CN207703718U - A kind of twin-core fiber transmission-type binary channels spr sensor - Google Patents
A kind of twin-core fiber transmission-type binary channels spr sensor Download PDFInfo
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- CN207703718U CN207703718U CN201720924712.1U CN201720924712U CN207703718U CN 207703718 U CN207703718 U CN 207703718U CN 201720924712 U CN201720924712 U CN 201720924712U CN 207703718 U CN207703718 U CN 207703718U
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Abstract
The utility model proposes a kind of twin-core fiber transmission-type binary channels spr sensor, including super continuum source 1, coupling note electro-optical device 2, twin-core fiber 3, two cone angle SPR sensorgram probes 4, multimode fibre 5, spectrometer 6, syringe pump 7, reaction tank 8, waste liquid pool 9, computers 10；Super continuum source light notes electro-optical device by coupling and injects one fibre core of twin-core fiber, it is totally reflected twice at SPR microsensor probes two cone angles structure inclined-plane symmetrical above and below, surface plasma body resonant vibration occurs simultaneously, reflected light enters horizontal transport in multimode fibre, and is sent into spectrometer collection reflection loss spectrum；The different fibre cores that electro-optical device replaces twin-core fiber are noted by coupling, the utility model can carry out two kinds of analytes to mixture in same sensing unit and detect simultaneously；Two-way reference measure interferes caused by effectively making up interference and non-specific binding, Physical Absorption of background refractive index etc..
Description
Technical field
The utility model belongs to fibre optical sensor field, more particularly to a kind of twin-core fiber transmission-type binary channels SPR sensorgram
Device.
Background technology
Surface plasma body resonant vibration optical phenomena extensive application in terms of biomedical and environment measuring.SPR sensorgram
Platform is typically based on Kretschmann structures, is covered in prism surface by super thin metal (commonly gold or silver) layer and is formed.
The characteristic of its reflectance spectrum is highly sensitive to the refractive index for closing on metal layer lateral media, you can according to spectrum change situation
Testing medium on the outside of metal layer is sensed.Need fluid handling system to sensing probe compared to prism-type spr sensor
Sample presentation, optical-fiber type spr sensor have miniaturization, the advantage that can be immersed directly in solution to be measured, be SPR technique development and
The natural extension of system micromation.
With the diversification of object to be measured parameter type and characteristic so that conventional single-channel SPR sensorgram mechanism gradual nothing
Method meets actually detected needs.Simultaneously in order to make up background refractive index interference, to specific binding carry out effectively measure and
The spr sensor of temperature self-reference, multichannel is urgently developed.It develops and has high integration, high throughput, multidigit point while measurement
New distribution type spr sensor is just becoming the focus of people's growing interest.Current reported multichannel optical fiber spr sensor
It is based on wavelength-division multiplex technique more, multiple positions with sensing function is usually made on optical fiber, utilize each sensing position
Resonant wavelength is inconsistent, is measured while realizing multiple spot in same detection structure.Yoon-Chang Kim(Optics
Letters, 2005,30 (17)：Double channel optical fiber spr sensor 2218-2220) etc. is devised, the same probe can be used
Two sides detect two independent spr signals；Yinquan Yuan (Sensors ＆Actuators B Chemical,
2012,161 (1)：Golden film 269-273) etc. is coated with and silverskin configures two surfaces using the different location in an optical fiber respectively
Plasma wave sensor, this discrete type sensing arrangement theoretically may be implemented to detect while two parameters and site.But
Since resonance range adjusts more difficulty, defect will appear for particular detection channel；Wei Peng (Optics Letters,
2005,30 (22)：The distribution type fiber-optic SPR for adjusting SPR working ranges all the way 2988-2990) etc. is realized by organic hybrid films
Sensor leads to the reduction of sensitivity however, extra play reduces the energy of evanescent wave and the interaction of target membrane system. MD
Baiad (Optics Letters, 2015,40 (1)：Multichannel SPR 115-118) etc. is made using grating in simple optical fiber to pass
Sensor, but the spr sensor sensitivity based on grating is low.
Micro-structure multi-core optical fiber is the special fiber that more fibre cores are arranged in 125 microns of covering space, multi-core optical fiber
The optic communications such as optical fiber laser, fiber amplifier, integrated form fibre optic interferometer, temperature or strain gauge and sensing neck are realized
A variety of optical elements in domain.The utility model provides a kind of twin-core fiber transmission-type binary channels spr sensor, twin-core fiber it is every
A fibre core realizes that each fibre core corresponds to sensing unit as a sensitive zones by the note light and reception light to each fibre core
Independent multichannel SPR sensorgram.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of twin-core fiber transmission-type binary channels spr sensor,
Twin-core fiber is processed into the cone angle structure of two different angles by optical fiber lapping technology by twin-core fiber end face, and multimode light is used in combination
Fibre is milled into symmetrical structure, the reflected light after welding for receiving twin-core fiber, and the double of time-division multiplex technology are utilized to be formed
Channel fiber spr sensor.
In order to achieve the above objectives, the utility model provides the following technical solutions：A kind of twin-core fiber transmission-type binary channels SPR
Sensor, including super continuum source 1, coupling note electro-optical device 2, twin-core fiber 3, two cone angle SPR sensorgram probes 4, multimode fibre
5, spectrometer 6, syringe pump 7, reaction tank 8, waste liquid pool 9, computer 10；After super continuum source light injects single mode optical fiber, pass through
Coupling note electro-optical device injects one fibre core of twin-core fiber, two at SPR microsensor probes two cone angles structure inclined-plane symmetrical above and below
Secondary total reflection, while surface plasma body resonant vibration occurs, reflected light enters horizontal transport in multimode fibre, and is sent into spectrometer and adopts
Computer disposal is sent after collection reflection loss spectrum；Electro-optical device, which is noted, by coupling replaces the different fibre cores of twin-core fiber, it can be achieved that base
In time-multiplexed double channel optical fiber SPR sensorgram.
Further, the super continuum source 1 is the SuperK COMPACT model super continuum sources of NKT companies；
The coupling note electro-optical device 2 loads 10 power microscope eyepieces by thorlabs companies three-dimensional precise fiber coupling frame and forms；Institute
Twin-core fiber 3 is stated, two fibre cores are symmetrically distributed in 125 μm of coverings of same diameter, two 30 μm to 110 μm of fibre core spacing, every
Core diameter is 4 μm to 8 μm, and it is basic mode or a small amount of low-order mode to make 500nm-1000nm wavelength wide range optical transmission modes.
Further, the two cone angle SPR sensorgram probes 4, are connect twin-core fiber 3 and multimode by bare fibre end surface grinding
The same cone angle structure that 5 end of optical fiber is ground into design angle and depth is received, two optical fiber are connected using optical fiber core shift welding,
40nm is coated with to 70nm golden films, optical fiber bevel ground angle on optical taper corner structure inclined-plane 4-1 and 4-2 using plasma sputtering method
Degree is 10 ° to 20 °.
Further, the multimode fibre 5 is step-refraction index or graded index multimode fiber, core diameter 62.5
μm to 110 μm；Spectrometer 6 is AQ6373 types visible spectrometry or wide range compact optical optical fiber spectrograph.
The utility model is related to a kind of twin-core fiber transmission-type binary channels spr sensor, each fibre core of twin-core fiber is made
For a sensitive zones, by note light to each fibre core with receive light, realize that each fibre core corresponds to the independence of sensing unit and leads to more
Road senses.Two kinds of analytes can be carried out in same sensing unit to mixture to detect simultaneously；Two-way reference measure effectively makes up background
Interference caused by the interference of refractive index and non-specific binding, Physical Absorption etc.；Different angle is ground by optical fiber lapping technology
Cone angle structure, you can the adjustment for realizing light source incidence angle, to effectively adjust wavelength wavelength operating range and the sensitivity of sensor；
Time division multiplexing formula multi-channel optical fibre spr sensor can effectively avoid two paddy of wavelength-division multiplex formula it is close when cross jamming caused by resonance
Paddy, which is read, is not allowed, or even resonance paddy consolidation problem.
Description of the drawings
Fig. 1 is twin-core fiber transmission-type binary channels spr sensor working system diagram.
Fig. 2 is two cone angle SPR sensorgram probe structure schematic diagrames.
Fig. 3 is AA ', the corresponding sectional view of BB ' planes in Fig. 2, and wherein Fig. 3 (a) is twin-core fiber sectional view, is corresponded to
AA ' planes；Fig. 3 (b) is step multimode fibre sectional view, corresponds to BB ' planes.
Fig. 4 is the simulation result that two cone angle SPR sensorgram probes two grind that inclined-plane is respectively the response of 13 ° of refraction index solutions
Figure；
Fig. 5 is the simulation result that two cone angle SPR sensorgram probes two grind that inclined-plane is respectively the response of 17 ° of refraction index solutions
Figure.
Specific implementation mode
Below in conjunction with case study on implementation and attached drawing, the utility model is described in further detail, but it is new that this practicality should not be limited with this
The protection domain of type.
As shown in Figure 1, by super continuum source (the Compact single mode white light of NKT companies
Soure it) is injected in the one of fibre core of twin-core fiber by coupling device.Incident light is respectively above and below SPR microsensor probes
It is totally reflected twice at symmetrical two cone angles structure inclined-plane, and surface plasma body resonant vibration occurs.Reflected light enters 125 μm of plastics of core diameter
Horizontal transport in covering step-index multimode fiber, and it is sent into spectrometer collection reflection loss spectrum.It is noted with programmable microscale
The aqueous solution that pump injects glycerine into reaction tank is penetrated, the refraction of various concentration glycerite is demarcated with Abbe refractometer analyzer
Rate is used in combination micro-injection pump to be implanted sequentially micro flow chip, acquires measure spectrum.
4 specific production method of wherein two cone angle SPR sensorgram probe is as shown in Figure 2 and Figure 3, and twin-core fiber end face is cut flat with, folder
In optical fiber lapping system, it is passed through white light simultaneously in two cores, convenient for positioning two fibres of optical fiber by the CCD of grinding system
Core.Twin-core fiber is axially rotated, makes straight line where two fibre cores perpendicular to abrasive disk, pushes optical fiber, makes it with abrasive disk at setting
Angle 1 is counted, is ground with 8000 mesh sand paper.When being ground to projected depth, upper lift optical fiber, in an axial direction by fiber spinning 180
Degree pushes optical fiber to being ground at design angle 2 with abrasive disk, when being ground to projected depth, lifts optical fiber again.With
12000 mesh sand paper polish optical fiber two and grind face 2 hours respectively, ensure that two reflecting slant of twin-core fiber is substantially flat.By 125 μ
M plastic envelope step index optical fibers are milled into the bipyramid corner structure of identical size and shape, and two optical fiber are clamped in polarization-maintaining
In bonding machine, welded when turning to position shown in Fig. 2.The probe being welded is rotated on glass slide, makes cone angle structure diagonal
Face 4-1 is fixed with optical cement at left and right sides of probe afterwards upward vertically, prevents it from rotating.It is visited in cone angle structure with plasma sputtering instrument
Needle side is coated with 50nm golden films on two inclined-planes.Probe is taken out, it is fixed after 180 ° of rotation, it is also plated on two inclined-plane 4-2 of the probe other side
50nm golden films processed.Golden film thickness is coated with probe simultaneously every time by three-dimensional appearance analyzer (zygo newview7200) measurement
Golden film thickness on glass slide ensures.
The fibre core of twin-core fiber is thinner, and is basic mode injection when super continuum source injection, transmits and is just accounted for basic mode
Leading.In the case where only considering basic mode, it is anti-to calculate the P light after the total reflection of SPR sensorgram inclined-plane using matlab softwares
Rate is penetrated, fiber core refractive index takes 1.467, and golden film thickness takes 50nm, two cone angle SPR sensorgram probes two to grind inclined-plane and be respectively
At 13 ° and 17 °, SPR resonance angles are respectively 77 °, 73 °, to the attenuated reflectance spectrum simulation result of different refractivity solution
See Fig. 4 and Fig. 5.As can be seen that twin-core fiber transmission-type binary channels spr sensor has high sensitivity, using different grinding angles
Degree, can adjust SPR resonance spectrum working ranges.Meanwhile SPR resonant wavelengths working range is different, sensitivity also becomes therewith
Change.It can be seen from Fig. 4 that with the gradual increase of grinding angle, red shift, same detection range low-resonance wave integrally occur for working range
Long moving range increases, and sensor average sensitivity is higher and higher.
Finally illustrate, preferred embodiment above is merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent
Pipe has been described in detail the utility model by above preferred embodiment, but those skilled in the art should manage
Solution, can in the form and details make it various changes, without departing from the utility model claims book institute
The range of restriction.
Claims (4)
1. a kind of twin-core fiber transmission-type binary channels spr sensor, including super continuum source 1, coupling note electro-optical device 2, twin-core
Optical fiber 3, two cone angle SPR sensorgram probes 4, multimode fibre 5, spectrometer 6, syringe pump 7, reaction tank 8, waste liquid pool 9, computer 10；
After super continuum source light injects single mode optical fiber, electro-optical device is noted by coupling and injects one fibre core of twin-core fiber, in SPR micro sensings
Device probe is totally reflected twice at two cone angles structure inclined-plane symmetrical above and below, while surface plasma body resonant vibration occurs, and reflected light enters
Horizontal transport in multimode fibre, and send computer disposal after being sent into spectrometer collection reflection loss spectrum；Light dress is noted by coupling
The different fibre cores for replacing twin-core fiber are set, it can be achieved that being based on time-multiplexed double channel optical fiber SPR sensorgram.
2. a kind of twin-core fiber transmission-type binary channels spr sensor according to claim 1, it is characterised in that：Described
Super continuum source 1 is the SuperK COMPACT model super continuum sources of NKT companies；The described coupling note electro-optical device 2 by
Thorlabs companies three-dimensional precise fiber coupling frame loads 10 power microscope eyepieces composition；The twin-core fiber 3, two fibre cores pair
Title is distributed in 125 μm of coverings of same diameter, two 30 μm to 110 μm of fibre core spacing, and every core diameter is 4 μm to 8 μm, is made
500nm-1000nm wavelength wide range optical transmission modes are basic mode or a small amount of low-order mode.
3. a kind of twin-core fiber transmission-type binary channels spr sensor according to claim 1, it is characterised in that：Described
Twin-core fiber 3 and 5 end of multimode reception optical fiber are ground into design by two cone angle SPR sensorgram probes 4 by bare fibre end surface grinding
The same cone angle structure of angle and depth connects two optical fiber, using plasma sputtering method in light using optical fiber core shift welding
40nm is coated on fine cone angle structure inclined-plane 4-1 and 4-2 to 70nm golden films, optical fiber bevel ground angle is 10 ° to 20 °.
4. a kind of twin-core fiber transmission-type binary channels spr sensor according to claim 1, it is characterised in that：Described
Multimode fibre 5 is step-refraction index or graded index multimode fiber, and core diameter is 62.5 μm to 110 μm；Spectrometer 6 is
AQ6373 types visible spectrometry or compact wide range fiber spectrometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720924712.1U CN207703718U (en) | 2017-07-27 | 2017-07-27 | A kind of twin-core fiber transmission-type binary channels spr sensor |
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| CN201720924712.1U CN207703718U (en) | 2017-07-27 | 2017-07-27 | A kind of twin-core fiber transmission-type binary channels spr sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432930A (en) * | 2020-12-08 | 2021-03-02 | 桂林电子科技大学 | Double-channel plastic optical fiber SPR sensor and preparation method thereof |
| CN112432929A (en) * | 2020-12-08 | 2021-03-02 | 桂林电子科技大学 | V-groove structure plastic optical fiber SPR sensor and preparation method thereof |
-
2017
- 2017-07-27 CN CN201720924712.1U patent/CN207703718U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432930A (en) * | 2020-12-08 | 2021-03-02 | 桂林电子科技大学 | Double-channel plastic optical fiber SPR sensor and preparation method thereof |
| CN112432929A (en) * | 2020-12-08 | 2021-03-02 | 桂林电子科技大学 | V-groove structure plastic optical fiber SPR sensor and preparation method thereof |
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