comprises a plurality of dispersion metasurface units and all-dielectric substrates thereof, the dispersion metasurface units are nano-columns with four-fold symmetry, the nano-columns are periodically arranged, and the phase of transmission light is dynamically regulated and controlled according to the frequency omega of incident light. The focal position (x ', y') of the transmission light on the focal plane is in a linear mapping relation along with the change of the omega; the focal plane pixel array comprises a multi-element plane array composed of a plurality of pixels, and the multi-element plane array is in pixel-level registration with the dispersion metasurface sub-array. According to the invention, pixel-level precise condensation is realized, crosstalk is effectively inhibited, the detection precision is improved, and real snapshot spectral imaging is realized.

The invention discloses a backbone network line attenuation analysis early warning method and system based on deep learning, and belongs to the technical field of line attenuation analysis. Acquiring channels in a link, and constructing a channel database; generating a data acquisition node sequence, and setting a time window for collecting receiving and transmitting optical power data of a channel; establishing a receiving and transmitting light power data set, and analyzing and quantifying a data acquisition period by changing the size of a time window; the overall loss fault degree of the links is analyzed and evaluated, and the correlation degree between the different links is calculated; presetting an overall loss fault degree threshold value, and analyzing and outputting an early warning; according to the invention, through power data analysis and fluctuation monitoring based on the time window, the data acquisition period is optimized, and the network health state identification capability is improved; by evaluating the overall loss fault degree of the links and calculating the correlation degree between the links, potential faults are found in time, a reliable basis is provided for network maintenance, and the operation stability and reliability of the network are improved.

The invention discloses a film strength detection method and related equipment, and the method comprises the steps: carrying out the multi-angle broadband scanning sampling of the whole process of an incident light beam penetrating through a lens, recording the transmission light intensity, group phase and scattering power, and generating a reference transmission spectrum matrix; applying low-amplitude periodic ultrasonic vibration disturbance to the lens according to the reference matrix, synchronously obtaining a transmission spectrum time change curve, and performing time domain analysis to obtain a stress response characteristic matrix; determining a detection path by integrating the two matrixes, performing incremental load scratch disturbance along the path, recording data of transmission light intensity and scattering power changing along with the load in real time, and forming a critical damage response data set; performing fine grid transmission light scanning on the scratch and the neighborhood, acquiring multi-angle scattering distribution, and constructing optical characteristic distribution data; and performing multi-dimensional analysis on the data, and outputting a result. According to the scheme, early-stage accurate identification and evaluation of microcracks in a lens film layer and interface hidden defects are realized, and the use reliability of the lens is improved.

Method and system for optically checking molded parts (10) in a transmitted light method, more particularly closures or the like produced by thermoforming or compression molding methods, comprising transporting the molded parts (10) from a transport device (50) through an optical checking area, and recording at least one image of the molded part (10) using a recording device (20), whereby the molded part (10) is located between the recording device (20) and an illumination device (30) and is illuminated by same, whereby the image is evaluated using processing means (40) in such a way that defects of the molded part (10) and / or statistical deviations from a normal distribution are able to be determined, from which conclusions are able to be drawn about a manufacturing process of the molded parts (10) in a molding tool having a cavity, whereby the conclusions are able to be used to control the manufacturing process.

The invention provides a food pollution detection method based on multi-wavelength spectrophotometry, and the method comprises the steps: transmitting light in a series of wavelength ranges to a food sample through a tunable multi-wavelength light source system, generating spectral response, collecting the spectral response through a high-resolution spectrometer, and forming a multi-dimensional spectral image, a deep learning algorithm is used for analyzing, identifying and distinguishing subtle spectral differences between natural components and potential pollutants in a food sample, a preliminary identification result is obtained, a self-adaptive wavelength selection mechanism is implemented, wavelength output of a light source is dynamically adjusted, spectral response data is obtained, and the spectral response data is compared with a preset food safety standard database. According to the technical scheme provided by the invention, natural components and potential pollutants in a food sample are efficiently and accurately recognized, and the sensitivity, specificity and accuracy of pollutant detection are remarkably improved.

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 provides a detection system of a micro optical fiber coupler based on a bidirectional optical frequency comb vernier effect, which can be applied to the technical field of photoelectric detection. The system comprises: an optical frequency comb light source configured to emit detection light; the beam splitter is arranged to split the detection light into first sub-detection light and second sub-detection light; the reference sensing unit is arranged to guide the first sub detection light to interact with a reference solution through an evanescent field of the first micro optical fiber coupler so as to output first transmission light; the detection sensing unit is arranged to guide the second sub detection light to interact with the solution to be detected through an evanescent field of the second micro optical fiber coupler so as to output second transmission light; the beam combiner is set to combine the first transmission light and the second transmission light to obtain a combined light spectrum; the spectrum analyzer is set to collect the combined light and generate a vernier spectrum; and the processor is set to determine the concentration of the liquid to be detected according to the vernier spectrum.