CN114634313B - Temperature matching optical fiber and preparation method thereof - Google Patents
Temperature matching optical fiber and preparation method thereof Download PDFInfo
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- CN114634313B CN114634313B CN202011463395.0A CN202011463395A CN114634313B CN 114634313 B CN114634313 B CN 114634313B CN 202011463395 A CN202011463395 A CN 202011463395A CN 114634313 B CN114634313 B CN 114634313B
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- cladding
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000011521 glass Substances 0.000 claims abstract description 59
- 239000000835 fiber Substances 0.000 claims abstract description 43
- 238000005253 cladding Methods 0.000 claims abstract description 28
- 238000000576 coating method Methods 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 229910005793 GeO 2 Inorganic materials 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims abstract description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 6
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 3
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 18
- 239000010453 quartz Substances 0.000 abstract description 12
- 229910004298 SiO 2 Inorganic materials 0.000 abstract description 6
- 230000004927 fusion Effects 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 4
- 238000003466 welding Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000006060 molten glass Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000005387 chalcogenide glass Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000005383 fluoride glass Substances 0.000 description 1
- 238000007526 fusion splicing Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000000075 oxide glass Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- C03C13/00—Fibre or filament compositions
- C03C13/04—Fibre optics, e.g. core and clad fibre compositions
- C03C13/045—Silica-containing oxide glass compositions
- C03C13/046—Multicomponent glass compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
-
- 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
-
- 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
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
-
- 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
-
- 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
-
- 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
- G02B6/02395—Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture
Abstract
The invention discloses a temperature matching optical fiber and a preparation method thereof, and is characterized in that the optical fiber section structure sequentially comprises a fiber core (1), a cladding (2), an inner coating (3) and an outer coating (4) from the center to the outside. The fiber core and the cladding material are multicomponent glass, and the inner coating and the outer coating material are acrylic resin materials. Wherein the fiber core glass component comprises 68-78% of SiO 2 3.9-5.9% of B 2 O 3 14.5-24.5% GeO 2 1-3% of P 2 O 5 0.1 to 0.3% of Al 2 O 3 0.2 to 0.4% of CaO, 0.2 to 0.4% of MgO, 0.1 to 0.2% of Na 2 O; the cladding glass component comprises 69-79% of SiO 2 19-23% of B 2 O 3 1.9-2.3% of GeO 2 1-3% of P 2 O 5 0.1 to 0.3% of Al 2 O 3 0.1 to 0.3% of CaO, 0.1 to 0.3% of MgO, 0.1 to 0.2% of Na 2 O. The preparation method of the optical fiber comprises the steps of melting fiber core glass and cladding glass, processing a preform rod and drawing the optical fiber. The optical fiber provided by the invention can be used for realizing low-loss fusion welding of the multicomponent glass optical fiber and the quartz optical fiber, and has good mechanical strength and bending resistance, and high practical value.
Description
Technical Field
The invention relates to a temperature matching optical fiber and a preparation method thereof, belonging to the field of special optical fibers. The optical fiber is used for transition between the multicomponent optical fiber and the quartz optical fiber, so that low-loss fusion bonding of the multicomponent optical fiber and the quartz optical fiber is realized.
Background
The generation and amplification of 2.1 μm wavelength ultrashort pulse laser adopts Ho 3+ Doped gain fiber, ho 3+ A kind of electronic device 5 I 7 → 5 I 8 The transition can generate laser with the wavelength of 2.05-2.15 mu m. To achieve high repetition rate output of 2.1 μm wavelength mode-locked laser pulses, a gain fiber with a high absorption coefficient is required. High gain Ho 3+ Doped optical fibers are mainly based on multicomponent glass mechanisms, such as oxide glasses, fluoride glasses, chalcogenide glasses, etc. Currently, the use of multicomponent glass fibers faces a major problem: low loss fusion bonding with passive devices is difficult to achieve. The traditional passive optical fiber devices such as fiber gratings, couplers and the like still use mature quartz optical fibers, the softening temperature of the quartz optical fibers is extremely high, and the thermal expansion coefficient of the quartz optical fibers is extremely low, so that the fusion bonding of the multicomponent glass optical fibers and the quartz optical fibers is extremely difficult. Therefore, a temperature-matched fiber is needed to achieve low-loss fusion of multicomponent glass fiber and quartz fiber.
Disclosure of Invention
The invention discloses a temperature matching optical fiber and a preparation method thereof. The preparation method of the optical fiber comprises the steps of melting fiber core glass and cladding glass, processing a preform rod and drawing the optical fiber.
The technical scheme adopted by the invention is as follows:
1. the composition of the cladding glass is designed so that the glass has a softening temperature, a coefficient of expansion, and a refractive index that are all between those of the silica optical fiber and the multicomponent glass, while the glass has good fiber forming properties and has small absorption at wavelengths of 2.1 μm and 1.0 μm. In combination with the above-mentioned factors,
the cladding glass comprises 69-79% of SiO 2 19-23% of B 2 O 3 1.9-2.3% of GeO 2 1-3% of P 2 O 5 0.1 to 0.3% of Al 2 O 3 0.1 to 0.3% of CaO, 0.1 to 0.3% of MgO, 0.1 to 0.2% of Na 2 O. The corresponding formula is 69-79% of SiO 2 19-23% of B 2 O 3 1.9-2.3% of GeO 2 1-3% of P 2 O 5 0.1 to 0.3% of Al (OH) 3 0.1 to 0.3% of CaO, 0.1 to 0.3% of MgO, 0.1 to 0.2% of Na 2 CO 3 。
2. The components of the fiber core glass are designed, the softening temperature, the expansion coefficient and the refractive index of the glass are required to be all between those of the quartz optical fiber and the multicomponent glass, the fiber forming performance of the glass is good, the absorption at wavelengths of 2.1 mu m and 1.0 mu m is small, and the refractive index of the fiber core is slightly higher than that of the cladding glass so as to meet the design requirement of numerical aperture. By considering the above factors comprehensively, the fiber core glass comprises 68-78% of SiO 2 3.9-5.9% of B 2 O 3 14.5-24.5% GeO 2 1-3% of P 2 O 5 0.1 to 0.3% of Al 2 O 3 0.2 to 0.4% of CaO, 0.2 to 0.4% of MgO, 0.1 to 0.2% of Na 2 O. Corresponding formula of 68-78% SiO 2 3.9-5.9% of B 2 O 3 14.5-24.5% GeO 2 1-3% of P 2 O 5 0.1 to 0.3% of Al (OH) 3 0.2 to 0.4% of CaO, 0.2 to 0.4% of MgO, 0.1 to 0.2% of Na 2 CO 3 。
3. For fiber core and cladding sizing, matching with silica fibers and multicomponent fibers is contemplated. The fiber core diameter of the optical fiber is 10+/-2 mu m, and the cladding diameter is 125+/-10 mu m.
4. For the design of the material and structure of the optical fiber coating layer, the easy stripping property of the coating is considered, and the mechanical strength and the bending resistance of the optical fiber can be ensured. The optical fiber coating adopts an acrylic resin material, the structure is a double-layer coating structure, the diameter of the inner coating is 185+/-20 mu m, and the diameter of the outer coating is 245+/-10 mu m.
Compared with the prior art, the invention has the beneficial effects that:
1. unlike MCVD process to prepare fiber component singly, the present invention prepares cladding glass and fiber core glass separately with glass melting process, and has diversified glass components and flexible design.
2. The invention fully considers the easy stripping property of the coating, ensures the mechanical strength and the bending resistance of the optical fiber by the coating design, and has high practical value.
Drawings
FIG. 1 is a schematic cross-sectional view of a temperature matched fiber.
FIG. 2 shows the positions of the temperature-matched fiber and the silica fiber after fusion-splicing.
In the figure, a fiber core-1, a cladding-2, an inner coating-3, an outer coating-4, a quartz fiber-5, a temperature matching fiber-6 and a multicomponent fiber-7
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The cross section of the temperature matching optical fiber is shown in fig. 1, and the structure sequentially comprises a fiber core, a cladding, an inner coating and an outer coating from the center to the outside.
The specific manufacturing process of the temperature matching optical fiber comprises the following steps:
1. the fiber core and cladding glass are prepared respectively by adopting a glass melting method, and the preparation process comprises the steps of batching, feeding, melting, casting and annealing.
2. And manufacturing a rod-tube method preform, respectively processing the fiber core glass into rod shapes, processing the cladding glass into sleeve shapes, and combining the fiber core glass and the cladding glass into the optical fiber preform.
3. And drawing the preform rod, wherein a double-layer coating process is adopted in the drawing process.
The invention is further illustrated by the following examples.
Embodiment one:
1. glass melting was performed using the five formulations in table 1.
Table 1 five sets of glass formulations in the examples
2. The feeding temperature is 1480-1500 ℃ during melting, the melting temperature of the raw materials is 1500-1600 ℃, stirring is carried out for 1 st time 1.5 hours after the raw materials are completely added, then stirring is carried out for 3 times every 1 hour, heat preservation and clarification are carried out for 1 hour after stirring for 3 times, and then the furnace temperature is reduced to 1450 ℃ within 20 minutes.
3. And (3) placing the cast iron mold for pouring into a muffle furnace, raising the temperature of the muffle furnace to 500 ℃, preserving heat, opening a furnace door of the muffle furnace when the temperature of the molybdenum rod furnace is reduced to 1450 ℃, taking out the preheated mold, placing the mold on a stainless steel platform, discharging the glass material, and pouring the glass material into the mold.
4. Naturally cooling the poured molten glass in a mould, when the molten glass is judged to be cooled to be non-flowing, putting the glass and the mould into an annealing furnace together, and closing the electric self-cooling after the heat preservation time is 3 hours at the annealing temperature of 670+/-20 ℃.
5. The five glasses were tested for expansion coefficient, softening point and refractive index and the results are shown in table 2.
Table 2 five sets of glass performance tests
6. Processing the No. 2 glass as fiber core glass into a cylinder with the diameter of 1.37+/-0.01 mm; processing 4# glass as cladding glass into a sleeve with phi (18+/-0.1) mm and inner diameter phi of 1.39+/-0.01 mm; and placing the fiber core glass into cladding glass to form the rod-tube method preform.
7. And drawing the preform rod at 1400+/-10 ℃ and 20+/-5 m/min.
8. The fiber forming performance of the optical fiber is good, the screening tension can reach 0.5%, the minimum bending radius is less than or equal to 20cm, the fiber loss @2.1 mu m is 0.55dB/m, the optical fiber can be welded with a quartz optical fiber and a multi-component optical fiber through a test, and the optical fiber has practical value and temperature matching optical fibers, the quartz optical fiber and a plurality of groups.
Claims (8)
1. A temperature matching optical fiber is characterized in that the optical fiber structure comprises a fiber core, a cladding, an inner coating and an outer coating from the center to the outside in sequence; the fiber core and the cladding are multicomponent glass, and the fiber core comprises 68-78% of SiO by mass percent 2 3.9 to 5.9 percent of B 2 O 3 14.5 to 24.5 percent of GeO 2 1 to 3 percent of P 2 O 5 0.1 to 0.3 percent of Al 2 O 3 0.2 to 0.4 percent of CaO, 0.2 to 0.4 percent of MgO and 0.1 to 0.2 percent of Na 2 O; the cladding component comprises 69-79% of SiO by mass percent 2 19 to 23 percent of B 2 O 3 1.9 to 2.3 percent of GeO 2 1 to 3 percent of P 2 O 5 0.1 to 0.3 percent of Al 2 O 3 0.1 to 0.3 percent of CaO, 0.1 to 0.3 percent of MgO and 0.1 to 0.2 percent of Na 2 O; the inner coating and the outer coating are both acrylic resin materials.
2. A temperature-matched fiber according to claim 1, wherein the core diameter is 10±2 μm, the cladding diameter is 125±10 μm, the inner coating diameter is 185±20 μm, and the outer coating diameter is 245±10 μm.
3. A temperature-matched optical fiber according to claim 1, wherein the core glass has a softening temperature of 900 to 1300 ℃ and an expansion coefficient of (5 to 20) ×10 -7 and/K, the refractive index is 1.465+ -0.010.
4. The temperature-matched optical fiber according to claim 1, wherein the cladding glass has a softening temperature of 900 to 1300 ℃ and an expansion coefficient of (5 to 20). Times.10 -7 The refractive index is 1.457+ -0.010.
5. The preparation method of the temperature matching optical fiber is characterized by comprising the following steps:
1) Preparing fiber core glass and cladding glass respectively, wherein the preparation process comprises the steps of proportioning, charging, melting, pouring and annealing; the formula of the fiber core glass comprises 68-78% of SiO by mass percent 2 3.9 to 5.9 percent of B 2 O 3 14.5 to 24.5 percent of GeO 2 1 to 3 percent of P 2 O 5 0.1 to 0.3 percent of Al (OH) 3 0.2 to 0.4 percent of CaO, 0.2 to 0.4 percent of MgO and 0.1 to 0.2 percent of Na 2 CO 3 The method comprises the steps of carrying out a first treatment on the surface of the The formula of the cladding glass comprises 69-79% of SiO by mass percent 2 19 to 23 percent of B 2 O 3 1.9 to 2.3 percent of GeO 2 1 to 3 percent of P 2 O 5 0.1 to 0.3 percent of Al (OH) 3 0.1 to 0.3 percent of CaO, 0.1 to 0.3 percent of MgO and 0.1 to 0.2 percent of Na 2 CO 3；
2) Processing the fiber core glass into rod type, processing the cladding glass into sleeve type, and combining the fiber core glass and the cladding glass into an optical fiber preform;
3) And drawing the preform rod, wherein a double-layer coating process is adopted in the drawing process.
6. The method of manufacturing a temperature-matched optical fiber according to claim 5, wherein the feeding temperature is 1300-1500 ℃ and the melting temperature is 1400-1600 ℃ when the core glass and the cladding glass are melted.
7. The method of manufacturing a temperature-matched fiber according to claim 5, wherein the annealing temperature of the core glass and the cladding glass is 500-800 ℃.
8. The method of manufacturing a temperature-matched fiber according to claim 5, wherein the drawing temperature is 1200 to 1600 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011463395.0A CN114634313B (en) | 2020-12-15 | 2020-12-15 | Temperature matching optical fiber and preparation method thereof |
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| CN202011463395.0A CN114634313B (en) | 2020-12-15 | 2020-12-15 | Temperature matching optical fiber and preparation method thereof |
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| CN114634313A CN114634313A (en) | 2022-06-17 |
| CN114634313B true CN114634313B (en) | 2023-11-28 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4264131A (en) * | 1978-05-16 | 1981-04-28 | Tokyo Shibaura Denki Kabushiki Kaisha | Optical fiber of high durability prepared from multicomponent glass |
| US4289516A (en) * | 1979-10-04 | 1981-09-15 | Eotec Corporation | Low loss optical fibers |
| JPS56160341A (en) * | 1980-05-16 | 1981-12-10 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber |
| US4339173A (en) * | 1975-09-08 | 1982-07-13 | Corning Glass Works | Optical waveguide containing P2 O5 and GeO2 |
| US4666247A (en) * | 1985-02-08 | 1987-05-19 | American Telephone And Telegraph Company, At&T Bell Laboratories | Multiconstituent optical fiber |
| CN108046610A (en) * | 2017-11-29 | 2018-05-18 | 中国科学院西安光学精密机械研究所 | A kind of low softening temperature welding optic fibre and preparation method thereof |
| CN109399946A (en) * | 2018-11-20 | 2019-03-01 | 广州宏晟光电科技股份有限公司 | Mechanical formation processes are melted in a kind of fibre cladding glass and its tank furnace |
-
2020
- 2020-12-15 CN CN202011463395.0A patent/CN114634313B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4339173A (en) * | 1975-09-08 | 1982-07-13 | Corning Glass Works | Optical waveguide containing P2 O5 and GeO2 |
| US4264131A (en) * | 1978-05-16 | 1981-04-28 | Tokyo Shibaura Denki Kabushiki Kaisha | Optical fiber of high durability prepared from multicomponent glass |
| US4289516A (en) * | 1979-10-04 | 1981-09-15 | Eotec Corporation | Low loss optical fibers |
| JPS56160341A (en) * | 1980-05-16 | 1981-12-10 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber |
| US4666247A (en) * | 1985-02-08 | 1987-05-19 | American Telephone And Telegraph Company, At&T Bell Laboratories | Multiconstituent optical fiber |
| CN108046610A (en) * | 2017-11-29 | 2018-05-18 | 中国科学院西安光学精密机械研究所 | A kind of low softening temperature welding optic fibre and preparation method thereof |
| CN109399946A (en) * | 2018-11-20 | 2019-03-01 | 广州宏晟光电科技股份有限公司 | Mechanical formation processes are melted in a kind of fibre cladding glass and its tank furnace |
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| CN114634313A (en) | 2022-06-17 |
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