CN204374080U - A kind of Mach-Zehnder index sensor based on two spherical structure - Google Patents
A kind of Mach-Zehnder index sensor based on two spherical structure Download PDFInfo
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- CN204374080U CN204374080U CN201420625805.0U CN201420625805U CN204374080U CN 204374080 U CN204374080 U CN 204374080U CN 201420625805 U CN201420625805 U CN 201420625805U CN 204374080 U CN204374080 U CN 204374080U
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Abstract
The utility model provides a kind of Mach-Zehnder index sensor based on two spherical structure, it is characterized in that: be made up of incident optical (1), first two spherical structure (2), first paragraph connecting fiber (3), optical fiber vertebral pulling structure (4), second segment connecting fiber (5), second two spherical structure (6), outgoing optical fiber (7); First two spherical structure (2) and second two same parameter of spherical structure (6) make; First two spherical structure (2) both sides is connected with incident optical (1) and first paragraph connecting fiber (3) respectively, second two spherical structure (6) both sides is connected with second segment connecting fiber (5) and outgoing optical fiber (7) respectively, indirect optical fiber vertebral pulling structure (4) in first paragraph connecting fiber (3) and second segment connecting fiber (5); By incident optical (1), first two spherical structure (2), first paragraph connecting fiber (3), optical fiber vertebral pulling structure (4), second segment connecting fiber (5), second two spherical structure (6), the linear structure that outgoing optical fiber (7) forms.Highly sensitive, the anti-outside electromagnetic interference ability of the utility model is strong, can be applied in all kinds of Practical Project.
Description
Technical field
The utility model provides a kind of Mach-Zehnder index sensor based on two spherical structure, belongs to technical field of optical fiber sensing.
Background technology
Mach-Zehnder interferometer (Mach-Zehnder interferometer) is widely used in optical fiber sensing system.At the initial stage, the Main Function of optical fiber is transmission.When light beam is divided into two bundles through coupling mechanism, when propagating along two optical fiber respectively, wherein a conduct is with reference to light path, and another root is as modulation light path.Two-beam will converge again at next coupling mechanism, interfere.When modulating light path and being subject to ectocine, the light path of the light propagated in modulation light path can change, thus the optical path difference of two-way light can change, and interference fringe also changes accordingly to some extent.By interference fringe change and the corresponding relation of environmental change, just can in the measurements, by the change of the change release environment parameter of interference fringe.Along with the development of optical fiber sensing technology, Mach-Zehnder interferometer to be used for the mode of Fibre Optical Sensor and also to occur to change.The effect of optical fiber also develops from only transfer function the function having transmission and sensing concurrently.The optically-coupled part propagated along fiber core can be entered covering as coupling mechanism by the structure such as vertebral pulling, the amplification of vertebra waist, dislocation, peanut formed after optical fiber being carried out to some processing, and light to be coupled back again fibre core at the next one similar fiber coupler, realize interfering along fibre core with along two parts light that covering is propagated respectively.The principle of Here it is Mach-Zehnder interferometer.When external environment is different on the impact of fibre core covering, the light propagated along fibre core and the light propagated along covering can produce due to the difference of fibre core covering environment reaction to external world the change interfered, and the application of Fibre Optical Sensor is reacted in the change of spectrogram.After analyzing the relation between spectrum change and external environment change, just by realizing the monitoring of environment to external world to the monitoring of spectrum change, the effect of sensor can be realized.Vertebral pulling structure itself is except as except the effect of fiber coupler, and environment is more responsive to external world, so often as the part strengthening transducer sensitivity also to make sensor because which increasing impact that external environment propagates core light.The monitoring of strong in electromagnetic interference (EMI), the little space environment of the sensor based on Mach-Zehnder principle of interference there is its obvious advantage, has that cost of manufacture is low, volume is little, sensitivity advantages of higher.
Summary of the invention
The purpose of this utility model is to provide a kind of Mach-Zehnder index sensor based on two spherical structure.The variable quantity of refractive index to be measured can be converted into the change of the spectral extinction ratio of detectable signal by this device.Have structure simple, be easy to operation, sensitivity high.
The utility model is achieved through the following technical solutions:
Based on a Mach-Zehnder index sensor for two spherical structure, it is characterized in that: be made up of incident optical (1), first two spherical structure (2), first paragraph connecting fiber (3), optical fiber vertebral pulling structure (4), second segment connecting fiber (5), second two spherical structure (6), outgoing optical fiber (7); First two spherical structure (2) and second two same parameter of spherical structure (6) make; First two spherical structure (2) both sides is connected with incident optical (1) and first paragraph connecting fiber (3) respectively, second two spherical structure (6) both sides is connected with second segment connecting fiber (5) and outgoing optical fiber (7) respectively, indirect optical fiber vertebral pulling structure (4) in first paragraph connecting fiber (3) and second segment connecting fiber (5); By incident optical (1), first two spherical structure (2), first paragraph connecting fiber (3), optical fiber vertebral pulling structure (4), second segment connecting fiber (5), second two spherical structure (6), outgoing optical fiber (7) composition linear structure.
Described a kind of Mach-Zehnder index sensor based on two spherical structure, it is characterized in that: G.652 incident optical (1), outgoing optical fiber (7), first paragraph connecting fiber (3), second segment connecting fiber (5) can adopt, G.653 and G.655 single-mode fiber, incident optical (1) and outgoing optical fiber (7) length are 20 ~ 40cm, and first paragraph connecting fiber (3), second segment connecting fiber (5) length are 1 ~ 2cm.
Described a kind of Mach-Zehnder index sensor based on two spherical structure, it is characterized in that: it is characterized in that: G.652 first two spherical structure (2) and second pair of spherical structure (6) can adopt, G.653 and G.655 single-mode fiber, and length is 350 ~ 450 μm.
Described a kind of Mach-Zehnder index sensor based on two spherical structure, is characterized in that: G.652 optical fiber vertebral pulling structure (4) can adopt, G.653 and G.655 single-mode fiber, and length is 700 ~ 800 μm.
Principle of work of the present utility model is: incident light is divided into two parts light by first two spherical structure (2), a part is propagated along fibre core, a part is propagated along covering, light transmit along fibre core through second two spherical structure (6) and interfering along the light that covering transmits.During extraneous variations in refractive index, different with the impact of covering on fibre core, cause the effective refractive index difference of fibre core and covering to change, thus cause light to change in the distribution of fibre core and covering, the extinction ratio of derivative spectomstry changes.The extinction ratio of monitoring interference spectrum and reducible variations in refractive index situation.
Accompanying drawing explanation
Fig. 1 is the Mach-Zehnder index sensor schematic diagram based on two spherical structure of the present utility model;
Fig. 2 is the interference spectrum change lab diagram of Fibre Optical Sensor in different refractivity situation of the present utility model;
Fig. 3 is refractive index sensitivity line style fitted figure of the present utility model;
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is further described:
See accompanying drawing 1, based on a Mach-Zehnder index sensor for two spherical structure, be made up of incident optical (1), first two spherical structure (2), first paragraph connecting fiber (3), optical fiber vertebral pulling structure (4), second segment connecting fiber (5), second two spherical structure (6), outgoing optical fiber (7); First two spherical structure (2) and second two same parameter of spherical structure (6) make; First two spherical structure (2) both sides is connected with incident optical (1) and first paragraph connecting fiber (3) respectively, second two spherical structure (6) both sides is connected with second segment connecting fiber (5) and outgoing optical fiber (7) respectively, indirect optical fiber vertebral pulling structure (4) in first paragraph connecting fiber (3) and second segment connecting fiber (5); By incident optical (1), first two spherical structure (2), first paragraph connecting fiber (3), optical fiber vertebral pulling structure (4), second segment connecting fiber (5), second two spherical structure (6), outgoing optical fiber (7) composition linear structure.
First two spherical structure (6) of two spherical structure (2) second and optical fiber vertebral pulling structure (4) all adopt common G.652 single-mode fiber, two two spherical structure length are 402.6 μm, and optical fiber vertebral pulling structure (4) length is 735.4 μm.The connecting fiber fused at its two ends is common G.652 single-mode fiber, and length is 2cm.Incident optical (1) and outgoing optical fiber (7) all adopt common G.652 single-mode fiber, and length is 30cm.First two spherical structure (2), first paragraph connecting fiber (3), optical fiber vertebral pulling structure (4), second segment connecting fiber (5), the linear structure that second two spherical structure (6) is formed is sensing head part, for detecting the size of extraneous refractive index.During experiment, incident optical (1) and outgoing optical fiber (7) two sections are separately fixed on platform, below sensing head, put a lifting table, lifting table can be put year fragmentation carried with different refractivity liquid.Raising lifting table when measuring, making sensing head and liquid comes into contact, the lifting table that declines after measurement data carries to replace with the microslide of another index liquid.Interference spectrum change lab diagram when Fig. 2 is different refractivity under room temperature condition, visible, when being applied to the refractive index on sensing head and changing in the scope of 1.3334 ~ 1.4081, the interference spectrum of corresponding sensing head changes to 7.786 by 23.891.Fig. 3 is refractive index sensitivity line style fitted figure of the present utility model, when refractive index changes to 1.3692 from 1.3334, the sensitivity of this sensor is 240.78 extinction ratios/refractive index unit, and when refractive index changes to 1.4081 from 1.3692, the sensitivity of this sensor is 186.08 extinction ratios/refractive index unit.
Claims (4)
1. based on a Mach-Zehnder index sensor for two spherical structure, it is characterized in that: be made up of incident optical (1), first two spherical structure (2), first paragraph connecting fiber (3), optical fiber vertebral pulling structure (4), second segment connecting fiber (5), second two spherical structure (6), outgoing optical fiber (7); First two spherical structure (2) and second two same parameter of spherical structure (6) make; First two spherical structure (2) both sides is connected with incident optical (1) and first paragraph connecting fiber (3) respectively, second two spherical structure (6) both sides is connected with second segment connecting fiber (5) and outgoing optical fiber (7) respectively, indirect optical fiber vertebral pulling structure (4) in first paragraph connecting fiber (3) and second segment connecting fiber (5); By incident optical (1), first two spherical structure (2), first paragraph connecting fiber (3), optical fiber vertebral pulling structure (4), second segment connecting fiber (5), second two spherical structure (6), outgoing optical fiber (7) composition linear structure.
2. a kind of Mach-Zehnder index sensor based on two spherical structure according to claim 1, it is characterized in that: G.652 incident optical (1), outgoing optical fiber (7), first paragraph connecting fiber (3), second segment connecting fiber (5) can adopt, G.653 and G.655 single-mode fiber, incident optical (1) and outgoing optical fiber (7) length are 20 ~ 40cm, and first paragraph connecting fiber (3), second segment connecting fiber (5) length are 1 ~ 2cm.
3. a kind of Mach-Zehnder index sensor based on two spherical structure according to claim 1, it is characterized in that: G.652 first two spherical structure (2) and second pair of spherical structure (6) can adopt, G.653 and G.655 single-mode fiber, and length is 350 ~ 450 μm.
4. a kind of Mach-Zehnder index sensor based on two spherical structure according to claim 1, is characterized in that: G.652 optical fiber vertebral pulling structure (4) can adopt, G.653 and G.655 single-mode fiber, and length is 700 ~ 800 μm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420625805.0U CN204374080U (en) | 2014-10-23 | 2014-10-23 | A kind of Mach-Zehnder index sensor based on two spherical structure |
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| CN201420625805.0U CN204374080U (en) | 2014-10-23 | 2014-10-23 | A kind of Mach-Zehnder index sensor based on two spherical structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297209A (en) * | 2014-10-23 | 2015-01-21 | 中国计量学院 | Mach-Zehnder refractive index sensor based on peanut-taper-peanut structure |
| CN106768049A (en) * | 2016-12-21 | 2017-05-31 | 中国计量大学 | A kind of Fibre Optical Sensor of the temperature based on Mach-Zehnder interferometer and refractive index synchro measure |
-
2014
- 2014-10-23 CN CN201420625805.0U patent/CN204374080U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297209A (en) * | 2014-10-23 | 2015-01-21 | 中国计量学院 | Mach-Zehnder refractive index sensor based on peanut-taper-peanut structure |
| CN106768049A (en) * | 2016-12-21 | 2017-05-31 | 中国计量大学 | A kind of Fibre Optical Sensor of the temperature based on Mach-Zehnder interferometer and refractive index synchro measure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20151023 |
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| EXPY | Termination of patent right or utility model |