CN103852089A - Plastic optical fiber sensor with multi-tapered hole bent structure - Google Patents
Plastic optical fiber sensor with multi-tapered hole bent structure Download PDFInfo
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- CN103852089A CN103852089A CN201410123666.6A CN201410123666A CN103852089A CN 103852089 A CN103852089 A CN 103852089A CN 201410123666 A CN201410123666 A CN 201410123666A CN 103852089 A CN103852089 A CN 103852089A
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Abstract
The invention belongs to the technical field of optical sensing, and in particular relates to a plastic optical fiber sensor with a multi-tapered hole bent structure. Tapered micropores are formed in a plastic optical fiber with the multi-tapered hole bent structure; the axes of the tapered micropores are intersected with the central axis of the optical fiber in a perpendicular manner; the taper bottom centers of all the tapered micropores are positioned on one generatrix of the optical fiber; the generatrix in which the taper bottoms are located is arranged on the outer side of the arced bent structure. As the tapered micropores can be machined by using a femtosecond laser technique, the plastic optical fiber sensor has the advantages of convenience in machining, simple structure, low cost, high sensitivity, rapid response and the like. By adopting the plastic optical fiber sensor, the high-precision measurement based on a plastic optical fiber bending consumption mechanism is achieved.
Description
Technical field
The invention belongs to the technical field of Fibre Optical Sensor, particularly relate to a kind of plastic optical fiber sensor of many taper holes warp architecture.
Background technology
Based on fibre-optical bending, realize the structure of physical quantity to external world and mainly contain at present: directly bending, fiber grating and various interference structures etc.Although above structure all has sensitivity characteristic for bending, all there is inherent defect or deficiency in these structures: the direct bending frangibility of glass optical fiber; The direct bend-insensitive of plastic optical fiber; The manufacture craft of various gratings and interference structure requires high, and difficulty of processing is large, and measuring system cost is very high.
Plastic optical fiber light weight, softness, more resistance to destruction (vibration and bending).Plastic optical fiber has excellent pulling strengrth, durability and the little feature that takes up room.In addition, the junction loss of plastic optical fiber is little, is easy to processing.Above feature makes plastic optical fiber be with a wide range of applications at sensory field, but common plastics optical fiber is extremely insensitive for bending, makes to utilize the bending loss of plastic optical fiber to realize very difficulty of high-precision sensor measuring.Therefore the plastic optical fiber structure that, development has a bending sensitivity characteristic is significant.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes common plastics optical fiber and cannot utilize bending loss characteristics to realize the shortcoming of high-precision sensing, and a kind of many taper holes plastic optical fiber warp architecture with bending sensitivity characteristic is provided.
Above-mentioned technical matters realizes by following technical scheme:
A kind of many taper holes warp architecture plastic optical fiber sensor, it is characterized in that, on the plastic optical fiber with arc-shaped bend structure, be arranged with conical micropore, the conical axis of micropore and the central shaft of optical fiber intersect vertically, all conical micropore Zhui Di center is on the same bus of optical fiber, and the bus at place, Qie Zhuidi center is in the outside of the arc of described arc-shaped bend structure.
Described plastic optical fiber can be various standard-sized step multimode plastic optical fibers.
Preferably 10 microns～500 microns of the cone bottom diameters of described conical micropore; Preferably 0.5 millimeter～1 millimeter of center distance at the bottom of the cone of adjacent conical micropore.
When the quantity of described tapered micro holes is more than or equal to 10, experiment shows better effects if.
Beneficial effect:
Many taper holes of the present invention warp architecture plastic optical fiber sensor, has simple in structurely, with low cost, highly sensitive, and the advantage such as be swift in response.The invention enables the high-precision sensing measurement based on plastic optical fiber bending loss mechanism to be achieved.
Brief description of the drawings
Fig. 1 is the schematic side view of many taper holes of the present invention warp architecture plastic optical fiber sensor.
Fig. 2 is the schematic top plan view of many taper holes of the present invention warp architecture plastic optical fiber sensor.
Fig. 3 is bellmouth schematic diagram of the present invention.
Fig. 4 is the bending loss experimental provision schematic diagram used that the embodiment of the present invention is tested many taper holes plastic optical fiber and ordinary optic fibre.
Fig. 5 is many taper holes plastic optical fiber of recording in the embodiment of the present invention and the bending loss figure of ordinary optic fibre.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Optical fiber used is the step multimodal polymer optical fiber that MIT produces, and concrete model is ESKA-CK40, and the overall diameter of optical fiber is 1.00mm, and core diameter is 0.96mm, and fibre core is made up of polymethylmethacrylate, and fiber core refractive index is 1.492; Cladding thickness is 0.02mm, and covering is made up of fluororesin, and cladding index is 1.417; Numerical aperture NA=0.467, loss is 200dB/km, the normal working temperature of optical fiber is-55 DEG C-70 DEG C.
Utilize 800nm femtosecond laser on above-mentioned plastic optical fiber, to get 13 bellmouths, each bellmouth axis is parallel, and all intersect vertically with optical fiber axis, the axial line distance in adjacent conical hole is 0.5mm, cone bottom diameter 150um, all on the same bus of optical fiber, cone point does not penetrate the covering of optical fiber opposite side at the cone end, produces the plastic optical fiber of 13 taper holes; Again the perforated zone of plastic optical fiber is wound around and bends to arc, and make the cone bottom of conical micropore in the outside of arc.
As Fig. 4, beat bellmouth plastic optical fiber and be connected with photodetector with light source respectively by coupling mechanism, be less than 0.5dB through measuring coupling device plug loss.The taper porose area of plastic optical fiber is wrapped on cylinder, changes cylindrical radius to change the flexibility of bellmouth plastic optical fiber, record data computed losses, with the situation of change of bending radius, the results are shown in Figure 5.
On the basis of embodiment 1, change bellmouth distance between axles into 1.0mm, other parameter constant, test loss, with the situation of change of bending radius, the results are shown in Figure 5.
On the basis of embodiment 1, change bellmouth quantity into 20, other parameter constant, test loss, with the situation of change of bending radius, the results are shown in Figure 5.
On the basis of embodiment 2, change bellmouth quantity into 20, other parameter constant, test loss, with the situation of change of bending radius, the results are shown in Figure 5.
Select a plastic optical fiber that parameter is identical with embodiment 1, but do not punch, test the situation of change of loss with bending radius by the method for testing of embodiment 1, the results are shown in Figure 5.
Comparative example 1～5, and visible common plastics optical fiber is extremely insensitive for bending, and the warp architecture of many taper holes plastic optical fiber is very responsive for bending.From experimental example, in the time that bending radius changes to 0.6cm from 7.5cm, the common plastics fibre loss of punching has not changed about 2dB, and the loss of many bellmouths plastic optical fiber has changed nearly 20dB, the loss of visible many taper holes of the present invention warp architecture plastic optical fiber sensor is very responsive to the variation of bending radius, and the quantity in hole is more, and effect is more obvious.Can measure the various physical quantitys that can cause bending radius of the present invention to change according to the loss characteristic of plastic optical fiber, as quality, pressure, temperature etc.
Claims (4)
1. the plastic optical fiber of taper hole warp architecture more than kind sensor, it is characterized in that, on the plastic optical fiber with arc-shaped bend structure, be arranged with conical micropore, the conical axis of micropore and the central shaft of optical fiber intersect vertically, all conical micropore Zhui Di center is on the same bus of optical fiber, and the bus at place, Qie Zhuidi center is in the outside of the arc of described arc-shaped bend structure.
2. many taper holes of one warp architecture plastic optical fiber sensor according to claim 1, is characterized in that, described plastic optical fiber is step multimode plastic optical fiber.
3. many taper holes of one warp architecture plastic optical fiber sensor according to claim 1 and 2, is characterized in that, the cone bottom diameter of described conical micropore is 10 microns～500 microns; At the bottom of the cone of adjacent conical micropore, center distance is 0.5 millimeter～1 millimeter.
4. many taper holes of one warp architecture plastic optical fiber sensor according to claim 1 and 2, is characterized in that, the quantity of described tapered micro holes is more than or equal to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410123666.6A CN103852089B (en) | 2014-03-29 | 2014-03-29 | Plastic optical fiber sensor with multi-tapered hole bent structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410123666.6A CN103852089B (en) | 2014-03-29 | 2014-03-29 | Plastic optical fiber sensor with multi-tapered hole bent structure |
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| CN103852089A true CN103852089A (en) | 2014-06-11 |
| CN103852089B CN103852089B (en) | 2017-02-15 |
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Citations (7)
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| CN1395680A (en) * | 2000-01-21 | 2003-02-05 | 斯托.伍德沃德公司 | Flexible fiber optic microbend device, sensors and method of use |
| CN101109663A (en) * | 2007-08-09 | 2008-01-23 | 中国科学院长春光学精密机械与物理研究所 | Optical fiber temperature sensor based on bending loss |
| CN102235884A (en) * | 2010-04-27 | 2011-11-09 | 西安金和光学科技有限公司 | Spiral optical fiber sensing device based on bending deformation of optical fiber |
| CN102378927A (en) * | 2009-03-31 | 2012-03-14 | 东丽株式会社 | Plastic optical fiber and plastic optical fiber code |
| CN202329571U (en) * | 2011-12-02 | 2012-07-11 | 中铁二院工程集团有限责任公司 | Fiber bragg grating curvature sensor for monitoring stress deformation of flexible protective screening |
| CN103105652A (en) * | 2011-11-11 | 2013-05-15 | 西安金和光学科技有限公司 | Plastic optical fiber |
| US20130188915A1 (en) * | 2010-09-13 | 2013-07-25 | Asahi Glass Company, Limited | Plastic optical fiber unit and plastic optical fiber cable using same |
-
2014
- 2014-03-29 CN CN201410123666.6A patent/CN103852089B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1395680A (en) * | 2000-01-21 | 2003-02-05 | 斯托.伍德沃德公司 | Flexible fiber optic microbend device, sensors and method of use |
| CN101109663A (en) * | 2007-08-09 | 2008-01-23 | 中国科学院长春光学精密机械与物理研究所 | Optical fiber temperature sensor based on bending loss |
| CN102378927A (en) * | 2009-03-31 | 2012-03-14 | 东丽株式会社 | Plastic optical fiber and plastic optical fiber code |
| CN102235884A (en) * | 2010-04-27 | 2011-11-09 | 西安金和光学科技有限公司 | Spiral optical fiber sensing device based on bending deformation of optical fiber |
| US20130188915A1 (en) * | 2010-09-13 | 2013-07-25 | Asahi Glass Company, Limited | Plastic optical fiber unit and plastic optical fiber cable using same |
| CN103105652A (en) * | 2011-11-11 | 2013-05-15 | 西安金和光学科技有限公司 | Plastic optical fiber |
| CN202329571U (en) * | 2011-12-02 | 2012-07-11 | 中铁二院工程集团有限责任公司 | Fiber bragg grating curvature sensor for monitoring stress deformation of flexible protective screening |
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| 付宜利 等: ""弯曲增敏型光纤曲率传感器的优化分析"", 《光电子 激光》 * |
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