CN106841109A - The U-shaped plastic optical fiber liquid refractive index sensor of multi-groove structure - Google Patents
The U-shaped plastic optical fiber liquid refractive index sensor of multi-groove structure Download PDFInfo
- Publication number
- CN106841109A CN106841109A CN201710069231.1A CN201710069231A CN106841109A CN 106841109 A CN106841109 A CN 106841109A CN 201710069231 A CN201710069231 A CN 201710069231A CN 106841109 A CN106841109 A CN 106841109A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- plastic optical
- groove structure
- shaped plastic
- refractive index
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/412—Index profiling of optical fibres
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
A kind of U-shaped plastic optical fiber liquid refractive index sensor of multi-groove structure, belongs to technical field of optical fiber sensing.It is made up of the U-shaped plastic optical fiber probe and photoelectric detection system of light source, multi-groove structure.The U-shaped plastic optical fiber probe of the multi-groove structure is that be vertically disposed in surface to have section by plastic optical fiber be that below the steel die of triangular sawtooth structure, vertex of a triangle points to the center line of plastic optical fiber jointly；Reuse fixture and pressure is applied to steel die, under the effect of the pressure, the multi-groove structure of multiple V-grooves is suppressed on fibre core of the plastic optical fiber along cross-sectional centerline using the triangular sawtooth structure of mould；Then the plastic optical fiber and the symmetrical another side of multi-groove structure are wound on into one to be heated on 75~95 DEG C or so of cylindrical steel column, finally apply the pulling force of a 3~6N or so at the two ends of optical fiber and prepare.The sensor has structure and a preparation process is simple, with low cost, and the characteristics of with higher sensitivity.
Description
Technical field
The invention belongs to technical field of optical fiber sensing, and in particular to a kind of U-shaped plastic optical fiber liquid refracting of multi-groove structure
Rate sensor.
Background technology
Refractive index is an important optical parametric of material, and its measurement is in food, environment, pharmacy and biochemistry
Deng field important in inhibiting.The important parameters such as strength of fluid can also be obtained by the measurement to liquid refractivity.In recent years,
Using optical fiber sensing technology measurement liquid refractivity obtained it is increasing research with application, it have electromagnetism interference, absolutely
Edge, it is anticorrosive, telework can be carried out and the advantages such as distributed sensing can be realized.
Current existing fiber liquid refractive index sensor typically uses fiber grating, for example：Number of patent application
A kind of 201210152365.7 Chinese invention patent " micro-nano fiber grating refractive index sensor " utilizes micro-nano there is provided one kind
Fiber grating realizes the measurement of liquid refractivity.But this fiber grating be by uv-exposure method, femtosecond laser inscribe method,
Prepared by focused ion beam etching method or infrared exposure method, complex process, and cost is also very high.Number of patent application
201310335715.8 Chinese invention patent " fibre optic interferometer, Fibre Optical Sensor and preparation method thereof " provides a kind of structure
Simple photonic crystal fiber F-P interferometers, can be used for the measurement of liquid refractivity.But the making of this interferometer is also required to make
With carbon dioxide laser or heat sealing machine, technique is also complex, and the photonic crystal fiber price for being used is also costly.
And the optic fibre refractive index sensor of said structure is required for measuring signal using spectrometer, so as to increased test
Cost.Therefore, a kind of structure and preparation process is simple are developed, and optic fibre refractive index sensor with low cost seems particularly heavy
Will.
The content of the invention
It is an object of the invention to provide a kind of simple structure, preparation process is simple, with low cost, and with more highly sensitive
The U-shaped plastic optical fiber liquid refractive index sensor of the multi-groove structure of degree.
To solve the above problems, as the first aspect of the present invention, there is provided a kind of U-shaped plastic optical fiber of multi-groove structure is visited
The preparation method of head, including S1：Plastic optical fiber is vertically disposed in the steel die that there is section to be triangular sawtooth structure on surface
Tool is following, and vertex of a triangle points to the center line of plastic optical fiber jointly；S2：Pressure is applied to steel die using fixture,
In the presence of pressure, multiple is suppressed on fibre core of the plastic optical fiber along cross-sectional centerline using the triangular sawtooth structure of mould
The multi-groove structure of V-groove；S3：The plastic optical fiber and the symmetrical another side of multi-groove structure are wound on one and are heated to 75~95
DEG C or so cylindrical steel column on, the pulling force of 3~6N or so is then applied at the two ends of optical fiber, so as to prepare multiple-grooved
The U-shaped plastic optical fiber probe of structure.
As the second aspect of the present invention, there is provided a kind of U-shaped plastic optical fiber liquid refractive index sensor of multi-groove structure,
It is made up of the U-shaped plastic optical fiber probe and photoelectric detection system of light source, multi-groove structure.The U of the multi-groove structure because prepared by
Plastic fibre-optical probe has symmetrical structure, and its either end can be connected with light source, and the other end is then filled with Photoelectric Detection
Put connected.
The present invention can also include：
1st, the depth of U-shaped plastic optical fiber probe multi-groove structure can apply stressed size and be controlled by alignment jig
System；Width between the groove of described U-shaped plastic optical fiber probe multi-groove structure, V-groove angle and total length can be by using having
The steel die of different tooth widths, zigzag angle and different length is changed.
2nd, the U-shaped plastic optical fiber probe of multi-groove structure can change optical fiber by using the cylindrical steel column of different-diameter
The bending radius of probe.
3rd, on the one hand the U-shaped plastic optical fiber probe of multi-groove structure can produce bigger loss and stronger disappearance
, so as to more sensitive to the variations in refractive index of surrounding environment because the fibre-optical probe of this structure can increase sandwich layer mould with
The coupling efficiency of cladding mode and radiation mode, when ambient refractive index of popping one's head in changes, the total reflection condition of transmission light in optical fiber
Easily it is destroyed, this can cause its loss that obvious change occurs；On the other hand, U-shaped sonde configuration is conducive to sensing
The design of device and operation.
4th, described plastic optical fiber is multimode plastic optical fiber, and the external diameter of optical fiber is 250~1500 μm, and core diameter scope is
240~1480 μm.
5th, the depth of the multi-groove structure of the U-shaped plastic optical fiber probe of described multi-groove structure is 50~500 μm, multi-groove structure
Groove between width be 0.5~2.5mm, the total length of multi-groove structure is 0.5~23mm, and V-groove angle is 30~150 °.
6th, the bending radius of the U-shaped plastic optical fiber probe of described multi-groove structure is 2~7mm.
7th, described light source can be the semiconductor laser, or center emission wavelength that launch wavelength is 650nm
It is the LED of 650nm；Described photoelectric detection system is light power meter.
The present invention is using the biography produced when being contacted with fluid to be measured of the U-shaped plastic optical fiber probe with multi-groove structure
The measurement of refractive index is realized in the change of defeated loss, and the U-shaped plastic optical fiber probe with multi-groove structure can increase sensor
To the sensitiveness of surrounding environment variations in refractive index, the high-sensitivity measurement to liquid refractivity is realized.
The present invention is the principle based on long-period fiber grating, and the multi-groove structure prepared on plastic optical fiber can cause optical fiber
Power coupling between middle transmission mode, so as to loss can be produced.
By the plastic optical fiber for being used is multimode plastic optical fiber, with substantial amounts of sandwich layer mould and cladding mode, their coupling
Close and occur on all of wave band, wavelength is unsolvable, therefore the sensor is more suitable for intensity modulated and is adjusted rather than wavelength
System.Coupling between pattern result in the generation of loss, and this coupling includes coupling of the sandwich layer mould with cladding mode and sandwich layer mould
With the coupling of radiation mode.Radiation mode can be leaked to the outside of fiber core layer and covering, enter into the middle of surrounding medium.U-shaped knot
Structure can be such that more sandwich layer moulds are coupled with cladding mode and radiation mode, so as to cause more losses, increase sensor
Sensitivity.Loss produced by this coupling can be modulated by the variations in refractive index of surrounding environment, therefore be passed by monitoring
The change of defeated loss can be obtained by the change of testing liquid refractive index.In addition, by strength of fluid and the relation of refractive index, should
Sensor can also be used to measure the concentration of liquid.
Compared with prior art, the invention has the advantages that：
1) the grating writing equipment that the making of index sensor sensing probe of the invention need not be complicated, it is not required that
Corrosion or rubbing down, manufacture craft are simple, are easily controlled, with low cost, are easy to commercially produce.
2) light source of index sensor of the invention uses semiconductor laser or LED, and its is cheap, and only
The change of output signal need to be detected using light power meter, the cost of whole sensor is which decreased.
3) index sensor of the invention uses multimode plastic optical fiber, and its core diameter is larger, and pliability is good, therefore behaviour
Make simple, and the working sensor, in visible light wave range, installation and debugging are all very simple.
4) the U-shaped plastic optical fiber probe measurement liquid refractivity of the multi-groove structure that index sensor of the invention is used
With sensitivity higher.
Brief description of the drawings
Fig. 1 is the structural representation of plastic optical fiber index sensor of the invention；
Fig. 2 is the manufacturing process schematic diagram of multi-groove structure plastic optical fiber of the invention；
Fig. 3 is the schematic diagram with multi-groove structure plastic optical fiber of the invention；
Fig. 4 is the manufacturing process schematic diagram of the U-shaped plastic optical fiber probe with multi-groove structure of the invention；
Fig. 5 is the relation and matched curve figure of the liquid refractivity with loss of apparatus of the present invention measurement.
Specific embodiment
Specific implementation of the invention is described in further detail below in conjunction with the accompanying drawings, but implementation of the invention and protection
Scope not limited to this, substantive identical equivalent are made to the present invention and belong to protection scope of the present invention.Embodiment 1：To survey
As a example by amount glycerine water solution
Referring to Fig. 1, the U-shaped plastic optical fiber index sensor of multi-groove structure of the invention, by light source 1, multi-groove structure
Plastic optical fiber sensing probe 2 and light power meter 3 are constituted.Because made fibre-optical probe has a symmetrical structure, light source can be with
The either end of fibre-optical probe is connected by optical fiber, and the other end of fibre-optical probe is then connected by optical fiber with light power meter.In work
When making, the light that light source 1 sends reaches the U-shaped plastic optical fiber probe 2 with multi-groove structure by optical fiber, when with multi-groove structure
U-shaped plastic optical fiber probe 2 when being inserted into detected solution, optical signal generates interaction with detected solution, after modulating
Optical signal be input in the middle of light power meter through optical fiber, light power meter is by opto-electronic conversion and signal transacting by detected light
Performance number shows that shown optical power value can change with the change of the refractive index value of solution.Obtained by measurement
Optical power value can calculate loss, loss is calculated by following formula,
Loss=-10*log (Ps/Pw)dB
P in formulasAnd PwThe average optical output power of detector when being respectively the glycerine water solution and deionized water of measurement.
The corresponding loss of different refractivity (concentration) glycerine water solution can be calculated by measuring optical power value
Value (refractive index or concentration are known), and then the response curve obtained between loss and refractive index (concentration) is fitted, recycle
This response curve, the loss value obtained by measurement can just calculate the refractive index value of glycerine water solution.
Referring to Fig. 2, the multimode that the plastic optical fiber that the present embodiment is used is produced for Jiangxi Dasheng POF Co., Ltd.
Commercial plastic optical fiber, the external diameter of optical fiber is 1000 ± 1 μm, and core diameter is 980 ± 1 μm.Can will be many using the method for compression molding
Slot structure is prepared on plastic optical fiber 4.Making the device with multi-groove structure plastic optical fiber includes the steel of triangular sawtooth structure
Molding jig 5 and fixture 6.Specifically preparation method is：Plastic optical fiber 4 is vertically disposed in the steel with triangular sawtooth structure
Below mould 5, pressure is then applied to steel die 5 by fixture 6, under the effect of the pressure, can be formed on plastic optical fiber 4
Multi-groove structure；
Referring to Fig. 3, the plastic optical fiber 7 with multi-groove structure mainly has four technical indicators, respectively：Many groove depths, V-type
Width and many slot lengths between the angle of the v-groove, groove.Fig. 2 is referred to, by the pressure applied size of alignment jig 6, the sawtooth of mould 5
The length of the size and mould of shape angle and tooth width, thus it is possible to vary the technical indicator of above-mentioned multi-groove structure.Preferably, it is many
Groove depth is 200 μm, and V-groove angle is 60 °, and width is 1mm between groove, and many slot lengths are 10mm.
Referring to Fig. 4, the plastic optical fiber 7 with multi-groove structure is made U-shaped optical fiber by the present embodiment using the method for thermal finalization
Probe.Specifically preparation method is：The plastic optical fiber 7 and the symmetrical another side of multi-groove structure are wound on one and are heated to 80
DEG C cylindrical steel column 8 on, then apply the pulling force of 5N or so at the two ends of optical fiber, so as to one can be obtained with multiple-grooved
The U-shaped plastic optical fiber probe 2 of structure.Preferably, the bending radius of U-shaped plastic optical fiber probe is 3mm.
Fig. 5 is that the different refractivity value measured by the U-shaped plastic optical fiber index sensor of the multi-groove structure for making is (dense
Degree) glycerine water solution response curve.Need to be immersed in plastic optical fiber sensing probe in the middle of glycerine water solution during measurement, so
The Output optical power of read detector afterwards, we record ten groups of data for measurement each time, and using their average value as
The output valve of sensor.Cleaned, it is necessary to will be popped one's head in using alcohol and deionized water after measuring each time, then dry up to enter again
Row measurement next time.Finally the result obtained by measurement is given in the form of loss, referring to described in Fig. 1, thus
The response curve of the sensor is obtained.
The refractometry scope of the sensor is 1.333~1.410, and its measurement sensitivity S can be by response curve
Slope determines that it can be expressed as,
Wherein L and n are respectively loss and refractive index, and the sensitivity of the sensor is up to 111.30dB/RIU (RI
Unit), resolution ratio is 7.81 × 10-4RIU。
Further, since the glycerine water solution of different refractivity value is obtained by changing the volume fraction of glycerine in solution
, therefore the relation that can also be set up between loss and glycerol concentration (volume fraction).
The different volumes concentration of glycerine water solution is as shown in table 1 with the corresponding relation of refractive index.
Table 1：The different volumes concentration of glycerite and the corresponding relation of refractive index
| Glycerite volumetric concentration (%) | Correspondence refractive index |
| 0 | 1.333 |
| 5.38 | 1.340 |
| 13.08 | 1.350 |
| 20.77 | 1.360 |
| 28.46 | 1.370 |
| 36.15 | 1.380 |
| 43.85 | 1.390 |
| 51.54 | 1.400 |
| 59.23 | 1.410 |
Claims (6)
1. the U-shaped plastic optical fiber liquid refractive index sensor of a kind of multi-groove structure, it is characterised in that：By light source, the U of multi-groove structure
Plastic fibre-optical probe and photoelectric detection system are constituted, and one end of the U-shaped plastic optical fiber probe of multi-groove structure is connected with light source,
The other end is then connected with photoelectric detection system；And the U-shaped plastic optical fiber probe of the multi-groove structure is prepared by following steps,
S1：It is triangle below the steel die of triangular sawtooth structure that plastic optical fiber be vertically disposed in surface to be had section
Summit point to the center line of plastic optical fiber jointly；
S2：Pressure is applied to steel die using fixture, under the effect of the pressure, using the triangular sawtooth structure of mould in modeling
Material optical fiber suppresses the multi-groove structure of multiple V-grooves along the fibre core of cross-sectional centerline；
S3：The plastic optical fiber and the symmetrical another side of multi-groove structure are wound on a cylinder for being heated to 75~95 DEG C or so
On shape steel column, the pulling force of a 3~6N or so is then applied at the two ends of optical fiber, so as to prepare the U-shaped modeling of multi-groove structure
Material fibre-optical probe.
2. the U-shaped plastic optical fiber liquid refractive index sensor of a kind of multi-groove structure as claimed in claim 1, it is characterised in that：
Plastic optical fiber is multimode plastic optical fiber, and the external diameter of optical fiber is 250~1500 μm, and core diameter is 240~1480 μm.
3. the U-shaped plastic optical fiber liquid refractive index sensor of a kind of multi-groove structure as claimed in claim 1, it is characterised in that many
The depth of slot structure is that width is 0.5~2.5mm between 50~500 μm, the groove of multi-groove structure, and the total length of multi-groove structure is 0.5
~23mm, V-groove angle is 30~150 °.
4. the U-shaped plastic optical fiber liquid refractive index sensor of a kind of multi-groove structure as claimed in claim 1, it is characterised in that：
The bending radius of the U-shaped plastic optical fiber probe of multi-groove structure is 2~7mm.
5. the U-shaped plastic optical fiber liquid refractive index sensor of a kind of multi-groove structure as claimed in claim 1, it is characterised in that：
Light source is that the semiconductor laser or center emission wavelength that launch wavelength is 650nm are the LED of 650nm.
6. the U-shaped plastic optical fiber liquid refractive index sensor of a kind of multi-groove structure as claimed in claim 1, it is characterised in that：
Photoelectric detection system is light power meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710069231.1A CN106841109B (en) | 2017-02-08 | 2017-02-08 | The U-shaped plastic optical fiber liquid refractive index sensor of multi-groove structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710069231.1A CN106841109B (en) | 2017-02-08 | 2017-02-08 | The U-shaped plastic optical fiber liquid refractive index sensor of multi-groove structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106841109A true CN106841109A (en) | 2017-06-13 |
| CN106841109B CN106841109B (en) | 2019-04-05 |
Family
ID=59122655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710069231.1A Expired - Fee Related CN106841109B (en) | 2017-02-08 | 2017-02-08 | The U-shaped plastic optical fiber liquid refractive index sensor of multi-groove structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106841109B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478605A (en) * | 2017-07-17 | 2017-12-15 | 吉林大学 | A kind of U-shaped plastic optical fiber long-period gratings surface plasma liquid refractive index sensor |
| CN107917898A (en) * | 2018-01-10 | 2018-04-17 | 吉林大学 | One kind is based on mechanical compaction type long period Plastic Fiber Gratings index sensor |
| CN108287146A (en) * | 2018-01-17 | 2018-07-17 | 合肥工业大学 | Based on evanescent field principle polymer optical fiber Random Laser sensing testing method |
| CN108801156A (en) * | 2018-07-20 | 2018-11-13 | 桂林电子科技大学 | A kind of plastic optical fiber displacement sensor and preparation method thereof |
| CN110044441A (en) * | 2018-01-17 | 2019-07-23 | 桂林电子科技大学 | A kind of plastic optical fiber liquid level sensor of more tooth type structures and preparation method thereof |
| CN110672135A (en) * | 2019-11-18 | 2020-01-10 | 哈尔滨理工大学 | Fiber bragg grating ultraviolet sensing method and device capable of compensating temperature |
| CN111141685A (en) * | 2019-12-16 | 2020-05-12 | 西安交通大学 | Optical fiber probe sensor and preparation method thereof |
| CN111552022A (en) * | 2020-03-29 | 2020-08-18 | 桂林电子科技大学 | Grating inscription technology suitable for optical fiber core in any shape and distribution |
| CN112098366A (en) * | 2020-07-27 | 2020-12-18 | 桂林电子科技大学 | Embedded double-U-shaped refractive index sensor for realizing three Fano resonances |
| CN114034664A (en) * | 2021-11-10 | 2022-02-11 | 山东省科学院激光研究所 | Plastic optical fiber refractive index sensor based on V-shaped structure and working method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4994682A (en) * | 1989-05-19 | 1991-02-19 | Focal Technologies Incorporated | Fiber optic continuous liquid level sensor |
| US5712934A (en) * | 1996-07-25 | 1998-01-27 | Johnson; Douglas M. | Fiber optic infrared sensor |
| US6282341B1 (en) * | 1998-12-22 | 2001-08-28 | The Board Of Trustees Of The Leland Stanford Junior University | Tunable, mechanically induced long-period fiber grating with enhanced polarizing characteristics |
| US20030209655A1 (en) * | 2002-05-08 | 2003-11-13 | Anbo Wang | Optical fiber sensors based on pressure-induced temporal periodic variations in refractive index |
| US20040202424A1 (en) * | 2003-04-08 | 2004-10-14 | Institut National D'optique | Prismatic reflection optical waveguide device |
| CN102495023A (en) * | 2011-11-22 | 2012-06-13 | 电子科技大学 | Method for determining liquid medium refractive index by using optical fiber sensing technology |
| CN104266999A (en) * | 2014-10-20 | 2015-01-07 | 吉林大学 | Measurement instrument for refractive index of liquid based on D type plastic optical fiber probe |
-
2017
- 2017-02-08 CN CN201710069231.1A patent/CN106841109B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4994682A (en) * | 1989-05-19 | 1991-02-19 | Focal Technologies Incorporated | Fiber optic continuous liquid level sensor |
| US5712934A (en) * | 1996-07-25 | 1998-01-27 | Johnson; Douglas M. | Fiber optic infrared sensor |
| US6282341B1 (en) * | 1998-12-22 | 2001-08-28 | The Board Of Trustees Of The Leland Stanford Junior University | Tunable, mechanically induced long-period fiber grating with enhanced polarizing characteristics |
| US20030209655A1 (en) * | 2002-05-08 | 2003-11-13 | Anbo Wang | Optical fiber sensors based on pressure-induced temporal periodic variations in refractive index |
| US20040202424A1 (en) * | 2003-04-08 | 2004-10-14 | Institut National D'optique | Prismatic reflection optical waveguide device |
| CN102495023A (en) * | 2011-11-22 | 2012-06-13 | 电子科技大学 | Method for determining liquid medium refractive index by using optical fiber sensing technology |
| CN104266999A (en) * | 2014-10-20 | 2015-01-07 | 吉林大学 | Measurement instrument for refractive index of liquid based on D type plastic optical fiber probe |
Non-Patent Citations (2)
| Title |
|---|
| CHUAN-XIN TENG ET AL.: "The influence of temperature to a refractive index sensor based on a macro-bending tapered plastic optical fiber", 《OPTICAL FIBER TECHNOLOGY》 * |
| 滕传新等: "微／纳米塑料光纤的制备及其折射率传感特性研究", 《光电子· 激光》 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478605A (en) * | 2017-07-17 | 2017-12-15 | 吉林大学 | A kind of U-shaped plastic optical fiber long-period gratings surface plasma liquid refractive index sensor |
| CN107917898A (en) * | 2018-01-10 | 2018-04-17 | 吉林大学 | One kind is based on mechanical compaction type long period Plastic Fiber Gratings index sensor |
| CN108287146B (en) * | 2018-01-17 | 2021-05-04 | 合肥工业大学 | Polymer optical fiber random laser sensing test method based on evanescent field principle |
| CN108287146A (en) * | 2018-01-17 | 2018-07-17 | 合肥工业大学 | Based on evanescent field principle polymer optical fiber Random Laser sensing testing method |
| CN110044441A (en) * | 2018-01-17 | 2019-07-23 | 桂林电子科技大学 | A kind of plastic optical fiber liquid level sensor of more tooth type structures and preparation method thereof |
| CN108801156A (en) * | 2018-07-20 | 2018-11-13 | 桂林电子科技大学 | A kind of plastic optical fiber displacement sensor and preparation method thereof |
| CN110672135A (en) * | 2019-11-18 | 2020-01-10 | 哈尔滨理工大学 | Fiber bragg grating ultraviolet sensing method and device capable of compensating temperature |
| CN111141685A (en) * | 2019-12-16 | 2020-05-12 | 西安交通大学 | Optical fiber probe sensor and preparation method thereof |
| CN111141685B (en) * | 2019-12-16 | 2021-05-28 | 西安交通大学 | Optical fiber probe sensor and preparation method thereof |
| CN111552022A (en) * | 2020-03-29 | 2020-08-18 | 桂林电子科技大学 | Grating inscription technology suitable for optical fiber core in any shape and distribution |
| CN111552022B (en) * | 2020-03-29 | 2022-04-19 | 桂林电子科技大学 | Grating inscription technology suitable for optical fiber core in any shape and distribution |
| CN112098366A (en) * | 2020-07-27 | 2020-12-18 | 桂林电子科技大学 | Embedded double-U-shaped refractive index sensor for realizing three Fano resonances |
| CN112098366B (en) * | 2020-07-27 | 2022-10-25 | 桂林电子科技大学 | Embedded double-U-shaped refractive index sensor for realizing three Fano resonances |
| CN114034664A (en) * | 2021-11-10 | 2022-02-11 | 山东省科学院激光研究所 | Plastic optical fiber refractive index sensor based on V-shaped structure and working method thereof |
| CN114034664B (en) * | 2021-11-10 | 2024-03-01 | 山东省科学院激光研究所 | Plastic optical fiber refractive index sensor based on V-shaped structure and working method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106841109B (en) | 2019-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106841109B (en) | The U-shaped plastic optical fiber liquid refractive index sensor of multi-groove structure | |
| CN100367016C (en) | Fibre-optical temperature measuring device and measurement thereof | |
| CN209147930U (en) | A kind of high-resolution single mode multimode single mode micro-displacement fibre optical sensor | |
| US7138621B2 (en) | Optical fiber sensors based on pressure-induced temporal periodic variations in refractive index | |
| EP2828622B1 (en) | A sensor for combined temperature, pressure, and refractive index detection | |
| CN105371785B (en) | A kind of curvature measurement method | |
| CN102879357A (en) | Micro-nano fiber bragg grating refractive index sensor and manufacturing method thereof | |
| CN104568019A (en) | Multimode fiber-based method and multimode fiber-based system for simultaneously measuring temperature and strain | |
| CN109632133A (en) | A kind of temperature measuring device and method based on optical fiber | |
| CN104154883A (en) | Inclination angle measuring sensor based on fused biconical taper structure of inclined fiber bragg grating | |
| CN108917800B (en) | Coreless optical fiber hybrid sensor and experimental system | |
| CN106932364A (en) | Tapered fiber liquid refractive index sensor is drawn in macrobending dislocation | |
| CN107917898A (en) | One kind is based on mechanical compaction type long period Plastic Fiber Gratings index sensor | |
| CN110389111A (en) | One kind being based on bimodulus core shift optical fiber interference type index sensor | |
| Dong et al. | Liquid refractive index sensor based on polymer fiber with micro-holes created by femtosecond laser | |
| Brientin et al. | Numerical and experimental study of a multimode optical fiber sensor based on Fresnel reflection at the fiber tip for refractive index measurement | |
| CN110044441A (en) | A kind of plastic optical fiber liquid level sensor of more tooth type structures and preparation method thereof | |
| Chen et al. | Temperature-insensitive gas pressure sensor based on photonic crystal fiber interferometer | |
| CN110823834B (en) | High-sensitivity SPR refractive index sensor based on plastic optical fiber periodic narrow groove structure | |
| Deng et al. | Twisted tapered plastic optical fibers for continuous liquid level sensing | |
| CN201828277U (en) | Reflective optical fiber sensor device | |
| CN103364105B (en) | Optical fiber refractive index and temperature sensor based on multiple-mode interference and measuring method thereof | |
| Jin et al. | Ultrasensitive liquid level sensor based on slice-shaped composite long period fiber grating | |
| Liyun et al. | Optical fiber sensor determination of the water salinity based on surface plasmon resonance | |
| CN109143461B (en) | Step index optical fiber with similar strength and multi-peak Brillouin gain spectrum |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190405 Termination date: 20200208 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |