CN110066106A - A kind of preparation method of ultra-low loss large effective area fiber - Google Patents
A kind of preparation method of ultra-low loss large effective area fiber Download PDFInfo
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- CN110066106A CN110066106A CN201910276170.5A CN201910276170A CN110066106A CN 110066106 A CN110066106 A CN 110066106A CN 201910276170 A CN201910276170 A CN 201910276170A CN 110066106 A CN110066106 A CN 110066106A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
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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
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/022—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from molten glass in which the resultant product consists of different sorts of glass or is characterised by shape, e.g. hollow fibres, undulated fibres, fibres presenting a rough surface
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/28—Macromolecular compounds or prepolymers obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/285—Acrylic resins
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/26—Macromolecular compounds or prepolymers
- C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C03C25/36—Epoxy resins
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention discloses a kind of preparation methods of ultra-low loss large effective area fiber of optical fiber preparation technical field, the preparation method of the ultra-low loss large effective area fiber includes the following steps: drawing optical fibers: prefabricated rods are inserted into high temperature furnace, prefabricated rods are melted by high temperature furnace, wire drawing is carried out to it under gravity, inert gas is perfused into high temperature furnace during melting for high temperature furnace, and the oxygen in high temperature furnace is squeezed out；The oxygen in high temperature furnace, the first annealing furnace, the second annealing furnace and third annealing furnace is discharged by inert gas by the present invention, it is aoxidized to reduce oxygen with the graphite body surface in high-temperature smelting pot, to reduce the infiltration of impurity, slow cooling annealing is carried out to optical fiber by the first annealing furnace, the second annealing furnace and third annealing furnace, it is annealed by three-level, the stress in optical fiber is largely eliminated, the intensity of optical fiber is strengthened, the test of adverse circumstances can be met.
Description
Technical field
The present invention relates to optical fiber preparation technical field, specially a kind of preparation side of ultra-low loss large effective area fiber
Method.
Background technique
Optical fiber is writing a Chinese character in simplified form for optical fiber, is a kind of fiber made of glass or plastics, can be used as light conduction tool.It passes
Defeated principle is " total reflection of light ".
The raw material such as silicon tetrachloride are made to the process of optical fiber.The process of fiber manufacturing determine optical fiber mechanical strength,
Transmission characteristic and service life, it is particularly significant to guarantee optical fiber quality.The manufacture of telecommunication optical fiber is divided into stick processed and wire drawing twice work
Sequence.
Fiber strength is one of ultra-low-loss fiber key index, is mainly reflected in screening strain, ordinary optic fibre is answered
Become and generally comes from laying and the caused tension that expands with heat and contract with cold 1% or so to cope with, and ultra-low-loss fiber is applied in extra long distance
In optical communication chain circuit, it is often necessary to suffered from when considering laying or variation of ambient temperature across the adverse circumstances such as gobi, deep-sea
The tension arrived is bigger compared to ordinary optical cable, comprehensively considers " deep-sea cable " national standard, laying difficulty and service life etc. side
Face, it is desirable to the strain of ultra-low-loss fiber reach 2% even more than, the needs of optical fiber cabling and laying can be fully met.Optical fiber
Intensity depend primarily on the micro-crack on bare fibre surface.It is foreign particle of the micro-crack in fiber drawing furnace in optical fiber.
Foreign particle is attached to optical fiber surface, in cooling procedure, forms crackle and stress is concentrated, optical fiber surface crackle is by atmospheric environment
Middle hydrone is acted on and is gradually corroded, and causes oxygen-octahedron destructurized, the fracture of silicon oxygen bond can expand the model of micro-crack
It encloses, influences fiber strength.Small amounts, which occur, for graphite piece surface after fiber drawing furnace long-term work, in furnace becomes wire drawing furnace body surface
Must be coarse, prefabricated rods generate a small amount of silica distillation at high temperature and react the hard carbonization of generation with wire drawing furnace body inner surface
Silicon particle, and in existing fiber preparation, optical fiber by disposable annealing, can not only effectively eliminate in optical fiber
Stress, the strong influence intensity of optical fiber, can not effective full sufficient adverse circumstances test.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation methods of ultra-low loss large effective area fiber, to solve above-mentioned back
The intensity of the optical fiber proposed in scape technology depends primarily on the micro-crack on bare fibre surface, is micro-crack mainly from drawing in optical fiber
Foreign particle in silk furnace, foreign particle are attached to optical fiber surface, in cooling procedure, form crackle and stress is concentrated, optical fiber
Face crack is acted on by hydrone in atmospheric environment and is gradually corroded, and causes oxygen-octahedron destructurized, and silicon oxygen bond breaks
The range that can expand micro-crack is split, fiber strength is influenced, after fiber drawing furnace long-term work, small amounts occur for graphite piece surface in furnace
Wire drawing furnace body surface is set to become coarse, prefabricated rods generate a small amount of silica distillation and wire drawing furnace body inner surface at high temperature
Reaction generates hard silicon-carbide particles, and in existing fiber preparation, and optical fiber, can not only by disposable annealing
Effectively eliminate the stress in optical fiber, the strong influence intensity of optical fiber, can not effective full sufficient adverse circumstances test
The problem of.
To achieve the above object, the invention provides the following technical scheme: a kind of system of ultra-low loss large effective area fiber
The preparation method of Preparation Method, the ultra-low loss large effective area fiber includes the following steps:
S1: drawing optical fibers: prefabricated rods are inserted into high temperature furnace, are melted by high temperature furnace to prefabricated rods, in the work of gravity
Wire drawing is carried out to it with lower, inert gas is perfused into high temperature furnace during melting, the oxygen in high temperature furnace is squeezed for high temperature furnace
Out；
S2: anneal for the first time: the optical fiber by wire drawing is entered in the first annealing furnace and is annealed, the first annealing furnace and high temperature furnace
It is connected, inert gas equally is perfused in the first annealing furnace, the oxygen in the first annealing furnace is squeezed out, heater strip, temperature are passed through
Sensor and temperature control device control the temperature in the first annealing furnace, and the temperature in the first annealing furnace is maintained at certain area
Between constant temperature among, to optical fiber carry out slow cooling annealing；
S3: second anneals: will be moved under gravity in the second annealing furnace by the optical fiber of annealing for the first time, second
Annealing furnace is connected with the first annealing furnace, and inert gas is equally perfused in the second annealing furnace, and the oxygen in the second annealing furnace is discharged,
Second annealing furnace is equally equipped with heater strip, temperature sensor and temperature control device, and the temperature in the second annealing furnace is maintained at one
Determine among the constant temperature in section, slow cooling annealing is carried out to optical fiber；
S4: third time is annealed: will be moved under gravity in third annealing furnace by the optical fiber of second of annealing, third
Annealing furnace is connected with the first annealing furnace, and inert gas is perfused in third annealing furnace, and the oxygen in third annealing furnace, third is discharged
Annealing furnace is equally equipped with heater strip, temperature sensor and temperature control device, and the temperature in third annealing furnace is maintained at certain area
Between constant temperature among, to optical fiber carry out slow cooling annealing；
S5: cooling: will to be moved in cooling tube, optical fiber is carried out rapidly cold in line of gravity by the optical fiber of third time annealing
But, the fiber optic temperature in cooling tube is rapidly reduced to 100 DEG C or less；
S6: applying coating: the optical fiber by rapid cooling is moved in coating unit under gravity, to the surface of optical fiber
Carry out applying coating；
S7: solidify: being moved in solidification case and solidified by the optical fiber of applying coating；
S8: it winding: is wound by winder to by cured optical fiber.
Preferably, the temperature in the high temperature furnace in the step S1 is at 1900 DEG C -2200 DEG C.
Preferably, the temperature in the first annealing furnace in the step S2 is maintained at 1500 DEG C -1700 DEG C.
Preferably, the temperature in the second annealing furnace in the step S3 is maintained at 900 DEG C -1200 DEG C.
Preferably, the temperature in the second annealing furnace in the step S4 is maintained at 300 DEG C -600 DEG C.
Preferably, the coated coating in the step S6 is epoxy acrylate or polyacrylate.
Preferably, the solidification case in the step S7 is ultraviolet curing case, by ultraviolet light to the coating of optical fiber surface
Solidified.
Compared with prior art, the beneficial effects of the present invention are: the present invention is annealed high temperature furnace, first by inert gas
Oxygen discharge in furnace, the second annealing furnace and third annealing furnace, so that the graphite body surface reduced in oxygen and high-temperature smelting pot is sent out
Raw oxidation carries out optical fiber by the first annealing furnace, the second annealing furnace and third annealing furnace slow to reduce the infiltration of impurity
Cooling annealing, is annealed by three-level, largely eliminates the stress in optical fiber, strengthen the intensity of optical fiber, can met
The test of adverse circumstances.
Detailed description of the invention
Fig. 1 is preparation method flow chart of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of preparation method of ultra-low loss large effective area fiber, it being capable of effective guarantee
Fiber strength can meet the test of adverse circumstances.
Embodiment
The preparation method of the ultra-low loss large effective area fiber includes the following steps:
S1: drawing optical fibers: prefabricated rods are inserted into high temperature furnace, and the fibre core of prefabricated rods is silica, and inner cladding is fluorine doped two
Silica, surrounding layer are germanium-doped silica, are melted by high temperature furnace to prefabricated rods, are carried out under gravity to it
Wire drawing, surrounding is mounted equidistant four tracheaes at the top of the outer wall of high temperature furnace, and the outer wall of tracheae and high temperature furnace is in 45 ° of oblique cuttings from top to bottom
On the outer wall of high temperature furnace, inert gas is intratracheally perfused, inert gas is neon, argon gas, Krypton or xenon, passes through indifferent gas
Body squeezes out the oxygen in high temperature furnace, aoxidizes to reduce oxygen with the graphite body surface in high-temperature smelting pot, to reduce
The infiltration of impurity ensure that the intensity of optical fiber, the temperature in high temperature furnace are maintained between 1900 DEG C -2200 DEG C；
S2: anneal for the first time: the optical fiber by wire drawing is entered in the first annealing furnace and is annealed, the temperature in the first annealing furnace
It is maintained between 1500 DEG C -1700 DEG C, the first annealing furnace is connected with high temperature furnace, and the inert gas in high temperature furnace is filled into first and moves back
In stove, the oxygen in the first annealing furnace is squeezed out, by heater strip, temperature sensor and temperature control device in the first annealing furnace
Temperature controlled, heater strip connect by conducting wire with temperature sensor, and temperature sensor passes through conducting wire and temperature control device company
It connects, temperature sensor detects the temperature in the first annealing furnace, and the temperature data that real-time detection is arrived is transmitted by charged signal
To temperature control device, the output to heater strip electric current is controlled by temperature control device, the temperature of heater strip is controlled with this, controls the with this
Temperature in first annealing furnace is maintained among the constant temperature in certain section by the temperature in one annealing furnace, is carried out to optical fiber slow
Cooling annealing；
S3: second anneals: will be moved under gravity in the second annealing furnace by the optical fiber of annealing for the first time, second
Annealing furnace is connected with the first annealing furnace, and the inert gas in the first annealing furnace is filled into the second annealing furnace, passes through inert gas
By the oxygen discharge in the second annealing furnace, the second annealing furnace is equally equipped with heater strip, temperature sensor and temperature control device, passes through
Heater strip, temperature sensor and temperature control device control the temperature in the first annealing furnace, and heater strip passes through conducting wire and temperature
Sensor connection, temperature sensor are connect by conducting wire with temperature control device, and temperature sensor detects the temperature in the second annealing furnace,
And by real-time detection to temperature data temperature control device is passed to by charged signal, by temperature control device control to heater strip electricity
The output of stream controls the temperature of heater strip with this, controls the temperature in the first annealing furnace with this, by the temperature in the second annealing furnace
It is maintained among the constant temperature in certain section, slow cooling annealing is carried out to optical fiber；
S4: third time is annealed: will be moved under gravity in third annealing furnace by the optical fiber of second of annealing, third
Annealing furnace is connected with the first annealing furnace, and the inert gas in the second annealing furnace is filled into third annealing furnace, passes through inert gas
By the oxygen discharge in third annealing furnace, third annealing furnace is equally equipped with heater strip, temperature sensor and temperature control device, passes through
Heater strip, temperature sensor and temperature control device control the temperature in the first annealing furnace, and heater strip passes through conducting wire and temperature
Sensor connection, temperature sensor are connect by conducting wire with temperature control device, and temperature sensor detects the temperature in third annealing furnace,
And by real-time detection to temperature data temperature control device is passed to by charged signal, by temperature control device control to heater strip electricity
The output of stream controls the temperature of heater strip with this, controls the temperature in the first annealing furnace with this, by the temperature in third annealing furnace
It is maintained among the constant temperature in certain section, slow cooling annealing is carried out to optical fiber, is annealed by three-level, largely eliminates optical fiber
Interior stress strengthens the intensity of optical fiber, can meet the test of adverse circumstances；
S5: cooling: will to be moved in cooling tube by the optical fiber of third time annealing in line of gravity, cooling tube is helium gas cooling
Pipe, cooled down by helium to optical fiber, carry out rapid cooling, by the fiber optic temperature in cooling tube be rapidly reduced to 100 DEG C with
Under；
S6: applying coating: the optical fiber by rapid cooling is moved in coating unit under gravity, to the surface of optical fiber
Applying coating is carried out, coating is epoxy acrylate or polyacrylate；
S7: solidify: being moved in solidification case and solidified by the optical fiber of applying coating, solidification case is ultraviolet curing case, is led to
Ultraviolet light is crossed to solidify the coating of optical fiber surface；
S8: it winding: is wound by winder to by cured optical fiber.
In summary, will be in high temperature furnace, the first annealing furnace, the second annealing furnace and third annealing furnace by inert gas
Oxygen discharge, aoxidized to reduce oxygen with the graphite body surface in high-temperature smelting pot, it is logical to reduce the infiltration of impurity
It crosses the first annealing furnace, the second annealing furnace and third annealing furnace and slow cooling annealing is carried out to optical fiber, annealed by three-level, greatly
The stress in optical fiber is eliminated, the intensity of optical fiber is strengthened, the test of adverse circumstances can be met.
Although hereinbefore invention has been described by reference to embodiment, the scope of the present invention is not being departed from
In the case where, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as being not present
Structural conflict, the various features in presently disclosed embodiment can be combined with each other use by any way,
The description for not carrying out exhaustive to the case where these combinations in this specification is examined merely for the sake of omission length with what is economized on resources
Consider.Therefore, the invention is not limited to specific embodiments disclosed herein, but the institute including falling within the scope of the appended claims
There is technical solution.
Claims (7)
1. a kind of preparation method of ultra-low loss large effective area fiber, it is characterised in that: the ultra-low loss large effective area light
Fine preparation method includes the following steps:
S1: drawing optical fibers: prefabricated rods are inserted into high temperature furnace, are melted by high temperature furnace to prefabricated rods, in the work of gravity
Wire drawing is carried out to it with lower, inert gas is perfused into high temperature furnace during melting, the oxygen in high temperature furnace is squeezed for high temperature furnace
Out；
S2: anneal for the first time: the optical fiber by wire drawing is entered in the first annealing furnace and is annealed, the first annealing furnace and high temperature furnace
It is connected, inert gas equally is perfused in the first annealing furnace, the oxygen in the first annealing furnace is squeezed out, heater strip, temperature are passed through
Sensor and temperature control device control the temperature in the first annealing furnace, and the temperature in the first annealing furnace is maintained at certain area
Between constant temperature among, to optical fiber carry out slow cooling annealing；
S3: second anneals: will be moved under gravity in the second annealing furnace by the optical fiber of annealing for the first time, second
Annealing furnace is connected with the first annealing furnace, and inert gas is equally perfused in the second annealing furnace, and the oxygen in the second annealing furnace is discharged,
Second annealing furnace is equally equipped with heater strip, temperature sensor and temperature control device, and the temperature in the second annealing furnace is maintained at one
Determine among the constant temperature in section, slow cooling annealing is carried out to optical fiber；
S4: third time is annealed: will be moved under gravity in third annealing furnace by the optical fiber of second of annealing, third
Annealing furnace is connected with the first annealing furnace, and inert gas is perfused in third annealing furnace, and the oxygen in third annealing furnace, third is discharged
Annealing furnace is equally equipped with heater strip, temperature sensor and temperature control device, and the temperature in third annealing furnace is maintained at certain area
Between constant temperature among, to optical fiber carry out slow cooling annealing；
S5: cooling: will to be moved in cooling tube, optical fiber is carried out rapidly cold in line of gravity by the optical fiber of third time annealing
But, the fiber optic temperature in cooling tube is rapidly reduced to 100 DEG C or less；
S6: applying coating: the optical fiber by rapid cooling is moved in coating unit under gravity, to the surface of optical fiber
Carry out applying coating；
S7: solidify: being moved in solidification case and solidified by the optical fiber of applying coating；
S8: it winding: is wound by winder to by cured optical fiber.
2. a kind of preparation method of ultra-low loss large effective area fiber according to claim 1, it is characterised in that: described
The temperature in high temperature furnace in step S1 is at 1900 DEG C -2200 DEG C.
3. a kind of preparation method of ultra-low loss large effective area fiber according to claim 1, it is characterised in that: described
The temperature in the first annealing furnace in step S2 is maintained at 1500 DEG C -1700 DEG C.
4. a kind of preparation method of ultra-low loss large effective area fiber according to claim 1, it is characterised in that: described
The temperature in the second annealing furnace in step S3 is maintained at 900 DEG C -1200 DEG C.
5. a kind of preparation method of ultra-low loss large effective area fiber according to claim 1, it is characterised in that: described
The temperature in the second annealing furnace in step S4 is maintained at 300 DEG C -600 DEG C.
6. a kind of preparation method of ultra-low loss large effective area fiber according to claim 1, it is characterised in that: described
Coated coating in step S6 is epoxy acrylate or polyacrylate.
7. a kind of preparation method of ultra-low loss large effective area fiber according to claim 1, it is characterised in that: described
Solidification case in step S7 is ultraviolet curing case, is solidified by coating of the ultraviolet light to optical fiber surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910276170.5A CN110066106A (en) | 2019-04-08 | 2019-04-08 | A kind of preparation method of ultra-low loss large effective area fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910276170.5A CN110066106A (en) | 2019-04-08 | 2019-04-08 | A kind of preparation method of ultra-low loss large effective area fiber |
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| CN110066106A true CN110066106A (en) | 2019-07-30 |
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| CN201910276170.5A Withdrawn CN110066106A (en) | 2019-04-08 | 2019-04-08 | A kind of preparation method of ultra-low loss large effective area fiber |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111470771A (en) * | 2020-04-08 | 2020-07-31 | 杭州辉吉信息技术有限公司 | Optical fiber wire drawing annealing extension tube based on temperature cavity division principle |
| CN115784582A (en) * | 2022-11-01 | 2023-03-14 | 山东省科学院激光研究所 | Annealing device and annealing method of optical fiber sensor |
| WO2024099321A1 (en) * | 2022-11-07 | 2024-05-16 | 江苏亨通光纤科技有限公司 | Multi-core optical fiber drawing device, multi-core optical fiber drawing method and multi-core optical fiber |
-
2019
- 2019-04-08 CN CN201910276170.5A patent/CN110066106A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111470771A (en) * | 2020-04-08 | 2020-07-31 | 杭州辉吉信息技术有限公司 | Optical fiber wire drawing annealing extension tube based on temperature cavity division principle |
| CN115784582A (en) * | 2022-11-01 | 2023-03-14 | 山东省科学院激光研究所 | Annealing device and annealing method of optical fiber sensor |
| CN115784582B (en) * | 2022-11-01 | 2024-05-03 | 山东省科学院激光研究所 | Annealing device and annealing method of optical fiber sensor |
| WO2024099321A1 (en) * | 2022-11-07 | 2024-05-16 | 江苏亨通光纤科技有限公司 | Multi-core optical fiber drawing device, multi-core optical fiber drawing method and multi-core optical fiber |
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Application publication date: 20190730 |
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