CN113533261B - Sensing device and detection method based on surface plasmon resonance - Google Patents
Sensing device and detection method based on surface plasmon resonance Download PDFInfo
- Publication number
- CN113533261B CN113533261B CN202110881329.3A CN202110881329A CN113533261B CN 113533261 B CN113533261 B CN 113533261B CN 202110881329 A CN202110881329 A CN 202110881329A CN 113533261 B CN113533261 B CN 113533261B
- Authority
- CN
- China
- Prior art keywords
- sensor
- light
- pump light
- coating
- linearly polarized
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 238000002198 surface plasmon resonance spectroscopy Methods 0.000 title claims abstract description 41
- 239000011248 coating agent Substances 0.000 claims abstract description 54
- 238000000576 coating method Methods 0.000 claims abstract description 54
- 239000013307 optical fiber Substances 0.000 claims abstract description 43
- 238000001228 spectrum Methods 0.000 claims abstract description 11
- 239000000835 fiber Substances 0.000 claims description 31
- 238000007747 plating Methods 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 21
- 229910044991 metal oxide Inorganic materials 0.000 claims description 20
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 230000010287 polarization Effects 0.000 claims description 17
- 150000004706 metal oxides Chemical class 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 238000005253 cladding Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 229910021389 graphene Inorganic materials 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000007613 environmental effect Effects 0.000 claims description 6
- 229910052582 BN Inorganic materials 0.000 claims description 4
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 241000316887 Saissetia oleae Species 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- 229910052723 transition metal Inorganic materials 0.000 claims description 4
- -1 transition metal sulfide Chemical class 0.000 claims description 4
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000004038 photonic crystal Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000000523 sample Substances 0.000 abstract description 29
- 230000035945 sensitivity Effects 0.000 abstract description 22
- 238000013461 design Methods 0.000 abstract description 8
- 230000033228 biological regulation Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 14
- 238000004590 computer program Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 238000003860 storage Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 239000003814 drug Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003759 clinical diagnosis Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000013135 deep learning Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
- G01N21/553—Attenuated total reflection and using surface plasmons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a sensing system and a detection method based on surface plasmon resonance, wherein the sensing system comprises the following components in sequence along the direction of a light path: the device comprises a light source assembly, a wavelength division multiplexer, a sensor, a wavelength division demultiplexer and a spectrometer; the light source component outputs linearly polarized light and pump light, the linearly polarized light and the pump 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 demultiplexer, 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 the modulated linearly polarized light and the pump light so as to excite the first coating to generate surface plasma resonance. The design of the sensing probe and the pump light regulation and control improve the detection sensitivity of sensing on all parameters of the environment, widen the use environment measured by the sensing probe, simultaneously realize that one sensor simultaneously measures a plurality of environment parameters and can 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 device and a detection method based on surface plasmon resonance.
Background
It was first proposed by Jorgenson et al to design an optical fiber SPR sensor using wavelength modulation. With the development of optical fiber technology, as optical fibers have the advantages of small volume, small 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 multimode optical fiber and single mode optical fiber, and the optical fiber SPR sensor is divided into an on-line transmission type structure and a terminal reflection type structure. Removing a cladding of a sensing area of an optical fiber, plating a metal film with a certain thickness on the surface of a 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 plasmon resonance, receiving a transmission spectrum of an emergent end of the optical fiber by a spectrometer to obtain a spectrum curve showing a valley, wherein the wavelength corresponding to the lowest point is the resonance wavelength, and the surface plasmon phenomenon is most remarkable at the wavelength. The characteristic parameters of the formants are related to the type and thickness of the metal film, parameters of the optical fiber and the magnitude of the refractive index of the external environment.
The sensing technology, the communication technology and the computer technology are three main posts of the modern information technology, and the surface plasmon resonance (surface plasmon resonance, SPR) serving as the novel sensing technology is widely applied in the fields of biotechnology, medicine screening, clinical diagnosis, food detection, environment detection, membrane biology and the like due to the advantages of the surface plasmon resonance (surface plasmon resonance, SPR) as the novel sensing technology. Compared with the traditional detection method, the SPR sensing technology has the advantages of real-time and rapid detection, no need of marking samples, short time for analyzing complex systems, convenient and rapid 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 has been developed rapidly in recent years. Research on SPR sensing technology has been carried out by foreign researchers, and commercialization of SPR Sensors has been quite successful, such as various types of SPR instruments Biacore manufactured by Biacore AB, sweden, iasys manufactured by Affinity Sensors, U.S. A.3924, TISPR manufactured by Texas Instruments Dallas, etc. Compared with the development of foreign SPR sensor products, the development of the domestic SPR sensor products is still in a starting stage, the instrument manufacturing aspect is relatively backward, and more researches are required to be developed. The research and development of the optical fiber SPR sensor at present mainly has two major directions, namely the design and development of the optical fiber SPR sensor with a novel structure are focused on obtaining detection equipment with high sensitivity, high detection precision and strong universality; secondly, the popularization of the application field of the optical fiber SPR sensor is aimed at the fusion of 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 the aspects of detection environment limit, sensitivity, stability and the like, and a plurality of sensors with structures are developed and researched by combining the application in various fields. The existing sensor also has the problems of single detection of all parameters of the environment, insufficient sensitivity, narrow range of high-sensitivity detection intervals of the parameters of the environment, single environment application and multi-parameter cross sensitivity.
Disclosure of Invention
The invention provides a sensing device based on surface plasma resonance, which aims to solve the problems of single detection of various parameters of the environment, insufficient sensitivity, narrow detection interval range of the high sensitivity of the environment parameters, single environment application and multi-parameter cross sensitivity in the related technology.
The second object of the present invention is to provide a detection method based on surface plasmon resonance.
In an alternative scheme of the application, firstly, a sensing device based on surface plasmon resonance comprises a sensing system and a processor, wherein the sensing system comprises the following components sequentially arranged along the direction of an optical path: the device comprises a light source assembly, a wavelength division multiplexer, a sensor, a wavelength division demultiplexer and a spectrometer;
The light source component outputs linearly polarized light and pump light, the linearly polarized light and the pump 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 demultiplexer, and the spectrometer analyzes the spectrum; the sensor comprises an optical fiber, a first coating and a second coating; the optical fiber is coated with a first coating on the outer surface, a second coating is coated on the outer surface of the first coating, the sensor receives the modulated linearly polarized light and the pump light, the first coating is excited to generate surface plasma resonance, and the second coating is regulated by the pump light to change the characteristics.
In an alternative aspect of the present application, a light source assembly includes: the signal light source outputs an incident light signal, and the incident light signal 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 adjusts the 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 application, the 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.
In an alternative aspect of the application, the sensor further comprises a fiber grating coupling the linearly polarized light passing through the fiber core and the pump light to the cladding, exciting the first cladding to generate surface plasmon resonance.
In an alternative aspect of the present application, the second plating layer is a two-dimensional material including at least one of graphene, a two-dimensional transition metal sulfide, black scale, an MXene material, hexagonal boron nitride, graphite-phase carbon nitride, a layered metal oxide, and a layered double metal oxide.
In an alternative aspect of the present application, the first plating layer includes: at least one of a metal, a metal oxide, a multi-metal mixture, a metal-metal oxide mixture, a two-dimensional material.
In an alternative aspect of the 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 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 linearly polarized light and pump light;
Inputting linearly polarized light and pump light into a sensor through a wavelength division multiplexer;
the sensor is controlled to sense the external environment;
the output light of the sensor enters a spectrometer through a wavelength division demultiplexer;
The data is analyzed by a spectrometer and the sensor is adjusted according to the data.
In an embodiment of the present invention, outputting linearly polarized light and pump light includes: outputting incident light through a signal light source, and converting the incident light into linearly polarized light through a polarizer; the polarization controller adjusts the polarization direction of the linearly polarized light; outputting pump light through pump light source
In an alternative aspect of the application, analyzing the data by the spectrometer and adjusting the sensor based on the data includes: adjusting the second coating according to the pump light; the regulation and control of the pump light source on the output pump light is determined according to the analysis data of the spectrometer.
In the above technical solution, in the embodiment of the present invention, by providing a sensing device based on surface plasmon resonance, the second coating of the sensor in the sensing device is adjusted and controlled by adding pump light in the light source component, so that certain characteristics of the environment and the second coating on the sensor fiber are changed, the surface plasmon resonance environment excited by the first coating in the sensing probe is more close to the most sensitive measurement zone of the sensing probe, and the sensitivity of sensing to detection of various parameters of the environment is further improved. When the external environment condition is changed, the surface plasma resonance environment excited by the first coating in the sensing probe is more close to the most sensitive measurement zone of the sensing probe by adjusting the second coating and the pumping light source, so that the sensing detection zone range of the sensing probe is widened.
Through adjusting the design of sensing probe, if design the shape of different optic fibre, use different optic fibre types, carve into different kinds of gratings, use different first cladding layers, realize detecting the relevant parameter of environment in various different environments, simultaneously after sensing probe is produced, can also widen sensing probe measuring service environment through adjusting second cladding layer and pumping light source.
Through the regulation and control of the pumping light, certain characteristics of the environment and the second coating are changed, so that one sensor can measure a plurality of environment parameters simultaneously and the problem of multi-parameter cross sensitivity can be solved.
Drawings
The accompanying drawings are included to provide a further understanding of 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, without limitation, the embodiments of the invention. In the drawings:
FIG. 1 schematically illustrates a connection topology of a sensing system provided by an embodiment of the present invention;
FIG. 2 schematically shows a schematic structural view 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 present invention;
Fig. 4 schematically shows a schematic structural diagram of a sensor according to a second embodiment of the present invention;
FIG. 5 schematically illustrates a flow chart of a method of detection of a surface plasmon resonance based sensing system in accordance with an embodiment of the present invention;
FIG. 6 schematically shows a specific flowchart of step S100 in a method of detecting a surface plasmon resonance-based sensing system according to an embodiment of the present invention; and
Fig. 7 schematically shows a specific flowchart of step S500 in a detection method of a surface plasmon resonance based sensing system according to an embodiment of the present invention.
Description of the reference numerals
100. A sensing system;
10. a light source assembly; 30. a sensor; 40. a demultiplexer; 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 (3) a second plating layer.
Detailed Description
The following describes the detailed implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
It should be noted that, in the embodiment of the present application, directional indications (such as up, down, left, right, front, and rear … …) are referred to, and the directional indications are merely used to explain a relative positional relationship, a movement condition, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
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 a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.
A sensing system based on surface plasmon resonance is now proposed. The sensor aims to solve the problems that in the prior art, the sensor is single in detection of all parameters of the environment, not high enough in sensitivity, narrow in range of detection intervals of high sensitivity of the parameters of the environment, single in environment application and cross-sensitive of multiple parameters.
[ Embodiment one ]
Referring to fig. 1, fig. 1 schematically illustrates a connection topology of a sensing system according to an embodiment of the present invention, where 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 used for receiving the linearly polarized light and the pump light emitted by the light source assembly 10 and transmitting 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 pass through the wavelength division demultiplexer 40 and are received by the spectrometer 50;
a demultiplexer 40 connected to the sensor 30 and the spectrometer 50, for receiving the signal output from the sensor 30 and transmitting the signal to the spectrometer 50;
A spectrometer 50 for analysing the spectrum to adjust the sensor by spectrum.
Specifically, the light source assembly 10 can produce two different optical signals, that is, linearly polarized light and pump light, and under normal conditions, the optical signals with different wavelengths are combined into a beam to be incident on the wavelength division combiner 20 and transmitted along a single optical fiber; the wavelength division multiplexer 20 separates the optical signals (referred to as linearly polarized light and pump light) of the respective different wavelengths at the receiving end, and transmits the signals to the sensor 30. The signal transmitted by the sensor 30 is transmitted to the spectrometer 50 through the demultiplexer 40 at the rear end of the sensor 30, and then the spectrum is analyzed by the spectrometer 50.
It will be appreciated that in the direction of propagation of the light emitted by the light source module 10, the light is oscillating as a vector in only one fixed direction, such light being referred to as plane polarized light, since the locus of the light vector end points is a straight line, also called 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 does not rotate, and the pump light can be analogous to a laser. The above-described embodiments of the present invention provide a sensing system 100 for coupling the above devices using a light path, which is a common technical means understood by those skilled in the art, and is not described in more detail herein in the practice of the present invention.
Referring to fig. 2, fig. 2 schematically shows a schematic structure 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, and the sensor 30 receives the modulated linearly polarized light and the pump light, namely, the output quantity of 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, including: at least one of graphene, two-dimensional transition metal sulfide, black scale, MXene material, hexagonal boron nitride, graphite phase carbon nitride, layered metal oxide, layered bi-metal oxide.
It will be appreciated that the second plating layer 302 is a two-dimensional material, which is a material in which electrons can move freely (planar movement) only in two dimensions on the 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-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 one general inventive concept provided in this embodiment of the present invention, the second coating 303 of the sensor 30 in the sensing system 100 is adjusted by adding pump light in the light source assembly 10, so that certain characteristics of the environment and the second coating 303 on the optical fiber 301 of the sensor 30 are changed, and the surface plasmon resonance environment excited by the first coating 302 in the sensing probe is more close to the most sensitive measurement zone of the sensing probe, so as to further improve the sensing sensitivity to all parameters of the environment. When the external environment changes, the surface plasma resonance environment excited by the first coating 302 in the sensing probe is more close to the most sensitive measurement zone of the sensing probe by adjusting the second coating 303 and the pumping light source, so that the sensing detection zone range of the sensing probe is widened.
[ Example two ]
Referring to fig. 3 and 4, fig. 3 schematically illustrates a block diagram of a specific sensing system according to a second embodiment of the present invention; fig. 4 schematically shows a schematic structure of a sensor according to a second embodiment of the present invention. In a specific 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, which is converted into linearly polarized light by the polarizer 102; the pump light source 104 outputs pump light; wherein the wavelength division multiplexer 20 receives both the pump light and the linearly polarized light, the linearly polarized light adjusts the polarization direction via the polarization controller, wherein the second cladding 303 is adjusted by the pump light output from the pump light source 104.
It will be appreciated that the incident light is converted into linearly polarized light by the polarizer 102 (polarizer 102, polarizer Polarizer means that the signal light source emits natural light, and means for obtaining polarized light from the natural light), the polarization controller 103 may 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 to the sensor 30 through the wavelength division multiplexer 20, the output light of the sensor 30 passes through the wavelength division demultiplexer 40, and then is received by the spectrometer 50 and analysis of the spectrum is started.
In one embodiment, the sensing system 100 analyzes the data of the spectrometer 50 to analyze various environmental parameters in the surrounding environment, and adjusts the relevant structure of the sensor 30 by adjusting the pump light source 104, so as to further improve the sensitivity of sensing to each parameter of the environment, widen the sensing range of the sensor 30, widen the use environment measured by the sensor 30, and detect the effects of various environmental parameters.
In the detection of different detection environments and different parameters, the specific design can be performed according to actual needs, that is, in the detection of solid, liquid and gas, or in the detection of environmental components, the detection of the refractive index of the environment and the detection of the temperature of the environment, different sensors can be designed for detection under different conditions, but no matter what sensor 30 is used, the detection sensitivity of the sensor to each parameter of the environment can be further improved as long as the pump light output by the pump light source can be regulated, the range of the detection interval of the sensor 30 is widened, the use environment measured by the sensor 30 is widened, and the effect of various environmental parameters is detected.
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 quantity output by the wavelength division multiplexer 20 excites the first coating 302 to generate surface plasmon resonance, and the second coating 303 is regulated by the pump light output by the pump light source.
The second coating 303 is regulated and controlled by the pump light, so that the regulation and control of the sensor 30 can be realized, and the relevant performance of the sensor 30 can be regulated by only regulating the pump light output by the pump light source 104.
Further, the optical fiber 301 may be various, different optical fiber types may be used in different environments, materials and components of the optical fiber may be changed, different shapes may be designed, and the optical fiber may be designed specifically according to the actual situation.
In one embodiment, the optical fiber 301 may include 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, different parameters are detected, besides different types of optical fibers, gratings can be engraved in the optical fibers, different effects can be achieved by different gratings, refractive indexes of the gratings can be modulated, intervals and inclination angles of the gratings can be changed, and different purposes can be achieved by special designs of the gratings under different conditions.
As in one embodiment, the sensor 30 may further include a fiber grating (fine elements, not shown) that couples the modulated linearly polarized light of the core and the pump light to the cladding, exciting the first cladding to generate surface plasmon resonance. Specifically, the sensor is adaptively set according to the environment in which the sensor is located and the hardware configuration.
When the pump light regulates and controls the second plating layer 303, different second plating layers 303 can generate different effects and have different material parameters, the adopted materials are different in different fields, different second plating layers 303 can be adopted according to actual needs, and meanwhile, different second plating layers 303 can be adopted for combination.
In one embodiment, a different number of layers of the second plating 303 may be used, and different effects may be achieved.
In a particular embodiment, the second plating 303 includes at least one of graphene, a two-dimensional transition metal sulfide, black scale, an MXene material, hexagonal boron nitride, graphite-phase carbon nitride, a layered metal oxide, a layered double metal oxide.
In the sensor 30, a material capable of generating a surface plasmon resonance effect is required, and in different environments, different detection requirements are met, and according to practical situations, appropriate materials can be selected, material parameters are designed, and specific requirements are met.
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 and metal oxide mixture, a metal oxide mixture, and a second plating layer.
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; the second plating layer includes: at least one of graphene and tungsten disulfide.
It should be noted that, according to the experimental and practical analysis results, when the first plating layer 302 is metal, suitable materials for the second plating layer 303 include: at least one of graphene and tungsten disulfide.
It will be appreciated that the above materials and data are obtained by experimental analysis and require intelligent effort, so that simple combinations made by the above manufacturers of materials, or substitution of isotopes, as long as the same or equivalent effects are achieved, are within the scope of protection encompassed by the embodiments of the present invention.
Therefore, in the second embodiment of the present invention, the second coating 303 of the sensor 30 in the sensing system is adjusted by adding pump light in the light source assembly 10, so that the environment and some characteristics of the second coating 303 on the optical fiber 301 of the sensor 30 are changed, and the surface plasmon resonance environment excited by the first coating 302 in the sensing probe is more close to the most sensitive measurement zone of the sensing probe, so as to further improve the sensing sensitivity to all parameters of the environment. When the external environment changes, the second coating 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 coating 302 in the sensing probe is more close to the most sensitive measurement zone of the sensing probe, and the sensing detection zone range of the sensing probe is widened.
[ Example III ]
Referring to fig. 5, fig. 5 schematically illustrates a flowchart of a detection method of a sensing system based on surface plasmon resonance according to an embodiment of the present invention. As shown in fig. 5, in an embodiment of the present invention, a detection method of a sensing system based on surface plasmon resonance is provided, which mainly includes the following steps:
and step S100, outputting linearly polarized light and pump light.
Step S200, inputting linearly polarized light and pump light into a sensor through a wavelength division multiplexer;
Step S300, controlling a sensor to sense the external environment;
step S400, the output light of the sensor enters a spectrometer through a wavelength division demultiplexer;
and S500, analyzing data by a spectrometer and adjusting the sensor according to the data.
In one embodiment, through the steps, a specific value of a certain parameter in the environment can be obtained by analyzing the data on the spectrometer, so that the environment is sensed.
Referring to fig. 6, fig. 6 schematically shows a specific flowchart of step S100 in a detection method of a surface plasmon resonance-based sensing system according to an embodiment of the present invention;
the output linearly polarized light and the pump light include:
s101, outputting incident light through a signal light source, and converting the incident light into linearly polarized light through a polarizer;
step S102, a polarization controller adjusts the polarization direction of linearly polarized light;
Step S103, outputting pump light through a pump light source.
Referring to fig. 7, fig. 7 schematically shows a specific flowchart of step S500 in a detection method of a surface plasmon resonance-based sensing system according to an embodiment of the present invention; in consideration of the complexity of the environment, different environments influence the sensing effect of the sensing system, and the sensing sensitivity of sensing on each parameter of the environment can be further improved by adjusting and controlling the pumping light, so that the sensing range of the sensing probe is widened, and the use environment measured by the sensing probe is widened. In step S500, the data is analyzed by a spectrometer and the sensor is adjusted according to the data
Step S304 of analyzing data by the received output light of the sensor;
Step S305, determining pump light according to the analysis data;
step S306, the second plating layer is adjusted by the pump light.
In one embodiment, the sensitivity of sensing to detection of various parameters of the environment can be further improved through adjustment of the pump light, the range of a sensing detection interval of the sensing probe is widened, the use environment measured by the sensing probe is widened, and the sensor is suitable for wider use scenes.
In addition, the pump 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 from the spectrometer analysis data.
In summary, the control method provided by the embodiment of the invention can be utilized to rapidly judge the most brightness of the sensing device in real time. By utilizing the integrated idea, the deep learning is organically combined with the special scene, the real-time, rapid and accurate control of the light brightness can be achieved at the equipment end, the continuous loop iteration optimization can be realized, and a complete decision control flow is provided. Therefore, the network bandwidth can be saved, the pressure of the server is reduced, and better experience is brought to the user.
And the pumping light can be added in the light source assembly to regulate and control, so that certain characteristics of the environment and a 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 more close to the most sensitive measurement zone of the sensing probe, and the sensing sensitivity to all 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 more close to the most sensitive measurement zone of the sensing probe, and the sensing detection zone range of the sensing probe is widened.
It will also be appreciated by those skilled in the art that if the control method or processor provided by the present invention is simply changed, the functions added to the method are combined, or replaced on the device thereof, such as replacement of each component on model materials, replacement of use environments, simple replacement of each component positional relationship, etc.; or the products formed by the two are integrally arranged; or a removable design; the combined components may constitute a method/apparatus/device with specific functions, and it is within the scope of the present invention to replace the method and apparatus of the present invention with such a method/apparatus/device.
The fifth embodiment of the present invention also provides a sensing device, including a sensing system as described above. It should be understood that the sensing device is not limited in size or shape, and only needs to use the corresponding elements of the processor to achieve the same or similar functions, and all the sensing devices are also 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 element, and the processor executes the program element stored in the memory to realize corresponding functions.
The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The kernel may be provided with one or more of the light supplementing for the detection method for the sensing system by adjusting the kernel parameters.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
The embodiment of the 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, which is used for running a program, wherein the program runs to execute the detection method for the sensing system.
The embodiment of the invention also provides a computer program product, which comprises a computer program, wherein the computer program realizes the detection method for the sensing system when being executed by a processor.
It will be appreciated by those skilled in the art that 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 one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) or nonvolatile memory, such as Read Only Memory (ROM) or flash RAM. 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 storage media for a computer 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, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (9)
1. The sensing device based on surface plasmon resonance is characterized by comprising a sensing system and a processor, wherein the sensing system comprises the following components sequentially arranged along the light path direction: the device comprises a light source assembly, a wavelength division multiplexer, a sensor, a wavelength division demultiplexer and a spectrometer;
The light source component outputs linearly polarized light and pump light, the linearly polarized light and the pump 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 demultiplexer, and the spectrometer analyzes the spectrum; the sensing system analyzes various environmental parameters in the surrounding environment by analyzing the data of the spectrometer, regulates and controls the related structure of the sensor by regulating and controlling the pump light by the pump light source, widens the sensing detection interval range of the sensor, widens the use environment measured by the sensor and simultaneously detects various environmental parameters;
wherein the sensor comprises an optical fiber; the optical fiber is characterized in that 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, the sensor receives the modulated linearly polarized light and the pump light to excite the first coating to generate surface plasmon resonance, the second coating is regulated by the pump light to change the characteristics, the characteristics of the environment and the second coating on the optical fiber of the sensor are changed by adding the pump light in a light source assembly to regulate and control, the surface plasmon resonance environment excited by the first coating in the sensor is more close to the most sensitive measurement zone of the sensor, when the external environment condition is changed, the second coating and the pump light source are adaptively regulated according to the data analyzed by the spectrum, and the surface plasmon resonance environment excited by the first coating in the sensor is more close to the most sensitive measurement zone of the sensor;
The second coating is a two-dimensional material and comprises at least one of graphene, two-dimensional transition metal sulfide, black scale, MXene material, hexagonal boron nitride, graphite phase carbon nitride, lamellar metal oxide and lamellar bimetallic oxide;
The processor is used for running a program for controlling the sensing system, and the program comprises the step of controlling the light source assembly to output the linearly polarized light and the pump light.
2. The surface plasmon resonance-based sensing apparatus 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, and the incident light signal is converted into linearly polarized light through the polarizer; the pump light source outputs the pump light; the wavelength division multiplexer receives the pump light and the linearly polarized light at the same time, and the linearly polarized light adjusts the polarization direction through the polarization controller.
3. The surface plasmon resonance-based sensing device of claim 1 wherein the 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 apparatus of claim 1 wherein said sensor further comprises a fiber grating coupling said linearly polarized light passing through the fiber core with said pump light to the cladding layer, exciting said first cladding layer to generate surface plasmon resonance.
5. The surface plasmon resonance-based sensing device of claim 1 wherein the first plating layer comprises: at least one of a metal, a metal oxide, a multi-metal mixture, a metal-metal oxide mixture, a two-dimensional material.
6. The surface plasmon resonance-based sensing apparatus of claim 5 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 metal, the second plating layer includes: at least one of graphene and tungsten disulfide.
7. A detection method based on surface plasmon resonance, characterized in that it is applied to the sensing device based on surface plasmon resonance according to any one of claims 1 to 6, and comprises:
outputting the linearly polarized light and the pump light;
inputting the linearly polarized light and the pump 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 demultiplexer;
analyzing data by the spectrometer and adjusting the sensor according to the data.
8. The method of claim 7, wherein outputting the linearly polarized light and the pump light comprises:
Outputting incident light through a signal light source, wherein the incident light is converted into linearly polarized light through a polarizer;
The polarization controller adjusts the polarization direction of the linearly polarized light;
And outputting the pump light through the pump light source.
9. The method of claim 7, wherein analyzing data by the spectrometer and adjusting the sensor based on the data comprises:
analyzing data by the received output light of the sensor;
determining the pump light according to the analysis data;
and adjusting the second coating by the pump light.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110287874X | 2021-03-17 | ||
| CN202110287874 | 2021-03-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113533261A CN113533261A (en) | 2021-10-22 |
| CN113533261B true CN113533261B (en) | 2024-04-26 |
Family
ID=78090067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110881329.3A Active CN113533261B (en) | 2021-03-17 | 2021-08-02 | Sensing device and detection method based on surface plasmon resonance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113533261B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136483B (en) * | 2021-11-30 | 2023-12-22 | 哈尔滨理工大学 | MXene and GMM coated optical fiber composite structure double-parameter measuring sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133320A (en) * | 2019-05-23 | 2019-08-16 | 暨南大学 | Plasma resonance optical fiber hot wire anemometer, detection system and method |
| CN112014357A (en) * | 2020-08-03 | 2020-12-01 | 东南数字经济发展研究院 | Trace pesticide residue detection system based on surface plasma resonance technology |
| CN112485467A (en) * | 2020-11-10 | 2021-03-12 | 广东工业大学 | Temperature compensation accelerometer based on polarization maintaining optical fiber double-arm heteroaxial interferometer |
| CN217303979U (en) * | 2021-03-17 | 2022-08-26 | 广东工业大学 | Sensing system and detection device based on surface plasma resonance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101257309B1 (en) * | 2011-11-11 | 2013-04-23 | 한국과학기술연구원 | Fiber-optic surface plasmon resonance sensor and sensing method using the same |
-
2021
- 2021-08-02 CN CN202110881329.3A patent/CN113533261B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133320A (en) * | 2019-05-23 | 2019-08-16 | 暨南大学 | Plasma resonance optical fiber hot wire anemometer, detection system and method |
| CN112014357A (en) * | 2020-08-03 | 2020-12-01 | 东南数字经济发展研究院 | Trace pesticide residue detection system based on surface plasma resonance technology |
| CN112485467A (en) * | 2020-11-10 | 2021-03-12 | 广东工业大学 | Temperature compensation accelerometer based on polarization maintaining optical fiber double-arm heteroaxial interferometer |
| CN217303979U (en) * | 2021-03-17 | 2022-08-26 | 广东工业大学 | Sensing system and detection device based on surface plasma resonance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113533261A (en) | 2021-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Urrutia et al. | A comprehensive review of optical fiber refractometers: Toward a standard comparative criterion | |
| Zhao et al. | Simultaneous measurement of salinity, temperature and pressure in seawater using optical fiber SPR sensor | |
| Yu et al. | High sensitivity all optical fiber conductivity-temperature-depth (CTD) sensing based on an optical microfiber coupler (OMC) | |
| Qian et al. | Review of salinity measurement technology based on optical fiber sensor | |
| Jabin et al. | Titanium-coated dual-core D-shaped SPR-based PCF for hemoglobin sensing | |
| Alonso et al. | New ‘in-line’optical-fibre sensor based on surface plasmon excitation | |
| CA2072998C (en) | Optical immunoassay | |
| Zakaria et al. | Fabrication and simulation studies on D-shaped optical fiber sensor via surface plasmon resonance | |
| CN108680531B (en) | Titania film coating inclined optical fiber grating refractive index sensor and detection system | |
| CN107860750B (en) | Sensing device based on tilted fiber bragg grating surface plasma resonance and parameter optimization method thereof | |
| Špačková et al. | Novel concept of multi-channel fiber optic surface plasmon resonance sensor | |
| Xie et al. | In-line microfiber-assisted Mach–Zehnder interferometer for microfluidic highly sensitive measurement of salinity | |
| Ortega-Gomez et al. | Plasmonic sensors based on tilted Bragg gratings in multicore optical fibers | |
| US9068950B2 (en) | Vernier photonic sensor data-analysis | |
| Pham et al. | Demodulation method for tilted fiber Bragg grating refractometer with high sensitivity | |
| CN113533261B (en) | Sensing device and detection method based on surface plasmon resonance | |
| Xu et al. | Ultrasensitive broadband refractometer based on single stress-applying fiber at dispersion turning point | |
| Shen et al. | Microfluidic flow direction and rate vector sensor based on a partially gold-coated TFBG | |
| WO2013053930A1 (en) | Resonant biosensor | |
| CN217303979U (en) | Sensing system and detection device based on surface plasma resonance | |
| CN108872089B (en) | Inner cladding-containing modulation inclined fiber bragg grating refractive index sensing device and method | |
| Mahani et al. | Design of an efficient Fabry-Perot biosensor using high-contrast slanted grating couplers on a dual-core single-mode optical fiber tip | |
| Gupta | Surface plasmon resonance based fiber optic sensors | |
| Hochreiner et al. | Modeling the response of a long-period fiber grating to ambient refractive index change in chemical sensing applications | |
| KR100772557B1 (en) | Apparatus for measurement based on micro-optic mach-zehnder interferometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |