CN202849258U - Structure of photonic crystal optical fiber preform - Google Patents
Structure of photonic crystal optical fiber preform Download PDFInfo
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- CN202849258U CN202849258U CN2012204852774U CN201220485277U CN202849258U CN 202849258 U CN202849258 U CN 202849258U CN 2012204852774 U CN2012204852774 U CN 2012204852774U CN 201220485277 U CN201220485277 U CN 201220485277U CN 202849258 U CN202849258 U CN 202849258U
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- inner sleeve
- kapillary
- optical fiber
- crystal optical
- outer tube
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—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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- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The utility model discloses a structure of a photonic crystal optical fiber preform. The structure is spliced and built into an inner sleeve pipe by a hollow capillary tube, and at least two of quartz tubes which are nested with each other are respectively taken as the inner sleeve pipe and an outer sleeve pipe of a photonic crystal optical fiber capillary tube. The inner sleeve pipe and the outer sleeve pipe, which are nested with each other, are completely sealed with each other and not communicated with each other, and the inner sleeve pipe and the outer sleeve pipe are respectively remained with a pressure through hole capable of being connected with a pressure controller. The pressures in the inner sleeve pipe and the outer sleeve pipe are respectively controlled by the pressure through holes when a wire is drawn on the photonic crystal optical fiber preform in a pressuring way, so that the pressure applied to the inner part of the capillary tube and the outer part of the capillary tube generates a pressure difference. The quartz tubes which are nested with each other, not communicated with each other, and respectively remained with the pressure through hole, are respectively taken as the inner sleeve pipe and the outer sleeve pipe of the photonic crystal optical fiber capillary tube, so that the diameter change condition of the capillary tube can be flexibly and accurately controlled, the change condition of the size of gaps among the capillary tubes can be further controlled, and the complex structure of a photonic crystal optical fiber can be easily realized.
Description
Technical field
The utility model belongs to the photonic crystal fiber technology, particularly a kind of photon crystal optical fiber preformed rod structure.This prefabricated rods structure is applicable to the photonic crystal fiber of all wire drawings of need to pressurizeing.
Background technology
The preparation technology of photonic crystal fiber tiles kapillary or silk to form prefabricated rods in silica tube first, and then prefabricated rods is drawn into optical fiber through high-temperature fusion on wire-drawer-tower.But in the process of high temperature wire drawing, the microstructure that kapillary tiles can deform, and change has just occured for the original project organization of photonic crystal fiber and performance like this.Guarantee size, the structure that tiles structure and kapillary itself capillaceous be very important and difficulty very high.Application number is that 200410042623.1 Chinese patent discloses a kind of method and employed device of the method for preparing photonic crystal fiber, at first in the glass bushing of specific dimensions, capillary array gone out specific structure, form photon crystal optical fiber preformed rod, and then by specific device preform is carried out pressure-controlling, namely glass bushing is vacuumized, passes in the kapillary gas of certain air pressure.This patent vacuumizes and can kapillary be merged mutually when the high temperature wire drawing glass bushing, relative position is stable, the gas that passes into certain air pressure in kapillary can be controlled size capillaceous, but the pressure in the vacuum of extracapillary and the kapillary is easier to be caused and capillaceously bursts, be out of shape, and it is large to install operation easier.Implementing this patent requires jack diameter, position and number on vacuum (-tight) housing and the slotting dish consistent with the photonic crystal arrangement mode in the needed optical fiber, the general kapillary that forms a photon crystal optical fiber preformed rod has the hundreds of root, operation easier is well imagined, and each specific photonic crystal fiber all will design with it corresponding vacuum (-tight) housing and insert dish of preparation, can not adapt to the flexible and changeable characteristic of photonic crystals optical fiber structure.
In sum, the complicated process of preparation of photon crystal optical fiber preformed rod, technical difficulty is high, and the photon crystal optical fiber preformed rod structure with excellent specific property of Design Theory is difficult to be drawn into actual fiber.
Summary of the invention
The purpose of this utility model is to disclose a kind of photon crystal optical fiber preformed rod structure, this photon crystal optical fiber preformed rod adopts hollow kapillary to tile in inner sleeve, and adopts at least two mutually nested silica tubes as photonic crystal fiber internal and external casing capillaceous.Each does not communicate mutually nested silica tube junction complete closed, and internal and external casing is all reserved respectively the pressure communication mouth that can be connected with pressure controller.The photon crystal optical fiber preformed rod of this structure can be controlled respectively the pressure in the internal and external casing when follow-up pressurization wire drawing, act in the kapillary and the pressure of extracapillary generation pressure difference thereby make.Adopt mutually nested, each does not communicate, reserves respectively the silica tube of pressure communication mouth as photonic crystal fiber internal and external casing capillaceous, can flexibly, accurately control the changing conditions of capillary diameter, can also control simultaneously the changing conditions of pore size between the kapillary, realize easily the complex construction of photonic crystal fiber.
The technical scheme that the utility model is taked is: a kind of photon crystal optical fiber preformed rod structure, it is characterized in that: comprise kapillary, inner sleeve, the silica tube of top seal, inner sleeve pressure communication mouth, outer tube and outer tube pressure communication mouth, described kapillary is some and tiles in inner sleeve, kapillary upper surface and inner sleeve upper surface are at grade, quartz fiber is filled in gap between them, fibre core is left in the kapillary central position, kapillary top and inner sleeve top overall fusion form one, the capillary heating that is stretched out by the inner sleeve lower end forms capillary bundle, the lower surface of the silica tube of described top seal and the upper surface of inner sleeve fuse the formation one, and inner sleeve pressure communication mouth is left in the side at the silica tube of top seal, described outer tube is nested by the capillary bundle lower end, outer tube lower surface and capillary bundle lower surface are at grade, quartz fiber is filled in gap between them, outer tube pressure communication mouth is left in the side of outer tube, and sealing is merged respectively in outer sleeve upper face and lower surface.
The beneficial effect that the utility model produces is: adopt the photon crystal optical fiber preformed rod of this structure when follow-up pressurization wire drawing, by controlling respectively the pressure in the internal and external casing, can flexibly, accurately control the changing conditions of capillary diameter, can also control simultaneously the changing conditions of pore size between the kapillary, realize easily the complex construction of photonic crystal fiber.
Description of drawings
Fig. 1 is kapillary and structural representation after inner sleeve is nested.
Fig. 2 is the structural representation after inner sleeve and kapillary alignment end merge.
Fig. 3 is the structural representation at external sealing inner sleeve top.
Fig. 4 is and prefabricated rods structural representation after outer tube is nested.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described further.
With reference to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the photon crystal optical fiber preformed rod structure comprises kapillary 1, inner sleeve 2, the silica tube 6 of top seal, inner sleeve pressure communication mouth 7, outer tube 8 and outer tube pressure communication mouth 9, kapillary 1 tiles in inner sleeve 2 for some, kapillary 1 upper surface and inner sleeve 2 upper surfaces are at grade, quartz fiber 5 is filled in gap between them, fibre core 3 is left in kapillary 1 central position, kapillary 1 top and inner sleeve 2 top overall fusions form one, the kapillary 1 that is stretched out by inner sleeve 1 lower end adds thermosetting capillary bundle 4, the lower surface of the silica tube 6 of top seal and the upper surface of inner sleeve 2 fuse the formation one, and inner sleeve pressure communication mouth 7 is left in the side at the silica tube 6 of top seal, outer tube 8 is nested by capillary bundle 4 lower ends, outer tube 8 lower surfaces and capillary bundle 4 lower surfaces are at grade, quartz fiber 5 is filled in gap between them, outer tube pressure communication mouth 9 is left in the side of outer tube 8, and sealing is merged respectively in outer tube 8 upper surfaces and lower surface.
The preparation process of photon crystal optical fiber preformed rod is as follows:
(1). kapillary is nested with inner sleeve
Adopt a silica tube as the inner sleeve 2 of kapillary 1, kapillary 1 length is greater than inner sleeve 2 length; Kapillary 1 is cut into some according to certain-length, the photon crystal structure required according to photonic crystal fiber tiles some capillaries 1 in inner sleeve 2, fibre core 3 is reserved in the central position, alignd at grade mutually with the upper end of inner sleeve 2 in the upper end of kapillary 1, the lower end of some capillaries 1 forms capillary bundle 4 and stretches out the inner sleeve lower end, and the kapillary 1 of homogeneous end and the gap between the inner sleeve 2 are closely filled up with quartz fiber 5.
(2). the fusion of kapillary and inner sleeve
The inner sleeve 2 of alignment end is heated to soft state together with kapillary 1, make between the kapillary 1 in the certain-length scope and merge between kapillary 1 and the inner sleeve 2, simultaneously the capillary bundle 4 of stretching out the other end is pressurizeed, can not receive reality to guarantee the hollow of kapillary 1.
(3). external sealing inner sleeve top
At the silica tube 6 of the external one section sealing in inner sleeve 2 tops of alignment end, and reserve an inner sleeve pressure communication mouth 7 in the side of external silica tube 6.
(4). inner sleeve is nested together with kapillary and outer tube
Adopt a silica tube as outer tube 8 capillaceous, outer tube 8 length are greater than inner sleeve 2 length, outer tube 8 internal diameters equal inner sleeve 2 external diameters, one end that will stretch out capillary bundle 4 is packed in the outer tube 8, the degree of depth of packing into arrives kapillary 1 with the upper end of outer tube 8 and is as the criterion with the position that inner sleeve 2 merges, and the lower surface that makes simultaneously outer tube 8 and the lower surface of the capillary bundle 4 of stretching out are at grade; Tamp with quartz fiber 5 gap between the lower end of outer tube 8 and the capillary bundle 4.
(5). the closed outer casing pipe
To seal with outer tube 8 upper surfaces of inner sleeve 2 socket places, an outer tube pressure communication mouth 9 is reserved in the side of outer tube 8, and the lower surface sealing of outer tube 8 forms photon crystal optical fiber preformed rod.
The external diameter of the kapillary 1 of this structure is 0.5 ~ 3mm.Some capillaries 1 adopt the kapillary of same inner diameter, perhaps adopt the kapillary of two or more different inner diameters.The shape of kapillary 1 adopts a kind of in sexangle or the circle.The length of kapillary 1 is 150 ~ 300mm, and inner sleeve 2 length are 100-250mm.The length of kapillary 1 top and inner sleeve 2 top overall fusions is 30-60mm.
Embodiment one: the preparation of kagome type hollow-core photonic crystal fiber prefabricated rods
(1). be that 0.8mm, external diameter are that the circular capillaries of 1.0mm is that 200mm cuts according to length with internal diameter, according to the rounded projections arranged structure they are tiled in inner sleeve, fibre core is left in the central position, and the inner sleeve internal diameter is 15mm, external diameter is 18mm, and length is 100mm.The other end of kapillary 1 forms capillary bundle 5 and stretches out inner sleeve, and intercapillary space keeps, and the space between kapillary and the inner sleeve is closely filled up with quartz fiber, and kapillary, quartz fiber align with an end of inner sleeve.
(2). the inner sleeve of the end that will align is softening together with capillary heating, and heated length is 30mm, and the other end suitably adds the pressure of 5 holders to the capillary bundle of stretching out.
(3). connect the long silica tube of one section 40mm at alignment end top, the silica tube top seal, a diameter 1cm, the inner sleeve pressure communication mouth of long 2cm are reserved in the silica tube side.
(4). inner sleeve is stretched out the capillary bundle end internal diameter 18mm that packs into, in the outer tube of external diameter 22mm, long 180mm, the degree of depth of packing into is as the criterion with the upper end arrival kapillary of outer tube and the position of inner sleeve fusion, the lower surface of the lower surface that makes simultaneously outer tube and the capillary bundle of stretching out at grade, tamp with quartz fiber the gap between outer tube lower end and the capillary bundle.
(5). will with the outer sleeve upper face of inner sleeve socket place with oxyhydrogen flame thermoplastic rear enclosed, a diameter 1cm, the outer tube pressure communication mouth of long 2cm are reserved in the side of outer tube.The lower surface of outer tube forms photon crystal optical fiber preformed rod with oxyhydrogen flame thermoplastic rear enclosed.
With the photon crystal optical fiber preformed rod for preparing on wire-drawer-tower through 1960 ℃ of high temperature wire drawings, drawing speed is controlled at 10m/s, the pressure-controlling of inner sleeve is in 10 holders, and the pressure-controlling of outer tube is in 12 holders, and can be drawn into external diameter is the kagome type hollow-core photonic crystal fiber of 125 μ m.
Embodiment two: the preparation of double clad Yb-doped photon crystal optical fiber prefabricated rods
(1). be that 0.5mm, external diameter are that 1.2mm and internal diameter are that 0.8mm, external diameter are that two kinds of sexangle kapillaries of 1.2mm are that 300mm cuts according to length with internal diameter, according to the double clad structure (internal diameter little tile inner cladding region, internal diameter is large tiles outer cladding region) they are tiled in inner sleeve according to the honeycomb type arrangement architecture, fibre core is left in the central position, inner sleeve internal diameter 21mm, external diameter 25mm, length is 150mm.The other end capillaceous forms capillary bundle and stretches out inner sleeve, and the space between intercapillary space and kapillary and the inner sleeve is all closely filled up with quartz fiber, and kapillary, quartz fiber align with an end of inner sleeve.
(2). the inner sleeve of the end that will align is softening together with capillary heating, and heated length is 30mm, and the other end suitably adds the pressure of 6 holders to the capillary bundle of stretching out.
(3). connect the long silica tube of one section 40mm at alignment end top, the silica tube top seal, a diameter 1cm, the inner sleeve pressure communication mouth of long 2cm are reserved in the silica tube side.
(4). inner sleeve is stretched out the capillary bundle end pack in the outer tube of an internal diameter 25mm, external diameter 29mm, long 280mm, the degree of depth of packing into is as the criterion with the upper end arrival kapillary of outer tube and the position of inner sleeve fusion, the lower surface of the lower surface that makes simultaneously outer tube and the capillary bundle of stretching out at grade, tamp with quartz fiber the gap between outer tube lower end and the capillary bundle.
(5). will with the outer sleeve upper face of inner sleeve socket place with oxyhydrogen flame thermoplastic rear enclosed, a diameter 1cm is reserved in the outer tube side, the pressure communication mouth of long 2cm, the lower surface of outer tube forms photon crystal optical fiber preformed rod with oxyhydrogen flame thermoplastic rear enclosed.
With the photon crystal optical fiber preformed rod for preparing on wire-drawer-tower through 1980 ℃ of high temperature wire drawings, drawing speed is controlled at 6m/s, the pressure-controlling of inner sleeve is in 16 holders, and the pressure-controlling of outer tube is in 3 holders, and can be drawn into external diameter is the double clad Yb-doped photon crystal optical fiber of 400 μ m.
Claims (6)
1. photon crystal optical fiber preformed rod structure, it is characterized in that: comprise kapillary (1), inner sleeve (2), the silica tube of top seal (6), inner sleeve pressure communication mouth (7), outer tube (8) and outer tube pressure communication mouth (9), described kapillary (1) tiles in inner sleeve (2) for some, kapillary (1) upper surface and inner sleeve (2) upper surface are at grade, quartz fiber (5) is filled in gap between them, fibre core (3) is left in kapillary (1) central position, kapillary (1) top and inner sleeve (2) top overall fusion form one, the kapillary (1) that is stretched out by inner sleeve (2) lower end adds thermosetting capillary bundle (4), the upper surface of the lower surface of the silica tube of described top seal (6) and inner sleeve (2) fuses the formation one, and inner sleeve pressure communication mouth (7) is left in the side at the silica tube (6) of top seal, described outer tube (8) is nested by capillary bundle (4) lower end, outer tube (8) lower surface and capillary bundle (4) lower surface are at grade, quartz fiber (5) is filled in gap between them, outer tube pressure communication mouth (9) is left in the side of outer tube (8), and sealing is merged respectively in outer tube (8) upper surface and lower surface.
2. photon crystal optical fiber preformed rod structure according to claim 1 is characterized in that, the external diameter of described kapillary 1 is 0.5 ~ 3mm.
3. photon crystal optical fiber preformed rod structure according to claim 1 is characterized in that, described some capillaries 1 adopt the kapillary of same inner diameter, perhaps adopts the kapillary of two or more different inner diameters.
4. photon crystal optical fiber preformed rod structure according to claim 1 is characterized in that, the shape of described kapillary (1) adopts a kind of in sexangle or the circle.
5. photon crystal optical fiber preformed rod structure according to claim 1 is characterized in that, the length of described kapillary (1) is 150 ~ 300mm, and inner sleeve (2) length is 100-250mm.
6. photon crystal optical fiber preformed rod structure according to claim 1 is characterized in that, the length of described kapillary (1) top and inner sleeve (2) top overall fusion is 30-60mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204852774U CN202849258U (en) | 2012-09-21 | 2012-09-21 | Structure of photonic crystal optical fiber preform |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012204852774U CN202849258U (en) | 2012-09-21 | 2012-09-21 | Structure of photonic crystal optical fiber preform |
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| CN202849258U true CN202849258U (en) | 2013-04-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190322566A1 (en) * | 2018-04-18 | 2019-10-24 | Lawrence Livermore National Security, Llc | Method for fabrication of sleeveless photonic crystal canes with an arbitrary shape |
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2012
- 2012-09-21 CN CN2012204852774U patent/CN202849258U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190322566A1 (en) * | 2018-04-18 | 2019-10-24 | Lawrence Livermore National Security, Llc | Method for fabrication of sleeveless photonic crystal canes with an arbitrary shape |
| US11787727B2 (en) * | 2018-04-18 | 2023-10-17 | Lawrence Livermore National Security, Llc | Method for fabrication of sleeveless photonic crystal canes with an arbitrary shape |
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| GR01 | Patent grant | ||
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Granted publication date: 20130403 |