CN102320733B - Photonic crystal fiber prefabricated bar and method for manufacturing photonic crystal fiber - Google Patents
Photonic crystal fiber prefabricated bar and method for manufacturing photonic crystal fiber Download PDFInfo
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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
- C03B37/0122—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 for making preforms of photonic crystal, microstructured or holey optical fibres
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- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
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- C03B2203/14—Non-solid, i.e. hollow products, e.g. hollow clad or with core-clad interface
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- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/42—Photonic crystal fibres, e.g. fibres using the photonic bandgap PBG effect, microstructured or holey optical fibres
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
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Abstract
The invention relates to a photonic crystal fiber prefabricated bar and a method for manufacturing a photonic crystal fiber. The photonic crystal fiber prefabricated bar comprises a microstructure area, a mixed arrangement area and a quartz outer sleeve, wherein the microstructure area comprises a quartz capillary which is sealed at one end; the mixed arrangement area comprises a quartz capillary which is sealed at one end and a solid quartz fiber; the microstructure area and the mixed arrangement area are clustered in an inner hole of the quartz outer sleeve; the microstructure area is positioned in the geometric centre of the mixed arrangement area; the obtained photonic crystal fiber prefabricated bar is conveyed into a high-temperature melting furnace for carrying out photonic crystal fiber drawing; and positive and negative pressures are respectively formed through pumping at the microstructure area and the mixed arrangement area in the drawing process to obtain the photonic crystal fiber with the d/lambda value of larger than 90 percent. According to the invention, the requirement on raw materials, such as capillary, and the like can be effectively lowered, the process difficulty can be reduced, the raw material cost can be lowered, the yield can be increased and favorable social benefits and economic benefits are achieved.
Description
Technical field
The present invention relates to the manufacture method of photonic crystal fiber, belong to optic fibre manufacturing technology field, for photon crystal optical fiber preformed rod and manufacture the method for photonic crystal fiber, be specially a kind of mix row's silk photon crystal optical fiber preformed rod and manufacture d/ λ value and be greater than 90% and the special special-shaped photonic crystal fiber method of microstructure area shape.
Background technology
Photonic crystal fiber a kind ofly has the novel optical fiber being different from ordinary optic fibre optical transport mode completely.The propagation of light in ordinary optic fibre, is because refractive index difference causes light, at inside of optical fibre, reflection or bending occurs, thus light is strapped in inside of optical fibre, and onwards transmission vertically.And the biography light of photonic crystal fiber, be the photon band gap formed by inside of optical fibre periodic arrangement, the light of specific wavelength be limited in central defect place to pass light, as Fig. 1 and Fig. 2, Fig. 1 is the sectional view of ordinary optic fibre crystal optical fibre prefabricated rods, and Fig. 2 is the sectional view of photonic crystal fiber.
The manufacture method of existing photonic crystal fiber, is by the thin diameter kapillary rule close-packed arrays of size uniformity, then if make Internal Reflection Photonic Crystal Fiber, then replaces one or more kapillary of center by the solid fibers of same external diameter; If making Photonic Bandgap-photonic Crystal Fibers, then pump one or more kapillary of center, penetrated an outer tube, make photon crystal optical fiber preformed rod, wire drawing in drawing optical fibers system, coating, rolling etc., namely make photonic crystal fiber, as Fig. 3.
Photonic crystal fiber internal microstructure is shown in Fig. 2, and the pore diameter d of microstructure wherein and the ratio of element length λ are the important parameters of photonic crystal fiber, directly determine the basic technical indicator of the optical fiber such as transmission wavelength scope, transmission efficiency.The d/ λ value that some photonic crystal fiber requires is very big, even more than 90%, uses the manufacture method of existing photonic crystal fiber, must make of the quartz capillary of very thin wall.The very thin wall kapillary manufacture difficulty of size uniformity is very large, very easily there is the crisp situation such as easily broken of internal-and external diameter fluctuation, ovalizing deflection, optical fiber, and these indexs be photonic crystal fiber make in key index, size heterogeneity, have the kapillary of ovalizing deflection cannot be used at all make photon crystal optical fiber preformed rod.And the regular thin-walled capillary pipe of size uniformity, shape is expensive, if use this kapillary to make photonic crystal fiber, cost is very high.
In prefabricated stick drawn wire process, in melting furnace, the thermo parameters method of prefabricated rods is also the important factor that restriction photonic crystal fiber is shaped.Because melting furnace heats from the periphery of prefabricated rods, so the thermo parameters method of low, the outer floor height in the center that can be formed in prefabricated rods.Compared to common prefabricated rods, a large amount of pore is full of in photon crystal optical fiber preformed rod, the thermal conductivity of air and about two magnitudes of quartz material difference, considerably increase prefabricated rods center and the outer field temperature difference, with forming the melting of outer field kapillary during major diameter prefabricated stick drawn wire, and the kapillary of center also softening situation not.It is narrow and small that this situation result in photon crystal fiber drawing adjustable range, to such an extent as to the yield rate of photon crystal fiber drawing is very low.
In sum, the current photonic crystal fiber prices of raw and semifnished materials are high, manufacture difficulty is large, yield rate is low, cause the final price of photonic crystal fiber product very expensive, significantly limit the range of application of photonic crystal fiber.
Summary of the invention
The problem to be solved in the present invention is: the photonic crystal fiber prices of raw and semifnished materials of the large d/ λ value of making are high at present, manufacture difficulty is large, yield rate is low, cause the final price of photonic crystal fiber product very expensive, significantly limit the range of application of photonic crystal fiber.
Technical scheme of the present invention is: photon crystal optical fiber preformed rod, comprise microstructure area, mixing arrange regional and quartzy outer tube, the quartz capillary that microstructure area is closed by one end forms, the mixing quartz capillary closed by one end of arrange regional and stuffed quartz fibrous, the quartz capillary of microstructure area is called central capillary, the quartz capillary of mixing arrange regional is called peripheral capillary, central capillary, peripheral capillary and stuffed quartz fiber have identical external diameter, central capillary is different with peripheral capillary internal-and external diameter ratio, microstructure area with mix arrange regional boundling in the endoporus of quartzy outer tube, microstructure area is positioned at the geometric centre of mixing arrange regional, stuffed quartz fiber, peripheral capillary rule is arranged closely in the periphery of microstructure area.
Further, the gap that the peripheral capillary of mixing arrange regional and stuffed quartz fiber are formed, and in the gap of mixing arrange regional and quartzy outer tube, fill the thin stuffed quartz fiber of corresponding gap length.
The photonic crystal fiber that corresponding d/ λ value is greater than 90%, has following two kinds of structures:
The peripheral capillary rule of prefabricated rods mixing arrange regional is arranged closely in the periphery of microstructure area, until touch quartzy outer tube, the method utilizing described structure to mix row's silk prefabricated rods manufacture photonic crystal fiber is, peripheral capillary rule is arranged closely in microstructure area periphery, microstructure area with mix arrange regional set bunchy and penetrate quartzy outer tube and make photon crystal optical fiber preformed rod, prefabricated rods is sent into high temperature smelting furnace, carry out photon crystal fiber drawing, in drawing process, malleation is added in central capillary endoporus, negative pressure is taken out in the hole of peripheral capillary and peripheral capillary and stuffed quartz fiber, central capillary endoporus is expanded the positive and negative pressure produced until the endoporus of peripheral capillary and the hole of mixing alignment area are eliminated completely, obtain the photonic crystal fiber that d/ λ value is greater than 90%.
Or prefabricated rods mixes peripheral capillary and the stuffed quartz fiber fractionation alternately regular periphery being arranged closely in microstructure area of arrange regional, this kind of structure central capillary used can adopt the kapillary that the central capillary wall thickness of the above-mentioned first kind of way of wall ratio is thinner, namely compare the structure that microstructure area periphery only has peripheral capillary to arrange, the wall thickness of the central capillary simultaneously having peripheral capillary and stuffed quartz fiber fractionation alternately to use corresponding to regular compact arranged structure can be thinner, may be used for obtaining the larger photonic crystal fiber of d/ λ value, but compared to existing technology, the present invention's central capillary here does not need the quartz capillary of very thin wall, just can reach the photonic crystal fiber that d/ λ value is greater than 90%.The method utilizing described mixing row silk prefabricated rods to manufacture photonic crystal fiber is, peripheral capillary and stuffed quartz fiber fractionation rule are arranged closely in the periphery of microstructure area, then boundling penetrates quartzy outer tube and makes photon crystal optical fiber preformed rod, prefabricated rods is sent into high temperature smelting furnace, carry out photon crystal fiber drawing, in drawing process, malleation is added in central capillary endoporus, negative pressure is taken out in peripheral capillary with the hole of mixing arrange regional, central capillary endoporus is expanded the positive and negative pressure produced until the endoporus of peripheral capillary and the hole of mixing alignment area are eliminated completely, obtain the photonic crystal fiber that d/ λ value is greater than 90%, stuffed quartz layer of fibers is used for preventing central capillary excessive deformation.
The photonic crystal fiber that corresponding microstructure area shape is special, the peripheral capillary of mixing arrange regional and stuffed quartz fiber subregion are arranged closely in the periphery of microstructure area.The method utilizing described mixing row silk prefabricated rods to manufacture the special photonic crystal fiber of microstructure area shape is, the periphery that the mixing peripheral capillary of arrange regional and stuffed quartz fiber subregion are arranged closely in microstructure area then boundling penetrates quartzy outer tube, the structure of the special-shaped photonic crystal fiber that described subregion draws as required divides, make photon crystal optical fiber preformed rod, prefabricated rods is sent into high temperature smelting furnace, carry out photon crystal fiber drawing, in drawing process, malleation is added in central capillary endoporus, negative pressure is taken out in peripheral capillary with the hole of mixing arrange regional, central capillary endoporus is expanded the positive and negative pressure produced until the endoporus of peripheral capillary and the hole of mixing alignment area are eliminated completely, under the positive/negative-pressure of drawing process, owing to mixing peripheral capillary and the arrangement of stuffed quartz fiber subregion of arrange regional, the regions contract of peripheral capillary, the region of stuffed quartz fiber is constant, according to the region divided in advance, the central capillary of microstructure area expands and obtains the special special-shaped photonic crystal fiber of microstructure area shape.
Feature of the present invention is: the stuffed quartz fiber of same outer diameter used in combination and the quartz capillary of different internal-and external diameter ratio, designs on demand, arranges and boundling, be made into photon crystal optical fiber preformed rod and draw, as Fig. 4 its arrangement mode.Its advantage is as follows:
The mixing row silk method utilizing the present invention to propose, can use solid fibers or hollow quartz capillary at mixing arrange regional, make prefabricated rods.The kapillary endoporus in solid fibers and intercapillary space and mixing arrange regional is controlled when drawing optical fiber, carry out pinch confinement, additional space is provided, it is made to expand to the pressurization of the kapillary endoporus of microstructure area, the d/ λ value of optical fiber can be improved, be met the large d/ λ value photonic crystal fiber of requirement and the special photonic crystal fiber of microstructure area shape.
When making photonic crystal fiber, the distribution in temperature field when the present invention can also improve wire drawing.When arranging silk, the kapillary little to fiber optics performance impact peripheral in original optical fiber is changed and makes stuffed quartz fiber, or reduce with the gap between thin solid fibers filled capillary pipe the volume that air part occupies, so just can reduce the temperature contrast of prefabricated rods inside, reduce the difficulty of wire drawing.
The inventive method also has an apparent advantage, namely uses mixing row silk method to make photonic crystal fiber, can improve the handiness of microstructured ar-rangement widely.Such as can make the photonic crystal fiber with the different d/ λ value of multilayer, microporous layers can be made, photonic crystal fiber that solid layer multilayer replaces, the photonic crystal fiber that microstructure area shape is special can be made, photonic crystal fiber with different microstructured area profile etc. can be made when unified use when identical round endoporus outer tube.
Above-mentioned all features and advantage, show to use mixing row silk method not only can produce more eurypalynous photonic crystal fiber, adapt to different use needs, also reduce the difficulty that photonic crystal fiber manufactures simultaneously.Such as make the photonic crystal fiber of large d/ λ value, the very difficult making of thin-walled capillary pipe that size uniformity, shape are regular, expensive, if use this kapillary to make photonic crystal fiber, cost is very high.The mixing row silk method proposed by the present invention, then can be used thick-walled capillary to make photonic crystal fiber, greatly save manufacturing cost, also reduced manufacture difficulty.Mix row's silk method by the present invention, the photonic crystal fiber of different microstructure area diameter can be made of the outer tube of unified endoporus specification, reduce manufacturing cost.Use mixing row silk method, a part of manufacture difficulty of photonic crystal fiber, transfer to prefabricated rods making processes from drawing process.Such benefit is very significant, and prefabricated rods making processes is a process that can repeat to revise, and can repeatedly make until success; But drawing process is an irreversible process, once wire drawing failure, product and starting material just can only be scrapped.Use mixing row silk method, the yield rate that photonic crystal fiber makes can be improved, reduce the production cost of photonic crystal fiber from another point of view.
In sum, use mixing row silk method to make photonic crystal fiber, the effect of multiple beneficial and special requirement can be realized.This technology has very high practical value when making photonic crystal fiber, has a good application prospect.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing photon crystal optical fiber preformed rod.
Fig. 2 is existing Photonic Bandgap-photonic Crystal Fibers schematic cross-section.
Fig. 3 is the manufacturing flow chart of existing photonic crystal fiber.
Fig. 4 is the manufacturing flow chart of photonic crystal fiber of the present invention.
Fig. 5 is the structural representation of the photon crystal optical fiber preformed rod of the embodiment of the present invention one.
Fig. 6 is the structural representation of the photon crystal optical fiber preformed rod of the embodiment of the present invention one.
Fig. 7 is the structural representation of the photon crystal optical fiber preformed rod of the embodiment of the present invention two.
Fig. 8 is the structural representation of the photon crystal optical fiber preformed rod of the embodiment of the present invention three.
Embodiment
Photon crystal optical fiber preformed rod of the present invention is greater than photonic crystal fiber and the special special-shaped photonic crystal fiber of microstructure area shape of 90% for the manufacture of d/ λ value, comprise microstructure area, mixing arrange regional and quartzy outer tube, the quartz capillary that microstructure area is closed by one end forms, the mixing quartz capillary closed by one end of arrange regional and stuffed quartz fibrous, the quartz capillary of microstructure area is called central capillary, the quartz capillary of mixing arrange regional is called peripheral capillary, central capillary, peripheral capillary and stuffed quartz fiber have identical external diameter, central capillary is different with peripheral capillary internal-and external diameter ratio.Microstructure area with mix arrange regional boundling in the endoporus of quartzy outer tube, microstructure area is positioned at the geometric centre of mixing arrange regional, and stuffed quartz fiber, peripheral capillary rule is arranged closely in the periphery of microstructure area.The gap that the peripheral capillary of mixing arrange regional and stuffed quartz fiber are formed, and in the gap of mixing arrange regional and quartzy outer tube, fill the thin stuffed quartz fiber of corresponding gap length.
Mixing row silk prefabricated rods of the present invention is greater than 90% and special-shaped photonic crystal fiber for the manufacture of d/ λ value, the photonic crystal fiber that corresponding d/ λ value is greater than 90%, has following two kinds of structures:
The peripheral capillary rule of prefabricated rods mixing arrange regional is arranged closely in the periphery of microstructure area, until touch quartzy outer tube, the method utilizing described structure to mix row's silk prefabricated rods manufacture photonic crystal fiber is, peripheral capillary rule is arranged closely in microstructure area periphery, microstructure area with mix arrange regional set bunchy and penetrate quartzy outer tube and make photon crystal optical fiber preformed rod, prefabricated rods is sent into high temperature smelting furnace, carry out photon crystal fiber drawing, in drawing process, malleation is added in central capillary endoporus, negative pressure is taken out in the hole of peripheral capillary and peripheral capillary and stuffed quartz fiber, central capillary endoporus is expanded the positive and negative pressure produced until the endoporus of peripheral capillary and the hole of mixing alignment area are eliminated completely, obtain the photonic crystal fiber that d/ λ value is greater than 90%.
Or the prefabricated rods mixing peripheral capillary of arrange regional and stuffed quartz fiber fractionation alternately rule be arranged closely in the periphery of microstructure area, the central capillary of the structure that the wall ratio microstructure area periphery of the central capillary that this kind of structure is used only has peripheral capillary to arrange is thin.The method utilizing described mixing row silk prefabricated rods to manufacture photonic crystal fiber is, peripheral capillary and stuffed quartz fiber fractionation rule are arranged closely in the periphery of microstructure area, then boundling penetrates quartzy outer tube and makes photon crystal optical fiber preformed rod, prefabricated rods is sent into high temperature smelting furnace, carry out photon crystal fiber drawing, in drawing process, malleation is added in central capillary endoporus, negative pressure is taken out in peripheral capillary with the hole of mixing arrange regional, central capillary endoporus is expanded the positive and negative pressure produced until the endoporus of peripheral capillary and the hole of mixing alignment area are eliminated completely, obtain the photonic crystal fiber that d/ λ value is greater than 90%.
The photonic crystal fiber that corresponding microstructure area shape is special, such as microstructure area is panda shape, bow tie etc., the periphery that the mixing peripheral capillary of arrange regional and stuffed quartz fiber subregion are arranged closely in microstructure area then boundling penetrates quartzy outer tube, the structure of the special-shaped photonic crystal fiber that described subregion draws as required divides, make photon crystal optical fiber preformed rod, prefabricated rods is sent into high temperature smelting furnace, carry out photon crystal fiber drawing, in drawing process, malleation is added in central capillary endoporus, negative pressure is taken out in peripheral capillary with the hole of mixing arrange regional, central capillary endoporus is expanded the positive and negative pressure produced until the endoporus of peripheral capillary and the hole of mixing alignment area are eliminated completely, under the positive/negative-pressure of drawing process, owing to mixing peripheral capillary and the arrangement of stuffed quartz fiber subregion of arrange regional, there is hole in the region of peripheral capillary, the impact that is stressed is shunk, in the region of stuffed quartz fiber, stuffed quartz fiber is not stressed impact, region is substantially constant, according to the region divided in advance, the central capillary of microstructure area expands, stuffed quartz zone of fiber is greater than at the expansion amplitude of peripheral capillary region, obtain the special-shaped photonic crystal fiber that microstructure area shape is special.
In order to explanation the present invention clearly, below in conjunction with enforcement and accompanying drawing, the present invention is further described, but should limit the scope of the invention with this.
Fig. 4 is the schema that the present invention makes photonic crystal fiber.First by mixing row silk design rule, outer tube is penetrated to boundling after each silica tube arrangement and make photon crystal optical fiber preformed rod.Afterwards prefabricated rods is sent into high temperature smelting furnace, carry out photon crystal fiber drawing.By controlling pressure reduction and the furnace temperature of positive/negative-pressure in drawing process, reach the object controlling to draw photonic crystal fiber d/ λ value, thus obtain the desired photonic crystal fiber of design.
Fig. 5 and Fig. 6 is the structural representation of the photon crystal optical fiber preformed rod of the embodiment of the present invention one, and this example is by mixing row silk method, makes d/ λ value and is greater than the photon crystal optical fiber preformed rod of 90% and draws photonic crystal fiber.The arrangement of mixing arrange regional can adjust the different shapes of the microstructure area at center.
Central capillary is the quartz capillary of internal diameter 160 μm of external diameters 500 μm, circular or the regular hexagon of rule close-packed arrays, as Fig. 6, or other symmetric figure structures, obtain microstructure area, the stuffed quartz fibre array 3 layers of 500 μm is used in microstructure area periphery first, use the peripheral capillary rule close-packed arrays of internal diameter 200 μm of external diameters 500 μm to quartzy outer tube internal diameter again, and supplement into the circle suitable with quartzy outer tube diameter of bore by the solid fibers that diameter is thinner, when the number of plies is hexagonal array herein, center is to the number of plies at angle, do not count for supplementing conglobate scattered kapillary, by microstructure area with mix arrange regional boundling, extract microstructure area center 7 capillary out, send in the outer tube of internal diameter 15mm external diameter 20mm, make prefabricated rods.This prefabricated rods is sent into high temperature smelting furnace, and after drawing, the photonic crystal fiber microstructure area obtained is sexangle, and periphery is the entirety after a melting.This photonic crystal fiber has larger d/ λ value compared with ordinary light photonic crystal fiber, because at the periphery of microstructure area kapillary, kapillary peripheral in pulling process takes out negative pressure, and middle kapillary adds malleation, just makes d/ λ value significantly increase.The stuffed quartz fiber of mixing region, when drawing process forms positive and negative pressure, gives one, central zone buffering, can reach the object preventing thin walled central kapillary to be out of shape.
Fig. 7 is the structural representation of the photon crystal optical fiber preformed rod of the embodiment of the present invention two.This example is by mixing row silk method, makes d/ λ value and is greater than the photon crystal optical fiber preformed rod of 90% and draws photonic crystal fiber.
Central capillary is the kapillary of internal diameter 180 μm of external diameters 500 μm, rule close-packed arrays becomes regular hexagon, obtain microstructure area, microstructure area periphery uses the peripheral capillary rule close-packed arrays of internal diameter 200 μm of external diameters 500 μm to outer tube internal diameter, and supplement into the circle suitable with outer tube diameter of bore with the stuffed quartz fiber that diameter is thinner, by microstructure area with mix arrange regional boundling, extract center 7 capillary out, send in the outer tube of internal diameter 15mm external diameter 20mm, make prefabricated rods.This prefabricated rods is sent into high temperature smelting furnace, and after drawing, the photonic crystal fiber obtained can have very large d/ λ value, because the expansion that the space in peripheral capillary is central microstructure region kapillary provides space.
Fig. 8 is the structural representation of the photon crystal optical fiber preformed rod of the embodiment of the present invention three.This example is by mixing row silk method, makes special-shaped photon crystal optical fiber preformed rod and draws photonic crystal fiber.
Central capillary is the kapillary of internal diameter 160 μm of external diameters 500 μm, rule close-packed arrays becomes regular hexagon, obtain microstructure area, microstructure area is peripheral with the stuffed quartz fiber of 500 μm and the peripheral capillary subregion rule close-packed arrays of internal diameter 200 μm of external diameters 500 μm, as shown in Figure 8, until suitable with outer tube internal diameter, and supplement into the circle suitable with outer tube diameter of bore by the solid fibers that diameter is thinner, by microstructure area with mix arrange regional boundling, extract center 7 capillary out, send in the outer tube of internal diameter 15mm external diameter 20mm, make prefabricated rods.In the present embodiment, make the special-shaped photonic crystal light that microstructure area is bow tie, according to the shape that will make, the subregion arrangement of design mixing arrange regional, as Fig. 8, four pieces of area arrangement are divided by peripheral capillary and stuffed quartz fiber, this prefabricated rods is sent into high temperature smelting furnace, malleation is added in central capillary endoporus, negative pressure is taken out in peripheral capillary with the hole of mixing arrange regional, central capillary endoporus is expanded the positive and negative pressure produced until the endoporus of peripheral capillary and the hole of mixing alignment area are eliminated completely, under the positive/negative-pressure of drawing process, owing to mixing peripheral capillary and the arrangement of stuffed quartz fiber subregion of arrange regional, the hole in peripheral capillary region is stressed to affect and shrinks, in the region of stuffed quartz fiber, stuffed quartz fiber is not stressed impact, according to the region divided in advance, the central capillary of microstructure area is greater than stuffed quartz zone of fiber at the expansion amplitude of peripheral capillary region, after drawing, microstructure area to the periphery capillary region expands, very little with stuffed quartz zone of fiber joint expansion amplitude, obtain the photonic crystal fiber that microstructure area shape is bow tie thus.
The present invention proposes the manufacturing process of a kind of prefabricated rods of photonic crystal fiber and the photonic crystal fiber of correspondence.Existing photonic crystal fiber is adopt the kapillary of uniform diameters and solid fibers row silk to make photon crystal optical fiber preformed rod substantially, wire drawing makes photonic crystal fiber again, this kind of requirement of processing method to kapillary, solid fibers is high, during drawing optical fiber, manufacture difficulty is large, material cost is high, and yield rate is low.The present invention proposes and adopt different diameter, dissimilar kapillary and solid fibers mixing row silk, make photon crystal optical fiber preformed rod, wire drawing makes the processing method of photonic crystal fiber, effectively can reduce the requirement to raw materials such as kapillaries, reduce technology difficulty, reduce material cost, improve yield rate, there is good Social benefit and economic benefit.
Claims (3)
1. photon crystal optical fiber preformed rod manufactures the method for photonic crystal fiber, it is characterized in that described photon crystal optical fiber preformed rod comprises microstructure area, mixing arrange regional and quartzy outer tube, the quartz capillary that microstructure area is closed by one end forms, the mixing quartz capillary closed by one end of arrange regional and stuffed quartz fibrous, the quartz capillary of microstructure area is called central capillary, the quartz capillary of mixing arrange regional is called peripheral capillary, central capillary, peripheral capillary and stuffed quartz fiber have identical external diameter, central capillary is different with peripheral capillary internal-and external diameter ratio, microstructure area with mix arrange regional boundling in the endoporus of quartzy outer tube, microstructure area is positioned at the geometric centre of mixing arrange regional, stuffed quartz fiber, peripheral capillary rule is arranged closely in the periphery of microstructure area, wherein mix the gap that the peripheral capillary of arrange regional and stuffed quartz fiber are formed, and in the gap of mixing arrange regional and quartzy outer tube, fill the thin stuffed quartz fiber of corresponding gap length,
The peripheral capillary rule of mixing arrange regional is arranged closely in the periphery of microstructure area, until touch quartzy outer tube, microstructure area with mix arrange regional set bunchy and penetrate quartzy outer tube and make photon crystal optical fiber preformed rod, prefabricated rods is sent into high temperature smelting furnace, carry out photon crystal fiber drawing, in drawing process, malleation is added in central capillary endoporus, negative pressure is taken out in peripheral capillary with the hole of mixing arrange regional, forming positive and negative pressure makes central capillary endoporus expand until the endoporus of peripheral capillary and the hole of mixing alignment area are eliminated completely, the photonic crystal fiber that obtained d/ λ value is greater than 90%.
2. photon crystal optical fiber preformed rod manufactures the method for photonic crystal fiber, it is characterized in that described photon crystal optical fiber preformed rod comprises microstructure area, mixing arrange regional and quartzy outer tube, the quartz capillary that microstructure area is closed by one end forms, the mixing quartz capillary closed by one end of arrange regional and stuffed quartz fibrous, the quartz capillary of microstructure area is called central capillary, the quartz capillary of mixing arrange regional is called peripheral capillary, central capillary, peripheral capillary and stuffed quartz fiber have identical external diameter, central capillary is different with peripheral capillary internal-and external diameter ratio, microstructure area with mix arrange regional boundling in the endoporus of quartzy outer tube, microstructure area is positioned at the geometric centre of mixing arrange regional, stuffed quartz fiber, peripheral capillary rule is arranged closely in the periphery of microstructure area, wherein mix the gap that the peripheral capillary of arrange regional and stuffed quartz fiber are formed, and in the gap of mixing arrange regional and quartzy outer tube, fill the thin stuffed quartz fiber of corresponding gap length,
The peripheral capillary of mixing arrange regional and stuffed quartz fiber fractionation alternately rule are arranged closely in the periphery of microstructure area, and boundling penetrates quartzy outer tube makes photon crystal optical fiber preformed rod, prefabricated rods is sent into high temperature smelting furnace, carry out photon crystal fiber drawing, in drawing process, malleation is added in central capillary endoporus, negative pressure is taken out in peripheral capillary with the hole of mixing arrange regional, forming positive and negative pressure makes central capillary endoporus expand until the endoporus of peripheral capillary and the hole of mixing alignment area are eliminated completely, the photonic crystal fiber that obtained d/ λ value is greater than 90%, stuffed quartz layer of fibers is used for preventing central capillary excessive deformation.
3. photon crystal optical fiber preformed rod manufactures the method for photonic crystal fiber, it is characterized in that described photon crystal optical fiber preformed rod comprises microstructure area, mixing arrange regional and quartzy outer tube, the quartz capillary that microstructure area is closed by one end forms, the mixing quartz capillary closed by one end of arrange regional and stuffed quartz fibrous, the quartz capillary of microstructure area is called central capillary, the quartz capillary of mixing arrange regional is called peripheral capillary, central capillary, peripheral capillary and stuffed quartz fiber have identical external diameter, central capillary is different with peripheral capillary internal-and external diameter ratio, microstructure area with mix arrange regional boundling in the endoporus of quartzy outer tube, microstructure area is positioned at the geometric centre of mixing arrange regional, stuffed quartz fiber, peripheral capillary rule is arranged closely in the periphery of microstructure area, wherein mix the gap that the peripheral capillary of arrange regional and stuffed quartz fiber are formed, and in the gap of mixing arrange regional and quartzy outer tube, fill the thin stuffed quartz fiber of corresponding gap length,
The periphery that the mixing peripheral capillary of arrange regional and stuffed quartz fiber subregion are arranged closely in microstructure area then boundling penetrates quartzy outer tube, the structure of the special-shaped photonic crystal fiber that described subregion draws as required divides, make photon crystal optical fiber preformed rod, prefabricated rods is sent into high temperature smelting furnace, carry out photon crystal fiber drawing, in drawing process, malleation is added in central capillary endoporus, negative pressure is taken out in peripheral capillary with the hole of mixing arrange regional, central capillary endoporus is expanded the positive and negative pressure produced until the endoporus of peripheral capillary and the hole of mixing alignment area are eliminated completely, under the positive/negative-pressure of drawing process, owing to mixing peripheral capillary and the arrangement of stuffed quartz fiber subregion of arrange regional, the regions contract of peripheral capillary, the region of stuffed quartz fiber is constant, according to the region divided in advance, the central capillary of microstructure area expands and obtains the special special-shaped photonic crystal fiber of microstructure area shape.
Priority Applications (1)
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| CN115784602A (en) * | 2022-12-08 | 2023-03-14 | 锐光信通科技有限公司 | Preparation method of quartz-based image transmission optical fiber and quartz-based image transmission optical fiber |
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