WO2019080049A1 - 一种基于表面等离子体共振的温度传感器及其制备方法 - Google Patents
一种基于表面等离子体共振的温度传感器及其制备方法Info
- Publication number
- WO2019080049A1 WO2019080049A1 PCT/CN2017/107819 CN2017107819W WO2019080049A1 WO 2019080049 A1 WO2019080049 A1 WO 2019080049A1 CN 2017107819 W CN2017107819 W CN 2017107819W WO 2019080049 A1 WO2019080049 A1 WO 2019080049A1
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- WIPO (PCT)
- Prior art keywords
- temperature sensor
- polishing
- gold film
- optical fiber
- sensing device
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
Definitions
- the invention belongs to the technical field of sensors, and in particular relates to a temperature sensor based on surface plasmon resonance and a preparation method thereof.
- the existing Surface Plasmon Resonance (SPR) based temperature sensor requires a liquid material tube package to the surface of the temperature sensor to detect the ambient temperature by the thermo-optic effect of the liquid material, but since the liquid material has The fluidity is therefore difficult to package, resulting in a complicated preparation process, and because of its obvious thermal expansion effect and unstable structure, it is prone to explosion when the temperature is too high, which limits its application in biochemistry and other fields.
- SPR Surface Plasmon Resonance
- the existing SPR-based temperature sensor has the fluidity of the liquid material, so the packaging is difficult, resulting in a complicated preparation process, and the thermal expansion effect is obvious, the structure is unstable, and the explosion is prone to occur when the temperature is too high. Its technical problems in the application of biochemistry and other fields.
- the main object of the present invention is to provide a temperature sensor based on surface plasmon resonance, which aims to solve the existing SPR-based temperature sensor. Due to the fluidity of the liquid material, the packaging is difficult, resulting in a complicated preparation process. Its thermal expansion effect is obvious, its structure is unstable, and it is prone to explosion when the temperature is too high, which limits its technical problems in the application of biochemistry and other fields.
- a first aspect of the present invention provides a surface plasmon resonance based temperature sensor, the temperature sensor comprising: a light source emitter, a sensing device, and a spectrometer;
- An output end of the light source emitter is connected to an input end of the sensing device, and an output end of the sensing device is connected to an input end of the spectrometer;
- the sensing device comprises a side polished single mode fiber, a gold film and a temperature sensitive film;
- the gold film is deposited on the polishing surface of the side polished single mode fiber, and the temperature sensitive film is cured on the gold film.
- the material of the temperature sensitive film is a UV-curable adhesive.
- the ultraviolet gel has a refractive index of 1.36.
- the gold film has a thickness of 45 nm to 60 nm.
- polishing surface of the side-polishing single-mode fiber is 2 ⁇ m - 3 ⁇ m from the upper surface of the core of the side-polishing single-mode fiber.
- a second aspect of the present invention provides a method of fabricating a temperature sensor based on surface plasmon resonance, characterized in that the method is for preparing a temperature sensor according to the first aspect of the invention, the method include:
- the light source emitter emits a light source to the single-mode fiber to obtain a transmission spectrum
- the spectrometer performs a real-time monitoring on the transmission spectrum
- the single-mode fiber is polished by using a side polishing method to obtain a side-grinding single-mode fiber
- the UV curable adhesive was evenly applied to the gold film and cured using an ultraviolet lamp.
- the side-polishing method is used to perform a polishing process on the single-mode optical fiber to obtain a side-grinding single-mode optical fiber, including:
- the upper surface of the single mode fiber is subjected to rough grinding treatment using 2000 mesh sandpaper;
- the upper surface of the rough grinding treatment is finely ground using 5000 mesh sandpaper;
- the finely polished upper surface was subjected to a fine polishing treatment using 12,000 grit sandpaper to obtain the polishing surface.
- the upper surface after the rough grinding treatment is 73 ⁇ m from the lower surface of the single-mode optical fiber, and the upper surface after the fine grinding treatment is 70 ⁇ m from the lower surface of the single-mode optical fiber.
- the invention provides a temperature sensor based on surface plasmon resonance, the temperature sensor comprises: a light source emitter, a sensing device and a spectrometer, wherein an output end of the light source emitter is connected to an input end of the sensing device, and the output of the sensing device The end is connected to the input end of the spectrometer, and the sensing device comprises a side polished single mode fiber, a gold film and a temperature sensitive film. The gold film is deposited on the polishing surface of the side polished single mode fiber, and the temperature sensitive film is cured on the gold film. .
- the temperature sensitive film is solid, it does not have the same fluidity as the liquid material, reduces the process of liquid encapsulation, simplifies the preparation process, and is warmed by temperature.
- the sensitive film is solid and the thermal expansion effect is not obvious, which improves the stability of the device structure and no longer limits its application in biochemistry and other fields.
- FIG. 1 is a schematic structural view of a temperature sensor based on surface plasmon resonance according to a first embodiment of the present invention
- FIG. 2 is a schematic diagram showing a refinement structure of a temperature sensor based on surface plasmon resonance according to a first embodiment of the present invention
- FIG. 3 is a schematic flow chart of a method for preparing a temperature sensor based on surface plasmon resonance according to a second embodiment of the present invention.
- FIG. 1 A schematic diagram of a detailed structure of a surface plasmon resonance temperature sensor, the temperature sensor comprising: a light source emitter 10, a sensing device 20, and a spectrometer 30;
- An output end of the light source emitter 10 is connected to an input end of the sensing device 20, and an output end of the sensing device 20 is connected to an input end of the spectrometer 30;
- the sensing device 20 includes a side polished single mode fiber 201, a gold film 202 and a temperature sensitive film 203;
- the gold film 202 is deposited on the polishing surface of the side polished single mode fiber 201, and the temperature sensitive film 203 is cured on the gold film 202.
- the side-grinding single-mode optical fiber 201 is composed of a core 204 and a cladding 205.
- the material of the temperature sensitive film 203 is a UV-curable glue.
- the ultraviolet gel has a refractive index of 1.36.
- a surface plasmon resonance based temperature sensor based on a common single mode fiber has a linear response to the refractive index, and its response to the refractive index is exponentially changed.
- the external refractive index increases and increases, but the higher the refractive index of the outside, the more the loss peak becomes wider, that is, the quality factor decreases.
- the reason why the UV-curable adhesive with a refractive index of 1.36 is selected is because it cures.
- the refractive index after the refractive index is about 1.39. In this refractive index range, not only a high sensitivity characteristic of the temperature sensor but also a high quality factor is ensured.
- the gold film 202 has a thickness of 45 nm to 60 nm.
- the thickness of the gold film 202 when the thickness of the gold film 202 is less than 45 nm, the stability of the temperature sensor is poor, and the quality factor is low.
- the thickness of the gold film 202 is higher than 60 nm, the energy of the light wave energy reaching the upper surface of the metal is lower. It also affects the temperature sensor's detection of the external refractive index.
- polishing surface of the side-polishing single-mode optical fiber 201 is 2 ⁇ m - 3 ⁇ m from the upper surface of the core of the side-polishing single-mode optical fiber 201.
- the light energy penetration depth of the single mode fiber core is 2 ⁇ m - 3 ⁇ m, so as to ensure that the light energy reaches the gold surface without affecting the light energy in the core.
- the upper surface of the core of the side-polishing single-mode optical fiber 201 is 2 ⁇ m - 3 ⁇ m.
- a surface plasmon resonance based temperature sensor is provided.
- the temperature sensor includes a light source emitter 10, a sensing device 20, and a spectrometer 30.
- the output end of the light source emitter 10 and the sensing device 20 The input ends are connected, the output end of the sensing device 20 is connected to the input end of the spectrometer 30, and the sensing device 20 comprises a side-grinding single-mode optical fiber 201, a gold film 202 and a temperature-sensitive film 203, and the gold film 202 is deposited on the side.
- the temperature sensitive film 203 is cured on the gold film 202.
- the temperature sensitive film 203 Compared with the prior art, by curing the temperature sensitive film 203 on the gold film 202, since the temperature sensitive film 203 is solid, it does not have fluidity like a liquid material, which reduces the process of liquid packaging in the prior art. The preparation process is simplified, and since the temperature sensitive film 203 is solid, the thermal expansion effect is not obvious, the stability of the device structure is improved, and the application in the biochemical field is no longer limited.
- FIG. 3 is a schematic flowchart diagram of a method for preparing a temperature sensor based on surface plasmon resonance according to a second embodiment of the present invention, including:
- Step 301 After the light source emitter emits a light source to the single-mode optical fiber to obtain a transmission spectrum, and the spectrometer performs real-time monitoring on the transmission spectrum, the single-mode optical fiber is polished by using a side polishing method to obtain a side polishing single.
- the single-mode optical fiber is fixed on the fixture of the polishing machine, and the two ends of the single-mode optical fiber are respectively connected with the light source emitter 10 and the spectrometer 30, and the light source emitter is transmitted to the single-mode optical fiber emitting light source.
- the upper surface of the single-mode fiber was coarsely ground using 2000 mesh sandpaper, so that the upper surface after rough grinding was 73 ⁇ m away from the lower surface of the single-mode fiber, and then 5000 mesh was used.
- the upper surface of the rough grinding treatment is finely ground by the sandpaper, so that the upper surface after the fine grinding treatment is 70 ⁇ m away from the lower surface of the single-mode optical fiber, and the finely polished upper surface is subjected to fine polishing treatment using 12000 mesh sandpaper.
- the surface crack of the fiber polishing surface can be reduced and the smoothness can be increased.
- the transmission spectrum of the optical fiber is monitored in real time by using a broadband light source and a spectrometer, and a charge-coupled device (CCD) imaging system is used to monitor the single-mode optical fiber after each polishing process.
- CCD charge-coupled device
- Step 302 uniformly depositing a gold film 202 on the polishing surface of the side polished single mode fiber 201;
- the transmission spectrum at this time is recorded as a reference spectrum.
- Step 303 uniformly applying the ultraviolet curable adhesive to the gold film 202, and curing using an ultraviolet lamp.
- the ultraviolet curable adhesive is evenly applied onto the gold film 202, and after curing with an ultraviolet lamp, the current transmission spectrum is recorded by a spectrometer and compared with the reference spectrum, so that the temperature change can be determined.
- the side mode polishing method is used to perform a polishing process on the single mode fiber to obtain a side throw.
- the single-mode optical fiber 201 is ground, and the gold film 202 is uniformly deposited on the polishing surface of the side-polished single-mode optical fiber 201, and the ultraviolet-curable adhesive is uniformly applied to the gold film 202 and cured by using an ultraviolet lamp, compared with the prior art.
- the temperature sensitive film 203 By curing the temperature sensitive film 203 on the gold film 202, since the temperature sensitive film 203 is solid, it does not have fluidity like a liquid material, which reduces the process of liquid encapsulation in the prior art, simplifies the preparation process, and Since the temperature sensitive film 203 is solid, the thermal expansion effect is not obvious, and the stability of the device structure is improved, and its application in biochemistry and the like is no longer limited.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
Claims (8)
- 一种基于表面等离子体共振的温度传感器,其特征在于,所述温度传感器包括:光源发射器、传感装置及光谱仪;
所述光源发射器的输出端与所述传感装置的输入端相连,所述传感装置的输出端与所述光谱仪的输入端相连;
所述传感装置包括侧面抛磨单模光纤、金膜及温敏薄膜;
所述金膜沉积在所述侧面抛磨单模光纤的抛磨面上,所述温敏薄膜固化在所述金膜上。 - 根据权利要求1所述的温度传感器,其特征在于,所述温敏薄膜的材料为紫外化固胶。
- 根据权利要求2所述的温度传感器,其特征在于,所述紫外化固胶的折射率为1.36。
- 根据权利要求1所述的温度传感器,其特征在于,所述金膜的厚度为45nm-60nm。
- 根据权利要求1所述的温度传感器,其特征在于,所述侧面抛磨单模光纤的抛磨面距离所述侧面抛磨单模光纤的纤芯的上表面2μm-3μm。
- 一种基于表面等离子体共振的温度传感器的制备方法,其特征在于,所述方法用于制备如权利要求1至5任意一项所述的温度传感器,所述方法包括:
在光源发射器向单模光纤发射光源得到传输光谱,光谱仪对所述传输光谱进行实时监测的条件下,使用侧面抛磨方式,对单模光纤进行抛磨处理,得到侧面抛磨单模光纤;
在所述侧面抛磨单模光纤的抛磨面上均匀沉积金膜;
将紫外固化胶均匀涂抹到所述金膜上,并使用紫外灯进行固化。 - 根据权利要求6所述的温度传感器,其特征在于,所述使用侧面抛磨方式,对单模光纤进行抛磨处理,得到侧面抛磨单模光纤,包括:
使用2000目砂纸对所述单模光纤的上表面进行粗磨处理;
使用5000目砂纸对粗磨处理后的上表面进行细磨处理;
使用12000目砂纸对细磨处理后的上表面进行精抛处理,得到所述抛磨面。 - 根据权利要求7所述的温度传感器,其特征在于,所述粗磨处理后的上表面距离所述单模光纤的下表面73μm,所述细磨处理后的上表面距离所述单模光纤的下表面70μm。
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