CN103048269A - Relative humidity sensor of optical fiber bundle modified by inverse opal film and preparation method thereof - Google Patents
Relative humidity sensor of optical fiber bundle modified by inverse opal film and preparation method thereof Download PDFInfo
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- CN103048269A CN103048269A CN2012105547330A CN201210554733A CN103048269A CN 103048269 A CN103048269 A CN 103048269A CN 2012105547330 A CN2012105547330 A CN 2012105547330A CN 201210554733 A CN201210554733 A CN 201210554733A CN 103048269 A CN103048269 A CN 103048269A
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Abstract
The invention discloses a relative humidity sensor of an optical fiber bundle modified by an inverse opal film and a preparation method thereof. The main structure of the relative humidity sensor comprises the optical fiber bundle and the inverse opal film, wherein one end of the optical fiber bundle is free, and one end of the optical fiber bundle is banded by a metal sleeve; and the inverse opal film is deposited at the end face of the optical banded fiber bundle. The method comprises the follow main manufacture steps: selecting optical fibers, manufacturing of the optical fiber bundle of a corresponding size according to the use demand, and grinding and polishing the end face of one banded end of the optical fiber bundle to be smooth; vertically depositing sol gel and cooperating with a self-assembly method to manufacture a layer of composite film on the end face of the optical fiber bundle, high-temperature sintering the composite film to convert the composite film into the inverse opal film, and protecting the inverse opal film with a plastic cap; and manufacturing the free end of the optical fiber bundle into a general optical fiber connector. The relative humidity sensor is an all-optical working device, uses the standard optical fiber connector, and can be connected with the current optical fiber communication network to realize an all-optical sensing network. Aiming at different application backgrounds, the working waveband can be selected, and the applicability is strong.
Description
Technical field
The present invention relates to a kind of microstructured optical fibers bundle senser element, particularly relate to device of fibre-optical microstructure and preparation method thereof.
Background technology
The bandgap structure of photonic crystal is applied to optical fiber, has formed photonic crystal fiber (Photonic Crystal Fiber, PCF), claim again microstructured optical fibers.Adopt ultraviolet sidelights on technology or CO
2The heat shock technology can be write photonic crystal fiber grating processed in PCF.Microstructure optical fiber grating has abundant structural and optical characteristic.Change micropore arrangement, size and dutycycle in the optical fiber, perhaps medium is written into micropore, all can change the optical property of photonic crystal fiber and grating thereof, greatly changed the performance of fibre-optical microstructure.But its cost of manufacture is high, uses with docking of ordinary optic fibre also to have a lot of problems.
Make the photonic crystal of optics and near-infrared band, chemical method demonstrates larger superiority, being aided with collosol and gel (Sol-gel) technology when wherein utilizing the colloidal solid self assembly, to prepare counter opal (Inverse Opal, IO) structural membrane be a kind of novelty, easy reliable method: synthetic monodispersed PMMA or polystyrene (PS) colloid micro ball; Utilize the Sol-gel technology, the space at microballoon when microballoon is assembled forms gel, forms three-dimensional order at different matrixes and piles up; Sintering is removed PMMA or PS, and gel is converted into corresponding oxide simultaneously, obtains at last the IO of different oxide materials.Method is simple for the collaborative particle self assembly of Sol-gel, and the precursor range of choice is wide, is convenient to form the IO of unlike material, and PMMA or PS spheric grain are easily synthetic, and size is controlled, and cost of manufacture is low.
{ direction of 111} crystal face has a forbidden photon band perpendicular to the IO film, the centre wavelength in forbidden band is relevant with IO relative humidity on every side, therefore but the position of forbidden band centre wavelength and the angle of incident light also have relation, the accurate detection of forbidden band centre wavelength are become the IO film and can be applied to one of important technology of sensing.
Summary of the invention
The present invention namely is based on the above present situation and carries out, and purpose is to make a kind of easy, safe and reliable, the fiber optic sensing device that energy and present communication optical fiber network directly mate.Utilize IO film forbidden photon band to the response of surrounding environment relative humidity, by same optical fiber the IO film is transmitted and received light signal, for the angle of fixed fiber emergent light to the formation of IO film, employing prepares the IO film at fiber end face, so that tight fixing the linking together of optical fiber and IO film, avoid improving the reliability of measuring because incident angle changes the measured deviation of bringing.In order to improve yield rate, reduce production costs, improve precision, design prepares the IO film at the fibre bundle end face.The other end by optical fiber transmits and receives light signal, can obtain real-time probe rh value on every side.
In order to realize the foregoing invention purpose, fibre bundle relative humidity sensor of the present invention adopts following technical scheme:
Inverse opal film is modified the relative humidity sensor of fibre bundle, comprises inverse opal film, metal sleeve, fibre bundle and plastics tin hat; Wherein, an end of metal sleeve banding fibre bundle, and the end face of the end face of metal sleeve and fibre bundle is coplanar; Deposit inverse opal film at described end face, thin film planar is vertical with the axial direction of optical fiber; Plastics protection cap is on metal sleeve and film, and the other end of described fibre bundle is the universal optical fibre connector.
The preparation method of fibre bundle relative humidity sensor of the present invention adopts following processing step:
A) intercept a branch of optical fiber, an end of fibre bundle is removed the coat of 1-2cm, inserts in the metal sleeve and fills closely knit with glue, make the xsect of the xsect of fibre bundle end face and metal sleeve end face coplanar, simultaneously perpendicular to fiber axis to, and grind smoothly, form the fibre bundle end face; The other end of fibre bundle is made into the universal optical fibre connector;
B) the fibre bundle end face of previous step milled is used respectively acetone, alcohol and deionized water ultrasonic cleaning 10 minutes, then dried up with nitrogen; Again with plasma cleaner to fibre bundle end face processing 5 minutes;
C) the fibre bundle end face after will processing is fixed with the anchor clamps of customization, and puts into container;
D) configuration SiO
2Perhaps TiO
2Precursor solution, SiO
2The precursor solution mass ratio be-HCl of the TEOS:0.1M/L of 98wt%: absolute ethyl alcohol=1:1:1.5; TiO
2The precursor aqueous solution be the TiBALDH of 10wt%, stir one hour for subsequent use;
E) the colloid micro ball solution of configuration PS or PMMA material, microsphere diameter deviation/mean diameter * 100%＜0.2%, concentration of volume percent are 0.1% ~ 0.5%, solvent is deionized water;
F) with d) in the precursor solution of configuration add e to) in the colloid micro ball solution of configuration, the precursor solution percent by volume of interpolation is e) in 10 times of colloid micro ball liquor capacity number percent, namely 1% ~ 5%;
G) solution that configures in the step f) is poured in the container of step c), and flooded the fibre bundle end face, keep simultaneously the vertical liquid level of fibre bundle end face;
H) container in the step g) is placed in the thermostatic drying chamber, under the condition of certain temperature, humidity, adopt the collaborative self-assembly method of vertical deposition Sol-gel to apply colloid crystal film at the fibre bundle end face, be filled with the precursor gel in the gap of colloidal crystal simultaneously;
I) with step h) in carry out at a certain temperature sintering at the film of fibre bundle end face preparation, remove PS or PMMA colloidal crystal, then cover with the plastics tin hat, namely finish the making of fibre bundle relative humidity sensor.
The present invention adopts the method for the collaborative microballoon self assembly of vertical deposition Sol-gel, prepare orderly IO film at the fibre bundle end face, the IO film for preparing is combined with fiber end face closely, good mechanical property, difficult drop-off, the thickness of IO film is controlled simultaneously, for different application scenarios, selection thickness that can be flexible arrives good Effect on Detecting.The material of IO film can be selected equally flexibly, the model of optical fiber, and core diameters etc. can freely be selected, and therefore applicability of the present invention is strong.
The humidity sensor principle is when inverse opal film surrounding environment relative humidity variations, on the direction perpendicular to thin film planar, film dialogue reflection of light rate peak wavelength has skew, reflectance peak wavelength and humidity have one-to-one relationship, can calculate relative humidity by the reflectance peak wavelength.The accuracy of detection of relative humidity is relevant with the optical fiber model with the IO film of sensing range and selection, reasonably selects, and the sensing range of same fibre bundle sensor can be between 5%RH-95%RH, and precision can reach 2%RH even higher.
Description of drawings
Fig. 1 is the structural representation of the relative humidity sensor of the film modified fibre bundle of IO of the present invention, the 1-1:IO film; 1-2: universal optical fibre connector; 1-3: fibre bundle; 1-4: metal sleeve; 1-5: plastics tin hat.
Fig. 2 is that the present invention is at the preparation facilities schematic diagram of fibre bundle end face self assembly composite membrane, 2-1: glass container; 2-2: the colloid micro ball solution that adds the certain proportion precursor liquid; 2-3: the fibre bundle that metal sleeve is waled; 2-4: thermostatic drying chamber.
Fig. 3 is the schematic diagram of colloidal crystal crystallization and gel-filled process among the present invention, 3-1: fibre bundle end face; 3-2: end face resistance; 3-3: solution planum semilunatum; 3-4: microballoon gravity; 3-5: microballoon cohesion; 3-6: hydrodynamic shear; 3-7: the gel that the precursor hydrolytie polycondensation forms; 3-8: colloid micro ball.
Fig. 4 be among Fig. 1 the fibre bundle relative humidity sensor under same temperature 25 degree to the reflected light spectrogram of different humidity.
Embodiment
Be described in further details below in conjunction with drawings and Examples.
The step that the present embodiment prepares the fibre-optical microstructure device is as follows:
A) a branch of single-mode fiber 1-3 of intercepting, fibre core 9 μ m, covering 125 μ m, the end of fibre bundle 1-3 is removed the approximately coat of 1.5cm, inserts metal sleeve 1-4 interior closely knit with the glue filling, the long 12mm of metallic copper sleeve pipe 1-4, external diameter 10mm, internal diameter 3mm, epoxide-resin glue makes the xsect of the xsect of fibre bundle 1-3 and metal sleeve 1-4 coplanar, simultaneously perpendicular to fiber axis to, and grind smoothly, and roughness is less than 100nm, and c forms fibre bundle end face 3-1; The other end of fibre bundle 1-3 is made into general FC fiber connector 1-2;
B) the fibre bundle end face 3-1 with the previous step milled uses respectively acetone (purity 99.7%), alcohol (purity 99.9%), deionized water (resistivity 18.2M Ω) ultrasonic (40W) to clean 10 minutes, then uses nitrogen (purity 99.7%) to dry up; Again with plasma cleaner to fibre bundle end face processing 5 minutes;
C) the fibre bundle end face 3-1 after will processing fixes with the container 2-1 of customization;
D) configuration SiO
2Precursor solution, SiO
2Precursor solution in each material mass be respectively: TEOS(98wt%)=1g, the HCl of 0.1M/L=1g, EtOH(100%)=1.5g, stir after mixing one hour for subsequent use;
E) configuration polystyrene (PS) colloidal solution, 30ml, the diameter of colloid micro ball 3-8 are 690nm, and microsphere diameter deviation ratio 0.2%, concentration of volume percent are 0.1%, and solvent is deionized water;
F) with d) in the precursor solution of configuration add e to) in the colloid micro ball solution of configuration, form solution 2-2, the percent by volume 1% of interpolation, i.e. 0.3ml;
G) the solution 2-2 that configures in the step f) is poured in the container 2-1 that is fixed with fibre bundle 2-3 in the step c), and flood fibre bundle end face 3-1, keep simultaneously the vertical liquid level 2-2 of fibre bundle end face 3-1;
H) the container 2-1 in the step g) is placed 2-4 in the thermostatic drying chamber, under the condition of constant temperature 50 degree, 70%-90% relative humidity, adopt the collaborative self-assembly method of vertical deposition Sol-gel to apply colloid crystal film at fibre bundle end face 3-1, be filled with precursor gel 3-7 in the gap of colloidal crystal simultaneously;
I) with step h) at the film of fibre bundle end face 3-1 preparation; under 500 degree, carry out sintering 20 minutes, remove PS or PMMA colloidal crystal, obtain IO film 1-1; then cover fibre bundle end face 3-1 with plastics tin hat 1-5, namely finish the making of fibre bundle relative humidity sensor.
Claims (4)
1. inverse opal film is modified the relative humidity sensor of fibre bundle, comprises inverse opal film, metal sleeve, fibre bundle and plastics tin hat; It is characterized in that, an end of metal sleeve banding fibre bundle, and the end face of the end face of metal sleeve and fibre bundle is coplanar; Deposit inverse opal film at described end face, thin film planar is vertical with the axial direction of optical fiber; Plastics protection cap is on metal sleeve and film, and the other end of described fibre bundle is the universal optical fibre connector.
2. inverse opal film according to claim 1 is modified the relative humidity sensor of fibre bundle, and it is characterized in that: inverse opal materials derived comprises SiO
2Or TiO
2Described fibre bundle adopts solid non-plastic optical fiber, and fiber lengths is greater than 10cm; Described universal optical fibre connector is FC or SMA905.
3. method for preparing relative humidity sensor spare as claimed in claim 1, its step of preparation process is as follows:
A) intercept a branch of optical fiber, an end of fibre bundle is removed the coat of 1-2cm, inserts in the metal sleeve and fills closely knit with glue, make the xsect of the xsect of fibre bundle end face and metal sleeve end face coplanar, simultaneously perpendicular to fiber axis to, and grind smoothly, form the fibre bundle end face; The other end of fibre bundle is made into the universal optical fibre connector;
B) the fibre bundle end face of previous step milled is used respectively acetone, alcohol and deionized water ultrasonic cleaning 10 minutes, then dried up with nitrogen; Again with plasma cleaner to fibre bundle end face processing 5 minutes;
C) the fibre bundle end face after will processing is fixed with the anchor clamps of customization, and puts into container;
D) configuration SiO
2Perhaps TiO
2Precursor solution, SiO
2The precursor solution mass ratio be-HCl of the TEOS:0.1M/L of 98wt%: absolute ethyl alcohol=1:1:1.5; TiO
2The precursor aqueous solution be the TiBALDH of 10wt%, stir one hour for subsequent use;
E) the colloid micro ball solution of configuration PS or PMMA material, microsphere diameter deviation/mean diameter * 100%＜0.2%, concentration of volume percent are 0.1% ~ 0.5%, solvent is deionized water;
F) precursor solution that configures in the step d) is added in the colloid micro ball solution that configures in the step e), the precursor solution percent by volume of interpolation is e) in 10 times of colloid micro ball liquor capacity number percent, namely 1% ~ 5%;
G) solution that configures in the step f) is poured in the container of step c), and flooded the fibre bundle end face, keep simultaneously the vertical liquid level of fibre bundle end face;
H) container in the step g) is placed in the thermostatic drying chamber, under the condition of certain temperature, humidity, adopt the collaborative self-assembly method of vertical deposition Sol-gel to apply colloid crystal film at the fibre bundle end face, be filled with the precursor gel in the gap of colloidal crystal simultaneously;
I) with step h) in carry out at a certain temperature sintering at the film of fibre bundle end face preparation, remove PS or PMMA colloidal crystal, then cover with the plastics tin hat, namely finish the making of fibre bundle relative humidity sensor.
4. preparation method according to claim 3, it is characterized in that: the diameter of described colloid micro ball is 100nm to 1000nm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784196A (en) * | 2016-05-20 | 2016-07-20 | 中国电子科技集团公司第四十九研究所 | Reflection type temperature sensing probe based on double-layered photonic crystal thin film |
| CN106006725A (en) * | 2016-05-17 | 2016-10-12 | 东华大学 | Method for constructing inverse opal structure on surface of carbon rod |
| CN110137376A (en) * | 2019-05-30 | 2019-08-16 | 京东方科技集团股份有限公司 | A kind of display panel and preparation method thereof |
| WO2019162554A1 (en) * | 2018-02-23 | 2019-08-29 | Consejo Superior De Investigaciones Científicas | Dew formation detector and use of same |
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| CN1908634A (en) * | 2006-08-17 | 2007-02-07 | 中国船舶重工集团公司第七二五研究所 | Preparation of optical fiber humidity sensor sensing membrane |
| CN101776595A (en) * | 2010-01-29 | 2010-07-14 | 武汉理工大学 | Manufacture method of optical fiber humidity sensor based on Fabry-Perot interference |
| CN102053302A (en) * | 2010-12-14 | 2011-05-11 | 南京师范大学 | Colloidal crystal-modified optical fiber microstructural device and manufacturing method thereof |
| CN102226847A (en) * | 2011-06-13 | 2011-10-26 | 南京师范大学 | Microstructure fiber with fiber core modified by inverse opal and preparation method thereof |
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2012
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| JPS63311147A (en) * | 1987-06-15 | 1988-12-19 | Tokyo Electric Power Co Inc:The | Optical fiber type humidity sensor |
| CN1908634A (en) * | 2006-08-17 | 2007-02-07 | 中国船舶重工集团公司第七二五研究所 | Preparation of optical fiber humidity sensor sensing membrane |
| CN101776595A (en) * | 2010-01-29 | 2010-07-14 | 武汉理工大学 | Manufacture method of optical fiber humidity sensor based on Fabry-Perot interference |
| CN102053302A (en) * | 2010-12-14 | 2011-05-11 | 南京师范大学 | Colloidal crystal-modified optical fiber microstructural device and manufacturing method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106006725A (en) * | 2016-05-17 | 2016-10-12 | 东华大学 | Method for constructing inverse opal structure on surface of carbon rod |
| CN105784196A (en) * | 2016-05-20 | 2016-07-20 | 中国电子科技集团公司第四十九研究所 | Reflection type temperature sensing probe based on double-layered photonic crystal thin film |
| CN105784196B (en) * | 2016-05-20 | 2018-07-13 | 中国电子科技集团公司第四十九研究所 | Reflective temperature sensing probe based on the double-deck photon crystal film |
| WO2019162554A1 (en) * | 2018-02-23 | 2019-08-29 | Consejo Superior De Investigaciones Científicas | Dew formation detector and use of same |
| ES2723799A1 (en) * | 2018-02-23 | 2019-09-02 | Consejo Superior Investigacion | DETECTOR OF TRAINING AND USE OF THE SAME (Machine-translation by Google Translate, not legally binding) |
| CN110137376A (en) * | 2019-05-30 | 2019-08-16 | 京东方科技集团股份有限公司 | A kind of display panel and preparation method thereof |
| CN110137376B (en) * | 2019-05-30 | 2021-09-14 | 京东方科技集团股份有限公司 | Display panel and preparation method thereof |
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Application publication date: 20130417 |