CN107796531A - A kind of full-fiber sensor - Google Patents
A kind of full-fiber sensor Download PDFInfo
- Publication number
- CN107796531A CN107796531A CN201711075723.8A CN201711075723A CN107796531A CN 107796531 A CN107796531 A CN 107796531A CN 201711075723 A CN201711075723 A CN 201711075723A CN 107796531 A CN107796531 A CN 107796531A
- Authority
- CN
- China
- Prior art keywords
- fiber
- photonic crystal
- mode fiber
- cladding structure
- full
- 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.)
- Pending
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 78
- 239000004038 photonic crystal Substances 0.000 claims abstract description 27
- 238000005253 cladding Methods 0.000 claims abstract description 24
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 16
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000010453 quartz Substances 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 8
- 239000013307 optical fiber Substances 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 3
- 238000003491 array Methods 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 230000008859 change Effects 0.000 description 8
- 238000001228 spectrum Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- 230000008033 biological extinction Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000382 optic material Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a kind of full-fiber sensor, and it includes：One ASE wideband light sources, first single-mode fiber, heterogeneous cladding structure photonic crystal fiber, second single-mode fiber and spectrometer, described first single-mode fiber one end is connected with the ASE wideband light sources, one end welding of the other end of first single-mode fiber and the heterogeneous cladding structure photonic crystal fiber, one end of second single-mode fiber is connected with the spectrometer, the other end welding of the other end of second single-mode fiber and the heterogeneous cladding structure photonic crystal fiber, the heterogeneous cladding structure photonic crystal fiber includes a surrounding layer, one pure quartz core and some mix germanium rod, the pure quartz core mixes germanium rod described in being wrapped in, the surrounding layer is wrapped in the pure quartz core.The full-fiber sensor imaged striation is clear, high sensitivity, convenient and practical, and cost is very low, is advantageous to practical application.
Description
Technical field
The present invention relates to fibre optical sensor field, and in particular to a kind of full-fiber sensor.
Background technology
Since Russell in 1992 et al. proposes photonic crystal fiber, photonic crystal fiber is from theoretical research to preparation
The application that technique arrives reality again suffers from swift and violent development.In recent years, the fibre optical sensor based on photonic crystal fiber obtains
Extensive concern.Fibre optical sensor has a series of particular advantages compared with traditional various kinds of sensors.Such as：Anti- electromagnetism is done
Disturb, stability is good, have reproducibility, high sensitivity, adverse environment resistant, high resolution, response is fast, insertion loss is low, easily with
Fiber coupling, etc. low to polarization insensitive, the simple cost of encapsulation.Fibre optical sensor can be widely used in industry, building, national defence and
Biomedicine etc..
In high temp sensitive field, challenge is proposed to many different types of fibre optical sensors.General optical fiber Bragg light
When grid (FBG) sensor works at high temperature, grating and structure can be washed off completely within several hours even a few minutes, because
This is not worth in continuous high temperature measurement occasion.Optical fibre Fabry-perot (F-P) pyrostat generally has resistant to elevated temperatures property
Can, this sensor is that the light formed using the multiple reflections of F-P optical fiber in itself is interfered to produce, when dut temperature makes optical fiber
When middle light wave respective phase changes, exporting the position of peak value of pulse will also change, so as to measurement temperature.Then
F-P cavity to be inscribed on optical fiber to usually require to use femtosecond laser, this greatly adds the preparation cost of fibre optical sensor, and
This micro-processing technology difficulty is high, and the optical fiber after inscription is also very fragile, is not suitable for practical application.Based on Mach-Zehnder (M-
Z its principle of high temperature optical fiber sensor) is that two different modes produce interference in optical fiber, thus do not need any micro Process or
Person's grating is inscribed, it is only necessary to inputs the change of beam of laser and the change can monitoring temperature in output end monitoring interference fringe
Change.Traditional M-Z high temperature optical fiber sensors mostly sensitivity is not high, and interference fringe is unintelligible, because the heat of fiber optic materials
Backscatter extinction logarithmic ratio is not high enough and the energy accounting of the Schema control of optical fiber and pattern is not reasonable.
The content of the invention
The purpose of the present invention is to be directed to above-mentioned present situation, there is provided a kind of full-fiber sensor, to solve the above problems.
The technical solution adopted by the present invention is：A kind of full-fiber sensor, including an ASE wideband light sources, the first single-mode optics
Fine, heterogeneous cladding structure photonic crystal fiber, the second single-mode fiber and spectrometer, described first single-mode fiber one end with it is described
ASE wideband light sources connect, one end of the other end of first single-mode fiber and the heterogeneous cladding structure photonic crystal fiber
Welding, one end of second single-mode fiber are connected with the spectrometer, the other end of second single-mode fiber with it is described different
The other end welding of matter cladding structure photonic crystal fiber, the heterogeneous cladding structure photonic crystal fiber include a surrounding layer,
One pure quartz core and it is some mix germanium rod, the pure quartz core be wrapped in it is described mix germanium rod, the surrounding layer is wrapped in the pure stone
Ying Xin.
The present invention effect be：The full-fiber sensor imaged striation is clear, high sensitivity, convenient and practical, and cost
It is very low, be advantageous to practical application.
Brief description of the drawings
Fig. 1 show the structural representation of full-fiber sensor provided by the invention；
Fig. 2 show the sectional view of heterogeneous cladding structure photonic crystal fiber in Fig. 1；
Fig. 3 show structural representation of the simulation using full-fiber sensor；
Fig. 4 show the transmitted spectrum of the different length heterogeneous cladding structure optical fiber；
Fig. 5 show the spectrum change situation monitored in high temperature furnace；
In figure：1-ASE wideband light sources, the 2-the first single-mode fiber, 3-high temperature furnace, 3-heterogeneous cladding structure photonic crystal
Optical fiber, 31-surrounding layer, 32-pure quartz core, 33-mix germanium rod, the 4-the second single-mode fiber, 5-spectrometer.
Embodiment
The full-fiber sensor of the present invention is introduced below in conjunction with the accompanying drawings：
As shown in figure 1, being a kind of full-fiber sensor provided by the invention, it is single that it includes an ASE wideband light sources 1, first
Mode fiber 2, heterogeneous cladding structure photonic crystal fiber 3, the second single-mode fiber 4 and spectrometer 5.
Described one end of first single-mode fiber 2 is connected with the ASE wideband light sources 1, the other end of first single-mode fiber 2
With one end welding of the heterogeneous cladding structure photonic crystal fiber 3, one end and the spectrometer of second single-mode fiber 4
5 connections, the other end welding of the other end of second single-mode fiber 4 and the heterogeneous cladding structure photonic crystal fiber 3.
As shown in Fig. 2 the heterogeneous cladding structure photonic crystal fiber 3 include a surrounding layer 31, a pure quartz core 32 and
It is some to mix germanium rod 33, the pure quartz core 32 be wrapped in it is described mix germanium rod 33, the surrounding layer 31 is wrapped in the pure quartz core
32.Some cross sectional arrangements for mixing germanium rod 33 form a triangle battle array, and some triangle battle arrays form a regular hexagon.
In the present embodiment, the external diameter of surrounding layer 31 is 125 μm, mix germanium rod a diameter of 1.75 μm, numerical aperture
Footpath is 0.22, it is described mix between germanium rod at intervals of 3.5 μm.
The heterogeneous cladding structure photonic crystal fiber 3 is placed in be detected by the full-fiber sensor in specific works
Environment in, the ASE wideband light sources 1 send light, by the heterogeneous cladding structure photonic crystal fiber 3, finally described
Spectrum is obtained on spectrometer 5, and the temperature parameter of environment to be detected is obtained by spectrum.
The introducing for mixing germanium rod adds the thermo-optical coeffecient of optical fiber, while this heterojunction structure covering causes the optical fiber branch
Hold the transmission of 2 kinds of unique patterns.When light transmits in this photonic crystal fiber, due to the effective refractive index of both patterns
Difference, a phase difference can be produced after certain length is transmitted, strong mode-interference will be produced in output end.And high heat
Backscatter extinction logarithmic ratio make it that refractive index also produces larger change when the temperature change of this optical fiber, so as to which mode-interference wavelength can also occur
Drift, the variable quantity of temperature is can be obtained by with the drift value of spectrometer supervisory wavelength.
As shown in figure 3, the adjustable high temperature furnace 6 of a temperature is added to simulate usage scenario, by the heterogeneous cladding structure
Photonic crystal fiber 3 is placed in the high temperature furnace 6, first single-mode fiber 2, second single-mode fiber 4 with it is described different
The fusion point of matter cladding structure photonic crystal fiber 3 is located at outside the high temperature furnace 6.
Fig. 4 is the transmitted spectrum of the heterogeneous cladding structure photonic crystal fiber 4 of 3 kinds of different lengths, it can be seen that the transmission
The interference fringe of spectrum is clear, and dynamic range is big, is monitored beneficial to spectrometer.
Fig. 5 is heterogeneous cladding structure photonic crystal fiber 4 to be placed on the spectrum change situation monitored in high temperature furnace 6,
Its high sensitivity reaches 90pm/ DEG C in the range of 300 DEG C to 1000 DEG C.And its spirit when using optical fiber and the heating and cooling of different length
Sensitivity is also consistent, and illustrates that the sensor stabilization performance is very good.
The full-fiber sensor imaged striation is clear, high sensitivity, convenient and practical, and cost is very low, is advantageous to reality
Apply on border.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (3)
1. a kind of full-fiber sensor, it is characterised in that it includes：One ASE wideband light sources, the first single-mode fiber, heterogeneous covering
Structure photonic crystal fiber, the second single-mode fiber and spectrometer, described first single-mode fiber one end connect with the ASE wideband light sources
Connect, one end welding of the other end of first single-mode fiber and the heterogeneous cladding structure photonic crystal fiber, described second
One end of single-mode fiber is connected with the spectrometer, the other end of second single-mode fiber and the heterogeneous cladding structure photon
The other end welding of crystal optical fibre, if the heterogeneous cladding structure photonic crystal fiber include a surrounding layer, a pure quartz core and
It is dry to mix germanium rod, the pure quartz core be wrapped in it is described mix germanium rod, the surrounding layer is wrapped in the pure quartz core.
2. full-fiber sensor according to claim 1, it is characterised in that the cross sectional arrangements for mixing germanium rod form one or three
Angular battle array, some triangle battle arrays form a regular hexagon.
3. full-fiber sensor according to claim 2, it is characterised in that the external diameter of surrounding layer 31 is 125 μm, described
Mix germanium rod a diameter of 1.75 μm, numerical aperture 0.22, it is described mix between germanium rod at intervals of 3.5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711075723.8A CN107796531A (en) | 2017-11-06 | 2017-11-06 | A kind of full-fiber sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711075723.8A CN107796531A (en) | 2017-11-06 | 2017-11-06 | A kind of full-fiber sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107796531A true CN107796531A (en) | 2018-03-13 |
Family
ID=61548843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711075723.8A Pending CN107796531A (en) | 2017-11-06 | 2017-11-06 | A kind of full-fiber sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107796531A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090041405A1 (en) * | 2007-08-09 | 2009-02-12 | Xiaoli Dai | Ridge waveguide optical sensor incorporating a Bragg grating |
| US20090207483A1 (en) * | 2007-04-06 | 2009-08-20 | Fujikura Ltd. | Photonic bandgap fiber and fiber amplifier |
| CN102564639A (en) * | 2011-12-29 | 2012-07-11 | 满文庆 | Photonic crystal fiber grating temperature sensor based on liquid filling and manufacturing method thereof |
| CN104614092A (en) * | 2015-02-12 | 2015-05-13 | 哈尔滨理工大学 | Modular interface temperature sensor of liquid-core optical fiber |
| CN107270949A (en) * | 2017-06-22 | 2017-10-20 | 武汉理工大学 | Temperature and strain dual sampling system and its measuring method |
| CN207439572U (en) * | 2017-11-06 | 2018-06-01 | 武汉长进激光技术有限公司 | A kind of full-fiber sensor |
-
2017
- 2017-11-06 CN CN201711075723.8A patent/CN107796531A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090207483A1 (en) * | 2007-04-06 | 2009-08-20 | Fujikura Ltd. | Photonic bandgap fiber and fiber amplifier |
| US20090041405A1 (en) * | 2007-08-09 | 2009-02-12 | Xiaoli Dai | Ridge waveguide optical sensor incorporating a Bragg grating |
| CN102564639A (en) * | 2011-12-29 | 2012-07-11 | 满文庆 | Photonic crystal fiber grating temperature sensor based on liquid filling and manufacturing method thereof |
| CN104614092A (en) * | 2015-02-12 | 2015-05-13 | 哈尔滨理工大学 | Modular interface temperature sensor of liquid-core optical fiber |
| CN107270949A (en) * | 2017-06-22 | 2017-10-20 | 武汉理工大学 | Temperature and strain dual sampling system and its measuring method |
| CN207439572U (en) * | 2017-11-06 | 2018-06-01 | 武汉长进激光技术有限公司 | A kind of full-fiber sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wu et al. | All single-mode fiber Mach–Zehnder interferometer based on two peanut-shape structures | |
| CN101261117A (en) | Strain transducer based on porous microstructure optical fibre | |
| Zhang et al. | A Mach–Zehnder interferometer constructed using lateral offset and a long period fiber grating for two-dimensional bending vector sensing | |
| US5218651A (en) | Optical fibre incorporating a variable internal bragg grating and its applications | |
| CN109798977A (en) | Temperature and strain measurement method based on fiber bragg grating and thin-core fibers | |
| CN104614092A (en) | Modular interface temperature sensor of liquid-core optical fiber | |
| Ghimire et al. | Highly sensitive fiber loop ringdown strain sensor with low temperature sensitivity | |
| Pan et al. | Simultaneous measurement of temperature and strain using spheroidal-cavity-overlapped FBG | |
| Cheng et al. | High-sensitivity temperature sensor based on Bragg grating in BDK-doped photosensitive polymer optical fiber | |
| Liu et al. | Dual-parameter sensor based on tapered FBG combined with microfiber cavity | |
| Niu et al. | Reflective intensity-demodulated refractometer based on S fiber taper | |
| CN109060169A (en) | A kind of pyrostat based on thin fiber | |
| Huang et al. | Highly sensitive temperature sensor based on all-fiber polarization interference filter with Vernier effect | |
| Tong et al. | Ultra-long-period fiber grating cascaded to a knob-taper for simultaneous measurement of strain and temperature | |
| Zhu et al. | Self-assembled highly sensitive hybrid structure sensor for vector curvature and temperature measurement | |
| CN102494816B (en) | Pressure sensing method based on photonic crystal fibers and sensor | |
| CN201181206Y (en) | Strain sensor based on optical fiber with porous micro-structure | |
| Jiang et al. | Simultaneous measurement of temperature and strain using a phase-shifted fiber Bragg grating inscribed by femtosecond laser | |
| CN207439572U (en) | A kind of full-fiber sensor | |
| CN116105778B (en) | Optical fiber sensing system for synchronous measurement of temperature and salt | |
| Wang et al. | Femtosecond laser refractive index modulated multimode fiber for high sensitivity vector bending measurement | |
| CN107796531A (en) | A kind of full-fiber sensor | |
| Xin et al. | Sensing characteristics of side-hole fiber-based long-period grating | |
| Zhang et al. | Highly sensitive temperature sensor based on a Mach-Zehnder interferometer created in graded index fiber | |
| Yu et al. | Study of an in-line fiber Mach-Zehnder interferometer with peanut-shape structure for refractive index sensing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |