304 results about "Evanescent wave" patented technology

The invention provides a deep frequency shift super-resolution microscopic imaging chip and a deep frequency shift super-resolution microscopic imaging system for omni-directional ultra-high wave vector illumination, and belongs to the technical field of optical super-resolution microscopy. The chip comprises a substrate plated with an adhesion layer and multiple layers of films on the adhesion layer, and sub-wavelength-scale circular ring gratings are engraved on the substrate and the adhesion layer; exciting light enters the circular ring grating through the substrate, and evanescent waves of ultrahigh wave vectors in all directions are generated through the circular ring grating. The evanescent waves are coupled to the upper surface through the multi-layer thin film to excite surface plasmons with ultrahigh transverse wave vectors in the corresponding direction, and the surface plasmons are used for carrying out all-directional ultrahigh wave vector illumination and deep frequency shift super-resolution microscopic imaging on a sample placed on the upper surface of the multi-layer thin film. The system comprises an excitation module, a deep frequency shift super-resolution microscopic imaging chip for omni-directional ultra-high wave vector illumination, an imaging module and an excitation control and image acquisition module. According to the invention, omni-directional ultra-high resolution imaging of a complex fine structure sample can be realized, so that application requirements in related fields can be met.

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 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.

The present invention discloses a nanoparticle transport device, comprising a silica substrate, a droplet-shaped gold nanoarray, polarized light waves, and nanoparticles; the silica substrate serves as a substrate; the droplet-shaped gold nanoarray is disposed on the silica substrate and serves as a driving unit, interacting with the polarized light field to form an excited local electric field to capture and directionally transport nanoparticles; the polarized light wave is used to provide a light source, interacting with the droplet-shaped gold nanoarray to generate an evanescent field; the nanoparticles serve as the objects to be captured and transported; the droplet-shaped gold nanoarray includes a periodically arranged droplet-shaped plasma gold nanostructure, which is composed of a droplet-shaped tail and a circular body, and the transport direction of the nanoparticles forms a certain angle with the droplet-shaped tail. The present invention can achieve more stable capture with lower light power, and also enables the device to achieve highly operational transport of target particles.

The invention discloses a surface plasmon resonance imaging system for expanding a dynamic range through a multi-mode optical path, and relates to the technical field of microscopic imaging, a laser outputs a monochromatic and linearly polarized continuous wave beam, a first dynamic beam deflection device performs dynamic angle deflection adjustment on the continuous wave beam, a prism is used for providing a total reflection interface, and a second dynamic beam deflection device is used for performing dynamic angle deflection adjustment on the continuous wave beam. Exciting an evanescent wave; a surface plasma resonance effect is generated through interaction of the SPR detection chip and evanescent waves, and sample characteristics are detected; the flow cell provides a sample flow channel, so that a sample is in full contact with the surface of the SPR detection chip; the second dynamic light beam deflection device cooperatively adjusts the propagation direction of reflected light on the surface of the SPR detection chip, and the imaging detection device captures a high-spatial-resolution SPR image formed by the reflected light and transmits the image to the upper computer in real time for processing and analysis. According to the invention, the change of the resonance angle can be tracked in real time, and high-sensitivity and high-resolution monitoring of the dynamic process of biomolecule interaction is realized.

The invention provides an optical fiber sensor, a preparation method thereof and an optical fiber sensing system.The optical fiber sensor comprises an optical fiber microstructure with an evanescent wave leakage part and an induction sensing layer, the induction sensing layer is used for inducing the evanescent wave leakage part to generate a loss mode resonance effect and conducting combination or adsorption on a sensing target, the induction sensing layer is made of a UIO-66-NH2 material, and the induction sensing layer is combined to the outer surface of the evanescent wave leakage part through a chemical modification method; the induction sensing layer of the metal organic framework film is combined on the outer surface of the evanescent wave leakage part in the optical fiber microstructure through a chemical modification method, and the induction sensing layer can induce the evanescent wave leakage part to generate a loss mode resonance effect and can also combine or adsorb a sensing target. Therefore, a sensing film corresponding to the target detection object does not need to be coated during subsequent biological sensing or other sensing, and the manufacturing cost of the optical fiber sensor based on the LMR effect is further reduced.

The invention discloses a method for measuring the surface temperature of a high-temperature solid structure based on ultrasonic evanescent wave amplitudes, which belongs to the field of nondestructive measurement and comprises the following steps: under different surface temperature conditions, exciting ultrasonic waves above the high-temperature solid structure, and measuring the ultrasonic evanescent wave amplitudes under different surface temperatures; determining the incidence relation between the ultrasonic evanescent wave amplitude and the temperature; and after the incidence relation between the amplitude of the ultrasonic evanescent wave and the temperature is determined, in subsequent ultrasonic detection, the temperature of the surface of the high-temperature solid structure is calculated by combining the measured amplitude of the ultrasonic evanescent wave with a predetermined incidence relation between the amplitude of the ultrasonic evanescent wave and the temperature. The method does not depend on radiation emitted by the surface of the measured material, can stably measure in a high-temperature or extremely-high-temperature environment, and is good in real-time performance.

The invention provides an antenna module and electronic equipment, and the antenna module comprises an antenna unit which comprises a first antenna and a second antenna which are arranged at an interval; the at least two isolation units are arranged between the first antenna and the second antenna and used for converting the propagation form of at least part of received electromagnetic waves radiated by the first antenna and / or the second antenna into evanescent waves so as to isolate target radiation signals between the first antenna and the second antenna; wherein at least one of two adjacent isolation units in the at least two isolation units is provided with a parasitic branch structure facing the opposite side.

The invention discloses an evanescent field driven miniature light wave actuator and a method. The actuator comprises a micro-nanofiber, a polymer fiber and a light source, the polymer fiber is in contact connection with one end of the micro-nanofiber, and the light source is arranged at the other end of the micro-nanofiber; the micro-nano optical fiber is a single-cone type micro-nano optical fiber, the single-cone type micro-nano optical fiber comprises a micro-nano optical fiber cone area located in the middle, a micro-nano optical fiber waist area located at one end and a micro-nano optical fiber tail fiber located at the other end, the polymer fiber is in contact connection with the outer surface of the micro-nano optical fiber waist area, and the light source is arranged near the tail end of the micro-nano optical fiber tail fiber. The principle of the method is that an evanescent field is generated around a micro-nano optical fiber waist region during light transmission, the temperature is raised under the action of a photo-thermal conversion material, and bending deformation of the actuator is caused due to the fact that thermal expansion coefficients of polymer fibers and the micro-nano optical fiber waist region are different. The method has the advantages of being high in controllability, high in response speed and the like, and can be conveniently applied to the fields of deep sea detection, miniature soft robots, in-vivo diagnosis and treatment and the like.

The invention provides an optical fiber sensor design based on an optical fiber Mach-Zehnder interferometer (MZI), and particularly relates to an in-fiber ladder-shaped special structure, which is particularly suitable for online monitoring of a reaction process in a microfluidic system and can measure refractive indexes of three points in the reaction process at the same time. The optical fiber sensor is formed by welding a common single-mode optical fiber, a coreless optical fiber and a stepped single-mode optical fiber. The broadband light source emits an optical signal through the single-mode optical fiber, a high-order mode excited in the coreless optical fiber enters a cladding of the single-mode optical fiber to be transmitted, due to the effect of an evanescent field and the influence of the environment refractive index and the temperature, the signal excites multiple modes in the optical fiber through the cascaded coreless optical fiber, and the high-order mode is transmitted in the cladding of the single-mode optical fiber. And an optical path difference is introduced through a step structure positioned between the two coreless optical fibers. When a solution to be detected is immersed into the stepped groove, the structure can generate refractive index change, and the propagation path of light can be adjusted by finely adjusting different sizes of the stepped groove to generate different phase differences, so that the light is coupled back into a fiber core of the single-mode fiber at the other end in the coreless fiber cascaded at the other end; and due to the special step-shaped structure, the refractive index values at three positions of the central step can be measured at the same time. According to the design, the structure of a traditional Mach-Zehnder interferometer is optimized, the number of elements is reduced, the stability and reliability of the system are improved, and the Mach-Zehnder interferometer is suitable for the fields of precision measurement, environment sensing, optical fiber communication and the like.

The invention discloses an underwater structure low-frequency radiation sound power forecasting method based on blind source separation, and the method comprises the following steps: (1), setting a housing sound source in a shallow sea environment, and obtaining discrete sound pressure; (2) obtaining an estimation signal of the source signal through a blind source separation algorithm; (3) windowing the estimated signal space data of the source signal in the z direction to obtain the sound pressure propagating outwards after windowing; (4) the sound pressure propagating outwards is converted into a wave number domain through discrete space Fourier transform, and a holographic surface sound pressure cylindrical wave spectrum is obtained; (5) filtering evanescent waves in a wavenumber domain by using a wavenumber domain filter to obtain propagation waves on a holographic surface; (6) transmitting the filtered sound pressure to a far field in a spherical shape through a near-field acoustical holography technology by means of stable-phase estimation; (7) deducing the sound intensity by using the far-field sound pressure so as to obtain the radiation sound power; according to the invention, the measurement workload is reduced; measurement is carried out on a holographic surface close to a sound source, the influence of boundary reflection is small, and a calculation result is accurate.

An antenna module includes an antenna unit and a first isolation unit. The antenna unit includes a first antenna and a second antenna arranged at an interval. The first isolation unit is arranged between the first antenna and the second antenna and configured to convert a transmission form of an electromagnetic wave coupled into the first isolation unit from the first antenna and / or the second antenna into an evanescent wave, to isolate a target signal between the first antenna and the second antenna.

An optomechanical system for transducing an optical phase shift movement including a mechanical sensor including a sensor element, the sensor element having an upper face extending mainly into a plane called longitudinal plane, when the system is at rest, the mechanical sensor being intended to receive an acoustic wave to vibrate the sensor element at a vibration frequency. The system moreover includes an optical detector capable of guiding a light radiation substantially parallel to the longitudinal plane, the optical detector having an evanescent field. The vibration of the sensor element modifies the evanescent field of the optical detector and the sensor element is moved along a direction called transverse direction, substantially perpendicular to the longitudinal plane when it vibrates.

The invention belongs to the technical field of integrated photonic devices, and particularly relates to an electric tuning silicon nitride waveguide multimode interference coupler based on a two-dimensional material covering layer. In order to solve the problem that an existing silicon nitride photonic device lacks effective electro-optical regulation and control capacity, a two-dimensional material covering layer (such as molybdenum disulfide and tungsten disulfide) is integrated on the surface of a silicon nitride waveguide, and an up-and-down structure of a metal electrode-two-dimensional material-silicon dioxide cladding-silicon nitride waveguide is constructed. When external bias voltage is applied, the effective refractive index of the waveguide mode is changed through evanescent field coupling by means of the electrical refraction effect of the two-dimensional material, and active regulation and control of the optical path of the silicon nitride waveguide without the thermo-optic effect are achieved. Compared with a lithium niobate-silicon nitride heterogeneous integration scheme, the two-dimensional material with the atomic layer thickness is compatible with the CMOS technology, a complex heterogeneous bonding technology is not needed, and the advantage of monolithic integration is achieved. The device is particularly suitable for a reconfigurable optical signal processing device in a silicon-based photon integrated circuit.

The present application relates to a kind of method and kit for detecting methylation cysteine total amount, belong to the field of biotechnology and analytical test.Utilize nucleic acid aptamer with high response to free Hcy, with moderate corresponding state Hcy to construct evanescent wave optical fiber sensor.Complementary strand and tHcy of fluorescently labeled are combined with the nucleic acid aptamer fixed on optical fiber with competition.Fluorescence signal drop value is positively correlated with tHcy concentration in serum.According to the percentage of fluorescence reduction, the tHcy concentration in serum is calculated.The present application detects tHcy only needs 1 microliter serum, after diluting 1000 times, detection is carried out, and the detection result is consistent with commercial enzyme cycle method.Compared with enzyme cycle method, the present application has the advantages of low price, optical fiber can be reused more than 30 times, detection speed is fast, fastest 5 minutes, does not need enzyme, equipment miniaturization, simple operation, etc., has excellent clinical application value.

A downhole fluid analysis system includes an optical sensor comprising, which includes a light source configured to emit light comprising a plurality of wavelengths, a light detector, and an optical tip through which at least a portion of the light travels and returns to the detector, wherein the incident angle of the light causes total internal reflection within the optical tip. The system further includes a piezoelectric helm resonator that generates a resonance response in response to an applied current, and an electromagnetic spectroscopy sensor positioned symmetrically with respect to the piezoelectric helm resonator in at least one direction. The light may be reflected in the optical tip at one or more reflection points, and each reflection point may generate an evanescent wave in a medium surrounding the optical tip. The light may be internally reflected in the optical tip at a plurality of reflection points.

Disclosed in the present invention are a prism-type total internal reflection imaging apparatus compatible with a commercial inverted microscope, and a method for using same. The method comprises the following steps: first injecting a sample into a sample cell; turning on a laser, and generated evanescent waves illuminating nearby fluorescent molecules to obtain an image; and processing the image to obtain the three-dimensional positions of all the fluorescent molecules in a visual field, obtaining the three-dimensional trajectories of the fluorescent molecules, calculating a mean square end-to-end distance and a diffusion factor of the trajectories, and obtaining a relative potential energy distribution curve on the basis of the relative positions of the molecules. The present invention can be compatible with a mainstream commercial inverted microscope, and does not need to carry out any refit on existing microscopes. A sample stage is mounted on the inverted microscope and an excitation light path module is mounted on the side edge of the sample stage, so that a total internal reflection light path having a specific wavelength can be generated. The apparatus can achieve single molecule positioning and three-dimensional tracking with a high signal-to-noise ratio, and the sample cell can be flexibly replaced before each test without influencing the total internal reflection light path. The apparatus is applied to the fields of life science, material analysis and the like.

This application provides a self-injection-locked narrow-linewidth laser with a quasi-continuous locking region, comprising: a semiconductor laser source for generating an initial linewidth laser and outputting it via end-face coupling; a photonic integrated microcavity chip including a bus waveguide and a microring resonator coupled to it via an evanescent wave, for receiving the initial linewidth laser and providing feedback light to the semiconductor laser through Rayleigh backscattering of the microring resonator to excite a self-injection-locking effect; the microring resonator is a compact folded waveguide microcavity with an ultra-low free spectral range, the free spectral range of which is less than a preset threshold, so that when the driving current of the semiconductor laser is changed for wavelength tuning, the self-injection-locking regions of adjacent resonant modes in the cavity physically overlap or are closely spliced ​​in the current tuning parameter space, so that the semiconductor laser can continuously transition between adjacent modes without experiencing permanent unlocking during continuous current tuning, forming a quasi-continuous locking region.

The invention relates to the field of optical fibers, in particular to a D-type optical fiber based on Fe3GaTe2 nanosheets and a preparation method and application of the D-type optical fiber. The invention discloses a D-type optical fiber based on a Fe3GaTe2 nanosheet. The D-type optical fiber comprises a D-type optical fiber and a Fe3GaTe2 layer deposited on a D-type plane of the D-type optical fiber. By utilizing the evanescent field characteristic of the D-type optical fiber, the Fe3GaTe2 nanosheet is deposited on the D-type plane of the D-type optical fiber, and magnetic anisotropy change (such as magnetization direction switching) is generated under the action of an external magnetic field, so that the effective refractive index of the optical fiber is changed; the change is converted into an optical path difference in the Michelson interferometer. Finally, the magnetic field intensity can be inverted by measuring the FSR change of the interference spectrum. The room-temperature MA adjustability of the Fe3GaTe2 nanosheets provides a larger refractive index change range (superior to that of magnetic fluid), and the nanosheets are not easy to degrade, so that the D-type optical fiber has higher sensitivity and temperature performance.

The present application relates to a kind of based on micro-nano fiber and scattering medium substrate coding element and speckle spectrometer.The coding element includes sealed cavity, micro-nano fiber and scattering medium substrate;Including drawstring transition zone and waist zone in the body of micro-nano fiber, drawstring transition zone forms leaky mode, waist zone generates evanescent field, the body of micro-nano fiber penetrates sealed cavity, so that drawstring transition zone and waist zone are located in sealed cavity;Scattering medium substrate is fixed in sealed cavity, and the waist zone of micro-nano fiber is overlapped on scattering medium substrate, scattering medium substrate is used to receive evanescent field and is coupled leaky mode to obtain scattering pattern information;Wherein, in the direction parallel to waist zone, scattering medium substrate includes more than two scattering zones, and the light transmittance of each scattering zone is different, and the difference between maximum light transmittance and minimum light transmittance is 20%~80%.Speckle spectrometer using the coding element of the present application has the advantages of small size, low cost while high spectral resolution.

The invention discloses a photoelectric hybrid long-period fiber grating sensor. The photoelectric hybrid long-period fiber grating sensor comprises a micro-nano optical fiber, polydimethylsiloxane and a laser-induced graphene electrode array, two ends of the micro-nano optical fiber are respectively used as an optical signal input port and an optical signal output port; the micro-nanofiber is packaged by polydimethylsiloxane and patterned by laser-induced graphene to form a periodically arranged laser-induced graphene electrode array, and the laser-induced graphene electrode array generates a periodic refractive index modulation effect on the middle area of the lower-layer micro-nanofiber and meets the phase matching condition of the long-period grating. And the micro-nano fiber long-period fiber grating is formed. The large evanescent field characteristic of the micro-nano fiber and the high refractive index sensitivity characteristic of the long-period grating can be fully utilized, the conductive electrode of the modulation grating is used for sensing application, and the functions of electrical detection and optical detection are achieved.

The application provides a visual micro-nano optical waveguide refractive index sensing system, and a hardware part comprises a nano fiber taper coupled fluorescent doped polymer microwire; the nano fiber taper coupled fluorescent doped polymer microwire is coupled by a nano fiber taper and a fluorescent doped polymer microwaveguide; the nano fiber taper is obtained by adopting a flame tapering method from a standard single-mode optical fiber; the fluorescent doped polymer microwaveguide is directly prepared by wire drawing from a mixed solution doped with a fluorescent dye; the nano fiber taper and the fluorescent doped polymer microwaveguide placed in a channel of an optical substrate jointly form an evanescent wave coupling structure; a signal analysis part enhances, edge extracts, smoothes and peak extracts a fluorescent image of the microwire through an image analysis algorithm, obtains an oscillation period of a fluorescent light path in the microwire under a current environment, establishes a response relationship between the light path period and the environmental refractive index, realizes direct real-time obtaining of environmental change conditions from optical images of a sensing unit shot by a camera, and thus obtains the change of the refractive index.

The application discloses a kind of optical fiber humidity sensor and its preparation scheme, optical fiber humidity sensor includes micro-nano optical fiber and porous film;Wherein: the micro-nano optical fiber, at least one bending part is formed;The porous film is coated on the surface of the bending part;The porous film surface has a plurality of holes, which is configured to be able to swell by water absorption, so that the duty cycle of hole becomes smaller.The present application utilizes the evanescent field of U-shaped micro-nano optical fiber to couple with the porous film to realize humidity sensing.Under different relative humidity environment, the size of the hole of the porous film on the surface of the U-shaped micro-nano optical fiber is different, so that the size of the energy scattered by it is different, and the change of the optical power at the output end of the optical fiber is different, thereby realizing humidity sensing.The present application has the advantages of high sensitivity, fast response speed, high repeatability and stability.

The invention discloses a surface plasma-based reverse Cherenkov medium laser accelerator, which is characterized in that a silicon medium prism, a first silver metal film, a first silicon medium film, a high-vacuum particle channel, a second silicon medium film, a second silver metal film and a silicon medium substrate are sequentially arranged from top to bottom to form a seven-layer metal-medium alternating structure; single-side incident laser excites surface plasma to realize particle acceleration. Incident electromagnetic waves are subjected to total internal reflection at the bevel edge of the prism, evanescent waves are generated, the longitudinal wave vector component of the evanescent waves meets the excitation condition of SPPs at the medium-metal layer interface, then the SPPs are excited on the metal-medium interface, and a remarkably enhanced near field is generated. The enhanced electric field forms longitudinal accelerating fields which are symmetrically distributed in the high-vacuum particle channel, and energy gain is continuously provided for electrons; meanwhile, the transverse electric field component is minimized in the central area of the channel due to mutual offset of upper and lower components, so that particle deflection is effectively inhibited.

This application discloses a fiber optic fluorescence level sensor based on evanescent waves, relating to the field of fiber optic sensing. The sensor includes: a light source module that outputs excitation light, which is sent to a fiber optic sensing unit to generate a fluorescence signal; a transmission fiber responsible for bidirectional signal transmission; a fiber optic sensing unit comprising a fiber optic strip D-groove structure, an encapsulation structure, a sensitive material, and a floating piston. The piston divides the encapsulation structure into two sections: the lower section contains the liquid to be measured, and the upper section integrates the sensitive material and the fiber optic strip D-groove structure. The piston floats synchronously with the liquid surface, changing the effective contact area between the sensitive material and the fiber optic strip D-groove structure, causing a regular change in the fluorescence intensity excited by the evanescent wave; a fiber optic spectrometer to acquire wavelength-intensity spectral information; and a computer module to perform data visualization, achieving real-time liquid level monitoring based on changes in fluorescence intensity. This sensor can improve upon the problems of existing fiber optic level sensors, such as complex fabrication, high cost, limited range, high equipment requirements, and poor adaptability to harsh environments.

The invention discloses a calibration-free gas sensing chip based on an infrared absorption spectrum technology. The calibration-free gas sensing chip comprises an on-chip laser light source, a transmission waveguide, an on-chip optical switch, a gas sensing waveguide array and an on-chip optical detector, the on-chip laser light source is arranged at the light input end of the transmission waveguide; the on-chip optical switch is arranged between the transmission waveguide and the gas sensing waveguide array; the gas sensing waveguide array is composed of a series of waveguides with different structural parameters, and light in the waveguides is in contact with environment gas through an evanescent field; and the on-chip optical detector is arranged at the light output end of the gas sensing waveguide array and is used for receiving the optical signal, converting the optical signal into an electric signal, inversely calculating the gas concentration through the electric signal and regulating and controlling the switching condition of the on-chip optical switch. The gas sensing chip has the gas concentration measurement advantages of high precision, self-calibration and the like, and lays a foundation for realizing the application of a miniaturized gas sensor.

A laser lithotripsy system may include a light energy source and a catheter. The catheter may comprise an optical fiber comprising a core and a cladding that encases the core. The optical fiber may be configured to be optically coupled to receive laser light from the light energy source. The optical fiber may include at least one evanescent portion and at least one non-evanescent portion. When light propagates through the core, an evanescent field may be transmitted out of the optical fiber in the evanescent portion and may not transmitted out of the optical fiber in the non-evanescent portion.

Optical states in TIR-based image displays may be modulated by movement of electrophoretically mobile particles into and out of the evanescent wave region at the interface of a high refractive index convex protrusions and a low refractive index medium. The movement of particles into the evanescent wave region may frustrate TIR and form dark states at pixels. Movement of particles out of the evanescent wave region may allow for TIR of incident light to form bright states at pixels. The movement of the particles may be controlled by employing the drive methods of pulse width modulation, voltage modulation or a combination thereof.

The embodiment of the invention relates to an optical assembly of an integrated waveguide and an optical chip. According to some embodiments of the present application, a waveguide-integrated optical assembly includes: a first waveguide having a first end; the second waveguide is provided with a second end and is parallel to the first waveguide, and the second end of the second waveguide is coupled with the first end of the first waveguide; the optical device is located in the second waveguide, and the surface of at least one of the first end of the first waveguide and the second end of the second waveguide is gradually shrunk in the tail end direction so that light can enter the second waveguide from the first waveguide in an evanescent wave coupling mode. Another embodiment of the invention provides an optical chip. The optical chip comprises one or more optical assemblies. The optical assembly of the integrated waveguide and the optical chip provided by the embodiment of the invention can effectively solve the problems encountered in the traditional technology.

The invention belongs to the technical field of power equipment monitoring, and particularly relates to an infrared optical fiber sensor for detecting the content of trace water in an oil sample and a detection device. According to the infrared optical fiber sensor, the structural design with the micro-fluidic chip is adopted, the hollow-core anti-resonance optical fiber subjected to tapering treatment is combined with the micro-fluidic chip, and the sensing performance is improved through cooperation of the hollow-core anti-resonance optical fiber and the micro-fluidic chip. The hollow-core anti-resonance optical fiber is subjected to tapering treatment, so that the transmission loss of infrared light is effectively reduced, the penetration depth of evanescent waves is enhanced, the detection sensitivity of the sensor on water in an oil sample is remarkably improved, and the detection limit can reach an extremely low level. And the micro-fluidic chip is used for accurately guiding the oil sample to flow through the optical fiber taper region to ensure that the sample to be detected is in full contact with the evanescent wave region, meanwhile, the sample consumption is reduced, and the detection efficiency is improved. Based on the principle that water molecules absorb infrared light, the detection of trace water in an oil sample has high selectivity, and interference of environmental factors such as temperature is avoided.