CN112526234A - Grating optical fiber electric field detection device - Google Patents
Grating optical fiber electric field detection device Download PDFInfo
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- CN112526234A CN112526234A CN202011305848.7A CN202011305848A CN112526234A CN 112526234 A CN112526234 A CN 112526234A CN 202011305848 A CN202011305848 A CN 202011305848A CN 112526234 A CN112526234 A CN 112526234A
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- optical fiber
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- electric field
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention provides a grating optical fiber electric field detection device which comprises a grating optical fiber, a first optical fiber, a second optical fiber, a first force application part and a second force application part, wherein two ends of the grating optical fiber are respectively connected with the first optical fiber and the second optical fiber, the first force application part is fixed at the joint of the first optical fiber and the grating optical fiber, the second force application part is fixed at the joint of the second optical fiber and the grating optical fiber, a cavity is arranged in the grating optical fiber, and organic conjugated polymer materials are filled in the cavity. The invention has the advantage of high electric field detection sensitivity. In addition, the invention also has the advantage of high electric field detection accuracy.
Description
Technical Field
The invention relates to the field of electric field detection, in particular to a grating optical fiber electric field detection device.
Background
The measurement of the electric field has great significance for military industry such as missile, aircraft, rocket launching and the like, and also has wide application in places which are easy to cause static electricity and are easy to be damaged by static electricity and radar on civil ground such as urban environmental pollution, oil refineries, ultra-clean laboratories, oil storage stations and the like. The size of the traditional electric field measuring device is large, and the exploration of an electric field detection technology based on a new principle has important significance for reducing the size of the electric field measuring device.
Disclosure of Invention
In order to solve the above problems, the present invention provides a grating optical fiber electric field detection device, which includes a grating optical fiber, a first optical fiber, a second optical fiber, a first force application portion and a second force application portion, wherein two ends of the grating optical fiber are respectively connected to the first optical fiber and the second optical fiber, the first force application portion is fixed at a connection position of the first optical fiber and the grating optical fiber, the second force application portion is fixed at a connection position of the second optical fiber and the grating optical fiber, a cavity is arranged in the grating optical fiber, and an organic conjugated polymer material is filled in the cavity.
Further, the organic conjugated polymer material is poly-3-hexylthiophene.
Further, the cavity is cylindrical, with the axis of the cavity along the direction of the grating fiber.
Further, the number of the cavities is two.
Further, the two cavities are parallel.
Further, a cavity extends through the grating fiber.
Furthermore, the first optical fiber, the second optical fiber and the grating optical fiber are single-mode optical fibers.
The invention has the beneficial effects that: the invention provides a grating optical fiber electric field detection device which comprises a grating optical fiber, a first optical fiber, a second optical fiber, a first force application part and a second force application part, wherein two ends of the grating optical fiber are respectively connected with the first optical fiber and the second optical fiber, the first force application part is fixed at the joint of the first optical fiber and the grating optical fiber, the second force application part is fixed at the joint of the second optical fiber and the grating optical fiber, a cavity is arranged in the grating optical fiber, and organic conjugated polymer materials are filled in the cavity. When the grating fiber sensor is applied, firstly, fixed pressure is applied between the first force application part and the second force application part in a space without an electric field, and the transmission characteristic of the grating fiber is measured; then, the invention is placed in the electric field space to be measured, simultaneously infrared rays are applied to heat the organic conjugated polymer material, after the organic conjugated polymer material is heated for a period of time, the organic conjugated polymer material is cooled, the pressure between the first force application part and the second force application part is kept unchanged, and the transmission characteristic of the grating optical fiber is measured again. And determining the electric field to be measured according to the change of the transmission characteristics of the front and the rear grating fibers. In the process, the direction of the molecular chain of the organic conjugated polymer material is changed by the electric field to be detected, so that the dielectric environment in the cavity is changed, the whole length and the period length of the grating optical fiber are changed, and the transmission characteristic of the grating optical fiber is further changed. Therefore, the invention has the advantage of high electric field detection sensitivity. In addition, the organic conjugated polymer material is arranged in the grating optical fiber, and the influence of external environments such as humidity on the transmission characteristic of the grating optical fiber is small, so that the invention also has the advantage of high electric field detection accuracy.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a grating fiber optic electric field detection device.
FIG. 2 is a schematic diagram of another optical fiber electric field detection device.
In the figure: 1. a grating optical fiber; 2. a first optical fiber; 3. a second optical fiber; 4. a first force application part; 5. a second force application part; 6. a cavity.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Example 1
The invention provides a grating optical fiber electric field detection device, which comprises a grating optical fiber 1, a first optical fiber 2, a second optical fiber 3, a first force application part 4 and a second force application part 5, as shown in figure 1. The first optical fiber 2, the second optical fiber 3 and the grating optical fiber 1 are single mode optical fibers. The two ends of the grating fiber 1 are respectively connected with a first fiber 2 and a second fiber 3. Specifically, the two ends of the grating fiber 1 may be connected to the first fiber 2 and the second fiber 3 by fusion splicing. The first force application part 4 is fixed to the connection between the first optical fiber 2 and the grating fiber 1. Specifically, the first force application portion 4 surrounds the connection portion of the first optical fiber 2 and the grating fiber 1. The second force application part 5 is fixed at the joint of the second optical fiber 3 and the grating fiber 1. Specifically, the second force application portion 5 surrounds the connection portion of the second optical fiber 3 and the grating fiber 1. The grating fiber 1 is provided with a cavity 6. The cavity 6 is cylindrical and the axis of the cavity 6 is along the direction of the grating fiber 1. The cavity 6 is filled with an organic conjugated polymer material. The organic conjugated polymer material is poly-3-hexylthiophene. When the electric field is heated, the micro appearance of the poly-3-hexylthiophene is easier to be regulated and controlled by the electric field to be measured.
When the grating fiber 1 is applied, firstly, fixed pressure is applied between the first force application part 4 and the second force application part 5 in a space without an electric field, and the transmission characteristic of the grating fiber 1 is measured; specifically, a laser light source emits continuous spectrum laser, the continuous spectrum laser is coupled into a first optical fiber 2, then the continuous spectrum laser enters a grating optical fiber 1 and then enters a second optical fiber 3, and a detector is used for detecting a laser spectrum emitted from the second optical fiber 3, so that the transmission characteristic of the grating optical fiber 1 is obtained. Then, the invention is placed in the electric field space to be measured, infrared rays are applied to heat the organic conjugated polymer material at the same time, after the organic conjugated polymer material is heated for a period of time, the organic conjugated polymer material is cooled, the pressure between the first force application part 4 and the second force application part 5 is kept unchanged, and the transmission characteristic of the grating optical fiber 1 is measured again. And determining the electric field to be measured according to the change of the transmission characteristics of the front and rear grating fibers 1. The heating is carried out at a temperature greater than 130 degrees celsius for a time greater than 30 minutes to facilitate sufficient modification of the microstructure of the organic conjugated polymer material. In the process, the direction of the molecular chain of the organic conjugated polymer material is changed by the electric field to be detected, so that the dielectric environment in the cavity 6 is changed, the whole length and the period length of the grating optical fiber 1 are changed, and the transmission characteristic of the grating optical fiber 1 is further changed. Therefore, the invention has the advantage of high electric field detection sensitivity. In addition, the organic conjugated polymer material is arranged in the grating optical fiber 1, and the influence of external environments such as humidity on the transmission characteristic of the grating optical fiber 1 is small, so that the invention also has the advantage of high electric field detection accuracy.
Example 2
In example 1, as shown in fig. 2, two cavities 6 penetrate the grating fiber 1, and the two cavities 6 are parallel to each other. In this way, a separate region is formed between the two cavities 6. The direction of the organic conjugated polymer material molecular chains in the two cavities 6 seriously influences the coupling of the optical fields in the two cavities 6, so that the effective refractive index of the grating optical fiber 1 is seriously influenced, and when the direction of the organic conjugated polymer material molecular chains is changed, the transmission characteristic of the grating optical fiber 1 is seriously changed, so that the sensitivity of electric field detection is further improved.
Further, the distance between the cavities is less than 100 nm to enhance the coupling of the optical fields in the two cavities 6.
Example 3
On the basis of the embodiment 1, the cavity 6 is arranged along the direction of the grating fiber 1, the diameter of the cavity 6 is periodically arranged, and the period of the diameter arrangement of the cavity 6 is the same as that of the grating fiber 1. At the low refractive index of the grating fiber 1, the diameter of the cavity 6 is large; at high refractive indices of the grating fiber 1, the diameter of the cavity 6 is small. Thus, when the molecular chain direction of the organic conjugated polymer material in the cavity 6 changes, that is, the effective refractive index of the organic conjugated polymer material changes, the resonant wavelength of the grating fiber 1 changes more, thereby realizing electric field detection with higher sensitivity.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. The utility model provides a grating optic fibre electric field detection device which characterized in that, includes grating optic fibre, first optic fibre, second optic fibre, first application of force portion, second application of force portion, the both ends of grating optic fibre are connected respectively first optic fibre with the second optic fibre, first application of force portion is fixed first optic fibre with the junction of grating optic fibre, second application of force portion is fixed the junction of second optic fibre with grating optic fibre, be equipped with the cavity in the grating optic fibre, the cavity intussuseption is filled with organic conjugated polymer material.
2. The electrical field sensing device of a grated fiber as claimed in claim 1, wherein: the organic conjugated polymer material is poly-3-hexylthiophene.
3. The electrical field sensing device of a grated fiber as claimed in claim 2, wherein: the cavity is cylindrical, and the axis of the cavity is along the direction of the grating optical fiber.
4. The electrical field sensing device of claim 3, wherein: the number of the cavities is two.
5. The electrical field sensing device of claim 4, wherein: the two cavities are parallel.
6. The grating fiber optic electric field sensing device of any one of claims 1-5, wherein: the cavity penetrates through the grating fiber.
7. The electrical field sensing device of a grated fiber as claimed in claim 6, wherein: the first optical fiber, the second optical fiber and the grating optical fiber are single-mode optical fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011305848.7A CN112526234A (en) | 2020-11-20 | 2020-11-20 | Grating optical fiber electric field detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011305848.7A CN112526234A (en) | 2020-11-20 | 2020-11-20 | Grating optical fiber electric field detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112526234A true CN112526234A (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011305848.7A Withdrawn CN112526234A (en) | 2020-11-20 | 2020-11-20 | Grating optical fiber electric field detection device |
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| CN (1) | CN112526234A (en) |
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2020
- 2020-11-20 CN CN202011305848.7A patent/CN112526234A/en not_active Withdrawn
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Application publication date: 20210319 |
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