CN113448016A - Simple optical fiber bending deformation device - Google Patents
Simple optical fiber bending deformation device Download PDFInfo
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- CN113448016A CN113448016A CN202110725770.2A CN202110725770A CN113448016A CN 113448016 A CN113448016 A CN 113448016A CN 202110725770 A CN202110725770 A CN 202110725770A CN 113448016 A CN113448016 A CN 113448016A
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- bending
- optical fiber
- deformer
- substrate
- bend
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- 238000005452 bending Methods 0.000 title claims abstract description 88
- 239000013307 optical fiber Substances 0.000 title claims abstract description 71
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 239000000835 fiber Substances 0.000 claims description 9
- 239000013013 elastic material Substances 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/264—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
- G02B6/266—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting the optical element being an attenuator
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The invention relates to a simple optical fiber bending deformation device which comprises a substrate (1), a bending deformer (2) and an optical fiber (3), wherein the bending deformer (2) is fixed on the substrate (1), the bending deformer (2) is an elastic rod, the optical fiber (3) is spirally wound on the outer surface of the bending deformer (2) along the axial direction of the bending deformer (2), and two ends of the optical fiber (3) are free ends. Compared with the prior art, the invention has the advantages of simple integral structure, large adjustable light intensity range, high sensitivity and easy operation.
Description
Technical Field
The invention belongs to the field of optical fiber sensing, and particularly relates to a simple optical fiber bending deformation device.
Background
Fiber bend deformers are devices widely used in the field of optical fibers. And the bending deformer is used for generating bending loss on the optical fiber so as to realize intensity modulation on the signal light in the optical fiber.
The optical fiber bending deformer commonly used at present is a clamping plate type deformer, the structure of the optical fiber bending deformer is an upper pressing plate and a lower pressing plate, the upper pressing plate and the lower pressing plate are respectively provided with an upper insection and a lower insection which are staggered with each other on the surface contacted with the optical fiber, and the optical fiber is arranged between the upper insection and the lower insection. When pressure is applied, the distance between the upper and lower insections is reduced to bend the optical fiber, so that the modulation of the intensity of signal light in the optical fiber is realized, the structure has less deformed teeth, the length of the sensing optical fiber between the deformed teeth is short, the capability of acquiring data is poorer, the bending curvature of the sensing optical fiber is large, the service life is short, the acquired data has high precision and small dynamic range, or the dynamic range is large and low in precision, the requirements of practical application cannot be met, the preparation process is complex, and the size is large.
Disclosure of Invention
The invention aims to provide a simple optical fiber bending deformation device which is simple in overall structure, large in adjustable light intensity range, high in sensitivity and easy to operate.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a simple and easy type optic fibre bending deformation device, the device includes substrate, bending deformation ware and optic fibre, the bending deformation ware is fixed on the substrate, the bending deformation ware is the elastic rod, optic fibre is the heliciform winding on the surface of bending deformation ware along the axis direction of bending deformation ware, the both ends of optic fibre are the free end. The bending deformer can be set to be proper in length and diameter according to actual needs.
The central axis of the bending deformer is parallel to the plane of the substrate, namely the bending deformer is horizontally fixed on the substrate.
The bending deformer is cylindrical, and the cross section of the bending deformer is circular.
The side of the bending deformer is smooth, so that the situation that the optical fiber is extruded or deflected when being wound is avoided, and the situation that the bending degree on the partial optical fiber is locally changed in an initial state is avoided.
And two ends of the bending deformer are fixed on the substrate.
A gap for the optical fiber to pass through is formed between the middle part of the bending deformer and the substrate, so that the optical fiber is prevented from being extruded in an initial state.
The gap is larger than the diameter of the optical fiber.
The bending deformer is made of elastic materials, and the elastic materials comprise materials such as rubber, latex and the like.
The pitch of the optical fiber is greater than the diameter of the optical fiber. The number of windings of the optical fiber can be adjusted by changing the pitch of the optical fiber, thereby modulating the light intensity in the optical fiber.
When the device is used, the two ends of the optical fiber are connected with the connecting points, and then external force is applied to the bending deformer to deform the bending deformer, so that the bending degree of the optical fiber is changed.
The external force is applied to the side face of the bending deformer, and the bending deformer deforms in the radial direction.
When the device is manufactured, the length and the diameter of the bending deformer are adjusted according to the actual light intensity modulation requirement.
When the bending deformer is installed, no pressure is applied to the bending deformer, namely the bending deformer is not deformed in the initial state, so that the bending loss of the optical fiber wound on the bending deformer is as small as possible. Because the unstressed cross section of the bending deformer is circular, when external pressure is applied to the side face of the bending deformer, the cross section is changed from circular to elliptical, and the ovality of the cross section is changed along with the change of the external pressure, so that the bending degree of the optical fiber is changed.
The principle of adjusting the optical signal intensity in the optical fiber is consistent with the principle of the prior art, namely the ellipticity of the elastic rod is changed by adjusting the applied pressure, the pressure is increased, the cross section of the elastic rod is flattened, the bending degree of the optical fiber wound on the elastic rod is increased, the loss of the optical wave is further increased, the adjustment of the optical signal intensity in the optical fiber is realized, and the adjustable optical attenuation is realized. The invention makes full use of the characteristics of the material, so that the modulation parameters of the bending deformer change along with the external pressure, and the bending degree of the optical fiber is changed by changing the ovality of the elastic rod.
In conclusion, the beneficial effects of the invention are as follows:
the invention adopts an elastic rod made of elastic material as a bending deformer, the optical fiber is wound on the elastic rod, the shape of the cross section of the elastic rod is adjusted by utilizing the change of the external pressure, the bending degree of the optical fiber is changed, and the intensity of signal light in the optical fiber is modulated to realize adjustable light attenuation. And meanwhile, the degree of light attenuation is easily changed by adjusting the winding turns of the optical fiber. The invention has simple structure, and the sensing parameters (such as the length and the diameter of the bending deformer and the winding turns of the optical fiber) are convenient to adjust and easy to realize.
Drawings
FIG. 1 is a schematic structural diagram of a simplified optical fiber bending and deforming apparatus.
In the figure: 1-a substrate; 2-a bending deformer; 3-optical fiber.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Example 1
As shown in fig. 1, a simple optical fiber bending deformation device includes a substrate 1, a bending deformer 2 and an optical fiber 3, the bending deformer 2 is fixed on the substrate 1, the bending deformer 2 is made of an elastic rod made of an elastic material and is cylindrical, a central axis is parallel to a plane where the substrate 1 is located (i.e., the bending deformer is horizontally fixed on the substrate), the cross section is circular, the side surface is smooth, the optical fiber 3 is spirally wound on the outer surface of the bending deformer 2 along the axial direction of the bending deformer 2, and two ends of the optical fiber 3 are free ends.
When the device is used, the two ends of the optical fiber 3 are connected with the connection points, and then external force is applied to the side surface of the bending deformer 2 to enable the bending deformer 2 to deform radially, so that the bending degree of the optical fiber 3 is changed.
Example 2
As shown in fig. 1, a simplified optical fiber bending deformation apparatus is the same as that of example 1 except that both ends of a bending deformer 2 are fixed to a substrate 1, and a gap through which an optical fiber 3 passes is provided between the middle of the bending deformer 2 and the substrate 1, the gap being larger than the diameter of the optical fiber.
Example 3
As shown in fig. 1, a simplified optical fiber bending deformation apparatus is the same as that of example 1 except that the pitch of the optical fiber 3 is larger than the diameter of the optical fiber 3.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The utility model provides a simple and easy type optic fibre bending deformation device, its characterized in that, the device includes substrate (1), bending deformation ware (2) and optic fibre (3), bending deformation ware (2) are fixed on substrate (1), bending deformation ware (2) are the elastic rod, optic fibre (3) are the heliciform along the axis direction of bending deformation ware (2) and twine on the surface of bending deformation ware (2), the both ends of optic fibre (3) are the free end.
2. The simplified optical fiber bending and deforming apparatus according to claim 1, wherein a central axis of the bending deformer (2) is parallel to a plane of the substrate (1).
3. The simplified optical fiber bending and deforming apparatus according to claim 2, wherein the bending deformer (2) has a cylindrical shape, and the cross section of the bending deformer (2) is circular.
4. A simplified optical fibre bend deformer device according to claim 2, wherein said bend deformer (2) is smooth sided.
5. A simplified optical fiber bending deformer according to claim 2, wherein both ends of said bending deformer (2) are fixed to the substrate (1).
6. A simplified optical fiber bending deformer according to claim 5, wherein a gap is present between the middle of said bending deformer (2) and the substrate (1) for the optical fiber (3) to pass through.
7. The simplified optical fiber bending and deforming apparatus according to claim 1, wherein the bending deformer (2) is made of an elastic material.
8. A simplified optical fiber bend distortion device according to claim 1, wherein the pitch of the optical fiber (3) is larger than the diameter of the optical fiber (3).
9. The simplified optical fiber bending and deforming apparatus according to claim 1, wherein the apparatus is used by connecting both ends of the optical fiber (3) to the connection points, and then applying an external force to the bending deformer (2) to deform the bending deformer (2) so as to change the bending degree of the optical fiber (3).
10. A simplified optical fiber bend deformer device according to claim 9, wherein said external force is applied to the side of the bend deformer (2) and said bend deformer (2) is radially deformed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110725770.2A CN113448016A (en) | 2021-06-29 | 2021-06-29 | Simple optical fiber bending deformation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110725770.2A CN113448016A (en) | 2021-06-29 | 2021-06-29 | Simple optical fiber bending deformation device |
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| Publication Number | Publication Date |
|---|---|
| CN113448016A true CN113448016A (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110725770.2A Pending CN113448016A (en) | 2021-06-29 | 2021-06-29 | Simple optical fiber bending deformation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114674349A (en) * | 2022-03-14 | 2022-06-28 | 麒盛科技股份有限公司 | Monitoring device based on optical fiber microbend |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000018981A (en) * | 1998-06-30 | 2000-01-21 | Mitsubishi Heavy Ind Ltd | Optical fiber sensor |
| JP2000097647A (en) * | 1998-09-28 | 2000-04-07 | Ohbayashi Corp | Method for measuring deformation of structure using optical fiber and optical fiber sensor |
| JP2001281082A (en) * | 2000-03-29 | 2001-10-10 | Hitachi Cable Ltd | Seepage line distribution sensor |
| CN101865665A (en) * | 2010-04-06 | 2010-10-20 | 西安金和光学科技有限公司 | Measurement device and method of optical fiber bending parameter |
| CN110703316A (en) * | 2019-10-23 | 2020-01-17 | 电子科技大学 | Optical fiber ground seismic wave detection method and system |
-
2021
- 2021-06-29 CN CN202110725770.2A patent/CN113448016A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000018981A (en) * | 1998-06-30 | 2000-01-21 | Mitsubishi Heavy Ind Ltd | Optical fiber sensor |
| JP2000097647A (en) * | 1998-09-28 | 2000-04-07 | Ohbayashi Corp | Method for measuring deformation of structure using optical fiber and optical fiber sensor |
| JP2001281082A (en) * | 2000-03-29 | 2001-10-10 | Hitachi Cable Ltd | Seepage line distribution sensor |
| CN101865665A (en) * | 2010-04-06 | 2010-10-20 | 西安金和光学科技有限公司 | Measurement device and method of optical fiber bending parameter |
| CN110703316A (en) * | 2019-10-23 | 2020-01-17 | 电子科技大学 | Optical fiber ground seismic wave detection method and system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114674349A (en) * | 2022-03-14 | 2022-06-28 | 麒盛科技股份有限公司 | Monitoring device based on optical fiber microbend |
| CN114674349B (en) * | 2022-03-14 | 2024-06-04 | 麒盛科技股份有限公司 | Monitoring device based on optical fiber microbending |
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Application publication date: 20210928 |