CN207964628U - A kind of device for surveying solution refractive index using the polished end faces reflection of TFBG tail optical fibers - Google Patents
A kind of device for surveying solution refractive index using the polished end faces reflection of TFBG tail optical fibers Download PDFInfo
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- CN207964628U CN207964628U CN201820037996.7U CN201820037996U CN207964628U CN 207964628 U CN207964628 U CN 207964628U CN 201820037996 U CN201820037996 U CN 201820037996U CN 207964628 U CN207964628 U CN 207964628U
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- wire jumper
- optical fiber
- fiber grating
- refractive index
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Abstract
A kind of device for surveying solution refractive index using the polished end faces reflection of TFBG tail optical fibers, including ASE light sources, OSA spectrometers, optical splitter, inclined optical fiber grating, wire jumper I, wire jumper II, wire jumper III, fibre clip, thermal station；Each welding wire jumper II in two points of ends of optical splitter, wire jumper III, another termination ASE light sources of wire jumper II, another termination OSA spectrometers of wire jumper III, optical splitter always terminates inclined optical fiber grating one end, another termination wire jumper of inclined optical fiber grating I, inclined optical fiber grating grid region both sides use optical fiber clamping fixed respectively, by inclined optical fiber grating grid region as in thermal station.The wire jumper head being connected with TFBG need to be only inserted into solution by the utility model, realize solution refractometry, it is greatly improved the service life of sensor, grid region thermostatic control, it can avoid temperature and influence of the refractive index cross sensitivity to reflectance spectrum, data reliability is improved, and the polished end faces maintenance cost of TFBG tail optical fibers is low, easy to operate.
Description
Technical field
The utility model belongs to technical field of optical fiber sensing.
Background technology
Inclined optical fiber grating（TFBG）Since with grid region, there are one the design features of angle with optical fiber axial direction so that TFBG
It not only can will meet the core mode reverse coupled of Bragg condition fl transmissions as common FBG, but also one can be up to
Phase bit matching require before to core mode be coupled in the cladding mode of reverse transfer.
Equipment using oblique raster reflectance spectrum is measured after optical splitter can will be carried out secondary by the transmitted light of fiber grating
Coupling, can enhance sensitivity and the accuracy of sensor, reflectance spectrum can also be utilized to detect, can detect and compare clearly
Reflectance spectrum is convenient for analysis of experimental results, and Site Detection may be implemented.
In existing equipment, solution refractive index is measured using fiber grating, is required for dripping to solution on grid region, using outer
Boundary refractive index, which increases, influences the coupling efficiency that core mode is coupled to cladding mode, so that the cladding mode intensity principle that is lower is surveyed
Measure solution concentration.
Existing equipment measures concentration using fiber grating and is both needed to use grid region, and the cost in grid region will be higher by compared to optical fiber
Very much, and grid region is more prone to damage compared to optical fiber, and the grid region after damage is difficult often to repair, and recoverability is relatively low.
Utility model content
The purpose of this utility model is the deficiency for existing apparatus, and it is anti-to provide a kind of polished end faces using TFBG tail optical fibers
Penetrate the device for surveying solution refractive index and application.
What the utility model was achieved through the following technical solutions.
A kind of device for surveying solution refractive index using the polished end faces reflection of TFBG tail optical fibers described in the utility model, including
ASE light sources, OSA spectrometers, optical splitter, inclined optical fiber grating, wire jumper I, wire jumper II, wire jumper III, fibre clip, thermal station.Wherein,
Each welding wire jumper II in two points of ends of optical splitter, wire jumper III, another termination ASE light sources of wire jumper II, another termination OSA of wire jumper III
Spectrometer, optical splitter always terminate inclined optical fiber grating one end, another termination wire jumper I of inclined optical fiber grating, inclined optical fiber grating grid
Area both sides use optical fiber clamping fixed respectively, by inclined optical fiber grating grid region as in thermal station.
The used polished end faces for measuring solution refractive index inclined optical fiber grating tail optical fiber of the utility model are and tilt optical fiber
I end surface of wire jumper that grating is connected.
The installation steps of the device described in the utility model for surveying solution refractive index are as follows.
（1）Each welding wire jumper II in two points of ends of optical splitter, wire jumper III, wherein wire jumper II connect ASE light sources, III line of another wire jumper
Connect OSA spectrometers.
（2）Optical splitter always holds welding inclined optical fiber grating one end, inclined optical fiber grating other end welding wire jumper I.
（3）At inclined optical fiber grating both ends, optical fiber is clamping fixed, its holding is made to loosen straightened condition.
（4）By inclined optical fiber grating grid region as in thermal station.
The device that solution refractive index is surveyed in a kind of polished end faces reflection using TFBG tail optical fibers described in the utility model is being surveyed
The application in solution refractive index is measured, is as follows.
（1）Device is installed by above-mentioned installation steps.
（2）Thermal station is opened, keeps grid region temperature constant, then open ASE light sources and OSA spectrometers.
（3）Wire jumper I is inserted into solution, makes solution by wire jumper I（Tail optical fiber）Polished end faces be totally submerged, measured solution
Temperature can be controlled by airconditioning control room temperature indirect control, or by water bath.
（4）Solution refractive index is gradually changed, corresponding loss spectrogram under different refractivity is recorded（It is subtracted instead by light source light spectrum
Spectrum is penetrated to obtain）And its data.
（5）By to loss spectral data processing, obtaining mean intensity in cladding mode wave band.
（6）Draw the change curve of mean intensity and its solution refractive index size in cladding mode wave band.
（7）By mean intensity in the cladding mode wave band with the change curve of its solution refractive index size to corresponding molten
Liquid refractive index measures.
The utility model has the technical effect that：The utility model is surveyed solution using the polished end faces reflection of TFBG tail optical fibers and is reflected
Rate goes to measure solution using this method, and without immersing in grid region in solution as traditional measurement method, only needing will be with TFBG
The wire jumper head being connected is inserted into solution, you can to realize the refractometry to solution.This method can be fine by grid region
Protect, the service life of sensor can be greatly improved, while after carrying out thermostatic control to grid region temperature, can also be kept away
Exempt from temperature and influence of the refractive index cross sensitivity to reflectance spectrum, improves the reliability of data, and the polished end of TFBG tail optical fibers
It can the new wire jumper of welding, maintenance cost be low and easy to operate again after the damage of face.
Description of the drawings
Fig. 1 is a kind of polished end faces reflection survey solution refractive index device schematic diagram using TFBG tail optical fibers.Wherein, 1 is ASE
Light source（ASE source）, 2 be OSA spectrometers（OSA）, 3 be optical splitter, 4 be inclined optical fiber grating, 5 be wire jumper I, 6 be wire jumper
II, 7 be that wire jumper III, 8 is fibre clip, 9 is thermal station.
Fig. 2 is mean intensity in cladding mode wave band with the curve of glycerite variations in refractive index.
Fig. 3 is the loss spectrogram that OSA spectrometers obtain when utility model device measures glycerite refraction.
Specific implementation mode
The utility model will be described further in conjunction with attached drawing by following embodiment.
Embodiment 1.
A kind of device for surveying solution refractive index using the polished end faces reflection of TFBG tail optical fibers described in the present embodiment, including
ASE light sources 1, OSA spectrometers 2, optical splitter 3, inclined optical fiber grating 4, wire jumper I 5, wire jumper II 6, wire jumper III 7, fibre clip 8, temperature control
Platform 9.Wherein, each welding wire jumper II 6 in 3 two points of ends of optical splitter, wire jumper III 7, another termination ASE light sources 1 of wire jumper II 6, wire jumper
III 7 another termination OSA spectrometers 2, optical splitter 3 always terminate 4 one end of inclined optical fiber grating, 4 another termination of inclined optical fiber grating
Wire jumper I 5,4 grid region both sides of inclined optical fiber grating use fibre clip 8 to fix respectively, by 4 grid region of inclined optical fiber grating as thermal station 9
Interior, the used polished end faces for measuring solution refractive index inclined optical fiber grating tail optical fiber of the utility model are and inclined optical fiber grating phase
I 5 end surface of wire jumper of connection.
Embodiment 2.
Glycerite refractive index is surveyed using the polished end faces reflection of TFBG tail optical fibers, its step are as follows：It installs and walks according to equipment
Suddenly, equipment is installed.Thermal station is opened, temperature is set, opens light source and spectrometer, regulates spectrometer measurement ginseng
Number starts to measure solution refractive index after registration stabilization.Solution to be measured is fitted into beaker, wire jumper head is inserted into and is burnt
Cup, makes solution be totally submerged the polished end faces of tail optical fiber, same to cross air-conditioning or water bath control so that solution temperature to be measured and system
Temperature when making the curve of mean intensity in cladding mode wave band with glycerite variations in refractive index is consistent, and spectrometer is waited for stablize,
Result parameter is preserved, loss spectrogram such as Fig. 3 of acquisition, processing data obtain mean intensity in cladding mode wave band and are
40.4865dB compares mean intensity in cladding mode wave band and is inferred to glycerine with curve such as Fig. 2 of glycerite variations in refractive index
Refractive index is 1.4095.
Embodiment 3.
NaCl solution refractive index is surveyed using the polished end faces reflection of TFBG tail optical fibers, its step are as follows：It installs and walks according to equipment
Suddenly, equipment is installed.Thermal station is opened, temperature is set, opens light source and spectrometer, regulates spectrometer measurement ginseng
Number starts to measure solution refractive index after registration stabilization.Solution to be measured is fitted into beaker, wire jumper head is inserted into and is burnt
Cup, makes solution be totally submerged the polished end faces of tail optical fiber, same to cross air-conditioning or water bath control so that solution temperature to be measured and system
Temperature when making the curve of mean intensity in cladding mode wave band with NaCl solution variations in refractive index is consistent, and spectrometer is waited for stablize,
Result parameter is preserved, the loss spectrogram that OSA spectrometers obtain when the measurement NaCl solution of acquisition reflects, processing data are wrapped
Layer mould wave band in mean intensity be 38.7001dB, compare cladding mode wave band in mean intensity with NaCl solution variations in refractive index
Curve, it is 1.3584 to be inferred to NaCl refractive index.
Claims (1)
1. the device of solution refractive index is surveyed in a kind of polished end faces reflection using TFBG tail optical fibers, it is characterized in that including ASE light sources,
OSA spectrometers, optical splitter, inclined optical fiber grating, wire jumper I, wire jumper II, wire jumper III, fibre clip, thermal station；Wherein, optical splitter two
Each welding wire jumper II in a point of end, wire jumper III, another termination ASE light sources of wire jumper II, another termination OSA spectrometers of wire jumper III,
Optical splitter always terminates inclined optical fiber grating one end, another termination wire jumper I of inclined optical fiber grating, inclined optical fiber grating grid region both sides point
Not Yong optical fiber it is clamping fixed, by inclined optical fiber grating grid region as in thermal station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820037996.7U CN207964628U (en) | 2018-01-10 | 2018-01-10 | A kind of device for surveying solution refractive index using the polished end faces reflection of TFBG tail optical fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820037996.7U CN207964628U (en) | 2018-01-10 | 2018-01-10 | A kind of device for surveying solution refractive index using the polished end faces reflection of TFBG tail optical fibers |
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| Publication Number | Publication Date |
|---|---|
| CN207964628U true CN207964628U (en) | 2018-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820037996.7U Expired - Fee Related CN207964628U (en) | 2018-01-10 | 2018-01-10 | A kind of device for surveying solution refractive index using the polished end faces reflection of TFBG tail optical fibers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941753A (en) * | 2018-01-10 | 2018-04-20 | 南昌大学 | Device and the application of solution refractive index are surveyed in a kind of polished end faces reflection using TFBG tail optical fibers |
-
2018
- 2018-01-10 CN CN201820037996.7U patent/CN207964628U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941753A (en) * | 2018-01-10 | 2018-04-20 | 南昌大学 | Device and the application of solution refractive index are surveyed in a kind of polished end faces reflection using TFBG tail optical fibers |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181012 Termination date: 20190110 |
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| CF01 | Termination of patent right due to non-payment of annual fee |