CN220251726U - Metal and metal oxide based composite reinforced Z-type optical fiber sensor - Google Patents
Metal and metal oxide based composite reinforced Z-type optical fiber sensor Download PDFInfo
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- CN220251726U CN220251726U CN202321497766.6U CN202321497766U CN220251726U CN 220251726 U CN220251726 U CN 220251726U CN 202321497766 U CN202321497766 U CN 202321497766U CN 220251726 U CN220251726 U CN 220251726U
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- metal
- optical fiber
- metal oxide
- composite reinforced
- fiber sensor
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 45
- 239000002184 metal Substances 0.000 title claims abstract description 37
- 229910044991 metal oxide Inorganic materials 0.000 title claims abstract description 35
- 150000004706 metal oxides Chemical class 0.000 title claims abstract description 35
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 239000000835 fiber Substances 0.000 claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 claims abstract description 35
- 238000004891 communication Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 238000005253 cladding Methods 0.000 claims description 16
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 150000002500 ions Chemical class 0.000 claims description 6
- 238000004544 sputter deposition Methods 0.000 claims description 6
- 238000007738 vacuum evaporation Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910000510 noble metal Inorganic materials 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 3
- 229910001887 tin oxide Inorganic materials 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 230000005672 electromagnetic field Effects 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000004048 modification Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The utility model discloses a metal and metal oxide based composite reinforced Z-shaped optical fiber sensor, which comprises a fiber core and common single-mode communication optical fibers positioned at two ends of the fiber core, wherein the fiber core and the common single-mode communication optical fibers jointly form a Z-shaped optical fiber structure, the outer side of the fiber core is a metal film layer, and the outer side of the metal film layer is a metal oxide film; and the outer side of the metal oxide film is used for adding and coating a material to be detected. The utility model has simple structure, is easy for mass production, carries out multi-material and multi-dimensional structural modification on the Z-shaped optical fiber interference surface, combines the SPPs resonance modes, has high local area and near field enhancement characteristics, improves the overall performance of the device by cooperative optimization on the basis of effectively balancing the SPPs mode characteristics, and provides a new dimension for the design of the high-sensitivity optical fiber sensor; the utility model adopts the all-optical principle, has no electric element, is not affected by interference and electromagnetic field, can be used in severe environment, and has the advantages of strong stability, high accuracy and long service life.
Description
Technical Field
The utility model relates to a photoelectric sensor, in particular to a Z-shaped optical fiber sensor based on metal and metal oxide composite enhancement.
Background
The SPR technology is essentially a physical optical phenomenon, and is favored by researchers in various countries because of the characteristics of light weight, electromagnetic interference resistance, accurate construction of biomolecular interaction sensing analysis and the like, but is mostly based on prism coupling, needs a high-precision rotating platform, and has the advantages of complex mechanical system design, low operation flexibility and unfavorable integration. While the optical fiber sensing technology with the sensing and transmission functions for external signals has high integration, the mode field of the optical fiber is weak, which is not beneficial to the interaction of substances.
Disclosure of Invention
The utility model aims to: the utility model aims to provide a Z-shaped optical fiber sensor based on metal and metal oxide composite enhancement, so that the sensitivity and portability of the optical fiber sensor are improved.
The technical scheme is as follows: the utility model relates to a metal and metal oxide based composite reinforced Z-shaped optical fiber sensor, which comprises a fiber core and common single-mode communication optical fibers positioned at two ends of the fiber core, wherein the fiber core and the common single-mode communication optical fibers jointly form a Z-shaped optical fiber structure, the outer side of the fiber core is a metal film layer, and the outer side of the metal film layer is a metal oxide film; and the outer side of the metal oxide film is used for adding and coating a material to be detected.
The fiber core is the fiber core of a common single mode fiber with the cladding removed, the length is 5-15 mm, and the inflection point angle formed by the fiber core and the common single mode communication fiber at the two ends of the fiber core is 5-15 DEG
The metal film layer adopts noble metals including gold, silver, copper and aluminum, the thickness of the metal film layer is 20-60 nanometers, and the film plating process adopts vacuum evaporation or ion sputtering.
The metal oxide film is made of semiconductor materials, and comprises tin oxide, zinc oxide and titanium dioxide, the thickness of the metal oxide film is 10-20 nanometers, and the coating process adopts vacuum evaporation or ion sputtering.
Working principle: when the fundamental mode of the fiber propagates in the fiber to the first Z-shaped inflection point, a portion of the fundamental mode will scatter, and according to the coupled mode theory, the scattered light wave will induce a cladding mode that excites the fiber, and then the fundamental mode and the cladding mode will propagate along the fiber independently of each other. The reflection spectrum of the cladding mode at the metal/metal oxide-fiber interface produces a wavelength loss, referred to as SPPs (Surface Plasmon Polaritons) resonance. Since SPPs are higher than those locally distributed on the surface of metal/metal oxide, the local refractive index environment of the surface has a great influence on the electromagnetic field characteristics of SPPs. Finally, when the fundamental and cladding modes propagate to the second Z-turn, they interfere and are again coupled into the fiber core. Therefore, the refractive index change of the external medium to be detected can be deduced by only monitoring the change of the resonance wavelength of the SPPs through the interference spectrum, so that the medium to be detected is identified.
The beneficial effects are that: compared with the prior art, the utility model has the following advantages:
1. the sensor provided by the utility model is based on only one common single-mode communication optical fiber, and a bending inflection point with a specific angle is introduced on the optical fiber by controlling the fusion parameters of the optical fiber, so that the sensing function is realized by utilizing the coupling regulation and control of the inflection point to the fundamental mode and the cladding mode, the structure is simple, and the mass production is easy.
2. The utility model carries out multi-material and multi-dimensional structural modification on the Z-type optical fiber interference surface, combines the resonance modes of SPPs, has high local area and near field enhancement characteristics, and the SPPs are very sensitive to the change of the surface local environment. On the basis of effectively balancing SPPs mode characteristics (including mode area and mode loss), the overall performance of the device is improved through collaborative optimization, and a new dimension is provided for the design of the high-sensitivity optical fiber sensor.
3. The utility model adopts the all-optical principle, has no electric element, is not affected by interference and electromagnetic field, can be used in severe environment, and has the advantages of strong stability, high accuracy and long service life.
4. The utility model can be directly attached to the measured object, is simple and quick to install, is convenient for large-area coverage, and can monitor the concentration change of the measured object in real time.
Drawings
FIG. 1 is a schematic diagram of the overall components of a Z-type fiber sensor according to the present utility model;
FIG. 2 is a schematic cross-sectional view of a Z-shaped middle portion of an optical fiber sensor according to the present utility model;
fig. 3 is a schematic cross-sectional view of a Z-shaped middle detecting portion of an optical fiber sensor according to the present utility model.
Detailed Description
The technical scheme of the utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the metal and metal oxide based composite reinforced Z-type optical fiber sensor comprises a fiber core 2 of a common single-mode optical fiber with a stripped cladding and common single-mode communication optical fibers 1 positioned at two ends of the fiber core, wherein the fiber core 2 and the common single-mode communication optical fibers 1 jointly form a Z-type optical fiber structure, the outer side of the fiber core 2 is provided with a metal film layer 3, and the outer side of the metal film layer 3 is provided with a metal oxide film 4; the outer side of the metal oxide film 4 is used for adding and coating materials to be detected. The core 2 of the ordinary single-mode fiber with the cladding removed is the core left by the ordinary single-mode communication fiber 1 with the cladding removed.
The metal film layer 3 is made of one of noble metals such as gold, silver, copper, aluminum and the like, the thickness is 20-60 nanometers, and the coating process adopts vacuum evaporation or ion sputtering.
The metal oxide film 4 is made of one of semiconductor materials such as tin oxide, zinc oxide, titanium dioxide and the like, the thickness is 10-20 nanometers, and the coating process adopts vacuum evaporation or ion sputtering.
The fiber core diameter of the common single-mode communication fiber 1 is 9 micrometers, the fiber core and cladding diameter is 125 micrometers, the fiber core refractive index is 1.45, and the cladding refractive index is 1.444.
The length of the fiber core 2 is 5-15 mm, and the inflection point angle formed by the fiber core 2 and the common single-mode communication optical fiber 1 positioned at the two ends of the fiber core is 5-15 degrees.
Working principle: when the fundamental mode of the fiber propagates in the fiber to the first Z-shaped inflection point, a portion of the fundamental mode will scatter, and according to the coupled mode theory, the scattered light wave will induce a cladding mode that excites the fiber, and then the fundamental mode and the cladding mode will propagate along the fiber independently of each other. The reflection spectrum of the cladding mode at the metal/metal oxide-fiber interface produces a wavelength loss, referred to as SPPs (Surface Plasmon Polaritons) resonance. Since SPPs are higher than those locally distributed on the surface of metal/metal oxide, the local refractive index environment of the surface has a great influence on the electromagnetic field characteristics of SPPs. Finally, when the fundamental and cladding modes propagate to the second Z-turn, they interfere and are again coupled into the fiber core. Therefore, the refractive index change of the external medium to be detected can be deduced by only monitoring the change of the resonance wavelength of the SPPs through the interference spectrum, so that the medium to be detected is identified.
Claims (10)
1. The metal and metal oxide composite reinforced Z-shaped optical fiber sensor is characterized by comprising a fiber core (2) and common single-mode communication optical fibers (1) positioned at two ends of the fiber core, wherein the fiber core (2) and the common single-mode communication optical fibers (1) jointly form a Z-shaped optical fiber structure, the outer side of the fiber core (2) is provided with a metal film layer (3), and the outer side of the metal film layer (3) is provided with a metal oxide film (4); the outer side of the metal oxide film (4) is used for adding a material to be detected.
2. A metal and metal oxide composite reinforced Z-type optical fiber sensor according to claim 1, characterized in that the core (2) is a core of a ordinary single-mode optical fiber with the cladding stripped.
3. A metal and metal oxide composite reinforced Z-type optical fiber sensor according to claim 1, characterized in that the metal film layer (3) is made of noble metal, including gold, silver, copper, aluminum.
4. A metal and metal oxide composite reinforced Z-type optical fiber sensor according to claim 1, characterized in that the metal oxide film (4) is made of semiconductor material, including tin oxide, zinc oxide, titanium dioxide.
5. The metal and metal oxide composite reinforced Z-type optical fiber sensor according to claim 1, wherein the thickness of the metal film layer (3) is 20-60 nm.
6. A metal and metal oxide composite reinforced Z-type optical fiber sensor according to claim 1, characterized in that the thickness of the metal oxide film (4) is 10-20 nm.
7. A metal and metal oxide composite reinforced Z-type optical fiber sensor according to claim 1, characterized in that the length of the core (2) is 5-15 mm.
8. The metal and metal oxide composite reinforced Z-type optical fiber sensor according to claim 1, wherein the inflection angle formed by the fiber core (2) and the common single-mode communication optical fiber (1) at both ends thereof is 5-15 degrees.
9. The metal and metal oxide composite reinforced Z-type optical fiber sensor according to claim 1, wherein the coating process of the metal film layer (3) adopts vacuum evaporation or ion sputtering.
10. The metal and metal oxide composite reinforced Z-type optical fiber sensor according to claim 1, wherein the coating process of the metal oxide film (4) adopts vacuum evaporation or ion sputtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321497766.6U CN220251726U (en) | 2023-06-13 | 2023-06-13 | Metal and metal oxide based composite reinforced Z-type optical fiber sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321497766.6U CN220251726U (en) | 2023-06-13 | 2023-06-13 | Metal and metal oxide based composite reinforced Z-type optical fiber sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220251726U true CN220251726U (en) | 2023-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321497766.6U Active CN220251726U (en) | 2023-06-13 | 2023-06-13 | Metal and metal oxide based composite reinforced Z-type optical fiber sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220251726U (en) |
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2023
- 2023-06-13 CN CN202321497766.6U patent/CN220251726U/en active Active
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