CN113533261A - Sensing system and detection method based on surface plasma resonance - Google Patents
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Abstract
The invention provides a sensing system and a detection method based on surface plasma resonance, wherein the sensing system comprises the following components in sequence along the light path direction: the device comprises a light source component, a wavelength division multiplexer, a sensor, a wavelength division demultiplexer and a spectrometer; the output light of the sensor is received by a spectrometer after passing through a wavelength division multiplexer, and the spectrometer analyzes the spectrum; wherein the sensor comprises an optical fiber; the outer surface of the optical fiber is coated with a first coating, the outer surface of the first coating is coated with a second coating, and the sensor receives modulated linearly polarized light and pumping light to excite the first coating to generate surface plasma resonance. The design of the sensing probe and the pump light control improve the sensitivity of sensing to the detection of various environmental parameters, widen the use environment measured by the sensing probe, simultaneously realize that one sensor simultaneously measures a plurality of environmental parameters and solve the problem of multi-parameter cross sensitivity.
Description
Technical Field
The invention relates to the technical field of optical fiber sensing, in particular to a sensing system and a detection method based on surface plasmon resonance.
Background
The design of fiber SPR sensors using wavelength modulation was first proposed by Jorgenson et al. With the development of optical fiber technology, as optical fibers have the advantages of small size, low loss, suitability for long-distance transmission and the like, more and more sensors using optical fiber cores to replace prisms are researched and applied to various aspects of biology, medicine, food safety, industry and the like. The optical fiber is divided into a multimode optical fiber and a single mode optical fiber, and the optical fiber SPR sensor is divided into an online transmission type structure and a terminal reflection type structure. Removing a cladding of a sensing area of the optical fiber, plating a metal film with a certain thickness on the surface of the fiber core, generating evanescent waves on the surfaces of the fiber core and the metal film by light coupled from an incident end of the optical fiber to excite surface plasma resonance, receiving the transmission spectrum of an emergent end of the optical fiber by a spectrometer to obtain a spectrum curve presenting a valley, wherein the wavelength corresponding to the lowest point is the resonance wavelength, which indicates that the surface plasma phenomenon is most remarkable at the wavelength. The characteristic parameters of the resonance peak are not only related to the type and thickness of the metal film, but also related to the parameters of the optical fiber and the size of the refractive index of the external environment.
Sensing technology, communication technology and computer technology are three major pillars of modern information technology, and Surface Plasmon Resonance (SPR), which is a novel sensing technology, has been widely used in the fields of biotechnology, drug screening, clinical diagnosis, food detection and environmental detection, membrane biology and the like due to its advantages. The SPR sensing technology is mainly applied to the detection aspect, and compared with the traditional detection method, the method has the advantages of real-time and quick detection, no need of marking samples, short time for analyzing a complex system, convenient and quick detection process, high sensitivity, capability of detecting in turbid or opaque samples and the like, so that the development and research work of the SPR sensing technology is rapidly developed in recent years. The commercialization of SPR Sensors has been successfully carried out by foreign researchers, such as Biacore Instruments of various types manufactured by Biacore AB of Sweden, Iasys products manufactured by Affinity Sensors of the United states, TISPR Instruments manufactured by Texas Instruments Dallas of the United states, and the like. Compared with the development of foreign SPR sensor products, the research and development of domestic SPR sensor products are still in the initial stage, the manufacturing aspect of instruments is relatively lagged, and more researches on the SPR sensor products are needed. The research and development of the optical fiber SPR sensor at present mainly have two major directions, one is the design and development of the optical fiber SPR sensor with a novel structure, and the method aims to obtain detection equipment with high sensitivity, high detection precision and strong universality; and secondly, the popularization of the application field of the optical fiber SPR sensing is focused on the fusion of the integrated testing technologies in various fields. At present, compared with the traditional prism-type SPR sensor, the optical fiber SPR sensor is still in research and improvement in aspects of detection environment limit, sensitivity, stability and the like, and a plurality of sensors with structures are developed and researched by combining the applications in various fields. The existing sensor has the problems of single detection on various environmental parameters, low sensitivity, narrow detection range of high environmental parameter sensitivity, single applicable environment and multi-parameter cross sensitivity.
Disclosure of Invention
The invention provides a sensing system based on surface plasma resonance, which aims to solve the problems of single detection of environmental parameters, low sensitivity, narrow detection range of environmental parameters and high sensitivity, single applicable environment and multi-parameter cross sensitivity in the related art.
The second purpose of the invention is to provide a detection method based on surface plasma resonance.
In an optional aspect of the present application, first, a sensing system based on surface plasmon resonance includes, sequentially arranged along a light path direction: the device comprises a light source component, a wavelength division multiplexer, a sensor, a wavelength division demultiplexer and a spectrometer;
the output light of the sensor is received by a spectrometer after passing through a wavelength division multiplexer, and the spectrometer analyzes the spectrum; the sensor comprises an optical fiber, a first plating layer and a second plating layer; the outer surface of the optical fiber is coated with a first coating, the outer surface of the first coating is coated with a second coating, and the sensor receives modulated linearly polarized light and pump light and excites the first coating to generate surface plasma resonance.
In an alternative aspect of the present application, a light source assembly comprises: the device comprises a signal light source, a polarizer, a polarization controller and a pumping light source, wherein the signal light source outputs an incident light signal which is converted into linearly polarized light through the polarizer; the pump light source outputs pump light; the wavelength division multiplexer receives the pump light and the linearly polarized light at the same time, the linearly polarized light is adjusted in polarization direction through the polarization controller, and the second coating is adjusted by the pump light output by the pump light source.
In an alternative aspect of the present application, the optical fiber includes at least one of a single mode fiber, a multimode fiber, a tapered fiber, a U-shaped fiber, a D-shaped fiber, a hollow core fiber, and a photonic crystal fiber.
In an optional scheme of the application, the sensor further comprises a fiber grating, the fiber grating couples the linearly polarized light passing through the fiber core and the pump light to the cladding, and the first cladding is excited to generate surface plasmon resonance.
In an alternative aspect of the present application, the second plating layer is a two-dimensional material, and includes at least one of graphene, a two-dimensional transition metal sulfide, a blackscale, an MXene material, hexagonal boron nitride, graphite-phase carbon nitride, a layered metal oxide, and a layered double oxide.
In an alternative aspect of the present application, the first plating layer comprises: at least one of a metal, a metal oxide, a multi-metal mixture, a metal and metal oxide mixture, a two-dimensional material.
In an alternative aspect of the present application, the metal comprises: at least one of gold, silver, aluminum, copper, cobalt; the metal oxide includes: at least one of titanium dioxide and zinc oxide; when the first plating layer is a metal, the second plating layer includes: at least one of graphene and tungsten disulfide.
On the other hand, the embodiment of the invention also provides a detection method based on surface plasmon resonance, which comprises the following steps:
outputting polarized light and pumping light;
linearly polarized light and pumping light are input into a sensor through a wavelength division multiplexer;
controlling a sensor to sense an external environment;
the output light of the sensor enters a spectrometer through a wavelength division multiplexer;
the data is analyzed by the spectrometer and the sensor is adjusted based on the data.
In the embodiment of the present invention, outputting the polarized light and the pump light includes: the signal light source outputs incident light, and the incident light is converted into linearly polarized light through the polarizer; the polarization controller adjusts the polarization direction of the linearly polarized light; outputting pump light by a pump light source
In an alternative aspect of the present application, analyzing the data and adjusting the sensor based on the data by the spectrometer comprises: adjusting the second plating layer according to the pump light; the regulation and control of the pump light source to output the pump light is determined according to the analysis data of the spectrometer.
In the foregoing technical solution, embodiments of the present invention provide a sensing system based on surface plasmon resonance, where a second coating of a sensor in the sensing system is regulated and controlled by adding pump light to a light source assembly, so that certain characteristics of an environment and the second coating on a sensor optical fiber are changed, and a surface plasmon resonance environment excited by a first coating in a sensing probe can be closer to a most sensitive measurement region of the sensing probe, thereby further improving the sensitivity of sensing for detecting various parameters of the environment. When the external environment condition changes, the second coating and the pumping light source are adjusted, so that the surface plasma resonance environment excited by the first coating in the sensing probe is closer to the most sensitive measurement region of the sensing probe, and the sensing detection region range of the sensing probe is widened.
Through the design of adjustment sensing probe, like the shape of the optic fibre of design difference, use different optic fibre types, carve into different kinds of grating, use different first cladding material, realize detecting the relevant parameter of environment in various different environment, after sensing probe was produced simultaneously, can also widen sensing probe measuring service environment through adjusting second cladding material and pump light source.
Certain characteristics of the environment and the second coating are changed through the regulation and control of the pump light, so that one sensor can simultaneously measure a plurality of environment parameters and the problem of multi-parameter cross sensitivity can be solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a schematic representation of a connection topology of a sensing system provided by an embodiment of the present invention;
FIG. 2 schematically illustrates a schematic structural diagram of a sensor according to an embodiment of the invention;
FIG. 3 schematically illustrates a block diagram of a particular sensing system provided in accordance with a second embodiment of the invention;
FIG. 4 is a schematic view showing the structure of a sensor according to a second embodiment of the present invention;
FIG. 5 schematically illustrates a flow chart of a detection method of a surface plasmon resonance based sensing system according to an embodiment of the invention;
FIG. 6 schematically shows a detailed flowchart of step S100 in the detection method of the surface plasmon resonance-based sensing system according to the embodiment of the invention; and
fig. 7 schematically shows a detailed flowchart of step S500 in the detection method of the surface plasmon resonance-based sensing system according to the embodiment of the invention.
Description of the reference numerals
100. A sensing system;
10. a light source assembly; 30. a sensor; 40. a wavelength division multiplexer; 50. a spectrometer;
101. a signal light source; 102. a polarizer; 103. a polarization controller; 104. a pump light source;
301. an optical fiber; 302. a first plating layer; 303. and (5) second plating.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
A sensing system based on surface plasmon resonance is proposed. The sensor aims to solve the problems that in the prior art, the sensor is single in detection of all environmental parameters, not high enough in sensitivity, narrow in detection range of the environmental parameters and high in sensitivity, single in applicable environment and multi-parameter cross-sensitive.
[ EXAMPLES one ]
Referring to fig. 1, fig. 1 schematically shows a connection topology of a sensing system provided by an embodiment of the present invention, the sensing system 100 includes:
a light source assembly 10 for generating and outputting linearly polarized light and pump light;
the wavelength division multiplexer 20 is configured to receive the linearly polarized light and the pump light emitted by the light source assembly 10, and transmit the linearly polarized light and the pump light to the sensor 30;
the sensor 30 receives and outputs the linearly polarized light and the pump light, and the linearly polarized light and the pump light are received by the spectrometer 50 after passing through the wavelength division multiplexer 40;
the wavelength division multiplexer 40 is connected with the sensor 30 and the spectrometer 50, receives the signal output by the sensor 30 and transmits the signal to the spectrometer 50;
a spectrometer 50 for analyzing the spectrum to adjust the sensor by the spectrum.
Specifically, the light source assembly 10 may produce two different light signals, i.e., linearly polarized light and pump light, and under normal conditions, the light signals with different wavelengths are combined into one beam and incident on the wavelength division combiner 20, and transmitted along a single optical fiber; the wavelength division multiplexer 20 separates the optical signals (linearly polarized light and pump light) with different wavelengths at the receiving end, and transmits the optical signals to the sensor 30. The signal transmitted by the sensor 30 is sent to the spectrometer 50 at the back end of the sensor 30 by the demultiplexer 40, and the spectrum is then analyzed by the spectrometer 50.
It will be appreciated that in the direction of propagation of the light emitted by the light source assembly 10, the light oscillates as a vector in only one fixed direction, which is referred to as plane polarized light, since the locus of the end points of the light vector is a straight line, which is also referred to as linearly polarized light. The plane formed by the direction of the light vector and the propagation direction of the light is called a vibration plane. The vibration plane of the linearly polarized light is fixed and can not rotate, and the pump light can be similar to a laser. The above-mentioned sensing system 100 provided by the embodiment of the present invention uses the optical path to connect the above devices, which is a common technical means understood by those skilled in the art, and is not more than illustrated here in the implementation of the present invention.
Referring to fig. 2, fig. 2 schematically shows a structural diagram of a sensor according to an embodiment of the present invention, and further, the sensor 30 includes an optical fiber 301, a first plating layer 302, and a second plating layer 303; the outer surface of the optical fiber 301 is coated with a first coating 302, the outer surface of the first coating 302 is coated with a second coating 303, the sensor 30 receives the modulated linearly polarized light and the pump light, that is, the amount output by the wavelength division multiplexer 20 excites the first coating 302 to generate surface plasmon resonance.
Wherein the second plating layer 303 is a two-dimensional material comprising: at least one of graphene, a two-dimensional transition metal sulfide, black scale, MXene material, hexagonal boron nitride, graphite phase carbon nitride, a layered metal oxide, and a layered bimetal oxide.
It is understood that the two-dimensional material used for the second plating layer 302 refers to a material in which electrons can move freely (planar motion) only in two dimensions of nanometer scale (1-100 nm).
The first plating layer 302 includes: at least one of a metal, a metal oxide, a multi-metal mixture, a metal and metal oxide mixture, a two-dimensional material.
Wherein the metal comprises: at least one of gold, silver, aluminum, copper, cobalt; the metal oxide includes: at least one of titanium dioxide and zinc oxide;
in a general inventive concept provided in the embodiments of the present invention, the second plating layer 303 of the sensor 30 in the sensing system 100 is adjusted and controlled by adding pump light to the light source assembly 10, so that certain characteristics of the environment and the second plating layer 303 on the optical fiber 301 of the sensor 30 are changed, the surface plasmon resonance environment excited by the first plating layer 302 in the sensing probe can be closer to the most sensitive measurement region of the sensing probe, and the sensitivity of sensing to various parameters of the environment is further improved. When the external environment changes, the second plating layer 303 and the pumping light source are adjusted to make the surface plasma resonance environment excited by the first plating layer 302 in the sensing probe closer to the most sensitive measurement region of the sensing probe, thereby widening the sensing detection region range of the sensing probe.
[ example two ]
Referring to fig. 3 and 4, fig. 3 is a block diagram schematically illustrating a specific sensing system according to a second embodiment of the present invention; fig. 4 schematically shows a schematic structural diagram of a sensor according to a second embodiment of the invention. In a particular embodiment, the light source assembly 10 includes: a signal light source 101, a polarizer 102, a polarization controller 103, and a pump light source 104; the signal light source 101 outputs an incident light signal, and the incident light signal is converted into linearly polarized light through the polarizer 102; the pump light source 104 outputs pump light; the wavelength division multiplexer 20 receives the pump light and the linearly polarized light at the same time, the linearly polarized light is adjusted in the polarization direction by the polarization controller, and the second plating layer 303 is adjusted by the pump light output by the pump light source 104.
It is understood that the incident light is converted into linearly polarized light by the Polarizer 102 (Polarizer) refers to a device for obtaining polarized light from natural light emitted by the signal light source), the polarization controller 103 can be used to adjust the polarization direction of the linearly polarized light, the pump light source 104 outputs pump light, the modulated linearly polarized light and pump light are input into the sensor 30 through the wavelength division multiplexer 20, and the output light of the sensor 30 passes through the wavelength division multiplexer 40 and then is received by the spectrometer 50 and begins to analyze the spectrum.
In one embodiment, the sensing system 100 can analyze various environmental parameters in the surrounding environment by analyzing the data of the spectrometer 50, and regulate and control the related structure of the sensor 30 by regulating and controlling the pumping light source 104, so as to further improve the sensitivity of sensing various environmental parameters, widen the sensing detection range of the sensor 30, widen the use environment measured by the sensor 30, and detect the effects of various environmental parameters.
In detecting different detection environments and different parameters, the design can be pertinently designed according to actual needs, that is, in solid detection, liquid detection and gas detection, or in environment composition detection, environment refractive index detection and environment temperature detection, different sensors can be designed for different conditions to detect, but whatever the sensor 30 is used, as long as the pump light output by the pump light source is adjusted, the detection sensitivity of the sensing to each parameter of the environment can be further improved, the sensing detection interval range of the sensor 30 is widened, the use environment measured by the sensor 30 is widened, and the effect of detecting various environment parameters is realized.
Referring to fig. 4, the sensor 30 includes an optical fiber 301, a first plating layer 302, and a second plating layer 303; the outer surface of the optical fiber 301 is coated with a first coating 302, the outer surface of the first coating 302 is coated with a second coating 303, the sensor 30 receives the modulated linearly polarized light and the pump light, that is, the amount output by the wavelength division multiplexer 20 excites the first coating 302 to generate surface plasmon resonance, wherein the second coating 303 is adjusted by the pump light output by the pump light source.
The second plating layer 303 is regulated by the pump light, so that the sensor 30 can be regulated, and the related performance of the sensor 30 can be regulated only by regulating the pump light output by the pump light source 104.
Furthermore, the optical fiber 301 may be various, different types of optical fibers may be used in different environments, materials and components of the optical fiber may be changed, and different shapes may be designed to specifically design the optical fiber according to actual conditions.
In one embodiment, the optical fiber 301 may comprise at least one of a single mode fiber, a multimode fiber, a tapered fiber, a U-shaped fiber, a D-shaped fiber, a hollow core fiber, and a photonic crystal fiber.
In some improved embodiments, in order to adapt to different environments and detect different parameters, besides different types of optical fibers, gratings can be engraved in the optical fibers, different gratings can achieve different effects, the refractive index of the gratings can be modulated, the interval and the inclination angle of the gratings can be changed, and different purposes can be achieved through special design of the gratings in different situations.
As in one embodiment, the sensor 30 may further include a fiber grating (widget, not shown) that couples the modulated linearly polarized light of the core and the pump light to the cladding layer, exciting the first cladding layer to produce surface plasmon resonance. The method is adaptively set according to the environment of the sensor and the hardware configuration.
When pump light is regulated and controlled to second cladding material 303, different second cladding material 303 can produce different effects, possess different material parameters, in different fields, the material of adoption is also different, can adopt different second cladding material 303 according to actual need, simultaneously, can adopt different second cladding material 303 to make up.
In one embodiment, different numbers of second plating layers 303 can be used, all to achieve different results.
In a particular embodiment, the second plating layer 303 includes at least one of graphene, two-dimensional transition metal sulfide, alexandrite, MXene material, hexagonal boron nitride, graphite phase carbon nitride, layered metal oxide, layered bimetallic oxide.
In the sensor 30, a material capable of generating a surface plasmon resonance effect is required, and in different environments and different detection requirements, a suitable material can be selected according to actual conditions to design material parameters and achieve specific requirements.
In one embodiment, the first plating layer 302 may include: at least one of a metal, a metal oxide, a multi-metal mixture, a metal-metal oxide mixture, a metal oxide mixture, and a second plating layer.
Wherein the metals include: at least one of gold, silver, aluminum, copper, cobalt; the metal oxide includes: at least one of titanium dioxide and zinc oxide; the second plating layer includes: at least one of graphene and tungsten disulfide.
It should be noted that, according to experimental and practical analysis results, when the first plating layer 302 is a metal, applicable materials of the second plating layer 303 include: at least one of graphene and tungsten disulfide.
It is understood that the above materials and data obtained by experimental analysis and the required intelligence, and therefore all simple combinations and substitutions of isotopes, which can be made by the above materials and equivalents thereof, are within the scope of the invention as defined by the appended claims.
Therefore, in the second embodiment of the present invention, a sensing system 100 is provided, in which the second plating layer 303 of the sensor 30 is regulated and controlled by adding pump light to the light source assembly 10, so that certain characteristics of the environment and the second plating layer 303 on the optical fiber 301 of the sensor 30 are changed, the surface plasmon resonance environment excited by the first plating layer 302 in the sensing probe is closer to the most sensitive measurement region of the sensing probe, and the sensitivity of sensing to various parameters of the environment is further improved. When the external environment condition changes, the second plating layer 303 and the pumping light source can be adaptively adjusted according to the data analyzed by the spectrum, so that the surface plasma resonance environment excited by the first plating layer 302 in the sensing probe is closer to the most sensitive measurement region of the sensing probe, and the sensing detection region range of the sensing probe is widened.
[ EXAMPLE III ]
Referring to fig. 5, fig. 5 is a flow chart schematically illustrating a detection method of a surface plasmon resonance-based sensing system according to an embodiment of the invention. As shown in fig. 5, in an embodiment of the present invention, a method for detecting a sensing system based on surface plasmon resonance is provided, which mainly includes the following steps:
in step S100, output linear polarized light and pump light.
Step S200, linearly polarized light and pump light are input into a sensor through a wavelength division multiplexer;
step S300, controlling a sensor to sense an external environment;
step S400, the output light of the sensor enters a spectrometer through a wavelength division multiplexer;
and S500, adjusting the sensor according to the analysis data of the spectrometer.
In one embodiment, through the above steps, a specific value of a parameter in the environment can be obtained by analyzing data on the spectrometer, so as to realize environment sensing.
Referring to fig. 6, fig. 6 schematically shows a detailed flowchart of step S100 in the detection method of the surface plasmon resonance-based sensing system according to the embodiment of the invention;
the output polarized light and the pump light include:
s101, outputting incident light through a signal light source, wherein the incident light is converted into linearly polarized light through a polarizer;
s102, adjusting the polarization direction of linearly polarized light by a polarization controller;
and step S103, outputting pump light through a pump light source.
Referring to fig. 7, fig. 7 schematically shows a detailed flowchart of step S500 in the detection method of the surface plasmon resonance-based sensing system according to the embodiment of the invention; considering the complexity of the environment and the influence of different environments on the sensing effect of the sensing system, the sensing sensitivity of sensing to various parameters of the environment can be further improved by regulating and controlling the pump light, the sensing detection range of the sensing probe is widened, and the use environment measured by the sensing probe is widened. Step S500, analyzing the data by the spectrometer and adjusting the sensor according to the data
Step S304, analyzing data through the received output light of the sensor;
step S305, determining pump light according to the analysis data;
and step S306, adjusting the second plating layer by pumping light.
In one embodiment, the detection sensitivity of the sensor to various environmental parameters can be further improved by adjusting the pump light, the sensing detection range of the sensing probe is widened, the use environment measured by the sensing probe is widened, and the method is suitable for wider use scenes.
In addition, the pumping light source can be adjusted according to actual conditions, so that a better sensing effect is achieved, multi-parameter sensing is realized, and the problem of cross sensitivity among multiple parameters is solved.
In one embodiment, the detection method further comprises that the regulation of the output pump light by the pump light source is determined according to the analysis data of the spectrometer.
In summary, the control method provided by the embodiment of the invention utilizes the method and the control flow which can rapidly judge the best brightness of the sensing device in real time. The integrated idea is utilized, deep learning and the special scene are organically combined together, the real-time, rapid and accurate control of the light brightness can be achieved at the equipment end, continuous loop iteration optimization can be achieved, and a set of complete decision control flow is provided. Therefore, network bandwidth can be saved, server pressure is relieved, and better experience is brought to users.
And the pump light can be added in the light source component for regulation and control, so that certain characteristics of the environment and the second coating on the optical fiber of the sensor are changed, the surface plasma resonance environment excited by the first coating in the sensing probe is closer to the most sensitive measurement region of the sensing probe, and the detection sensitivity of the sensing to various parameters of the environment is further improved. When the external environment condition changes, the second coating and the pumping light source can be adaptively adjusted according to the data analyzed by the spectrum, so that the surface plasma resonance environment excited by the first coating in the sensing probe is closer to the most sensitive measurement interval of the sensing probe, and the sensing detection interval range of the sensing probe is widened.
It will also be understood by those skilled in the art that if the control method or processor provided by the present invention is simply changed, or if the functions added to the above method are combined or replaced on the device, such as the replacement of model materials for each component, the replacement of use environment, the simple replacement of the positional relationship between each component, etc.; or the products formed by the components are integrally arranged; or a detachable design; it is within the scope of the present invention to replace the methods and apparatus of the present invention with any method/apparatus/device that combines the components to form a method/apparatus/device with specific functionality.
The fifth embodiment of the invention also provides a sensing device which comprises the sensing system. It should be understood that the sensing device is not limited to size and shape, and only needs to utilize corresponding components of the processor to achieve the same or similar functions, and all such components are within the scope of the present invention.
The processor further comprises a memory, the detection method for the sensing system can be stored in the memory as a program unit, and the processor executes the program unit stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more, and light supplement is carried out on the detection method for the sensing system by adjusting kernel parameters.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) or a non-volatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention also provides a machine-readable storage medium on which a program is stored, which, when executed by a processor, implements a detection method for a sensing system.
The embodiment of the invention also provides a processor, wherein the processor is used for running the program, and the detection method for the sensing system is executed when the program runs.
An embodiment of the present invention further provides a computer program product, which includes a computer program, and the computer program, when executed by a processor, implements the detection method for a sensing system described above.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow or block of the flowchart illustrations or block diagrams, and combinations of flows or blocks in the flowchart illustrations or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processor to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processor, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processor to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processor to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A sensing system based on surface plasmon resonance, comprising, arranged in sequence along an optical path: the device comprises a light source component, a wavelength division multiplexer, a sensor, a wavelength division demultiplexer and a spectrometer;
the light source assembly outputs linearly polarized light and pumping light, the linearly polarized light and the pumping light are input into the sensor through the wavelength division multiplexer, the output light of the sensor is received by the spectrometer after passing through the wavelength division multiplexer, and the spectrometer analyzes a spectrum;
wherein the sensor comprises an optical fiber; the outer surface of the optical fiber is plated with the first coating, the outer surface of the first coating is coated with the second coating, and the sensor receives the modulated linearly polarized light and the pump light to excite the first coating to generate surface plasma resonance.
2. The surface plasmon resonance-based sensing system of claim 1, wherein said light source assembly comprises: the device comprises a signal light source, a polarizer, a polarization controller and a pumping light source, wherein the signal light source outputs an incident light signal which is converted into the linearly polarized light through the polarizer; the pump light source outputs the pump light; wherein wavelength division multiplexer receives simultaneously pump light with linearly polarized light, linearly polarized light via the polarization controller adjusts polarization direction, just the second cladding receives the pump light of pump light source output adjusts.
3. The surface plasmon resonance-based sensing system of claim 1, wherein said optical fiber comprises at least one of a single mode fiber, a multimode fiber, a tapered fiber, a U-shaped fiber, a D-shaped fiber, a hollow core fiber, and a photonic crystal fiber.
4. The surface plasmon resonance-based sensing system of claim 1, wherein said sensor further comprises a fiber grating, said fiber grating coupling said linearly polarized light through the fiber core and said pump light into the cladding, exciting said first cladding to produce surface plasmon resonance.
5. The surface plasmon resonance-based sensing system of claim 1, wherein the second coating is a two-dimensional material comprising at least one of graphene, a two-dimensional transition metal sulfide, tridymite, an MXene material, hexagonal boron nitride, graphite-phase carbon nitride, a layered metal oxide, a layered double oxide.
6. The surface plasmon resonance-based sensing system of claim 5, wherein said first coating comprises: at least one of a metal, a metal oxide, a multi-metal mixture, a metal and metal oxide mixture, a two-dimensional material.
7. The surface plasmon resonance-based sensing system of claim 6, wherein said metal comprises: at least one of gold, silver, aluminum, copper, cobalt; the metal oxide includes: at least one of titanium dioxide and zinc oxide; when the first plating layer is a metal, the second plating layer includes: at least one of graphene and tungsten disulfide.
8. A surface plasmon resonance-based detection method, which is applied to the surface plasmon resonance-based sensing system according to any one of claims 1-7, and which comprises:
outputting the linearly polarized light and the pumping light;
inputting the linearly polarized light and the pumping light into the sensor through the wavelength division multiplexer;
controlling the sensor to sense the external environment;
the output light of the sensor enters the spectrometer through the wavelength division multiplexer;
the sensor is adjusted by analyzing data from the spectrometer and based on the data.
9. The surface plasmon resonance-based detection method of claim 8, wherein said outputting of line polarized light and said pumping light comprises:
outputting incident light through the signal light source, wherein the incident light is converted into the linearly polarized light through the polarizer;
the polarization controller adjusts the polarization direction of the linearly polarized light;
outputting the pump light by the pump light source.
10. The surface plasmon resonance-based detection method of claim 8 wherein said analyzing data by said spectrometer and adjusting the sensor based on said data comprises:
analyzing data by the received output light of the sensor;
determining the pump light from the analysis data;
the second plating layer is adjusted by the pump light.
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| CN202110287874X | 2021-03-17 | ||
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