CN103163588A - Double fiber core plastic optical fiber - Google Patents
Double fiber core plastic optical fiber Download PDFInfo
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- CN103163588A CN103163588A CN 201110427100 CN201110427100A CN103163588A CN 103163588 A CN103163588 A CN 103163588A CN 201110427100 CN201110427100 CN 201110427100 CN 201110427100 A CN201110427100 A CN 201110427100A CN 103163588 A CN103163588 A CN 103163588A
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- fibre core
- optical fiber
- covering
- plastic optical
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Abstract
The invention discloses a double fiber core plastic optical fiber which comprises a first cladding and a second cladding which is positioned on the outer side of the first cladding. A first fiber core and a second fiber core are placed side by side inside the first cladding. The refractive index of the first fiber core and the second fiber core is larger than that of the first cladding, and the refractive index of the first cladding is larger than that of the second refractive index. A protection layer is arranged on the outer side of the second cladding, and at least one of the first cladding and the second cladding is made of high polymer materials. The double fiber core plastic optical fiber has the advantages of being convenient to use, low in cost and good in application prospect.
Description
Technical field
The present invention relates to a kind of plastic optical fiber, particularly relate to a kind of pair of fibre core plastic optical fiber.
Background technology
The optical fiber perimeter sensing and monitoring system is a kind of emerging safety-protection system, it has anti-electromagnetic interference (EMI), the multiple advantages such as monitoring distance is long, adopt the large percentage of fiber optic interferometric method at present optical fiber perimeter sensing and monitoring system, it has the advantages that rate of failing to report is low, precision is high, but its station-keeping ability is poor and rate of false alarm is higher, has had a strong impact on it and has applied.The optical fiber micro-bending sensing device with respect to fiber optic interferometric have advantages of that cost is low, can locate, rate of false alarm is low, but its enclosure wall in circumference or railing are combined difficulty, practical application is very limited, subject matter is that existing little curved sensing device is still to adopt common telecommunication optical fiber as main, what common telecommunication optical fiber adopted on structural design is the structure that reduces as much as possible microbending loss, and this and optical fiber micro-bending sensing device need sensitive sensing little curved be conflicting mutually.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art, a kind of pair of fibre core plastic optical fiber is provided.That this optical fiber has is easy to use, cost is low, has application prospect preferably.
For achieving the above object; the technical solution used in the present invention is: a kind of pair of fibre core plastic optical fiber; it is characterized in that: comprise covering one and the covering two that is positioned at covering one outside; be mounted with side by side fibre core one and fibre core two in covering one; the refractive index of described fibre core one and fibre core two is greater than the refractive index of covering one, and the refractive index of covering one is greater than the refractive index of covering two, is protective seams in covering two outsides; wherein, covering one and covering two at least one be to be consisted of by macromolecular material.
A kind of pair of above-mentioned fibre core plastic optical fiber is characterized in that: described fibre core one or fibre core two are to consist of by silica-based glass or doped with the silica-based glass material of germanium, boron element.
A kind of pair of above-mentioned fibre core plastic optical fiber is characterized in that: described fibre core one and fibre core two are to be made of transparent macromolecular material.
A kind of pair of above-mentioned fibre core plastic optical fiber is characterized in that: be added with fluorescent material in described covering one.
A kind of pair of above-mentioned fibre core plastic optical fiber is characterized in that: described macromolecular material is organic glass, fluoroplastic.
A kind of pair of above-mentioned fibre core plastic optical fiber is characterized in that, described fluorescent material is cumarin or rhodamine class or rare earth metal complex material.
A kind of pair of above-mentioned fibre core plastic optical fiber is characterized in that the refractive index of described fibre core one is higher than the refractive index of fibre core two.
A kind of pair of above-mentioned fibre core plastic optical fiber is characterized in that the external diameter of described fibre core one is greater than the external diameter of fibre core two.
A kind of pair of above-mentioned fibre core plastic optical fiber is characterized in that described fibre core one and fibre core two are placed in covering one with spiral form.
A kind of pair of above-mentioned fibre core plastic optical fiber is characterized in that described fibre core one is positioned on the central shaft of optical fiber, and described fibre core two or fibre core two parallel with fibre core one settled around fibre core one spiral.
The present invention compared with prior art has the following advantages:
1, inject light signal at of the present invention pair of fibre core plastic optical fiber end face, fibre core one, fibre core two, covering one, covering two is interior all light signal, but through shorter transmission range, light signal partial coupling in covering one enters fibre core one, partial coupling enters fibre core two, and the light signal partial coupling in covering two enters covering two, the protective seam that part enters optical fiber dissipates, so transmission of the light signal president distance in fibre core one and fibre core two, and the light signal in fibre core one and fibre core two can keep relative stability, changing appears in one place when optical fiber, as crooked or little when curved, cause the light signal in fibre core one and fibre core two to be redistributed, by just monitoring this variation at two doped core optical fibers end arrangement checkout equipment, can further calculate by light signal and the relation of time that changes the position that variation occurs, reach the purpose of distributed monitoring.
If 2, be added with fluorescent material in covering one, and only inject light signal at one of fibre core one or fibre core two, do not inject the fibre core of light signal in the monitoring of the optical fiber other end, if there is fluorescence signal to occur, illustrate on optical fiber and change, as crooked or little situation such as curved, by settling checkout equipment just can monitor this variation in two doped core optical fibers ends.
3, the plastics twin-core fiber has convenient processing and manufacture with respect to the twin-core fiber of full quartz glass substrate, and low cost and other advantages is suitable for short-range application.
4, because macromolecular material has higher coefficient of linear thermal expansion, so when temperature variation, want large one or two order of magnitude as the fibre core one of the transmission channel of main light signal and the variation of the more full quartz glass of variable in distance between fibre core two, on the transmission of light signal wherein with redistribute and have larger impact; Based on same principle, the density of plastic optical fiber also has larger variation, and this has larger advantage for it is applied to temperature sensing.
5, plastic optical fiber has larger tensile elongation, and this provides the foundation as the strain sensing device for it.
In sum, optical fiber structure of the present invention is simple, cost is low, purposes is wide, can be used for realizing the purpose of distributed or quasi-distributed monitoring sensing, has market outlook preferably.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation of the xsect of optical fiber of the present invention.
Fig. 2 is the structural representation of optical fiber of the present invention index distribution radially.
Description of reference numerals:
1-fibre core one; 2-fibre core two; 3-covering one;
4-covering two; The 5-protective seam.
Embodiment
A kind of pair of fibre core plastic optical fiber as depicted in figs. 1 and 2; comprise covering 1 and the covering 24 that is positioned at covering one 3 outsides; be mounted with side by side fibre core 1 and fibre core 22 in covering 1; the refractive index of described fibre core 1 and fibre core 22 is greater than the refractive index of covering 1; the refractive index of covering 1 is greater than the refractive index of covering 24, is protective seams 5 in covering 24 outsides.
inject light signal at two doped core optical fiber end faces, fibre core 1, fibre core 22, covering 1, covering 24 is interior all light signal, but through shorter transmission range, light signal partial coupling in covering 1 enters fibre core 1, partial coupling enters fibre core 22, and the light signal partial coupling in covering 24 enters covering 22, the protective seam 5 that part enters optical fiber dissipates, so transmission of the light signal president distance in fibre core 1 and fibre core 22, and the light signal in fibre core 1 and fibre core 22 can keep relative stability, when optical fiber somewhere appearance changes, as crooked or little when curved, cause the light signal in fibre core 1 and fibre core 22 to be redistributed, by just monitoring this variation at two doped core optical fibers end arrangement checkout equipment, can further calculate by light signal and the relation of time that changes the position that variation occurs, reach the purpose of distributed monitoring.
preferably, the refractive index of described fibre core 1 is higher than the refractive index of fibre core 22, the constraint of one 1 pairs of light signals of fibre core is higher than the constraint of fibre core 22 light signals, be under identical variation at optical fiber, the part optical signals of fibre core 22 interior transmission is coupled into fibre core 1, thereby cause, the relative variation of the light signal strength in fibre core 1 and fibre core 22, by just monitoring this variation at two doped core optical fibers end arrangement checkout equipment, can further calculate by light signal and the relation of time that changes the position that variation occurs, reach the purpose of distributed monitoring.
Preferably, described fibre core 1 or fibre core 22 are to consist of by silica-based glass or doped with the silica-based glass material of germanium, boron element.Described silica-based glass is quartz glass.
Preferably, described fibre core 1 and fibre core 22 are to be made of transparent macromolecular material.
Preferably, be added with fluorescent material in described covering 1.
Preferably, described macromolecular material is organic glass, fluoroplastic.Fluoroplastic can be perfluoroethylene-propylenes.
Preferably, described fluorescent material is cumarin or rhodamine class or rare earth metal complex material.
Preferably, the refractive index of described fibre core 1 is higher than the refractive index of fibre core 22.
Preferably, the external diameter of described fibre core 1 is greater than the external diameter of fibre core 22.
Preferably, described fibre core 1 and fibre core 22 are placed in covering 1 with spiral form.
Preferably, described fibre core 1 is positioned on the central shaft of optical fiber, and described fibre core 22 is parallel with fibre core one.
Preferably, described fibre core 1 is positioned on the central shaft of optical fiber, and described fibre core 22 is settled around fibre core one 1 spirals.
The above; it is only preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, every according to the technology of the present invention essence to any simple modification, change and equivalent structure transformation that above embodiment does, all still belong in the protection domain of technical solution of the present invention.
Claims (10)
1. two fibre core plastic optical fiber, it is characterized in that: comprise covering one (3) and be positioned at the covering two (4) in covering one (3) outside, be mounted with side by side fibre core one (1) and fibre core two (2) in covering one (3), the refractive index of described fibre core one (1) and fibre core two (2) is greater than the refractive index of covering one (3), the refractive index of covering one (3) is greater than the refractive index of covering two (4), protective seam (5) outside covering two (4), wherein, at least one is to be made of macromolecular material for covering one (3) and covering two (4).
2. a kind of pair of fibre core plastic optical fiber according to claim 1 is characterized in that: described fibre core one (1) or fibre core two (2) are to consist of by silica-based glass or doped with the silica-based glass material of germanium, boron element.
3. a kind of pair of fibre core plastic optical fiber according to claim 1, it is characterized in that: described fibre core one (1) and fibre core two (2) are to be made of transparent macromolecular material.
4. a kind of pair of fibre core plastic optical fiber according to claim 1, is characterized in that: be added with fluorescent material in described covering one (3).
5. according to claim 1 or 3 described a kind of pair of fibre core plastic optical fibers, it is characterized in that: described macromolecular material is organic glass, fluoroplastic.
6. a kind of pair of fibre core plastic optical fiber according to claim 4, is characterized in that, described fluorescent material is cumarin or rhodamine class or rare earth metal complex material.
7. a kind of pair of fibre core plastic optical fiber according to claim 1, is characterized in that, the refractive index of described fibre core one (1) is higher than the refractive index of fibre core two (2).
8. a kind of pair of fibre core plastic optical fiber according to claim 1, is characterized in that, the external diameter of described fibre core one (1) is greater than the external diameter of fibre core two (2).
9. a kind of pair of fibre core plastic optical fiber according to claim 1, is characterized in that, described fibre core one (1) and fibre core two (2) are placed in covering one (3) with spiral form.
10. a kind of pair of fibre core plastic optical fiber according to claim 1, it is characterized in that, described fibre core one (1) is positioned on the central shaft of optical fiber, and described fibre core two (2) or fibre core two (2) parallel with fibre core one (1) settled around fibre core one (1) spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110427100 CN103163588A (en) | 2011-12-15 | 2011-12-15 | Double fiber core plastic optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110427100 CN103163588A (en) | 2011-12-15 | 2011-12-15 | Double fiber core plastic optical fiber |
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|---|---|
| CN103163588A true CN103163588A (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110427100 Pending CN103163588A (en) | 2011-12-15 | 2011-12-15 | Double fiber core plastic optical fiber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388604A (en) * | 2015-12-22 | 2016-03-09 | 精微视达医疗科技（武汉）有限公司 | Confocal miniature probe having bending alarm function and matching device and detection method thereof |
| CN110720666A (en) * | 2019-07-02 | 2020-01-24 | 昆山联滔电子有限公司 | Aerosol delivery device |
| CN111061002A (en) * | 2019-12-07 | 2020-04-24 | 南京春辉科技实业有限公司 | Plastic fluorescent optical fiber and preparation method thereof |
-
2011
- 2011-12-15 CN CN 201110427100 patent/CN103163588A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388604A (en) * | 2015-12-22 | 2016-03-09 | 精微视达医疗科技（武汉）有限公司 | Confocal miniature probe having bending alarm function and matching device and detection method thereof |
| CN105388604B (en) * | 2015-12-22 | 2018-01-30 | 精微视达医疗科技（武汉）有限公司 | A kind of copolymerization Jiao miniature probe and its corollary apparatus and detection method with bending warning function |
| CN110720666A (en) * | 2019-07-02 | 2020-01-24 | 昆山联滔电子有限公司 | Aerosol delivery device |
| CN110720666B (en) * | 2019-07-02 | 2022-06-14 | 昆山联滔电子有限公司 | Aerosol delivery device |
| CN111061002A (en) * | 2019-12-07 | 2020-04-24 | 南京春辉科技实业有限公司 | Plastic fluorescent optical fiber and preparation method thereof |
| CN111061002B (en) * | 2019-12-07 | 2024-02-02 | 南京春辉科技实业有限公司 | Plastic fluorescent optical fiber and preparation method thereof |
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Application publication date: 20130619 |