CN108872155A - A kind of preparation method of magneto-optic optical fiber primary surface Air plasma mass sensor - Google Patents
A kind of preparation method of magneto-optic optical fiber primary surface Air plasma mass sensor Download PDFInfo
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- CN108872155A CN108872155A CN201810405681.8A CN201810405681A CN108872155A CN 108872155 A CN108872155 A CN 108872155A CN 201810405681 A CN201810405681 A CN 201810405681A CN 108872155 A CN108872155 A CN 108872155A
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- 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
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
- G01N21/553—Attenuated total reflection and using surface plasmons
- G01N21/554—Attenuated total reflection and using surface plasmons detecting the surface plasmon resonance of nanostructured metals, e.g. localised surface plasmon resonance
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Abstract
The present invention discloses a kind of preparation method of magneto-optic optical fiber primary surface Air plasma mass sensor.The sensor includes optical-fiber laser, magneto-optic fiber unit, surface plasma resonance sensing unit, photoelectric conversion detector.Wherein magneto-optic optical fiber and surface plasma resonance unit are cores of the present invention.In magneto-optic fiber unit, optical fiber is wound with energization solenoid, forms controlling magnetic field by adjusting electric current.In surface plasma resonance sensing unit, remove optic fibre plastics layer, in the symmetrical plating silverskin of optical fiber wicking surface and organic induction medium layer, organic induction medium layer will absorb target substance (such as gas or biochemical molecule) and act on target substance, change dielectric layer optical property, signal shows output intensity and phase offset by optical fiber other end photoelectric conversion.The present invention has the advantages that compact-sized, at low cost, sensitivity and stability height, formant are narrow.
Description
Technical field
The present invention relates to surface plasma sensor preparation technical fields, more particularly, to magneto-optic glass fiber primary surface etc.
The preparation method of ion sensor system.
Background technique
Environment in recent years pollution has become a problem very serious in world wide.Many pollutants such as CO, NO,
The automobile inner airs hazard of contaminant such as benzene and its homologous substance people's health.Automobile air quality sensor is mainly at present
The SnO reacted by electrochemistry of solids based on ceramics2、ZrO2Chemical sensor.But this sensor has muting sensitivity
And the disadvantages of selective, and the biochemical molecule in air cannot be detected.In addition, the integrated level of chemical sensor compared with
Low, most of is separator, and each section is required to individual power supply and the operation of signal analyzer device, to make to sense
Systems bulky.Therefore it improves the integrated level of sensor and expands the development trend that detection range is air quality sensor.
Compared with chemical sensor, optical sensor especially SPR sensorgram is the electron density on metal and dielectric interface
Resonant excitation, sensitivity with higher is widely used in biomedical and biochemical analysis.With it
He compares the sensor of type, and SPR sensorgram head provides very high sensitivity, and multiple quick response system;Furthermore SPR is passed
It is smaller to feel region area, and is widely used, in addition to common COx, NOx, SOx exhaust gas can also be detected in air
Almost all of biochemical molecular, such as cell virus.These sensors are able to detect minimum presence of a variety of materials in concentration
Rate is to every liter of picomole.
Spr sensor is by matrix surface to the sensitive realization of predetermined substance.Matrix surface is coated with metallic film (such as silver
Or gold).Sensitive layer is to be bonded in film surface by covalent bond such as the complementary antigen of molecular layer.Film can with predefine
Chemistry, biochemistry or biological substance interaction.When SPR sensor is exposed on the sample comprising target substance,
Matrix is attached to sensitive layer and changes the effective refractive index of sensor surface.By observing SPR sensor surface optical characteristics
Variation complete target substance detection.
However general spr sensor is the Kretschmann of the mechanical rotation incident angle based on glass prism
Scanning mode or the spectral wavelength scanning mode of output end obtain SPR（See Fig. 1）.These designs are very heavy, are not suitable for
Remote sensing application in danger zone.And optical fiber, especially magneto-optic optical fiber have simple, flexible, miniaturization and magneto-optical property biography
Sense and remote sensing capabilities, therefore may replace the glass prism or spectral scan mode of SPR.Optical fiber SPR sensor has structure tight
It gathers, is low in cost, the advantage high without tag sensor, sensitivity and stability, formant is narrow can be achieved.
The invention continuously adjusts electrical current and generates continuous variable magnetic by winding energization solenoid in magneto-optic fiber unit
, optical signal generates a series of continuous Faraday rotation angles under the magnetic field, when the angle is identical with SPR excitation angle
When, the peak SPR is excited, different intensity and phase position are generated, so as to detect the concentration and kind of SPR superficial objects substance
Class.The invention is avoided using traditional prism scanning and spectral scan, and integrated level is high, and sensitivity is strong, easy to operate.
Summary of the invention
Continuous Faraday rotation under controlling magnetic field in magneto-optic glass fiber is utilized the purpose of the present invention is to provide a kind of
The method that angle excites the air quality sensor at the peak SPR.
To achieve the above object, the present invention can take following technical proposals：
1）Prepare magneto-optic fiber unit：After single mode heavy metal is connected against magnetic magneto-optic optical fiber with optical fiber laser, optical signal is by coupling
It closes and enters the transmission of magneto-optic optical fiber, energization solenoid is added outside magneto-optic fiber section, size of current is continuously adjusted, makes signal in magneto-optic
Fiber section is generated a series of continuous Faraday rotation angles by the excitation of variation magnetic field.2）Prepare surface plasma resonance biography
Feel unit：With fiber core part is exposed after etch peeling optical fibre plastic outer layer, length is 0.2-0.8 millimeters, right after polishing
Claim metal lining（Gold or silver）Film, film thickness is 10-60 nanometers, in its coating surface organic media after forming metal film
10-20 nanometers of layer.3）Magnetic fiber unit and surface plasma sensing unit are welded into after one section of complete optical fiber and laser
And photoelectric detector connects into sensor with optical fiber.
The described magneto-optic glass base SPR organic dielectric layer according to actual needs can designed, designed, it is convenient and easy.
Present invention firstly provides the imaginations that SPR air quality sensor is constructed on magneto-optic fiber basis, by magneto-optic
Energization solenoid is wound on optical fiber, is continuously adjusted electrical current and is generated continuous variable magnetic field, optical signal generates one under the magnetic field
Serial continuous Faraday rotation angle excites the peak SPR, generates different intensity when the angle is identical with SPR excitation angle
And phase position, so as to detect the concentration and type of SPR organic dielectric layer superficial objects substance.The invention is avoided using biography
The prism of system scans and spectral scan, and integrated level is high, and sensitivity is strong, easy to operate.
Detailed description of the invention
Fig. 1 is the design diagram of traditional fiber SPR sensorgram system.
Fig. 2 is the design diagram of magneto-optic optical fiber sensor-based system in the embodiment of the present invention 1.
Fig. 3 is magneto-optic fiber unit schematic diagram in the embodiment of the present invention 1.
Fig. 4 is optical fiber surface plasmon sensing unit schematic diagram in the embodiment of the present invention 1.
Fig. 5 is the Faraday rotation angle of optical fiber surface plasmon sensor-based system and SPR excitation in the embodiment of the present invention 2
Corresponding relationship between angle and excitation characteristic peak.
Fig. 6 is the Faraday rotation angle of optical fiber surface plasmon sensor-based system and organic Jie in the embodiment of the present invention 2
The corresponding relationship of matter layer light refractive index.
Fig. 7 is the structure figures of optical fiber surface plasmon sensor-based system in the embodiment of the present invention 2.
Specific embodiment
Below by specific embodiment, the present invention will be further described.
Embodiment 1
1）Prepare magneto-optic fiber unit：After single mode heavy metal is connected against magnetic magneto-optic optical fiber with optical fiber laser, optical signal is by coupling
It closes and enters the transmission of magneto-optic optical fiber, energization solenoid is added outside magneto-optic fiber section, size of current is continuously adjusted, makes signal in magneto-optic
Fiber section is excited the Faraday rotation angle for generating different angle by variation magnetic field.2）Prepare surface plasma resonance sensing
Unit：With fiber core part is exposed after etch peeling optical fibre plastic outer layer, length is 0.2-0.8 millimeters, plating after polishing
Metal（Gold or silver）Film, film thickness is 10-60 nanometers, in its coating surface organic dielectric layer 10- after forming metal film
20 nanometers.3）Magnetic fiber unit and surface plasma sensing unit are welded into after one section of complete optical fiber and laser and light
Photodetector connects into sensor with optical fiber.
Fig. 2 is the design drawing of magneto-optic optical fiber sensor-based system in the embodiment of the present invention 1, and wherein magneto-optic optical fiber is from a huge sum of money
Belong to oxide antimagnetic glass and takes out single mode magneto-optic optical fiber made of system.
Fig. 3 is the structural schematic diagram and pictorial diagram of the magneto-optic glass fiber in the embodiment of the present invention 1.
Fig. 4 is the structural schematic diagram of the SPR sensorgram unit in the embodiment of the present invention 1.
Embodiment 2
1）Prepare magneto-optic fiber unit：After single mode heavy metal is connected against magnetic magneto-optic optical fiber with optical fiber laser, optical signal is by coupling
It closes and enters the transmission of magneto-optic optical fiber, energization solenoid is added outside magneto-optic fiber section, size of current is continuously adjusted, makes signal in magneto-optic
Fiber section is excited the Faraday rotation angle for generating different angle by variation magnetic field.2）Prepare surface plasma resonance sensing
Unit：With fiber core part is exposed after etch peeling optical fibre plastic outer layer, length is 0.2-0.8 millimeters, plating after polishing
Metal（Gold or silver）Film, film thickness is 10-60 nanometers, in its coating surface organic dielectric layer 10- after forming metal film
20 nanometers.3）Magnetic fiber unit and surface plasma sensing unit are welded into after complete optical fiber and laser and photoelectricity
Detector connects into sensor with optical fiber.
Fig. 5 is the Faraday rotation angle of optical fiber surface plasmon sensor-based system and SPR excitation in the embodiment of the present invention 2
Corresponding relationship between angle and excitation characteristic peak.It can be seen that consecutive variations magnetic caused by the electric current of consecutive variations
, make magneto-optical signal that a series of Faraday rotation occur, wherein magnetic flux changes with time and nonlinear dependence is presented in Fig. 5 a
System, according to the relationship at Faraday rotation angle and magnetic flux, can be changed into the relationship at the Faraday rotation angle and time in Fig. 5 b,
When Faraday rotation angle is consistent with SPR excitation angle, SPR effect is excited, the SPR characteristic peak in Fig. 5 c occurs, to show
The relationship of SPR output intensity and Faraday rotation angle.
Fig. 6 is the Faraday rotation angle of optical fiber surface plasmon sensor-based system and organic Jie in the embodiment of the present invention 2
The corresponding relationship of matter layer light refractive index.It can be seen that with organic dielectric layer and target substance absorption, surface refractive index from
N1 to n2 etc. changes.Corresponding SPR excites angle to change also with the variation of refractive index.Another aspect faraday angle
It spends the change due to magnetic field and a series of rotation has occurred, Fig. 6 illustrates Faraday rotation angle and dielectric layer optical refraction
Corresponding relationship between rate.
Fig. 7 is the structure figures of optical fiber surface plasmon sensor-based system in the embodiment of the present invention 2.The sensor-based system includes swashing
Light, magneto-optic fiber unit, SPR sensorgram unit and photoelectric detecting system.
Claims (2)
1. a kind of preparation method of magneto-optic optical fiber primary surface Air plasma mass sensor, it is characterised in that：1）Prepare magneto-optic
Fiber unit：After single mode heavy metal is connected against magnetic magneto-optic optical fiber with optical fiber laser, optical signal is coupled into magneto-optic optical fiber
Transmission adds energization solenoid outside magneto-optic fiber section, continuously adjusts size of current, become signal in magneto-optic fiber section
The excitation of magnetizing field generates the Faraday rotation angle of different angle；
2）Prepare surface plasma resonance sensing unit：With after etch peeling optical fibre plastic outer layer expose fiber core part,
Length is 0.2-0.8 millimeters, metal lining after polishing（Gold or silver）Film, film thickness is 10-60 nanometers, to forming metal film
Afterwards at 10-20 nanometers of its coating surface organic dielectric layer；
3）By magnetic fiber unit and surface plasma sensing unit be welded into after one section of complete optical fiber and laser and photoelectricity inspection
It surveys device and connects into sensor with optical fiber.
2. the organic media layer material foundation in the magneto-optic optical fiber primary surface plasma sensing unit according to claim 1
Practical sensing needs voluntarily to select, convenient and easy.
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| CN201810405681.8A CN108872155A (en) | 2018-04-29 | 2018-04-29 | A kind of preparation method of magneto-optic optical fiber primary surface Air plasma mass sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176240A (en) * | 2021-05-11 | 2021-07-27 | 河南工业大学 | Preparation method of magneto-optical double-control optical fiber SPR sensor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011114314A1 (en) * | 2010-03-19 | 2011-09-22 | Politecnico Di Torino | Optical fibre made with magneto-optical glasses, surface plasmon resonance sensor based on said optical fibre and method for determining chemical substances present in the air |
| CN104406939A (en) * | 2014-09-28 | 2015-03-11 | 山东大学 | Plastic fiber surface plasma sensor based on bimetallic grating and application thereof |
-
2018
- 2018-04-29 CN CN201810405681.8A patent/CN108872155A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011114314A1 (en) * | 2010-03-19 | 2011-09-22 | Politecnico Di Torino | Optical fibre made with magneto-optical glasses, surface plasmon resonance sensor based on said optical fibre and method for determining chemical substances present in the air |
| CN104406939A (en) * | 2014-09-28 | 2015-03-11 | 山东大学 | Plastic fiber surface plasma sensor based on bimetallic grating and application thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176240A (en) * | 2021-05-11 | 2021-07-27 | 河南工业大学 | Preparation method of magneto-optical double-control optical fiber SPR sensor |
| CN113176240B (en) * | 2021-05-11 | 2023-01-24 | 河南工业大学 | Preparation method of magneto-optical double-control optical fiber SPR sensor |
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Application publication date: 20181123 |