Sensing system and detection method based on surface plasma resonance

A surface plasmon and sensing system technology, applied in the field of ion resonance sensing systems, can solve the problems of narrow high-sensitivity detection range, multi-parameter cross-sensitivity, and insufficient sensitivity, and widen the sensing and detection range. , The effect of solving multi-parameter cross-sensitivity and improving detection sensitivity

Pending Publication Date: 2021-10-22
GUANGDONG UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0004] The first purpose of the present invention is to provide a method to solve the problems in the related art that the detection of environmental parameters is single, the sensitivity is not high enough, the detection range of high sensitivity of environmental parameters is narrow, the device is suitable for a single environment, and multi-parameters are cross-sensitive. Sensing system based on surface plasmon resonance

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  • Sensing system and detection method based on surface plasma resonance
  • Sensing system and detection method based on surface plasma resonance
  • Sensing system and detection method based on surface plasma resonance

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Embodiment 1

[0043] join figure 1 , figure 1 It schematically shows the connection topology diagram of the sensing system provided by the embodiment of the present invention. The sensing system 100 includes:

[0044] A light source assembly 10, configured to generate and output linearly polarized light and pump light;

[0045] The wavelength division multiplexer 20 is used to receive the linearly polarized light and the pumping light emitted by the light source assembly 10, and transmit the linearly polarized light and the pumping light to the sensor 30;

[0046] The sensor 30 receives and outputs linearly polarized light and pump light, and is received by the spectrometer 50 after passing through the demultiplexer 40;

[0047] The wavelength division multiplexer 40 is connected to the sensor 30 and the spectrometer 50, receives the signal output by the sensor 30, and sends it to the spectrometer 50;

[0048] The spectrometer 50 is used for analyzing the spectrum, so as to adjust the se...

Embodiment 2

[0058] see image 3 as well as Figure 4 , image 3 Schematically shows a block diagram of a specific sensing system provided according to Embodiment 2 of the present invention; Figure 4 A schematic structural view of the sensor according to Embodiment 2 of the present invention is schematically shown. 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, and the incident light signal passes through the polarizer 102 into Linearly polarized light; the pumping light source 104 outputs pumping light; wherein the wavelength division multiplexer 20 simultaneously receives the pumping light and the linearly polarized light, and the linearly polarized light adjusts the polarization direction through the polarization controller, wherein, and the second coating layer 303 is pumped The pump light output by t...

Embodiment 3

[0078] see Figure 5 , Figure 5 A flow chart of a detection method of a surface plasmon resonance-based sensing system according to an embodiment of the present invention is schematically shown. Such as Figure 5 As shown, in one embodiment of the present invention, a detection method based on a surface plasmon resonance sensing system is provided, which mainly includes the following steps:

[0079] Step S100, outputting linearly polarized light and pumping light.

[0080] Step S200, inputting linearly polarized light and pump light into the sensor through a wavelength division multiplexer;

[0081] Step S300, controlling the sensor to sense the external environment;

[0082] Step S400, the output light of the sensor enters the spectrometer through the demultiplexer;

[0083] Step S500, analyzing the data of the spectrometer and adjusting the sensor according to the data.

[0084] In one embodiment, through the above steps, the specific value of a certain parameter in t...

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Abstract

The invention provides a sensing system and a detection method based on surface plasma resonance. The sensing system comprises a light source assembly, a wavelength division multiplexer, a sensor, a wavelength division demultiplexer and a spectrograph which are sequentially arranged in the direction of a light path, the light source assembly 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, output light of the sensor passes through the wavelength division demultiplexer and then is received by the spectrograph, and the spectrograph analyzes a spectrum, wherein the sensor comprises an optical fiber; and the outer surface of the optical fiber is plated with a first plating layer, the outer surface of the first plating layer is coated with a second plating layer, and the sensor receives the modulated linearly polarized light and the pump light so as to excite the first plating layer to generate surface plasma resonance. Due to the design of the sensing probe and the regulation and control of the pump light, the detection sensitivity of sensing to each parameter of the environment is improved, the use environment of sensing probe measurement is widened, meanwhile, one sensor can measure a plurality of environment parameters at the same time, and the problem of cross sensitivity of multiple parameters can be solved.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a sensing system and detection method based on surface plasmon resonance. Background technique [0002] It was first proposed by Jorgenson et al. to design the optical fiber SPR sensor with the method of wavelength modulation. With the development of optical fiber technology, due to the advantages of optical fiber with small size, low loss and suitable for long-distance transmission, more and more sensors using optical fiber cores instead of prisms have been researched and applied in biology, medicine, food various aspects of safety and industry. Optical fibers are divided into multi-mode optical fibers and single-mode optical fibers, and optical fiber SPR sensors are divided into online transmission and terminal reflection structures. Remove the cladding of a section of the sensing area of ​​the optical fiber, and coat a certain thickness of metal film on the sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/552G01N21/01
CPCG01N21/553G01N21/01G01N2021/0112
Inventor 曾亮曾欣媛张简智温坤华
Owner GUANGDONG UNIV OF TECH
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