CN211826596U - SPR-based device for improving temperature measurement precision - Google Patents
SPR-based device for improving temperature measurement precision Download PDFInfo
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- CN211826596U CN211826596U CN201921730584.2U CN201921730584U CN211826596U CN 211826596 U CN211826596 U CN 211826596U CN 201921730584 U CN201921730584 U CN 201921730584U CN 211826596 U CN211826596 U CN 211826596U
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Abstract
The utility model provides an improve device of temperature measurement precision based on SPR, it is low and practical scheduling problem in order to improve current temperature measurement precision. The utility model comprises small holes filled with temperature-sensitive liquid toluene, a metal gold layer, graphene holes, small air holes, large air holes, a quartz substrate and a perfect matching layer; each air hole is regularly arranged on the quartz substrate by taking a small hole filled with temperature-sensitive liquid toluene as a center; a perfect matching layer is arranged outside the quartz substrate, and a metal gold layer is coated outside the small hole filled with the temperature-sensitive liquid toluene. The utility model is suitable for an optic fibre temperature sensing field.
Description
Technical Field
The invention belongs to the technical field of optical fiber sensing, and particularly relates to a device for improving temperature measurement precision based on SPR.
Background
Compared with the traditional optical device, the microstructure optical fiber has the advantages of high birefringence, ultrahigh nonlinearity, extremely low constraint loss, endless single-mode operation and the like. Among them, Photonic Crystal Fibers (PCF) are the most ideal microstructured fibers. In recent years, PCFs with high birefringence and non-linear characteristics have gained widespread interest in communication and supercontinuum applications. Due to the difficulties of complex manufacturing process, large dimensional precision and the like of PCF, mass production and processing cannot be realized, and the structure and the property of PCF can only be researched by simulation software. Surface Plasmon Resonance (SPR) -based is a physical optical phenomenon that is generated by an interface of a metal material and a dielectric. Because the change of the resonance wavelength is extremely sensitive, the change can be used for sensing, so that the sensing performance of SPR-PCF combination is better, and the research on the device for improving the temperature measurement accuracy based on the SPR-PCF has great competitiveness.
At present, in the research aspect related to SPR-PCF sensing, the design of a square structure is proposed, but the design has no practicability and low precision. Therefore, it is important to design a temperature measuring device based on SPR with high accuracy and practical use.
Disclosure of Invention
The utility model provides an improve device of temperature measurement precision based on SPR is in order to improve current low and the practicality scheduling problem of temperature measurement precision.
The utility model provides a device of improvement temperature measurement accuracy based on SPR which characterized in that: the temperature-sensitive liquid toluene filling device comprises small holes (2-1) filled with temperature-sensitive liquid toluene, a metal gold layer (2-2), graphene holes (2-3), small air holes (2-4), large air holes (2-5), a quartz substrate (2-6) and a perfect matching layer (2-7);
graphene holes (2-3) and small air holes (2-4) are regularly arranged on the quartz substrate (2-6) by taking a small hole (2-1) filled with temperature-sensitive liquid toluene as a center, the large air hole (2-5) is arranged, the graphene holes (2-3) and the small air holes (2-4) are arranged in a crossed manner, and the diameter of the graphene holes (2-3) is the same as that of the small air holes (2-4);
a perfect matching layer (2-7) is arranged outside the quartz substrate (2-6), and a metal gold layer (2-2) is coated outside the small hole (2-1) filled with temperature-sensitive liquid toluene;
the small holes (2-1) filled with the temperature-sensitive liquid toluene and the metal gold layer (2-2) form a sensing channel, and a plasma body model excited on the surface of the metal gold layer and a base model achieve phase matching in a specific wavelength range to trigger a series of resonance loss peaks in a spectrum; the graphene holes (2-3) are surrounded around the small holes (2-1) filled with the temperature-sensitive liquid toluene, so that the extra loss of light energy in the device is reduced.
And in the graphene holes (2-3), the small air holes (2-4) and the large air holes (2-5), the distance between adjacent air holes is 2.4-2.8 μm.
The diameter of the small hole (2-1) filled with temperature-sensitive liquid toluene is 2.5 mu m, the thickness of the metal gold layer (2-2) is 25nm-45nm, the diameters of the graphene hole (2-3) and the small air hole (2-4) are 1.2 mu m-1.5 mu m, the diameter of the large air hole (2-5) is 2.0 mu m-2.5 mu m, and the refractive index of the quartz substrate (2-6) is 1.41-1.45.
The utility model has the advantages that: the PCF is accessed into the temperature measuring system, and the photonic crystal fiber is adopted to realize temperature sensing, so that the effect of improving the temperature measuring precision is achieved.
Drawings
FIG. 1 is a schematic diagram of an SPR-based device application system for improving temperature measurement accuracy.
Fig. 2 is a structural view of an apparatus for improving temperature measurement accuracy by SPR.
Detailed Description
The following examples will further illustrate the present invention with reference to the accompanying drawings:
as shown in fig. 2, an apparatus for improving temperature measurement accuracy based on SPR is characterized in that: the temperature-sensitive liquid toluene filling device comprises small holes (2-1) filled with temperature-sensitive liquid toluene, a metal gold layer (2-2), graphene holes (2-3), small air holes (2-4), large air holes (2-5), a quartz substrate (2-6) and a perfect matching layer (2-7);
graphene holes (2-3) and small air holes (2-4) are regularly arranged on the quartz substrate (2-6) by taking a small hole (2-1) filled with temperature-sensitive liquid toluene as a center, the large air hole (2-5) is arranged, the graphene holes (2-3) and the small air holes (2-4) are arranged in a crossed manner, and the diameter of the graphene holes (2-3) is the same as that of the small air holes (2-4);
a perfect matching layer (2-7) is arranged outside the quartz substrate (2-6), and a metal gold layer (2-2) is coated outside the small hole (2-1) filled with temperature-sensitive liquid toluene;
the small holes (2-1) filled with the temperature-sensitive liquid toluene and the metal gold layer (2-2) form a sensing channel, and a plasma body model excited on the surface of the metal gold layer and a base model achieve phase matching in a specific wavelength range to trigger a series of resonance loss peaks in a spectrum; the graphene holes (2-3) are surrounded around the small holes (2-1) filled with the temperature-sensitive liquid toluene, so that the extra loss of light energy in the device is reduced.
Furthermore, the distance between adjacent air holes in the graphene holes (2-3), the small air holes (2-4) and the large air holes (2-5) is 2.4-2.8 μm.
Furthermore, the diameter of the small hole (2-1) filled with the temperature-sensitive liquid toluene is 2.5 mu m, the thickness of the metal gold layer (2-2) is 25nm-45nm, the diameters of the graphene hole (2-3) and the small air hole (2-4) are 1.2 mu m-1.5 mu m, the diameter of the large air hole (2-5) is 2.0 mu m-2.5 mu m, and the refractive index of the quartz substrate (2-6) is 1.41-1.45.
The working principle is as follows: as shown in fig. 1, the ASE light source (1) is connected to the PCF (2) into the spectrometer (3). As the refractive index of the toluene filled with the temperature-sensitive liquid changes along with the temperature, the SPR mode and the mode of the fundamental mode both change, and the high-sensitivity and real-time temperature detection can be realized by monitoring the resonance wavelength and the peak power of the spectrum.
Claims (3)
1. The utility model provides a device of improvement temperature measurement accuracy based on SPR which characterized in that: the temperature-sensitive liquid toluene filling device comprises small holes (2-1) filled with temperature-sensitive liquid toluene, a metal gold layer (2-2), graphene holes (2-3), small air holes (2-4), large air holes (2-5), a quartz substrate (2-6) and a perfect matching layer (2-7);
graphene holes (2-3) and small air holes (2-4) are regularly arranged on the quartz substrate (2-6) by taking a small hole (2-1) filled with temperature-sensitive liquid toluene as a center, the large air hole (2-5) is arranged, the graphene holes (2-3) and the small air holes (2-4) are arranged in a crossed manner, and the diameter of the graphene holes (2-3) is the same as that of the small air holes (2-4);
a perfect matching layer (2-7) is arranged outside the quartz substrate (2-6), and a metal gold layer (2-2) is coated outside the small hole (2-1) filled with temperature-sensitive liquid toluene;
the small holes (2-1) filled with the temperature-sensitive liquid toluene and the metal gold layer (2-2) form a sensing channel, and a plasma body model excited on the surface of the metal gold layer and a base model achieve phase matching in a specific wavelength range to trigger a series of resonance loss peaks in a spectrum; the graphene holes (2-3) are surrounded around the small holes (2-1) filled with the temperature-sensitive liquid toluene, so that the extra loss of light energy in the device is reduced.
2. The SPR based apparatus for improving temperature measurement accuracy of claim 1, wherein: and in the graphene holes (2-3), the small air holes (2-4) and the large air holes (2-5), the distance between adjacent air holes is 2.4-2.8 μm.
3. The SPR based apparatus for improving temperature measurement accuracy of claim 1, wherein: the diameter of the small hole (2-1) filled with temperature-sensitive liquid toluene is 2.5 mu m, the thickness of the metal gold layer (2-2) is 25nm-45nm, the diameters of the graphene hole (2-3) and the small air hole (2-4) are 1.2 mu m-1.5 mu m, the diameter of the large air hole (2-5) is 2.0 mu m-2.5 mu m, and the refractive index of the quartz substrate (2-6) is 1.41-1.45.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921730584.2U CN211826596U (en) | 2019-10-15 | 2019-10-15 | SPR-based device for improving temperature measurement precision |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432924A (en) * | 2020-11-19 | 2021-03-02 | 哈尔滨理工大学 | SPR (surface plasmon resonance) -based square-hole photonic crystal fiber refractive index sensing device and method |
| CN112665751A (en) * | 2019-10-15 | 2021-04-16 | 哈尔滨理工大学 | Method and device for improving birefringence and temperature measurement accuracy based on SPR |
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2019
- 2019-10-15 CN CN201921730584.2U patent/CN211826596U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665751A (en) * | 2019-10-15 | 2021-04-16 | 哈尔滨理工大学 | Method and device for improving birefringence and temperature measurement accuracy based on SPR |
| CN112432924A (en) * | 2020-11-19 | 2021-03-02 | 哈尔滨理工大学 | SPR (surface plasmon resonance) -based square-hole photonic crystal fiber refractive index sensing device and method |
| CN112432924B (en) * | 2020-11-19 | 2023-12-22 | 哈尔滨理工大学 | Square hole photonic crystal fiber refractive index sensing device based on SPR |
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Granted publication date: 20201030 Termination date: 20211015 |