CN110455346A - It is a kind of for measuring the fibre optical sensor of seawater thermohaline depth - Google Patents
It is a kind of for measuring the fibre optical sensor of seawater thermohaline depth Download PDFInfo
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- CN110455346A CN110455346A CN201910860499.6A CN201910860499A CN110455346A CN 110455346 A CN110455346 A CN 110455346A CN 201910860499 A CN201910860499 A CN 201910860499A CN 110455346 A CN110455346 A CN 110455346A
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- fibre
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- 239000000835 fiber Substances 0.000 title claims abstract description 34
- 230000003287 optical effect Effects 0.000 title claims abstract description 24
- 239000013535 sea water Substances 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000004038 photonic crystal Substances 0.000 claims abstract description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 230000035945 sensitivity Effects 0.000 abstract description 10
- 239000013307 optical fiber Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002082 metal nanoparticle Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010001488 Aggression Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/3537—Optical fibre sensor using a particular arrangement of the optical fibre itself
- G01D5/3538—Optical fibre sensor using a particular arrangement of the optical fibre itself using a particular type of fiber, e.g. fibre with several cores, PANDA fiber, fiber with an elliptic core or the like
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of for measuring the fibre optical sensor of seawater thermohaline depth, it is the fibre core of photonic crystal including material, the outside of the fibre core is fixedly connected with covering, multiple airports are provided on the covering, the airport is symmetricly set in covering, wherein two neighboring airport opens the notch for being provided with that cross section is W towards extraneous direction, and the surface of the notch plates film.The sensor is using fan-shaped micro-structure photonic crystal fiber, and compared to traditional fiber, the technique of plated film and filling is all relatively simple, easy batch machining production；The airport of this sector microstructured optical fibers removal is adjacent and area is big, and plated film is more simple and convenient；The present invention uses LMR and SPR effect simultaneously, and wherein LMR can resonate under p and s polarised light, greatly improves its sensitivity with precision.
Description
Technical field
The present invention relates to sensor technical fields more particularly to a kind of for measuring the fibre optical sensor of seawater thermohaline depth.
Background technique
In recent years, fibre optical sensor becomes the another research hotspot of physical field.Thin film cladding optical fiber was passing light in recent years
When the resonance of generated electromagnetic wave, be found to can be used for the production of fibre optical sensor.There are fibre optical sensor other tradition to pass
The advantages of sensor does not have, it is small in size, without electromagnetic interference, high sensitivity, at the same time, refractive index this physical quantity can with permitted
More properties connect, therefore can be used to measure concentration, and humidity identifies biological respinse.
Surface plasma body resonant vibration (SPR) refers to that light wave can be with suddenly when light wave transmits in the medium and reaches interface
The form of field of dying enters in metal layer, as long as at this moment light wave evanscent field meets the resonance condition of metal layer plasma, then,
The part light-wave energy for meeting condition will be converted to the concussion energy of plasma wave.This sensor is made to need expensive
In metal nanoparticle modification to optical fiber, the preparation of sensor is carried out using the SPR effect of metal nanoparticle, is had to week
It encloses media environment sensitivity and facilitates the characteristic of modification.
Loss mode resonance effect (LMR) is a kind of resonance effects being suggested in recent years.It is suggested after in recent years
Time in, the fibre optical sensor based on LMR effect is applied to rapidly the research of refractive index sensing, and attached in low-refraction
Nearly sensitivity also with higher.LMR refers to intercoupling between the loss mode in evanescent wave and conductive metal oxide
The resonance of generation.The intensity of the light transmitted in optical waveguide when it occurs will drastically reduce, to form resonance trough.LMR effect
Very sensitive to extraneous refractive index, when extraneous variations in refractive index, the resonance trough of LMR can also generate corresponding change, reflect outer
Therefore the variations in refractive index of boundary's substance can be obtained to be measured by refraction rate conversion.Compared with Other blood lipids analyzer, base
There is following distinguishing feature in the instrument of the sensing technology of LMR effect: first, highly sensitive and high-resolution, up to the present
Compared to the fibre optical sensor of other class shapes, two orders of magnitude of sensitivity enhancement of optical fiber LMR sensor can achieve 300,
000nm/RIU.Second, production cost is low, is easy to produce in batches.
Although there are numerous good characteristics based on LMR fibre optical sensor, because it measures the unicity of target, it is difficult wide
It is general to be used to measure complicated solution.
Summary of the invention
According to problem of the existing technology, the invention discloses a kind of for measuring the Fibre Optical Sensor of seawater thermohaline depth
Device, specific structure include: the fibre core that material is photonic crystal, and the outside of the fibre core is fixedly connected with covering, on the covering
There are six airport, the airports to be symmetricly set in covering for setting, wherein direction of the two neighboring airport towards the external world
Open the notch for being provided with that cross section is W.
Further, the notch includes being removed air hole surface, the Coating Materials for being removed air hole surface
For TiO2, other airport surface coating materials are golden film.
Further, the thickness of identical, wherein two neighboring airport the boundary separation layer of the size of six airports
Degree is 2 μm.
Further, the plated film TiO for being removed air hole surface2With a thickness of 80nm -100nm, wherein airport
Surface golden film with a thickness of 50nm.
Six airports include the first airport, first airport and its about substantially symmetrical about its central axis another
Hot optical sensitive material is filled in airport.
By adopting the above-described technical solution, provided by the invention a kind of for measuring the Fibre Optical Sensor of seawater thermohaline depth
Device, the sensor is using fan-shaped micro-structure photonic crystal fiber, and compared to traditional optical fiber, the technique of plated film and filling is all more
Simply, therefore easily batch machining production；The airport of this sector microstructured optical fibers removal is adjacent and area is big, and plated film is more simple
It is convenient；The present invention uses LMR and SPR effect simultaneously, and wherein LMR can resonate under p and s polarised light, makes its sensitivity
It is greatly improved with precision；The sensor can efficiently solve the problems, such as that its measurement target is single, make its collection high-precision, highly sensitive
Degree, it is multi-functional, have huge practical value.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 for the used optical fiber of the present invention structural schematic diagram；
Fig. 2 is the cross section structure schematic diagram of the fibre optical sensor of measurement seawater thermohaline depth provided by the invention；
Fig. 3 is variation schematic diagram of the salinity for projection spectrum；
Fig. 4 is salinity to red shift amount matched curve result schematic diagram；
Fig. 5 is the result schematic diagram that transmitted light trough red shift amount varies with temperature；
Fig. 6 is result schematic diagram of the transmitted light trough red shift amount with stress variation.
1, fibre core, 2, covering, 3, airport, 4, golden film, 5, be removed air hole surface, 6, notch, the 31, first air
Hole.
Specific embodiment
To keep technical solution of the present invention and advantage clearer, with reference to the attached drawing in the embodiment of the present invention, to this
Technical solution in inventive embodiments carries out clear and complete description:
As depicted in figs. 1 and 2 is a kind of for measuring the fibre optical sensor of seawater thermohaline depth, the fibre core including photonic crystal
1, it is fixedly connected with covering 2 in the outside of fibre core 1, multiple airports 3 are provided in covering 2, wherein airport 3 is symmetrical arranged
In covering 2, two neighboring airport 3 opens the notch 6 for being provided with that cross section is W towards extraneous direction.
Further, notch 6 includes being removed air hole surface 5, and the Coating Materials for being removed air hole surface 5 is
TiO2, other 3 surface coating materials of airport are golden film 4.Wherein plated film TiO2With a thickness of 80nm -100nm, wherein air
3 surface golden film 4 of hole with a thickness of 50nm.
Further, the size of the airport 3 is identical, wherein the thickness of the boundary separation layer of two neighboring airport 3
It is 2 μm.
Six airports 3 include identical first airport 31 of four structures, first airport 31 and Qi Guan
Hot optical sensitive material is filled in another airport 31 substantially symmetrical about its central axis.
Embodiment:
As shown in Fig. 2, the present invention uses diameter for the photonic crystal fiber of 125um, material is quartz glass, core centre
There is no airport, core diameter 15um.Prolong and is provided with multiple fan-shaped airports in the extending direction of fibre core, hexagonal arrangement,
The diameter of fan-shaped airport is 100um, and the distance between adjacent sector airport is 2um, can use femto-second laser removal
Two adjacent vacant stomatal limiting value notches retain remaining four airports, and notch is W type, can more effectively utilize evanscent field, protect
Stay remaining four airports.TiO2 film layer can be coated using magnetron sputtering method at dew core, be selected in air hole inwall
Property one layer of golden film of plating, be passed through temperature sensitive liquid in airport.When temperature changes, the refractive index of temperature sensitive liquid can change, in turn
Resonant wavelength is influenced, to realize the measurement of ocean temperature.When stress changes, deformation occurs for optical fiber, leads to golden film
SPR effect, and since temperature sensitive liquid joined the stomata of measurement temperature, influence of the stress bring SPR effect to thermometric can neglect
Slightly disregard, so, the stomata of golden film is coated with by two, it can effective and independent measurement stress intensity.At the same time, also by
The LMR effect that TiO2 film plating layer occurs achievees the purpose that survey refractive index.Thus this sensor can realize three-parameter measuring.
Firstly, it is necessary to response of the detection sensor structure to seawater salinity.Seawater salinity is simultaneously by dissolution substance and temperature
Influence.When Wendu1 is constant, salinity altercation determines effective refractive index, the ranges of indices of refraction (n=of it and linear correlation
1.3331+0.185S).Herein using simulated measurement variation of the salinity to transmitted spectrum, as shown in Figure 3.With the increasing of salinity
Add, it is mobile to long wave direction that LMR loses paddy, amount of movement with salinity matched curve as shown in figure 4, the linearity is good, sensitivity
It is higher.
Sensor also measures the response of ocean temperature.Temperature mainly passes through the optical property for changing temperature sensitive liquid
To change output spectrum.Under the control of other conditions, the amount of movement variation with temperature of spectrum is as shown in figure 5, SPR effect produces
Raw Y polarization loss paddy occupies leading position, and X polarization is barely affected.As seen from Figure 5, sensor has good linear,
Lesser demodulating error and higher sensitivity (α=- 6.44nm/K).
Sensor also measures the response of seawater pressure.When fibre-optical bending or when being pressed, cross-sectional shape
It will become oval from circularity.Find that fibre-optical bending is bigger by comsol simulation result, the ovality of cross section is bigger.By
Strain caused by bending and pressing is also by the loss peak in the loss spectra for changing proposed spr sensor.Fig. 6, which is shown, to be worked as
Temperature loses the wavelength amount of movement at peak at differently strained lower two with the matched curve of stress variation when 20 DEG C stable.It can be seen that λ
1 loss peak corresponding with λ 2 is higher with the sensitivity of temperature, and respectively 1.90 × 10-4Nm/ μ ε and 1.30 × 10-3Nm/ μ ε, and
The linearity is good.
It can thus be seen that possessing higher while fibre optical sensor of the invention measures 3 kinds of physical quantitys at the same time
Sensitivity and resolution ratio.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of for measuring the fibre optical sensor of seawater thermohaline depth, characterized by comprising: material is the fibre core of photonic crystal
(1), the outside of the fibre core (1) is fixedly connected with covering (2), and there are six airport (3) for setting on the covering (2), described
Airport (3) is symmetricly set in covering (2), wherein two neighboring airport (3) is opened towards extraneous direction is provided with cross
Section is the notch (6) of W.
2. fibre optical sensor according to claim 1, it is further characterized in that: the notch (6) includes being removed airport
Surface (5), the Coating Materials for being removed air hole surface (5) are TiO2, other airport (3) surface coating materials are gold
Film (4).
3. fibre optical sensor according to claim 1, it is further characterized in that: the size of six airports (3) is identical,
Wherein the boundary separation layer of two neighboring airport (3) with a thickness of 2 μm.
4. fibre optical sensor according to claim 2, it is further characterized in that: the plating for being removed air hole surface (5)
Film TiO2With a thickness of 80nm -100nm, wherein airport (3) surface golden film (4) with a thickness of 50nm.
5. fibre optical sensor according to claim 4, it is further characterized in that: six airports (3) include first empty
Stomata (31), first airport (31) and its about in another airport (3) substantially symmetrical about its central axis be filled with hot optics
Sensitive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910860499.6A CN110455346A (en) | 2019-09-11 | 2019-09-11 | It is a kind of for measuring the fibre optical sensor of seawater thermohaline depth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910860499.6A CN110455346A (en) | 2019-09-11 | 2019-09-11 | It is a kind of for measuring the fibre optical sensor of seawater thermohaline depth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110455346A true CN110455346A (en) | 2019-11-15 |
Family
ID=68491758
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910860499.6A Pending CN110455346A (en) | 2019-09-11 | 2019-09-11 | It is a kind of for measuring the fibre optical sensor of seawater thermohaline depth |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110887525A (en) * | 2019-12-02 | 2020-03-17 | 中国人民解放军国防科技大学 | CTD sensing array based on micro-nano optical fiber coupler SAGNAC ring |
| CN111175893A (en) * | 2020-01-05 | 2020-05-19 | 复旦大学 | Microstructure optical fiber polarizer with adjustable working wavelength |
| CN111208601A (en) * | 2020-03-30 | 2020-05-29 | 东北石油大学 | Polarization filter for simultaneously filtering orthogonally polarized light at communication wavelength |
| CN111239092A (en) * | 2020-03-12 | 2020-06-05 | 中国医学科学院阜外医院 | Optical fiber type CO2、O2Concentration rapid acquisition probe |
| CN112284567A (en) * | 2020-10-19 | 2021-01-29 | 东北大学 | Cascade soliton self-frequency-shift all-fiber sensing system and method for measuring sea water temperature and salt |
| CN113916838A (en) * | 2021-12-14 | 2022-01-11 | 山东省科学院海洋仪器仪表研究所 | Seawater temperature and salt sensor based on double resonance effect, and measuring system and method |
| CN114136919A (en) * | 2021-11-30 | 2022-03-04 | 哈尔滨理工大学 | Near-infrared band based dual-peak PCF humidity and stress dual-parameter sensing system |
| CN114544542A (en) * | 2021-11-30 | 2022-05-27 | 哈尔滨理工大学 | Near-infrared waveband based double-peak PCF magnetic field and stress double-parameter sensing system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110887525A (en) * | 2019-12-02 | 2020-03-17 | 中国人民解放军国防科技大学 | CTD sensing array based on micro-nano optical fiber coupler SAGNAC ring |
| CN110887525B (en) * | 2019-12-02 | 2021-06-04 | 中国人民解放军国防科技大学 | CTD sensing array based on micro-nano optical fiber coupler SAGNAC ring |
| CN111175893A (en) * | 2020-01-05 | 2020-05-19 | 复旦大学 | Microstructure optical fiber polarizer with adjustable working wavelength |
| CN111239092A (en) * | 2020-03-12 | 2020-06-05 | 中国医学科学院阜外医院 | Optical fiber type CO2、O2Concentration rapid acquisition probe |
| CN111208601A (en) * | 2020-03-30 | 2020-05-29 | 东北石油大学 | Polarization filter for simultaneously filtering orthogonally polarized light at communication wavelength |
| CN111208601B (en) * | 2020-03-30 | 2022-03-25 | 东北石油大学 | Polarization filter for simultaneously filtering orthogonally polarized light at communication wavelength |
| CN112284567B (en) * | 2020-10-19 | 2021-09-21 | 东北大学 | Cascade soliton self-frequency-shift all-fiber sensing system and method for measuring sea water temperature and salt |
| CN112284567A (en) * | 2020-10-19 | 2021-01-29 | 东北大学 | Cascade soliton self-frequency-shift all-fiber sensing system and method for measuring sea water temperature and salt |
| CN114136919A (en) * | 2021-11-30 | 2022-03-04 | 哈尔滨理工大学 | Near-infrared band based dual-peak PCF humidity and stress dual-parameter sensing system |
| CN114544542A (en) * | 2021-11-30 | 2022-05-27 | 哈尔滨理工大学 | Near-infrared waveband based double-peak PCF magnetic field and stress double-parameter sensing system |
| CN114136919B (en) * | 2021-11-30 | 2024-03-15 | 哈尔滨理工大学 | Double-parameter sensing system based on near-infrared band double-peak PCF humidity and stress |
| CN113916838A (en) * | 2021-12-14 | 2022-01-11 | 山东省科学院海洋仪器仪表研究所 | Seawater temperature and salt sensor based on double resonance effect, and measuring system and method |
| CN113916838B (en) * | 2021-12-14 | 2022-03-01 | 山东省科学院海洋仪器仪表研究所 | Seawater temperature and salt sensor based on double resonance effect, and measuring system and method |
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