CN115236793A - Anti-bending hollow anti-resonance optical fiber - Google Patents
Anti-bending hollow anti-resonance optical fiber Download PDFInfo
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- CN115236793A CN115236793A CN202210724644.XA CN202210724644A CN115236793A CN 115236793 A CN115236793 A CN 115236793A CN 202210724644 A CN202210724644 A CN 202210724644A CN 115236793 A CN115236793 A CN 115236793A
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- optical fiber
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- fiber cladding
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 117
- 238000005452 bending Methods 0.000 title abstract description 37
- 238000005253 cladding Methods 0.000 claims abstract description 74
- 239000000835 fiber Substances 0.000 claims abstract description 54
- 239000010453 quartz Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 5
- 239000005383 fluoride glass Substances 0.000 claims description 3
- 239000005368 silicate glass Substances 0.000 claims description 3
- 239000002203 sulfidic glass Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000004891 communication Methods 0.000 abstract description 6
- 238000012681 fiber drawing Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02319—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by core or core-cladding interface features
- G02B6/02323—Core having lower refractive index than cladding, e.g. photonic band gap guiding
- G02B6/02328—Hollow or gas filled core
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- Physics & Mathematics (AREA)
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- Optics & Photonics (AREA)
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Abstract
The invention discloses a bending-resistant hollow anti-resonance optical fiber, which comprises a first optical fiber cladding, a second optical fiber cladding and an optical fiber supporting part, wherein the first optical fiber cladding is provided with a first optical fiber core; the first optical fiber cladding and the second optical fiber cladding are positioned inside the optical fiber supporting part; the optical fiber supporting portion has air inside; the first optical fiber cladding is formed by nesting and combining two circular structures; the second optical fiber cladding is of a tile-shaped structure; the first optical fiber cladding and the second optical fiber cladding are in contact with each other; the second optical fiber cladding and the optical fiber supporting part are contacted with each other; the first optical fiber cladding and the optical fiber supporting portion are in contact with each other; the groups of first fiber cladding layers and second fiber cladding layers are alternately arranged into a multi-angular star state. The invention has the advantages of simple structure, easy realization on the aspect of optical fiber drawing process and the like, ensures the low loss, bending resistance and low bending loss of the optical fiber, reduces the bending loss of the hollow optical fiber, firmly fixes the cladding structure of the optical fiber by the quartz tile, and provides support for the application of the hollow anti-resonance optical fiber in the aspects of communication, sensing, laser transmission and the like.
Description
Technical Field
The invention relates to the technical field of micro-structural optical fibers, in particular to a bending-resistant hollow anti-resonance optical fiber.
Background
Since the birth of hollow-core anti-resonance optical fiber in 2011, people have a higher enthusiasm for researching the hollow-core optical fiber, the application prospect of the hollow-core optical fiber is full of confidence, the hollow-core optical fiber is considered as a powerful competitor of the next generation of communication optical fiber, the record of the research on the low-loss hollow-core optical fiber is continuously refreshed, the minimum loss of the low-loss hollow-core optical fiber is reduced to 0.174dB/km, the loss of the quartz optical fiber is basically close to the standard 0.142dB/km, and a foundation is laid for the application of the low-loss hollow-core optical fiber. At present, the transmission capacity of a single-core single-mode optical fiber is close to the Shannon transmission limit of 100Tb/s, and with the rapid development of 5G and the Internet +, the transmission capacity of the single-core optical fiber cannot meet the commercial requirements of modern communication networks. In order to realize low loss of the hollow-core optical fiber, scientists in various countries around the world have proposed hollow-core anti-resonance optical fibers with different structures, such as nested hollow-core anti-resonance optical fibers, single-ring hollow-core anti-resonance optical fibers, conjoined tubular hollow-core anti-resonance optical fibers, mixed structure type hollow-core anti-resonance optical fibers and Bragg hollow-core anti-resonance optical fibers, which have advantages, such as low loss, low dispersion, low nonlinearity, low time delay and the like, and play a role in different fields and are widely applied. However, the influence of bending on the hollow anti-resonant fiber is large at present, and is a main factor limiting the development and application of the hollow anti-resonant fiber.
The hollow anti-resonance optical fiber has the characteristics of low loss, low nonlinearity, low time delay, low dispersion and the like due to the unique light guide characteristic, and is considered as the most potential competitor of the next generation communication optical fiber, but the hollow anti-resonance optical fiber has the problems of large optical fiber bending loss, easy energy leakage, difficult long-distance optical fiber drawing and the like.
Disclosure of Invention
In view of the above, the invention provides an anti-bending hollow anti-resonance optical fiber, which has the advantages of low optical fiber loss, bending resistance, simple preparation process and the like, and effectively solves the problems of large bending loss and difficult long-distance optical fiber drawing of the conventional hollow anti-resonance optical fiber.
The invention solves the problems through the following technical means:
a bend-resistant hollow anti-resonant optical fiber includes a first fiber cladding, a second fiber cladding, and a fiber support portion;
the first and second fiber claddings being located inside the fiber support portion;
the optical fiber supporting portion has air inside;
the first optical fiber cladding is formed by nesting and combining two circular structures;
the second optical fiber cladding is of a tile-shaped structure;
the first optical fiber cladding layer and the second optical fiber cladding layer are in contact with each other; the second optical fiber cladding and the optical fiber supporting part are contacted with each other; the first optical fiber cladding and the optical fiber supporting portion are in contact with each other;
the groups of first fiber cladding layers and second fiber cladding layers are alternately arranged into a multi-angular star state.
Further, the materials of the first fiber cladding, the second fiber cladding and the fiber support portion are quartz, silicate glass, sulfide glass or fluoride glass.
Further, the two circular structures of the first fiber cladding are the same in thickness.
Further, the thickness of the second fiber cladding is the same as the thickness of the two circular structures of the first fiber cladding.
Further, the first fiber cladding and the second fiber cladding are arranged in 3, 4, 5, 6, 7, 8, 9 or 10 groups.
Compared with the prior art, the invention has the beneficial effects that at least:
compared with the conventional hollow anti-resonance optical fiber, the anti-bending hollow anti-resonance optical fiber has the advantages of simple structure, easy realization in an optical fiber drawing process and the like, can ensure the low loss, bending resistance and low bending loss of the optical fiber, reduce the bending loss of the hollow optical fiber, firmly fix the cladding structure of the optical fiber by the special structure of the anti-bending quartz tile, and can draw the long-distance hollow anti-resonance optical fiber, and the optical fiber structure provides support for the application of the hollow anti-resonance optical fiber in the aspects of communication, sensing, laser transmission and the like.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of a bend-resistant hollow-core antiresonant optical fiber according to the present invention;
FIG. 2 is a schematic structural diagram of a nested hollow-core antiresonant optical fiber;
FIG. 3 is a graph of bending loss of a nested hollow anti-resonant fiber with a bending radius of 10cm along an x-axis; wherein FIG. 3 (a) is a bending to + x-axis, and FIG. 3 (b) is a bending to-x-axis;
FIG. 4 is a block diagram of a bend resistant hollow anti-resonant fiber designed in accordance with the present invention;
FIG. 5 is a graph of bending loss of a bend-resistant hollow-core antiresonant fiber of the present invention at a bend radius of 10cm along the x-axis, where FIG. 5 (a) is a bend toward the + x-axis and FIG. 5 (b) is a bend toward the-x-axis.
Description of the reference numerals:
1. a first fiber cladding; 2. a second optical fiber cladding; 3. a fiber support portion.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.
As shown in fig. 1, the bending-resistant hollow anti-resonant fiber of the present invention mainly includes three parts, which are a first fiber cladding 1 and a second fiber cladding 2, respectively, and a fiber support part 3; in the figure, the white area is air and the black area is quartz. The first optical fiber cladding 1 is composed of two circular quartz rings, the second optical fiber cladding 2 is a quartz tile, and the whole optical fiber structure is of an integral structure composed of 5 groups of the second optical fiber cladding 1 and the second optical fiber cladding 2.
The first optical fiber cladding 1 is formed by nesting and combining two circular quartz, the thickness of the quartz pulse area is consistent, and the second optical fiber cladding 2 is made of quartz tiles, and the thickness of the second optical fiber cladding 2 is the same as that of the first optical fiber cladding 1.
In fig. 1, the first optical fiber cladding 1, the second optical fiber cladding 2, and the optical fiber support portion 3 are made of quartz material, and are not limited to quartz material, but may be made of other materials such as silicate glass, sulfide glass, fluoride glass, and the like.
In fig. 1, the optical fiber is formed by alternately arranging the first fiber cladding 1 and the second fiber cladding 2 in a pentagram arrangement, but the present invention is not limited to 5 groups, and the arrangement may be 3 groups, 4 groups, 6 groups, 7 groups, 8 groups, 9 groups, 10 groups.
In fig. 1, a first fiber cladding 1 and a second fiber cladding 2 of the optical fiber are in contact with each other, the second fiber cladding 2 is in contact with a fiber supporting portion 3, and the first fiber cladding 1 and the fiber supporting portion 3 are in contact with each other to form a supporting structure, so that structural stability is maintained, and stability of a drawing process of an optical fiber preform is maintained.
The invention designs a five-hole bending-resistant hollow anti-resonance optical fiber, and in order to illustrate the bending resistance of the structure, the performance of the designed optical fiber structure is compared with that of the traditional hollow anti-resonance optical fiber. Fig. 2 is a nested hollow-core antiresonant optical fiber, fig. 3 is a bending loss graph of the structure shown in fig. 2 at a bending radius of 10cm, fig. 4 is a bending-resistant hollow-core antiresonant optical fiber of the present invention, and fig. 5 is a bending loss graph of the present invention. From a comparison of fig. 3 and 5, the fiber bend loss of the inventive design is 2 orders of magnitude lower than that of the conventional hollow core anti-resonant fiber.
The bending-resistant hollow anti-resonance optical fiber designed by the invention is mainly used for long-distance communication, sensing, high-power laser transmission and the like. The existing hollow anti-resonant optical fiber has the defects of large bending loss, difficult long-distance optical fiber drawing and extremely easy bending influence on transmission characteristics. The anti-bending hollow anti-resonance optical fiber mainly comprises a supporting tube, an inner cladding tube and an anti-bending quartz tile, wherein the inner cladding tube and the anti-bending quartz tile are supported at two points on the cross section and are mutually supported, so that the structural stability in the optical fiber drawing process is ensured, and meanwhile, the anti-bending quartz tile can reduce the possibility that the energy of a fiber core is leaked to the cladding when the optical fiber is bent, and the bending loss of the optical fiber is greatly reduced.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (5)
1. A bend-resistant hollow anti-resonant optical fiber comprising a first fiber cladding, a second fiber cladding and a fiber support portion;
the first and second fiber claddings being located inside the fiber support portion;
the optical fiber supporting portion has air inside;
the first optical fiber cladding is formed by nesting and combining two circular structures;
the second optical fiber cladding is of a tile-shaped structure;
the first optical fiber cladding layer and the second optical fiber cladding layer are in contact with each other; the second optical fiber cladding and the optical fiber supporting portion are in contact with each other; the first optical fiber cladding and the optical fiber supporting portion are in contact with each other;
and the groups of the first optical fiber cladding layers and the second optical fiber cladding layers are alternately arranged into a multi-angle star state.
2. The bend-resistant hollow-core antiresonant optical fiber of claim 1, wherein the materials of the first fiber cladding, the second fiber cladding, and the fiber support portion are quartz, silicate glass, sulfide glass, or fluoride glass.
3. The bend-resistant hollow-core antiresonant optical fiber of claim 1, wherein the two circular structures of the first fiber cladding are the same thickness.
4. The bend-resistant hollow-core antiresonant fiber of claim 1, wherein the thickness of the second fiber cladding is the same as the thickness of the two circular structures of the first fiber cladding.
5. The bend-resistant hollow-core antiresonant fiber of claim 1, wherein the first fiber cladding and the second fiber cladding are arranged in 3, 4, 5, 6, 7, 8, 9 or 10 groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210724644.XA CN115236793A (en) | 2022-06-23 | 2022-06-23 | Anti-bending hollow anti-resonance optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210724644.XA CN115236793A (en) | 2022-06-23 | 2022-06-23 | Anti-bending hollow anti-resonance optical fiber |
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| CN115236793A true CN115236793A (en) | 2022-10-25 |
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| CN202210724644.XA Pending CN115236793A (en) | 2022-06-23 | 2022-06-23 | Anti-bending hollow anti-resonance optical fiber |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807363A (en) * | 2016-05-13 | 2016-07-27 | 北京工业大学 | Hollow anti-resonance optical fiber |
| CN106575012A (en) * | 2014-06-06 | 2017-04-19 | 南安普敦大学 | Hollow-core optical fibers |
| CN110579836A (en) * | 2019-07-31 | 2019-12-17 | 江西师范大学 | Multi-resonance-layer hollow optical fiber |
| CN111095059A (en) * | 2017-09-13 | 2020-05-01 | 南安普敦大学 | Antiresonant hollow core preform and optical fiber and method of manufacture |
| US20200326473A1 (en) * | 2019-04-10 | 2020-10-15 | IRflex Corporation | Hollow-core fiber with anti-resonant arches and method of manufacturing thereof |
| WO2020209854A1 (en) * | 2019-04-10 | 2020-10-15 | IRflex Corporation | Hollow-core fiber with anti-resonant arches and method of manufacturing thereof |
| CN111999800A (en) * | 2020-09-24 | 2020-11-27 | 上海交通大学 | Negative curvature anti-resonance hollow optical fiber |
| CN113514919A (en) * | 2021-03-04 | 2021-10-19 | 华南师范大学 | Braille-lattice hollow anti-resonance optical fiber |
-
2022
- 2022-06-23 CN CN202210724644.XA patent/CN115236793A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106575012A (en) * | 2014-06-06 | 2017-04-19 | 南安普敦大学 | Hollow-core optical fibers |
| CN105807363A (en) * | 2016-05-13 | 2016-07-27 | 北京工业大学 | Hollow anti-resonance optical fiber |
| CN111095059A (en) * | 2017-09-13 | 2020-05-01 | 南安普敦大学 | Antiresonant hollow core preform and optical fiber and method of manufacture |
| US20200326473A1 (en) * | 2019-04-10 | 2020-10-15 | IRflex Corporation | Hollow-core fiber with anti-resonant arches and method of manufacturing thereof |
| WO2020209854A1 (en) * | 2019-04-10 | 2020-10-15 | IRflex Corporation | Hollow-core fiber with anti-resonant arches and method of manufacturing thereof |
| CN110579836A (en) * | 2019-07-31 | 2019-12-17 | 江西师范大学 | Multi-resonance-layer hollow optical fiber |
| CN111999800A (en) * | 2020-09-24 | 2020-11-27 | 上海交通大学 | Negative curvature anti-resonance hollow optical fiber |
| CN113514919A (en) * | 2021-03-04 | 2021-10-19 | 华南师范大学 | Braille-lattice hollow anti-resonance optical fiber |
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Application publication date: 20221025 |