CN206362461U - Double microballoon temperature sensors based on silica optical fiber - Google Patents
Double microballoon temperature sensors based on silica optical fiber Download PDFInfo
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- CN206362461U CN206362461U CN201620993500.4U CN201620993500U CN206362461U CN 206362461 U CN206362461 U CN 206362461U CN 201620993500 U CN201620993500 U CN 201620993500U CN 206362461 U CN206362461 U CN 206362461U
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- optical fiber
- microballoon
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- microballoons
- temperature sensors
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Abstract
The utility model is related to a kind of double microballoon temperature sensors based on silica optical fiber, belongs to technical field of optical fiber sensing.This pair of microballoon temperature sensor includes light source, silica optical fiber module and spectral detector；The first coupling optical fiber is still further comprised in the silica optical fiber module, double microballoons and the second coupling optical fiber, the first microballoon and the micro-sphere structure of the second microballoon that the described pair of microballoon is serially connected for a kind of two based on silica optical fiber, the structure constitutes a mach zhender type interferometer, so as to realize the highly sensitive and high stability detection to environment temperature.The detection sensitivity for double microballoon temperature sensors based on silica optical fiber that the utility model is provided has the characteristics of size is small, loss is low up to 20.12 micromicrons/degrees Celsius.
Description
Technical field
The utility model is related to a kind of fibre optic temperature sensor, more particularly to a kind of double microballoons based on silica optical fiber
Temperature sensor, belongs to technical field of optical fiber sensing.
Background technology
In recent years, fibre optical sensor is low due to lightweight, being lost, and size is small, the characteristic such as electromagnetism interference, extensive
Apply in many sensory fields；Such as fibre optic temperature sensor, optic fibre refractive index sensor, fibre optic compression sensor.Its
Middle fibre optic temperature sensor is as the critical component of detection temperature parameter, and in food security, biomedical and environment measuring etc. is square
Mask plays an important role.The basic functional principle of fibre optic temperature sensor is to send into the optical signal from light source by optical fiber to pass
Feel part, with the change of transducing part environment temperature, the optical property such as light for the light for causing to be transferred through transducing part it is strong
Degree, wavelength, phase etc. change；Photo-detector is sent into by optical fiber again, is realized to the detection of temperature, analysis, monitoring.Optical fiber
Temperature sensor combines the advantage of the subjects such as fibre optics, precision optical machinery and microelectronics, can solve conventional temperature sensing
Device exist such as poor water resistance, heat-resisting quantity are poor, understand by electromagnetism and atomic radiation interference, heavier-weight, volume be larger, discomfort
For precision detection etc. technical barrier so that fibre optic temperature sensor is further towards sensitive, accurate, strong adaptability, compact
Develop with intelligentized direction.In summary, fibre optic temperature sensor has very big application market demand, therefore to optical fiber temperature
Spending the further research and development of sensor turns into the task of top priority.
The content of the invention
The purpose of this utility model be just to provide a kind of small volume, lightweight, compact conformation, stability it is strong based on dioxy
Double microballoon temperature sensors of SiClx optical fiber.
Fundamental design idea of the present utility model is：A kind of double microballoon TEMPs based on silica optical fiber of design
Device.It includes light source, silica optical fiber module and spectral detector；The silica optical fiber module still further comprises first
Couple optical fiber, double microballoons and the second coupling optical fiber；Double microballoons include the first microballoon and the second microballoon, are that one kind is based on silica
The micro-sphere structure that two of optical fiber are serially connected, they constitute a mach zhender type interferometer；The light that the light source is sent
It is transferred through after the first coupling optical fiber and enters double microballoons, because described pair of microballoon constitutes a mach zhender type interferometer, when
During variation of ambient temperature, can occur real time offset by the transmission spectrum of double microballoons, be received using spectral detector by double micro-
The change of the transmission spectrum of ball, and then obtain environment temperature to be measured.
To realize above-mentioned purpose of the present utility model, the technical scheme that the utility model is constituted using following technical measures come
Realize.
A kind of double microballoon temperature sensors based on silica optical fiber described in the utility model, including light source, dioxy
SiClx optic module and spectral detector；According to the utility model, still further comprised in the silica optical fiber module
First coupling optical fiber, double microballoons and the second coupling optical fiber；The light source is arranged at one end of double microballoons by the first coupling optical fiber,
Upstream end with the first coupling optical fiber is corresponding；The optical transport that the light source is sent enters double microballoons after the first coupling optical fiber,
Light is propagated in double microballoons, then enters back into the second coupling optical fiber, and by being positioned over the spectral detector of this pair of microballoon other end
The change of interference transmission spectrum is received, and then obtains environment temperature to be measured.
In above-mentioned technical proposal, described double microballoons are two based on the silica optical fiber microballoon knots being serially connected
Structure.
In above-mentioned technical proposal, two described micro-sphere structures being serially connected include the first microballoon and the second microballoon.
In above-mentioned technical proposal, the first described microballoon and the clad section of the second microballoon are connected, and their fibre core
Part is not connected with, and when optical transport passes through the first microballoon, light beam will be by beam splitting, but when light continues to be transferred through the second microballoon
When, light beam will be converged, and this constitutes a mach zhender type interferometer.
In above-mentioned technical proposal, described light source is wide spectrum light source.
In above-mentioned technical proposal, described spectral detector is spectroanalysis instrument, and the minimum resolution of spectroanalysis instrument is
0.02nm。
Double microballoon temperature sensors described in the utility model based on silica optical fiber, wherein described double microballoons be by
Common communications optical fiber is prepared from；Described the first coupling optical fiber and the second coupling optical fiber is used as the part that light enters and connected,
It is business telecommunication optical fiber.
Double microballoon temperature sensors described in the utility model based on silica optical fiber, due to comprising double microballoons be
Two micro-sphere structures for being serially connected, when optical transport passes through the first microballoon, light beam will be by beam splitting, but optical transport is passing through second
During microballoon, light beam will be converged, therefore this pair of micro-sphere structure constitutes a mach zhender type interferometer, this interferometer
Intensity transmission can be expressed as
Wherein I is the intensity of interference spectrum signal, IcoAnd Icl,mIt is that core mode intensity and m rank cladding modes are strong respectively
Degree.φmIt is the phase difference between core mode and m rank cladding modes.It is having between core mode and m rank cladding modes
Imitate refringence.L is the length of interferometer, and λ is lambda1-wavelength in a vacuum.
Based on equation (1), work as φmDuring odd-multiple as π, reached most by the intensity of the interference spectrum signal of interferometer
Small value；In this case, minimum transfer spectrum can be expressed as
Therefore, when the temperature varies, because thermal expansion effects can cause double microballoons based on silica optical fiber
The elongation percentage for the mach zhender type interferometer length that structure is constituted changes, and brought due to thermo-optic effectChange,
These, which will cause to be transferred through mould field interference spectrum signal in the optical fiber of double micro-sphere structures based on silica optical fiber, occurs
Skew.Because wavelength shift Δ λ/λ that temperature changes relative interference spectrum caused by Δ T can be represented as
WhereinIt is the thermal coefficient of expansion of silica optical fiber,It is hot light
Coefficient.Utilize equation (4), the skew of the wavelength peak based on the interference spectrum by the mach zhender type interferometer, the Mach
Zender interferometer may be used as the change that a kind of fibre optic temperature sensor of compact conformation carrys out sense ambient temperature.
The utility model has the characteristics that and advantageous effects compared with prior art：
1st, double microballoon temperature sensors disclosed in the utility model based on silica optical fiber, due to its pair of microballoon knot
Structure is the micro-sphere structure that a kind of two based on silica optical fiber are serially connected, and when optical transport passes through the first microballoon, light beam will
By beam splitting, but passing through the second microballoon, will occur light beam and assemble, therefore this pair of micro-sphere structure constitutes a mach zhender
Type interferometer, with the change of temperature, it can produce obvious interference fringe, and this can be efficiently used in sensory field.
2nd, double microballoon temperature sensors disclosed in the utility model based on silica optical fiber, because its pair of microballoon is
One-dimentional structure, and be prepared from by common communications optical fiber, smaller compared with other optical fiber structures, power consumption is lower.
3rd, double microballoon temperature sensors disclosed in the utility model based on silica optical fiber, its simple in construction, property
Energy is stable and with higher sensitivity；Its sensitivity can reach 20.12 micromicrons/degrees Celsius.
Brief description of the drawings
Fig. 1 is the overall structure diagram of double microballoon temperature sensors of the utility model based on silica optical fiber；
Fig. 2 is double micro-sphere structure schematic diagrames described in Fig. 1；
Fig. 3 is double microballoon temperature sensors based on silica at a temperature of varying environment in the utility model embodiment one
Interference transmission spectrum schematic diagram；
Fig. 4 is the interference peaks of double microballoon temperature sensors based on silica in the utility model embodiment one with environment
The change curve of temperature.
In figure, 1- light sources, the coupling optical fiber of 2- first, the double microballoons of 3-, the coupling optical fiber of 4- second, 5- spectral detectors, 6- bis-
Silica optical fibre module, the microballoons of 7- first, the microballoons of 8- second.
Embodiment
Below with reference to accompanying drawing and the utility model is described in further detail with embodiment, but it is not meant to be
Any restriction of content is protected to the utility model.
Double microballoon temperature sensors described in the utility model based on silica optical fiber, its structure are as shown in figure 1, bag
Include light source 1, silica optical fiber module 6 and spectral detector 5；Still further comprised in the silica optical fiber module 6
First coupling optical fiber 2, the coupling optical fiber 4 of double microballoons 3 and second；The light source 1 is arranged at double microballoons 3 by the first coupling optical fiber 2
One end, with first coupling optical fiber 2 upstream end it is corresponding；The light that the light source 1 is sent enters double after the first coupling optical fiber 2
Microballoon 3, light is propagated in double microballoons 3；Described pair of microballoon 3 is to be serially connected the microballoon constituted by the first microballoon 7 and the second microballoon 8
Structure, as shown in Figure 2.The first microballoon 7 that described pair of microballoon is included is connected with the clad section of the second microballoon 8, and they
Core segment is not connected with, when optical transport passes through the first microballoon 7, and light beam will be by beam splitting, but light continues to transmit and passing through the
During two microballoons 8, light beam will be converged, and this structure constitutes a mach zhender type interferometer.Then light continues to transmit again
Into the second coupling optical fiber 4, and output interference spectral changes are received by the spectral detector 5 for being positioned over this pair of microballoon other end,
And then obtain environment temperature to be measured.
Embodiment one
The present embodiment is connected respectively according to the structure of double microballoon temperature sensors based on silica optical fiber shown in Fig. 1
Part.
The light source 1 is arranged at one end of double microballoons 3 by the first coupling optical fiber 2, with the first upstream end for coupling optical fiber 2
Correspondence, the particular location of light source 1 is unrestricted, only need to ensure that its light launched can be directly entered the first coupling optical fiber 2.Light
Source 1 is wide spectrum light source, and the scope of its light wave long value launched is between 1075nm-1095nm.
Described spectral detector 5 is arranged at the other end of double microballoons 3, and its particular location is not limited, and need to only ensure double microballoons
It is directly entered in it and is analyzed by the second coupling optical fiber 4 after conduction light extraction；In the present embodiment, spectral detector 5 is spectrum analysis
Instrument.
Described pair of microballoon 3 is to be prepared from using common communications optical fiber by arc discharge method, different by setting to put
The first microballoon 7 and the second microballoon 8 that electric strength and discharge period, can to prepare diameter different, then utilize electric arc melting
Method by be prepared into the first microballoon 7 be serially connected with the second microballoon 8 together with double microballoons 3, formed and a kind of be based on silica light
Fine double micro-sphere structures,
A diameter of 236 μm of the first microballoon 7 that described pair of microballoon 3 includes, a diameter of 226 μm of the second microballoon 8.Double microballoons
3 Refractive Index of Material n are 1.46, and the length of this pair of microballoon 3 is 462 μm.Different strength of discharge and electric discharge are set during by preparing
Duration, the parameter of this pair of microballoon 3 can be reset.
First microballoon 7 is connected with the clad section of the second microballoon 8 and core segment is not connected with.In use, will
Double microballoons 3 are placed in tube furnace, and temperature range can be increased to 170 DEG C from room temperature, after after temperature stabilization in stove, open light source 1, light
The optical transport that source 1 is sent enters in double microballoons 3 by the first coupling optical fiber 2, and light is propagated in double microballoons 3, by being serially connected
The first microballoon 7 and the second microballoon 8, derived light pass through second coupling optical fiber 4 enter spectral detector 5 be spectroanalysis instrument；
When light is propagated in double microballoons 3, spectroanalysis instrument can detect what double micro-sphere structures based on silica optical fiber were constituted
The interference transmission spectrum change of mach zhender type interferometer.Choosing it interferes transmission spectrum as peak is indicated, its corresponding this is based on
The sensitivity of double microballoon temperature sensors of silica optical fiber is
R=λ (a+ ξ) (5)
The interference transmission spectrum schematic diagram of the varying environment temperature obtained by embodiment one is as shown in figure 3, the present embodiment light
The wave-length coverage for the light beam that source 1 is sent is 1075nm-1095nm, chooses wavelength and is used as instruction for 1079nm interference peaks wavelength
Wavelength, corresponding wave-length coverage is that the wavelength corresponding to the peak value of curve in 1075nm-1085nm, Fig. 3 is spectroanalysis instrument inspection
The wavelength of survey, the peak value changes with the change of environment temperature, the different wavelength of different environment temperature correspondences.
The Mach for double micro-sphere structures composition that should be based on silica optical fiber that the utility model is obtained by embodiment one
The change curve of the interference wave personal attendant environment temperature to be measured of Zender interferometer as shown in figure 4, choose temperature be 30 DEG C by with
Make initial temperature, corresponding interference peaks wavelength 1079nm is initial wavelength, and with the rise of environment temperature, line occurs for interference wave length
Property skew, corresponding sensitivity R be 20.21 micromicrons/degrees Celsius.This good linear sensitivity causes this to be based on dioxy
Double microballoon temperature sensors of SiClx optical fiber are in many application field great potentials.
Claims (6)
1. a kind of double microballoon temperature sensors based on silica optical fiber, including light source (1), silica optical fiber module (6)
With spectral detector (5)；It is characterized in that still further comprising the first coupling optical fiber in the silica optical fiber module (6)
(2), double microballoons (3) and the second coupling optical fiber (4)；The light source (1) is arranged at double microballoons (3) by the first coupling optical fiber (2)
One end, with first coupling optical fiber (2) upstream end it is corresponding；The optical transport that light source (1) is sent is after the first coupling optical fiber (2)
Into double microballoons (3), light is propagated in double microballoons (3), and the second coupling optical fiber (4) is then transferred into again, described by being positioned over
The spectral detector (5) of the other end of double microballoons (3) receives output optical signal, and detects the spectrum change of output light.
2. double microballoon temperature sensors according to claim 1 based on silica optical fiber, it is characterised in that described
Double microballoons (3) are two based on the silica optical fiber micro-sphere structures being serially connected.
3. double microballoon temperature sensors according to claim 2 based on silica optical fiber, it is characterised in that described two
The individual micro-sphere structure being serially connected includes the first microballoon (7) and the second microballoon (8).
4. double microballoon temperature sensors according to claim 3 based on silica optical fiber, it is characterised in that described
First microballoon (7) is connected with the clad section of the second microballoon (8), and their core segment is not connected with, when optical transport warp
When crossing the first microballoon (7), light beam will be by beam splitting, but when light continues to be transferred through the second microballoon (8), light beam will be converged,
This constitutes a mach zhender type interferometer.
5. double microballoon temperature sensors according to claim 1 based on silica optical fiber, it is characterised in that described
Light source (1) is wide spectrum light source.
6. double microballoon temperature sensors according to claim 1 based on silica optical fiber, it is characterised in that described
Spectral detector (5) is spectroanalysis instrument, and the minimum resolution of spectroanalysis instrument is 0.02nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620993500.4U CN206362461U (en) | 2016-08-30 | 2016-08-30 | Double microballoon temperature sensors based on silica optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620993500.4U CN206362461U (en) | 2016-08-30 | 2016-08-30 | Double microballoon temperature sensors based on silica optical fiber |
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| CN201620993500.4U Withdrawn - After Issue CN206362461U (en) | 2016-08-30 | 2016-08-30 | Double microballoon temperature sensors based on silica optical fiber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338349A (en) * | 2016-08-30 | 2017-01-18 | 四川大学 | Silicon dioxide fiber based double-microballoon temperature sensor |
| CN110008574A (en) * | 2019-03-29 | 2019-07-12 | 京东方科技集团股份有限公司 | Temperature parameter and pressure parameter acquisition methods, device, equipment and storage medium |
| CN112729776A (en) * | 2020-12-09 | 2021-04-30 | 哈尔滨工程大学 | Device for detecting substrate thermal uniformity by utilizing double-microsphere coupling mode splitting |
-
2016
- 2016-08-30 CN CN201620993500.4U patent/CN206362461U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338349A (en) * | 2016-08-30 | 2017-01-18 | 四川大学 | Silicon dioxide fiber based double-microballoon temperature sensor |
| CN110008574A (en) * | 2019-03-29 | 2019-07-12 | 京东方科技集团股份有限公司 | Temperature parameter and pressure parameter acquisition methods, device, equipment and storage medium |
| CN110008574B (en) * | 2019-03-29 | 2022-12-13 | 京东方科技集团股份有限公司 | Temperature parameter and pressure parameter acquisition method, device, equipment and storage medium |
| CN112729776A (en) * | 2020-12-09 | 2021-04-30 | 哈尔滨工程大学 | Device for detecting substrate thermal uniformity by utilizing double-microsphere coupling mode splitting |
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