CN203083927U - Optical fiber refraction index sensor based on single mode, fine core, multi-mode and single mode structure - Google Patents
Optical fiber refraction index sensor based on single mode, fine core, multi-mode and single mode structure Download PDFInfo
- Publication number
- CN203083927U CN203083927U CN 201320049373 CN201320049373U CN203083927U CN 203083927 U CN203083927 U CN 203083927U CN 201320049373 CN201320049373 CN 201320049373 CN 201320049373 U CN201320049373 U CN 201320049373U CN 203083927 U CN203083927 U CN 203083927U
- Authority
- CN
- China
- Prior art keywords
- mode
- fiber
- single mode
- optical fiber
- core
- 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.)
- Expired - Fee Related
Links
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses an optical fiber refraction index sensor based on a single mode, fine core, multi-mode and single mode structure. The optical fiber refraction index sensor is characterized by comprising a light source (1), a single mode fiber (2), a fine core fiber (3), a multi-mode fiber (4) and a spectrograph (5), wherein the light source (1) is connected with the fine core fiber (3) through the single mode fiber (2); and the multi-mode fiber (4) is connected with the spectrograph (5) through the fine core fiber (3). According to the structure, the fine core fiber and a wrapped fiber are taken as sensing heads, and the fine core fiber wrapping mode is triggered by using a section of multi-mode fiber. Due to the evanescent field effect, the phase difference between the transmission modes of a fine core wrapping layer and a core layer is changed because of the change of the external environment, so that an interference spectrum peak value shifts, and the measurement on the external refraction index is realized; and by utilizing the device, the full optical fiber sensing is realized, the manufacturing method is simple, the cost is low, and the wide application of an optical fiber sensor in the sensing field is promoted.
Description
Technical field
The utility model provides the optical fibre refractivity sensor based on single mode-thin core-multi-mode-single mode structure, belongs to technical field of optical fiber sensing.
Background technology
Utilize the variation of external environment to cause that the instrument that refractive index is measured in drift takes place the interference spectum peak value based on single mode-thin core-multi-mode-single mode structured optical fiber index sensor.Be different from the other technologies of machinery and the method for electricity, Fibre Optical Sensor has many advantages, as electromagnetic compatibility, and anti-erosion, high sensitivity and long-range induction etc.Have in a large number about the research of this respect and formed multiple light refractive index sensing system, traditional optical fiber liquid refractive index sensor system, but very big cross-sensitivity and expensive ultraviolet laser, this can produce bigger optical loss.Just avoided this problem and adopt, reduced optical loss greatly at the optical fibre refractivity sensor of single mode-thin core-multi-mode-single mode structure.
Summary of the invention
The utility model purpose has been to provide a kind of index sensor based on single mode-thin core-multi-mode-single mode structure.This device can be converted into the variation of peripheral refraction rate the variation of light wave, is convenient to measure refractive index, has characteristics such as simple in structure, easy operating.
The utility model is achieved through the following technical solutions:
Optical fibre refractivity sensor based on single mode-thin core-multi-mode-single mode structure is characterized in that: be made up of light source (1), single-mode fiber (2), thin-core fibers (3), multimode optical fiber (4), spectrometer (5); Light source (1) connects thin-core fibers (3) by single-mode fiber (2), and multimode optical fiber (4) connects spectrometer (5) by multimode optical fiber (3).
Described optical fibre refractivity sensor based on single mode-thin core-multi-mode-single mode structure, it is characterized in that: the length of thin-core fibers (3) is 1～2cm; Core diameter is 3～4 μ m; Cladding diameter is 85～100 μ m.
Described optical fibre refractivity sensor based on single mode-thin core-multi-mode-single mode structure, it is characterized in that: multimode optical fiber (4) length is 1～2cm; Core diameter is 51～60 μ m; Cladding diameter is 125～130 μ m.
Principle of work of the present utility model is: light source laser instrument 1 sends light wave, enter in the covering and form two kinds to a part of light wave of thin-core fibers 3 couplings place by single-mode fiber 2 fibre cores and interfere light waves, arriving the interior a part of light wave of multimode optical fiber 4 back coverings enters in the fibre core, light wave in the fibre core covering is respective change along with change of refractive, and interference fringe changes along with variations in refractive index is carried out respective change.
The beneficial effects of the utility model are: described based on single mode-carefully the structure of the optical fibre refractivity sensor of core-multi-mode-single mode structure is a kind of new structure, the visibility of interference fringe is compared traditional measurement method and is improved greatly.
Description of drawings
Fig. 1 is based on the optical fibre refractivity sensing synoptic diagram of single mode-thin core-multi-mode-single mode structure;
Fig. 2 measures wave length shift figure under the different refractivity.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Referring to accompanying drawing 1, the optical fibre refractivity sensor based on single mode-thin core-multi-mode-single mode structure is characterized in that: be made up of light source (1), single-mode fiber (2), thin-core fibers (3), multimode optical fiber (4), spectrometer (5); Light source (1) connects thin-core fibers (3) by single-mode fiber (2), and thin-core fibers (3) connects spectrometer (5) by multimode optical fiber (4).
Fig. 2 is wave length shift figure corresponding under the different refractivity situation.Along with the increase of refractive index, there is good linear relationship in the centre wavelength of interference fringe to the drift of shortwave direction between drift value and the refractive index as can be seen, and the linearity reaches 0.99943.By this linear relationship, can realize the measurement of refractive index.
Claims (3)
1. based on the optical fibre refractivity sensor of single mode-thin core-multi-mode-single mode structure, it is characterized in that: form by light source (1), single-mode fiber (2), thin-core fibers (3), multimode optical fiber (4), spectrometer (5); Light source (1) connects thin-core fibers (3) by single-mode fiber (2), and multimode optical fiber (4) connects spectrometer (5) by multimode optical fiber (3).
2. the optical fibre refractivity sensor based on single mode-thin core-multi-mode-single mode structure according to claim 1, it is characterized in that: the length of thin-core fibers (3) is 1～2cm; Core diameter is 3～4 μ m; Cladding diameter is 85～100 μ m.
3. the optical fibre refractivity sensor based on single mode-thin core-multi-mode-single mode structure according to claim 1, it is characterized in that: multimode optical fiber (4) length is 1～2cm; Core diameter is 51～60 μ m; Cladding diameter is 125～130 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320049373 CN203083927U (en) | 2013-01-25 | 2013-01-25 | Optical fiber refraction index sensor based on single mode, fine core, multi-mode and single mode structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320049373 CN203083927U (en) | 2013-01-25 | 2013-01-25 | Optical fiber refraction index sensor based on single mode, fine core, multi-mode and single mode structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203083927U true CN203083927U (en) | 2013-07-24 |
Family
ID=48829752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320049373 Expired - Fee Related CN203083927U (en) | 2013-01-25 | 2013-01-25 | Optical fiber refraction index sensor based on single mode, fine core, multi-mode and single mode structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203083927U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052731A (en) * | 2016-08-16 | 2016-10-26 | 广州科技职业技术学院 | Novel fiber sensing head and sensor |
| CN106568466A (en) * | 2016-10-19 | 2017-04-19 | 暨南大学 | Fine core microstructure optical fiber interferometer sensor and temperature and strain detection method therefor |
| CN108663076A (en) * | 2018-05-14 | 2018-10-16 | 京东方科技集团股份有限公司 | Slant angle sensor and preparation method thereof |
| CN112432912A (en) * | 2020-11-19 | 2021-03-02 | 哈尔滨理工大学 | Optical fiber ultraviolet sensing device based on interference array and implementation method |
| CN112833928A (en) * | 2020-12-31 | 2021-05-25 | 桂林电子科技大学 | Cascade macrobend and alternative single mode-multimode fiber structure temperature refractive index sensor |
-
2013
- 2013-01-25 CN CN 201320049373 patent/CN203083927U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052731A (en) * | 2016-08-16 | 2016-10-26 | 广州科技职业技术学院 | Novel fiber sensing head and sensor |
| CN106568466A (en) * | 2016-10-19 | 2017-04-19 | 暨南大学 | Fine core microstructure optical fiber interferometer sensor and temperature and strain detection method therefor |
| CN108663076A (en) * | 2018-05-14 | 2018-10-16 | 京东方科技集团股份有限公司 | Slant angle sensor and preparation method thereof |
| CN108663076B (en) * | 2018-05-14 | 2020-08-04 | 京东方科技集团股份有限公司 | Inclination angle sensor and preparation method thereof |
| CN112432912A (en) * | 2020-11-19 | 2021-03-02 | 哈尔滨理工大学 | Optical fiber ultraviolet sensing device based on interference array and implementation method |
| CN112432912B (en) * | 2020-11-19 | 2021-09-24 | 哈尔滨理工大学 | Optical fiber ultraviolet sensing device based on interference array and implementation method |
| CN112833928A (en) * | 2020-12-31 | 2021-05-25 | 桂林电子科技大学 | Cascade macrobend and alternative single mode-multimode fiber structure temperature refractive index sensor |
| CN112833928B (en) * | 2020-12-31 | 2022-12-06 | 桂林电子科技大学 | Cascade macrobend and alternative single mode-multimode fiber structure temperature refractive index sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103969221A (en) | Optical fiber refractive index sensor based on single mode-fine core-multimode-single mode structure | |
| Iadicicco et al. | Refractive index sensor based on microstructured fiber Bragg grating | |
| CN203083927U (en) | Optical fiber refraction index sensor based on single mode, fine core, multi-mode and single mode structure | |
| CN100367016C (en) | Fibre-optical temperature measuring device and measurement thereof | |
| CN103940530B (en) | A kind of temperature sensor based on hollow annular waveguide fiber | |
| CN101614601B (en) | Internal fiber integration type miniature Michelson interferometric sensor and manufacturing method thereof | |
| CN203587177U (en) | Optical fiber liquid level sensor | |
| CN107515054B (en) | Optical fiber temperature and refractive index measurement sensing device based on Michelson interferometer | |
| CN104297208A (en) | Interferometric optical fiber sensor based on pohotonic crystal optical fiber | |
| CN102226725B (en) | Inner-wall waveguide long-time cycle fiber grating sensor | |
| CN103528609A (en) | Combined interference type multi-parameter optical fiber sensor | |
| CN108426533B (en) | Sensor for detecting diameter of micro-nano optical fiber and manufacturing method thereof | |
| CN203432906U (en) | Refractive index optical fiber sensing probe with tapering structure | |
| CN101650235A (en) | Minitype optical fiber internal integrated optical fiber interference type temperature sensor and manufacturing method thereof | |
| CN102261965A (en) | Temperature sensing method and device based on double-core optical fiber | |
| CN202041222U (en) | In-wall waveguide long-period fiber grating sensor | |
| Chen et al. | Novel compact and low-cost ultraweak Fabry–Perot interferometer as a highly sensitive refractive index sensor | |
| CN104406573A (en) | Coreless optical fiber-based tilt angle sensor capable of discriminating direction | |
| CN206862524U (en) | A kind of double measurement sensors based on twin-core fiber | |
| CN103852191A (en) | Optical fiber temperature sensor insensitive to refractive index | |
| CN103453940A (en) | Optical fiber sensor based on multi-mode structure | |
| CN102997848A (en) | Two-dimensional displacement sensor based on three-core single-mode fiber Bragg grating | |
| CN106052913B (en) | High-sensitivity pressure sensing device | |
| CN101109663A (en) | Optical fiber temperature sensor based on bending loss | |
| CN103115570B (en) | Based on the Mach-Zahnder interference micrometric displacement sensor of telescope-type pyrometric cone structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20140125 |