CN205748420U - A kind of cascade biconical optical fiber sensor - Google Patents
A kind of cascade biconical optical fiber sensor Download PDFInfo
- Publication number
- CN205748420U CN205748420U CN201620465346.3U CN201620465346U CN205748420U CN 205748420 U CN205748420 U CN 205748420U CN 201620465346 U CN201620465346 U CN 201620465346U CN 205748420 U CN205748420 U CN 205748420U
- Authority
- CN
- China
- Prior art keywords
- cone
- cascade
- optical fiber
- utility
- cone district
- 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
- Optical Transform (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
This utility model embodiment discloses a kind of cascade biconical optical fiber sensor, include input single-mode fiber, the first cone district, middle thick cone, the second cone district and outfan single-mode fiber successively, described first cone district, the second cone district symmetry, described first cone district is high-order mode lasing region.This utility model cascade biconical optical fiber sensor is capable of the highest refractive index and stress sensitivity.This utility model Fibre Optical Sensor uses the standard single-mode fiber of low cost, and preparation is simple and can obtain the highest refractive index sensitivity and strain sensitivity, can be widely applied to the sensory fields such as the civil area such as national defence, commercial production and biochemistry.
Description
Technical field
This utility model relates to sensory field of optic fibre, particularly relates to a kind of high sensitivity based on standard single-mode fiber cascade biconical optical fiber sensor.
Background technology
Fibre Optical Sensor be a kind of have that volume is little, lightweight, shape variable, fast response time, measuring amplitude width little on measured medium impact, fire prevention, the novel sensor of the advantage such as anticorrosive, electromagnetism interference, the measurement under various mal-condition can be met.
Refractive index and stress are extremely important in commercial measurement, the change of strength of fluid causes the change of refractive index, and then cause the change of high-order cladding mode effective refractive index, and the change of ambient refractive index does not interferes with the effective refractive index of core mode, core mode is different with the transfer rate of high-order cladding mode, cause exporting light and produce phase contrast, thus form interference spectrum, can be realized as the detection to strength of fluid change by measuring the amount of movement of interference spectrum.The change of stress also can cause core mode and the change of cladding mode effective refractive index, thus causes the movement of spectrum, can also be detected the change of stress by the change of measure spectrum.
Summary of the invention
This utility model embodiment technical problem to be solved is, it is provided that a kind of cascade biconical optical fiber sensor.The sensitivity of Fibre Optical Sensor can be improved.
In order to solve above-mentioned technical problem, this utility model embodiment provides a kind of cascade biconical optical fiber sensor, include input single-mode fiber, the first cone district, middle thick cone, the second cone district and outfan single-mode fiber successively, described first cone district, the second cone district symmetry, described first cone district is high-order mode lasing region.
Wherein, the described a length of 7-11mm of cascade biconical optical fiber sensor.
Wherein, a length of 3-5 mm is slightly bored in described centre.
Wherein, a diameter of 40-70 μm is slightly bored in described centre.
Wherein, described first cone district, second cone district a diameter of 15-35 μm.
Implement this utility model embodiment, have the advantages that this utility model cascade biconical optical fiber sensor is capable of the highest refractive index and stress sensitivity.This utility model Fibre Optical Sensor uses the standard single-mode fiber of low cost, and preparation is simple and can obtain the highest refractive index sensitivity and strain sensitivity, can be widely applied to the sensory fields such as the civil area such as national defence, commercial production and biochemistry.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model；
Fig. 2 is application structure schematic diagram of the present utility model.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, this utility model is described in further detail.
With reference to the overall structure schematic diagram of the present utility model shown in Fig. 1.
A kind of cascade biconical optical fiber sensor of this utility model embodiment, include that input single-mode fiber 1, first bores district 2, middle thick cone the 3, second cone district 4 and outfan single-mode fiber 5 successively, in test process, input single-mode fiber 1 is connected with wideband light source, outfan single-mode fiber 5 is connected with spectrogrph, as shown in Figure 2.
First cone district 2 is high-order mode lasing region; in standard single-mode fiber, the basic mode of transmission excites as high-order cladding mode in this part; another part is still fibre core basic mode; high-order cladding mode and fibre core basic mode are by middle thick cone 3; owing to having different effective refractive indexs, produce different Phase delay, can be coupled back in fibre core interfering with fibre core basic mode to high-order cladding mode during the second cone district 4; in transmitted spectrum, occur that trough, whole cascade double cone structure are all sensitive zones.
When cascade bipyramid length is long and too short, the interference effect produced is the most inconspicuous, when a length of 7-11mm of whole cascade bipyramid, effect is preferable, wherein, the a length of 3-5mm of middle thick cone, the diameter in the first cone district 2 and the second cone district 4 between 15 μm to 35 μm, the diameter of middle thick cone 3 between 40-70 μm, middle thick cone diameter excessive or meticulous time sensitivity can reduce.
Being preferably the first cone district 2 and a diameter of 21 μm of cone waist in the second cone district 4, middle thick cone diameter 61 μm, thick cone length 3mm, a length of 7mm of whole sensitive zones, its refractive index sensitivity reaches 1100nm/RIU.
Optic path when the present embodiment refractive index and strain sense is, the first cone district 2 is entered by input 1 from the light of wideband light source output, the portion of energy of fibre core is coupled into covering, light in covering transmits with the pattern of higher order, when optical transport to second cone district 4, in covering, portion of energy is coupled into again in fibre core, and in covering, remaining energy is transmitted in overlay after transmission a small distance and finally scattering is fallen.The effective refractive index transmitted in fibre core with covering due to light is different, so after light transmits equal length in fibre core and covering, can produce an optical path difference.
The bipyramid cascaded optical fiber sensor that the utility model proposes, has an advantage in that:
(1) this utility model uses standard single-mode fiber to be sensitive zones, does not has other kind of type optical fiber in whole light path, will not produce the interference caused because of model field unbalance during welding；
(2) sensitivity of this utility model refractive index is the highest, and its refractive index sensitivity reaches 1100nm/RIU；
(3) this utility model strain sensitive, stress sensitivity reaches-25pm/ μ ε, and its measurement scope can be more than 3000 μ ε；
(4) this utility model volume is little, simple in construction, is very easy to, can draw cone one-shot forming by scanning making when.
Certainly above-described embodiment is only for illustrating technology of the present utility model design and feature, its object is to allow person skilled in the art will appreciate that content of the present utility model and to implement according to this, can not limit protection domain of the present utility model with this.All modifications done according to the spirit of this utility model main technical schemes, all should contain within protection domain of the present utility model.
Claims (5)
1. a cascade biconical optical fiber sensor, it is characterized in that, including input single-mode fiber, the first cone district, middle slightly cone, the second cone district and outfan single-mode fiber successively, described first cone district, the second cone district symmetry, described first cone district is high-order mode lasing region.
Cascade biconical optical fiber sensor the most according to claim 1, it is characterised in that the described a length of 7-11mm of cascade biconical optical fiber sensor.
Cascade biconical optical fiber sensor the most according to claim 2, it is characterised in that a length of 3-5 mm is slightly bored in described centre.
Cascade biconical optical fiber sensor the most according to claim 3, it is characterised in that a diameter of 40-70 μm is slightly bored in described centre.
Cascade biconical optical fiber sensor the most according to claim 4, it is characterised in that described first cone district, second cone district a diameter of 15-35 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620465346.3U CN205748420U (en) | 2016-05-20 | 2016-05-20 | A kind of cascade biconical optical fiber sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620465346.3U CN205748420U (en) | 2016-05-20 | 2016-05-20 | A kind of cascade biconical optical fiber sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205748420U true CN205748420U (en) | 2016-11-30 |
Family
ID=57361593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620465346.3U Expired - Fee Related CN205748420U (en) | 2016-05-20 | 2016-05-20 | A kind of cascade biconical optical fiber sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205748420U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593119A (en) * | 2018-04-11 | 2018-09-28 | 南京大学 | A kind of continuously distributed structured optical fiber biochemical sensor and signal processing method of declining |
| CN109238506A (en) * | 2018-10-30 | 2019-01-18 | 南通大学 | A kind of high-sensitivity temperature sensor and system for detecting temperature |
| CN109632709A (en) * | 2018-12-27 | 2019-04-16 | 北京信息科技大学 | Cow's milk protein concentration detection method based on bipyramid MZI interference structure |
| CN112254838A (en) * | 2020-10-10 | 2021-01-22 | 南京邮电大学 | High-sensitivity temperature sensor based on cascade conical two-mode optical fiber structure and testing device |
| CN114088623A (en) * | 2021-11-04 | 2022-02-25 | 深圳技术大学 | Novel optical fiber sensor |
| CN114791294A (en) * | 2022-04-29 | 2022-07-26 | 南京信息工程大学 | Optical fiber sensor and method based on Mach-Zehnder interference |
-
2016
- 2016-05-20 CN CN201620465346.3U patent/CN205748420U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593119A (en) * | 2018-04-11 | 2018-09-28 | 南京大学 | A kind of continuously distributed structured optical fiber biochemical sensor and signal processing method of declining |
| CN108593119B (en) * | 2018-04-11 | 2020-10-30 | 南京大学 | Continuous distributed microstructure optical fiber biochemical sensor and signal processing method |
| CN109238506A (en) * | 2018-10-30 | 2019-01-18 | 南通大学 | A kind of high-sensitivity temperature sensor and system for detecting temperature |
| CN109238506B (en) * | 2018-10-30 | 2023-09-29 | 南通大学 | High-sensitivity temperature sensor and temperature detection system |
| CN109632709A (en) * | 2018-12-27 | 2019-04-16 | 北京信息科技大学 | Cow's milk protein concentration detection method based on bipyramid MZI interference structure |
| CN112254838A (en) * | 2020-10-10 | 2021-01-22 | 南京邮电大学 | High-sensitivity temperature sensor based on cascade conical two-mode optical fiber structure and testing device |
| CN112254838B (en) * | 2020-10-10 | 2023-01-20 | 南京邮电大学 | High-sensitivity temperature sensor based on cascade conical two-mode optical fiber structure and testing device |
| CN114088623A (en) * | 2021-11-04 | 2022-02-25 | 深圳技术大学 | Novel optical fiber sensor |
| CN114791294A (en) * | 2022-04-29 | 2022-07-26 | 南京信息工程大学 | Optical fiber sensor and method based on Mach-Zehnder interference |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205748420U (en) | A kind of cascade biconical optical fiber sensor | |
| CN203287311U (en) | Double-cone fine-core single mode fiber based transmission-type optical fiber humidity sensor | |
| CN205691170U (en) | A kind of air pressure and the Fibre Optical Sensor of temperature simultaneously measuring | |
| CN207335782U (en) | A kind of high stability all -fiber magnetic field and temperature two parameter measurement sensing head | |
| CN106052727B (en) | Sensor device based on optical fiber miniature Fabry-Perot cavity | |
| CN105974515A (en) | Photonic crystal fiber and surface plasma resonance biosensor filled with gold threads | |
| CN102410850A (en) | Reflective optical fiber sensor device | |
| CN104154883B (en) | A kind of obliquity measurement sensor based on inclined optical fiber grating fused biconical taper structure | |
| CN203432906U (en) | Refractive index optical fiber sensing probe with tapering structure | |
| CN103884364A (en) | Optical fiber interferometric sensor based on cascade connection between tapered structure and spherical structure | |
| CN103528609A (en) | Combined interference type multi-parameter optical fiber sensor | |
| CN105953958A (en) | All-silica fiber Fabry-Perot pressure sensor | |
| CN104406573A (en) | Coreless optical fiber-based tilt angle sensor capable of discriminating direction | |
| CN207964137U (en) | A kind of M-Z strain gauges based on femtosecond laser parallel micromachining | |
| CN206362461U (en) | Double microballoon temperature sensors based on silica optical fiber | |
| CN201828277U (en) | Reflective optical fiber sensor device | |
| CN108918466A (en) | A kind of multiple Michelson's interferometer based on beam splitter in optical fiber cable | |
| CN104297210A (en) | Mach-Zehnder humidity sensor based on nuclear glycan coating | |
| CN105181170A (en) | Mach-Zehnder interferometer temperature sensor based on corroded photonic crystal fibers | |
| CN110017925B (en) | Waveguide pressure sensor based on M-Z structure and detection method | |
| CN105372206A (en) | Parallel remote optical fiber sensing system for detecting various gas refractive indexes | |
| CN203785642U (en) | All-fiber bending sensor based on peanut-shaped structure | |
| CN103115570B (en) | Based on the Mach-Zahnder interference micrometric displacement sensor of telescope-type pyrometric cone structure | |
| CN102706825B (en) | Method and system for measuring concentration of chemical solution by fiber bragg gratings (FBG) | |
| CN106338349B (en) | Double microballoon temperature sensors based on silica optical fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20190520 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |