CN110568549A - Multi-core optical fiber based on air hole rod and preparation method thereof - Google Patents
Multi-core optical fiber based on air hole rod and preparation method thereof Download PDFInfo
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 58
- 238000000034 method Methods 0.000 claims abstract description 29
- 239000000835 fiber Substances 0.000 claims description 17
- 238000010309 melting process Methods 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000011049 filling Methods 0.000 claims description 4
- 238000005491 wire drawing Methods 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 21
- 238000010923 batch production Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000004927 fusion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012681 fiber drawing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 239000004038 photonic crystal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
-
- 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
- G02B6/02042—Multicore optical fibres
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention provides an air hole rod-based multi-core optical fiber and a preparation method thereof, and the air hole rod-based multi-core optical fiber is characterized in that: comprises a solid rod, a first hollow rod, a capillary hollow tube and a second hollow rod; the solid rod is provided with a plurality of hollow rods, the hollow rods are evenly distributed in the air hole rod, the first hollow rods are sleeved in the solid rod, the capillary hollow tubes are filled in gaps among the first hollow rods, the diameters of the capillary hollow tubes are different, the second hollow tubes accommodate all the solid rods, the first hollow rods and the capillary hollow tubes, the second hollow tubes are not in direct contact with the first hollow tubes, and a plurality of capillary hollow tubes are filled between the second hollow tubes and the first hollow tubes. In the technical field of optical fiber manufacturing, the problems that the existing multi-core optical fiber manufacturing process cannot realize a complex optical fiber structure and is high in batch production difficulty exist, and the multi-core optical fiber manufacturing process which is simple in process and easy to produce in batches is provided.
Description
Technical Field
the invention relates to the technical field of optical fiber manufacturing, in particular to an air hole rod-based multi-core optical fiber and a preparation method thereof.
Background
With the rapid development of the high-speed information era, the common single-mode optical fiber has gradually failed to meet the requirement of the transmission capacity of the optical fiber system. In recent years, a novel space division multiplexing optical fiber, which is mainly a multicore optical fiber, a few-mode multicore optical fiber, or the like, is a good optical element for solving problems such as limited transmission capacity and nonlinear effect damage in an optical fiber system due to its unique core arrangement and mode field characteristics. The multi-core optical fiber can accommodate a plurality of cores in a limited cladding range, and effectively improves the transmission capacity of a single optical fiber, so that the laying cost of the optical fiber is reduced, and the multi-core optical fiber becomes an indispensable important element in a next-generation optical fiber communication network.
The existing multi-core fiber manufacturing technology mainly comprises the following steps: rod stacking, extrusion, ultrasonic perforation, and die casting. At present, the rod stacking method is mainly applied to the manufacture of multi-core optical fibers. The rod stacking method is to arrange the quartz tube and the capillary tube tightly, to pump out air by vacuum technology, then to melt and draw into the optical fiber prefabricated rod. The arrangement of the quartz rods needs to be uniform without introducing impurities, and the diameter error of the capillary tube needs to be strictly controlled. The multi-core optical fiber perform manufactured by the ultrasonic punching method is a direct method for realizing a complex porous structure, the punching operation of the optical fiber perform can be realized by utilizing the weakening of friction force and pressure between glass during punching through the vibration of sound waves, and then the optical fiber perform is guided into a hole and is fused and contracted to manufacture the multi-core optical fiber perform after being vacuumized. The ultrasonic drilling technique requires precise control of the position, size and angle of the hole, but it can fabricate optical fiber preforms of different structures.
However, the multi-core optical fiber has the following problems in actual manufacturing: firstly, the multicore fiber manufactured by the method similar to the method for manufacturing the photonic crystal fiber, i.e. the rod stacking method, has a certain deviation between the position of the fiber core and the designed position due to the fact that the position of the solid rod cannot be fixed in the rod stacking process, and further has a great influence on the overall performance of the fiber. And the existing rod stacking mode can only manufacture special optical fibers with compact stacking structures and symmetrical structures, and the difficulty is very great for manufacturing complex structures such as large hollow core optical fibers. The optical fiber preform rod manufactured by the rod stacking method has long manufacturing period and cannot be produced in batch. Secondly, the multi-core optical fiber manufactured by adopting the optical fiber perform perforating mode has high requirements on perforating position and abrasive material selection, and the control on perforating frequency and rotating speed needs to be very accurate. On the other hand, the size of the optical fiber preform cannot be too long due to the restriction of the depth of the perforation. Meanwhile, the silica itself has weak tension and bending property, and is required to have no crack along the radius direction in the punching process, otherwise, the production of the optical fiber preform is greatly influenced. Therefore, a simple and easy-to-operate multi-core optical fiber manufacturing technology needs to be designed, so that the performance of the optical fiber preform can meet the design requirements, and the application prospect of mass production needs to be provided.
Disclosure of Invention
In order to overcome the problems that the existing multi-core optical fiber manufacturing process in the prior art cannot realize a complex optical fiber structure and has high difficulty in batch production, the multi-core optical fiber based on the air hole rod is provided, and comprises a solid rod, a first hollow rod, a capillary hollow tube and a second hollow rod; the solid rod is provided with a plurality of hollow rods, the hollow rods are evenly distributed in the air hole rod, the first hollow rods are sleeved in the solid rod, the capillary hollow tubes are filled in gaps among the first hollow rods, the diameters of the capillary hollow tubes are different, the second hollow tubes accommodate all the solid rods, the first hollow rods and the capillary hollow tubes, the second hollow tubes are not in direct contact with the first hollow tubes, and a plurality of capillary hollow tubes are filled between the second hollow tubes and the first hollow tubes.
Preferably, the first hollow rod is sleeved in the solid rod, a vacuum layer is arranged between the solid rod and the first hollow rod, and an air extraction equipment interface is arranged at a node of the multi-core optical fiber between the solid rod and the first hollow rod.
By adopting the technical scheme, the first hollow rod and the solid rod are vacuumized, so that bubbles can be prevented from appearing in the core rod in the subsequent melting process, and the quality of the core rod is improved.
Preferably, the first hollow rods are uniformly distributed in the second hollow rods and are arranged in an axial array mode according to the second hollow rods, the first hollow rods are movably connected with the surrounding capillary hollow tubes in the second hollow rods, and gaps exist among the first hollow rods, the second hollow rods and the capillary hollow tube pipelines.
Through adopting above-mentioned technical scheme, first hollow stick is arranged on the axis of the hollow stick of second, and evenly distributed, and the laminating that can be inseparable at the in-process that melts and contracts, inside plug is difficult for piling up in one side.
Preferably, the first hollow rod and the capillary hollow tubes are densely distributed in the second hollow rod, and gaps among the second hollow rod, the capillary hollow tubes and the first hollow rod are all vacuum layers.
By adopting the technical scheme, the gap departments among the pipelines adopt the vacuum design, and the bubbles in the core rod can be avoided in the melting process.
Preferably, the distribution of the first hollow rod in the second hollow rod is one of a dense symmetrical type, a single ring type, a double ring type and a four-sided type.
By adopting the technical scheme, the first hollow rod adopts a plurality of distribution forms of center stacking, and the regular arrangement of the inner core rods in the process is ensured.
Preferably, the number of the solid rods is in the range of 30-50, and the solid rods and the first hollow rods are in one-to-one correspondence.
By adopting the technical scheme, the more the number of the solid rods is, the lower the mechanical property and the manufacturing reliability of the multi-core optical fiber are, and on the basis of practicability, the maximum fiber core has a certain value in 50 cores.
Preferably, at least 6 capillary hollow tubes are surrounded around the first hollow rod, and there is one and only one solid rod inside the first hollow rod.
By adopting the technical scheme, the capillary hollow tube surrounding the first hollow rod can adjust the effective refractive index between each core rod, thereby reducing the bending loss.
a method for preparing the air-holey-rod-based multi-core optical fiber of claim 1, comprising the following steps, step one: sleeving a plurality of solid rods into the first hollow rod respectively, and vacuumizing a connecting layer between the first hollow rod and the solid rods; step two: placing a first hollow rod and a capillary hollow tube, which are lined with a solid rod, into a second hollow rod, uniformly arranging the first hollow rod according to the axis direction of the second hollow rod, fully filling the capillary hollow tube between the first hollow rod and the second hollow rod, and vacuumizing the gap between the first hollow rod and the second hollow rod; step three: forming a complete multi-core optical fiber perform rod by the second hollow rod, the capillary hollow tube and the first hollow tube by adopting a fusion method; step four: and the complete multicore optical fiber preform is manufactured into a multicore optical fiber through wire drawing and coating.
Preferably, the evacuation process in the first and second steps is performed by evacuating the side walls of the first and second hollow rods by using a vacuum pump.
Preferably, the melting process in the third step is performed in a sealed vacuum environment.
Through adopting above-mentioned technical scheme, adopt the vacuum pump to carry out evacuation processing and the fused environment setting in vacuum environment to the space in the plug, can reduce the bubble that produces with the bottom in the fused in-process.
The beneficial effects of the invention are as follows: the technology for manufacturing the multi-core optical fiber based on the air hole rod can solve the problem that the existing technology for manufacturing the multi-core optical fiber cannot meet the requirement of a complex structure in a mode of combining the solid fiber core rod and the hollow rod. The method for manufacturing the air hole rods can adjust the parameters such as the diameter, the size and the like of the air hole rods meeting the required optical fiber structure at will, and is flexible in design. On the other hand, the stacking of the air hole rod solves the problem of fiber performance change caused by inaccurate control of the refractive index of the solid rod in the prior rod stacking technology, and ensures the consistency of the fiber drawing performance and the design performance.
Drawings
FIG. 1 is a schematic structural diagram of an air-hole-rod-based multi-core optical fiber;
FIG. 2 is a flow chart of a method for preparing a multi-core optical fiber based on an air hole rod;
Reference numerals: 10. a solid rod; 11. a first hollow bar; 12. a capillary hollow tube; 20. a second hollow bar.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1: a multi-core optical fiber based on an air hole rod comprises a solid rod 10, a first hollow rod 11, a capillary hollow tube 12 and a second hollow rod 20; solid stick 10 is equipped with a plurality of, and evenly distributed is in the air hole stick, 11 suits of first hollow stick are in solid stick 10, capillary hollow tube 12 fills in the clearance between first hollow stick 11, and the diameter of capillary hollow tube 12 is not of uniform size, the second hollow tube holds above-mentioned all solid sticks 10, first hollow stick 11 and capillary hollow tube 12, do not directly contact with first hollow tube in the second hollow tube, and it has a plurality of capillary hollow tube 12 to fill between second hollow tube and the first hollow tube.
As shown in fig. 2: a method for preparing the air-holey rod-based multicore optical fiber of claim 1, comprising the steps of: sleeving a plurality of solid rods 10 into the first hollow rod 11 respectively, and vacuumizing a connecting layer between the first hollow rod 11 and the solid rods 10; step two: placing a first hollow rod 11 lined with a solid rod 10 and a capillary hollow tube 12 into a second hollow rod 20, uniformly arranging the first hollow rod 11 according to the axial direction of the second hollow rod 20, fully filling the capillary hollow tube 12 between the first hollow rod 11 and the second hollow rod 20, and vacuumizing the gap between the first hollow rod 11 and the second hollow rod 20; step three: forming the second hollow rod 20, the capillary hollow tube 12 and the first hollow tube into a complete multi-core optical fiber preform by adopting a fusion shrinkage method; step four: and the complete multicore optical fiber perform is manufactured into multicore optical fibers through wire drawing and coating.
As shown in fig. 1: the first hollow rod 11 is sleeved in the solid rod 10, a vacuum layer is arranged between the solid rod 10 and the first hollow rod 11, and an air extraction equipment interface is arranged at a node of the multi-core optical fiber between the solid rod 10 and the first hollow rod 11. The first hollow rod 11 and the solid rod 10 are vacuumized, so that bubbles in the core rod can be avoided in the subsequent melting process, and the quality of the core rod is improved.
As shown in fig. 1: the first hollow rods 11 are uniformly distributed in the second hollow rods 20, the first hollow rods 11 are arranged in an axial array mode according to the second hollow rods 20, the first hollow rods 11 are movably connected with the surrounding capillary hollow tubes 12 in the second hollow rods 20, and gaps exist among the first hollow rods 11, the second hollow rods 20 and the capillary hollow tubes 12. The first hollow rods 11 are arranged on the axis of the second hollow rod 20 and are uniformly distributed, so that the first hollow rods can be tightly attached to the second hollow rod in the melting process, and the core rods in the first hollow rods are not easy to stack on one side.
As shown in fig. 1: the first hollow rod 11 and the capillary hollow tubes 12 are densely distributed in the second hollow rod 20, and gaps among the second hollow rod 20, the capillary hollow tubes 12 and the first hollow rod 11 are all vacuum layers. The gap between the pipelines adopts a vacuum design, and the bubbles in the core rod can be avoided in the melting process.
As shown in fig. 1: the distribution of the first hollow rod 11 in the second hollow rod 20 is one of a dense symmetrical type, a single ring type, a double ring type and a four-sided type. The first hollow rod 11 adopts a plurality of distribution forms with the centers piled up, and the regular arrangement of the inner core rods is ensured in the process of proceeding.
As shown in fig. 1: the number of the solid rods 10 is in the range of 30-50, and the solid rods 10 and the first hollow rods 11 correspond one to one. The larger the number of the solid rods 10, the lower the mechanical properties and manufacturing reliability of the multicore fiber, and the largest core has a certain value in the 50 core on the basis of the availability.
As shown in fig. 1: at least 6 capillary hollow tubes 12 are surrounded around the first hollow rod 11, and there is one and only one solid rod 10 within the first hollow rod 11. The capillary tube 12 is surrounded around the first hollow rod 11, and the effective refractive index between each core rod can be adjusted, thereby reducing bending loss.
Example 2
As shown in fig. 1: a multi-core optical fiber based on an air hole rod comprises a solid rod 10, a first hollow rod 11, a capillary hollow tube 12 and a second hollow rod 20; solid stick 10 is equipped with a plurality of, and evenly distributed is in the air hole stick, 11 suits of first hollow stick are in solid stick 10, capillary hollow tube 12 fills in the clearance between first hollow stick 11, and the diameter of capillary hollow tube 12 is not of uniform size, the second hollow tube holds above-mentioned all solid sticks 10, first hollow stick 11 and capillary hollow tube 12, do not directly contact with first hollow tube in the second hollow tube, and it has a plurality of capillary hollow tube 12 to fill between second hollow tube and the first hollow tube.
As shown in fig. 2: a method for preparing the air-holey rod-based multicore optical fiber of claim 1, comprising the steps of: sleeving a plurality of solid rods 10 into the first hollow rod 11 respectively, and vacuumizing a connecting layer between the first hollow rod 11 and the solid rods 10; step two: placing a first hollow rod 11 lined with a solid rod 10 and a capillary hollow tube 12 into a second hollow rod 20, uniformly arranging the first hollow rod 11 according to the axial direction of the second hollow rod 20, fully filling the capillary hollow tube 12 between the first hollow rod 11 and the second hollow rod 20, and vacuumizing the gap between the first hollow rod 11 and the second hollow rod 20; step three: forming the second hollow rod 20, the capillary hollow tube 12 and the first hollow tube into a complete multi-core optical fiber preform by adopting a fusion shrinkage method; step four: and the complete multicore optical fiber perform is manufactured into multicore optical fibers through wire drawing and coating.
As shown in fig. 2: the evacuation process in the first and second steps is to evacuate the side walls of the first and second hollow rods 11 and 20 by using a vacuum pump. The melting process in the third step is carried out in a sealed vacuum environment. The vacuum pump is adopted to vacuumize the gap in the core rod, and the melting environment is arranged under the vacuum environment, so that bubbles generated in the melting process of the bottom can be reduced.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A multi-core optical fiber based on an air hole rod is characterized in that: comprises a solid rod (10), a first hollow rod (11), a capillary hollow tube (12) and a second hollow rod (20); the hollow bar is characterized in that the solid bars (10) are provided with a plurality of capillary hollow tubes (12) which are uniformly distributed in the air hole bars, the first hollow bars (11) are sleeved in the solid bars (10), the capillary hollow tubes (12) are filled in gaps among the first hollow bars (11), the diameters of the capillary hollow tubes (12) are different, the second hollow bars (20) accommodate all the solid bars (10), the first hollow bars (11) and the capillary hollow tubes (12), the second hollow bars (20) are not directly contacted with the first hollow bars (11), and a plurality of capillary hollow tubes (12) are filled between the second hollow bars (20) and the first hollow bars (11).
2. The air-hole-rod-based multicore fiber of claim 1, wherein: the first hollow rod (11) is sleeved in the solid rod (10), a vacuum layer is arranged between the solid rod (10) and the first hollow rod (11), and an air extraction equipment interface is arranged between the solid rod (10) and the first hollow rod (11) at a node of the multi-core optical fiber.
3. The air-hole-rod-based multicore fiber of claim 1, wherein: the first hollow rods (11) are uniformly distributed in the second hollow rods (20), the first hollow rods (11) are arranged in an array mode according to the axis of the second hollow rods (20), the first hollow rods (11) are movably connected with the surrounding capillary hollow tubes (12) in the second hollow rods (20), and gaps exist among the first hollow rods (11), the second hollow rods (20) and the capillary hollow tubes (12) and pipelines.
4. The air-hole-rod-based multicore fiber of claim 1, wherein: the first hollow rod (11) and the capillary hollow tubes (12) are densely distributed in the second hollow rod (20), and gaps among the second hollow rod (20), the capillary hollow tubes (12) and the first hollow rod (11) are all vacuum layers.
5. The air-hole-rod-based multicore fiber of claim 1, wherein: the first hollow rod (11) is distributed in the second hollow rod (20) in a dense symmetrical mode, a single-ring mode, a double-ring mode or a four-edge mode.
6. The air-hole-rod-based multicore fiber of claim 1, wherein: the number of the solid rods (10) is within the range of 30-50, and the solid rods (10) correspond to the first hollow rods (11) one by one.
7. The air-hole-rod-based multicore fiber of claim 1, wherein: at least 6 capillary hollow tubes are surrounded around the first hollow rod (11), and only one solid rod (10) is arranged in the first hollow rod (11).
8. The method for preparing the air hole rod-based multi-core optical fiber according to claim 1, comprising the following steps: sleeving a plurality of solid rods (10) into the first hollow rod (11) respectively, and vacuumizing a connecting layer between the first hollow rod (11) and the solid rods (10); step two: placing a first hollow rod (11) lined with a solid rod (10) and a capillary hollow tube (12) into a second hollow rod (20), uniformly distributing the first hollow rod (11) according to the axial direction of the second hollow rod (20), fully filling the capillary hollow tube (12) between the first hollow rod (11) and the second hollow rod (20), and vacuumizing the gap between the first hollow rod (11) and the second hollow rod (20); step three: forming a complete multi-core optical fiber perform rod by the second hollow rod (20), the capillary hollow tube (12) and the first hollow rod (11) by adopting a melting shrinkage method; step four: and the complete multicore optical fiber preform is manufactured into a multicore optical fiber through wire drawing and coating.
9. The method of claim 8, wherein the air hole rod-based multicore fiber is prepared by: the vacuumizing treatment in the first step and the second step is to vacuumize the side walls of the first hollow rod (11) and the second hollow rod (20) by a vacuum pump.
10. The method of claim 8, wherein the air hole rod-based multicore fiber is prepared by: the melting process in the third step is carried out in a sealed vacuum environment.
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| CN201910843247.2A CN110568549A (en) | 2019-09-06 | 2019-09-06 | Multi-core optical fiber based on air hole rod and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111635124A (en) * | 2020-04-21 | 2020-09-08 | 艾菲博(宁波)光电科技有限责任公司 | Preparation process of a randomly distributed multi-core imaging fiber |
| CN113568090A (en) * | 2021-07-14 | 2021-10-29 | 艾菲博(宁波)光电科技有限责任公司 | Multi-core microstructure optical fiber for distributed sensing system |
| CN115072983A (en) * | 2022-06-10 | 2022-09-20 | 武汉长盈通光电技术股份有限公司 | Preparation method of hollow anti-resonance optical fiber intermediate prefabricated rod |
| CN118393763A (en) * | 2024-06-26 | 2024-07-26 | 中天科技精密材料有限公司 | Multi-core optical fiber and acousto-optic modulation device |
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