CN1824620A - Apparatus for fabricating optical fiber preform through external vapor deposition process - Google Patents
Apparatus for fabricating optical fiber preform through external vapor deposition process Download PDFInfo
- Publication number
- CN1824620A CN1824620A CNA2005101254716A CN200510125471A CN1824620A CN 1824620 A CN1824620 A CN 1824620A CN A2005101254716 A CNA2005101254716 A CN A2005101254716A CN 200510125471 A CN200510125471 A CN 200510125471A CN 1824620 A CN1824620 A CN 1824620A
- Authority
- CN
- China
- Prior art keywords
- burner
- primary preform
- preform rod
- burner assembly
- burners
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
-
- 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
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01413—Reactant delivery systems
- C03B37/0142—Reactant deposition burners
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/50—Multiple burner arrangements
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
- C03B2207/64—Angle
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Melting And Manufacturing (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Gas Burners (AREA)
Abstract
Disclosed is an apparatus for fabricating an optical fiber preform through an external vapor deposition process. The apparatus includes a lathe on which a primary preform is rotatably mounted by chucks, a burner assembly including a burner installation block having an inclined surface and a plurality of burners installed on the inclined surface of the burner installation block in such a manner that the burners spray flames and source gas towards the primary preform with mutually different spraying angles, and a carrier unit for moving the burner assembly lengthwise along the primary preform.
Description
Technical field
The present invention relates to be used to make the device of preform.More particularly, the present invention relates to be used for making the device of preform by external vapor deposition process.
Background technology
Preform is handled through drawing, and is used to make the optical fiber as the fiber-optic communications traffic line.
On or synthetic quartz pipe natural, carry out the primary preform rod that inner vapor deposition process obtains having rod,, can make preform by to primary preform rod surrounding layer (over-cladding) in large size.More particularly, preform can be made through external vapor deposition process, and wherein cigarette ash (soot) passes through source gas oxidation is formed under hot conditions, and then around the deposit of primary prefabricated rods.
This vapor deposition process is divided into: inner vapor deposition process, and wherein the high-temperature zone is formed in the silica tube and the cigarette ash that produces by oxidation source gas is deposited in the high-temperature area; And external vapor deposition process, the primary preform rod that wherein has a rod be heated and the cigarette ash of oxidation around the deposit of primary preform rod.
According to inner vapor deposition process, the high-temperature zone is formed in the silica tube, is oxidized to cigarette ash so that introduce the source gas of silica tube, and because thermophoretic effect, cigarette ash is deposited on the inwall of silica tube.
According to external vapor deposition process, source gas and flame are injected on the primary preform rod, so that cigarette ash can center on the deposit of primary preform rod simultaneously along the plasma jet mobile.The exercise question of authorizing George etc. has disclosed external vapor deposition process the 4th, 486, No. 212 in detail for the United States Patent (USP) of " devitrification suppresses flame hydrolysis to be handled ".According to the process of George, utilize single burner, cigarette ash is deposited on the exterior circumferential part of primary preform rod.Primary preform rod and secondary prefabricated rods are used as " soot preform ".Yet single burner only produces the cigarette ash of limited quantity, and cigarette ash can not be along longitudinally evenly deposit of soot preform.In order to address the above problem, proposed to use the external vapor deposition process of a plurality of burners.
Use the external steam deposition apparatus of a plurality of burners to improve equipment cost, and feasible manipulation and the repairing external steam deposition apparatus of being difficult to.Particularly can produce between the flame that burner produces and disturb, thereby reduce the characteristic such as the preform of deposition rate, density and outward appearance of preform.
Summary of the invention
Therefore, by a kind of apparatus and method that are used to make preform with the interferential advantageous characteristic between the flame that prevents a plurality of burners generations are provided, the present invention can solve and appear at the problems referred to above of the prior art, and other advantage is provided.
In one embodiment, provide a kind of device that is used for making by external vapor deposition process preform, this device comprises: the primary preform rod utilizes chuck to be rotatably installed in lathe on it; Burner assembly, described burner assembly comprises: the burner block with inclined surface; With a plurality of burners, a plurality of burners are installed on the inclined surface of burner block, so as burner with the spray angle ground that differs from one another to primary preform rod injection source gas and flame; With the carrier unit that is used for vertically moving burner assembly along the primary preform rod.
Description of drawings
By following detailed description, above-mentioned feature and advantage of the present invention will be clearer in conjunction with the accompanying drawings.
Fig. 1 is the view that is used for making by external vapor deposition process the device of preform that shows one embodiment of the present of invention;
Fig. 2 is the synoptic diagram that shows the structure of burner assembly shown in Fig. 1;
Fig. 3 is the synoptic diagram that shows the structure of the burner assembly that has four burners in accordance with another embodiment of the present invention; With
Fig. 4 is the synoptic diagram that shows the structure of the burner assembly with three burners of another embodiment according to the present invention.
Embodiment
Below, embodiments of the invention are described with reference to the accompanying drawings.For clear and simple purpose because the detailed description of known function and structure can make theme of the present invention unintelligible, add here known function and the detailed description of structure will be omitted.
Fig. 1 shows the view that is used for making by external vapor deposition process the device 100 of preform according to an embodiment of the invention.
As shown in the figure, this device 100 comprises: lathe (lathe) 110, primary preform rod 101 utilize chuck 111a and 111b rotatably to be supported on the lathe 110; Burner assembly 120, burner assembly 120 comprise a plurality of burners 122 that are used for around primary preform rod 101 injection source gas and flame; With the carrier unit 160 that is used for vertically moving burner assembly 120 along primary preform rod 101.Primary preform rod 101 comprises the high purity glass with predetermined refraction.When making preform, cigarette ash is around 101 deposits of primary preform rod.
Fig. 2 is the synoptic diagram that shows burner assembly shown in Fig. 1 120 in detail.As shown in the figure, burner assembly 120 comprises: with the burner block with inclined surface 121 of primary preform rod 101 relative arrangements; Be installed in a plurality of burners 122 on the inclined surface of burner block 121 with the obliquity that differs from one another; Be used for source gas is fed to the pipe 130 of burner 122; Be used for controlling first mass flow controller 132 of the source tolerance that is fed to burner 122; Second mass flow controller 133 with the amount that is used to control combustion gases.
This source gas bag draw together be fed in the burner such as SiCl
4Precursor material (precursormaterial) fuel gas so that make burner generate flame and oxygen (O
2).Source gas is fed in each burner 122.Burner 122 produces flame, and because the reaction between flame and the oxygen, precursor material is oxidized to cigarette ash (SiO
2).Cigarette ash is gradually along the 101 vertical deposits of primary preform rod, and grows up with the form of soot preform 102, thus the formation preform.
Burner 122 is installed on the inclined surface of burner block 121, so that burner 122 can be perpendicular to the inclined surface jet flow stream and the flame of burning mounting blocks 121.Therefore, even the distance between the burner 122 narrows down, flame can the phase mutual interference yet.In addition, cigarette ash can vertically spray in large area along primary preform rod 101, so that can improve the deposition rate of cigarette ash.
Refer again to Fig. 1, carrier unit 160 comprises: stepper-motor 163; With soot preform 102 abreast, be connected to the ball-screw 161 of stepper-motor 163 through a pair of unitor 162; The ball-screw piece 164 that moves according to the rotation of the ball-screw 161 that drives by stepper-motor 163, along ball-screw 161; Be installed on the lathe 110, with stepper-motor 163 relative back-up blocks 167 with back-up roller ballscrew 161; Be connected to the cylinder 165 of ball-screw piece 164; And the spring 166 between cylinder 165 and burner assembly 120.
Ball-screw 161 is formed with a plurality of screw threads, is sent to ball-screw piece 164 with the motivating force with stepper-motor 163.Correspondingly, ball-screw piece 164 can move abreast along ball-screw 161 and cigarette ash primary preform rod 102.
In addition, ball-screw piece 164 is connected to cylinder 165 and the spring 166 of burner assembly 120 is installed on it.Or rather, burner assembly 120 utilizes ball-screw piece 164 along 102 longitudinal motions of primary preform rod.At this moment, the distance between burner assembly 120 and the primary preform rod 102 can be regulated by using cylinder 165 and spring 166.For regulating the distance between burner assembly 120 and the soot preform 102, also can provide the ball-screw assembly or the straight line guide assembly that comprise stepper-motor.
Burner assembly 120 shown in Fig. 2 oxidized glass precursor under hot conditions, thus SiO formed
2Cigarette ash.Glass precursor and combustion gas are introduced in the pipe 130 that is arranged in burner assembly 120 belows.Combustion gas comprise can by with O
2Reaction produces the CH of thermal-flame
4Or hydrogen.
In order to control the mass rate of introducing the glass precursor in the burner shown in Fig. 2, comprise SiCl
4Container be heated improving vapor pressure, and then, 132 operations of first mass flow controller are with the mass rate of feed glass precursor.Except first mass flow controller 132, also can use the flow director based on pressure of the internal pressure that can directly control container, or can be according to the differential pressure flow controller of the pressure reduction controlling quality flow in the container.
For prevent when glass precursor by the burner shown in feed-in Fig. 2 in the time active SiCl
4Vapour condensation (condensation) needs to guarantee to be held in the condition of high temperature.In addition, carrier gas can be used in and easily transmits steam.Carrier gas comprises O
2, Ar or He.Utilize independent controller 131, carrier gas is by in the feed-in burner assembly 120.
The device 100 of making preform also can comprise and be used to collect and discharge the not oxidized collector unit 135 that becomes a part of source gas of cigarette ash being used to shown in Fig. 1.
Fig. 3 be show the burner assembly 120 that has four burners in accordance with another embodiment of the present invention ' the synoptic diagram of structure.As shown in the figure, burner assembly 120 ' comprising: have the burner block 121 of inclined surface '; Be installed in the angle that differs from one another burner block 121 ' inclined surface on four burners 122 '.
In addition, the method that is used to make preform comprises the steps: to rotate and utilizes chuck 111a and 111b rotatably to be supported on primary preform rod 101 on the lathe 110; Move burner assembly 120 from an end of primary preform rod 101 to the other end; With produce flame by the combustion gases in the pipe 130 feed-in burner assemblies 120 that use bottom through being connected to burner assembly 120.
Primary preform rod 101 has about 20 and arrives the external diameter of 40mm and about 1000 to 1600mm length.Preferably, primary preform rod 101 is made by having about 1200 to 1400mm the high purity glass of length.By using such as SiCl
4, GeCl
4, POCl
3, C
2F
6Or Cl
2At least two kinds of precursors and be used to control refractive index materials, the specific refractory power of high purity glass can be adjusted to the level of expectation.
Work as SiCl
4With the pipe 130 of the bottom of carrier gas through being connected to burner assembly 121 by in the feed-in burner assembly 121 time, pass through SiCl
4With from the flame oxidation reaction between the flame of burner 122 generations, SiCl
4Be oxidized to cigarette ash (SiO
2).Cigarette ash is deposited on the primary preform rod 101.
Or rather, because thermophoretic effect, cigarette ash is deposited on the surface of primary preform rod 101, and the soot formation soot preform 102 of deposit.Here, thermophoretic effect is represented the phenomenon of high temperature particle to the cryogenic particle motion.
Owing to the present invention includes a plurality of burners 122 with mutual different obliquitys, therefore the flame that produces from burner 122 can be ejected on the primary preform rod 101 with different spray angles, the miles of relative movement of cigarette ash can be extended like this, thereby causes the raising of deposition rate.
Or rather, burner 122 is installed on the inclined surface, arranges perpendicular to inclined surface simultaneously, and the obliquity of burner 122 depends on the curvature or the bending of the inclined surface of burner block 121 like this.
Fig. 4 is the synoptic diagram that shows and have three burners 122 in accordance with another embodiment of the present invention the structure of " burner assembly 120 ".As shown in the figure, the longitudinal axis of three burners 122 " at least one perpendicular to primary preform rod 101 " is arranged, and the burner of remaining burner 122 " with respect to perpendicular to primary preform rod 101 " is arranged with about 0 to 15 ° obliquity.If the obliquity of burner significantly departs from above-mentioned scope, cigarette ash 102 " deposition rate can descend.Therefore, the obliquity of burner (angle 1 and angle 2) can be same to each other or different to each other.
If the number deficiency of burner 122, the deposition rate of unit time can descend.In contrast, if be provided with too many burner 122, cigarette ash just can not be deposited on the primary preform rod equably.
When burner assembly 120 along ball-screw 161 longitudinal motions the time, the external diameter of primary preform rod can increase owing to the deposit of cigarette ash, and the distance between soot preform 102 and the burner 122 just narrows down like this.Therefore, interference occurs, thereby reduced the deposition rate of cigarette ash by meeting between the flame of burner 122 generations.
According to the present invention, burner assembly 120 can utilize cylinder 165 and spring 166 at a predetermined velocity along the downward direction vertical movement, so can keep the distance between soot preform 102 and the burner 122 consistently.Preferably, burner assembly 120 moves in downward direction with 0.01 to the 0.1mm/ speed of dividing.More preferably, burner assembly 120 moves in downward direction with 0.03 to the 0.07mm/ speed of dividing.
Device 100 of the present invention can improve the deposition rate of cigarette ash and make the preform that has less than 0.5% outside diameter tolerance.The preform of manufacturing is transmission (transparently) sintering in having 1500 ℃ the high-temperature electric resistance furnace of surpassing, and accepts to draw in draw tower to handle.
The device that is used to make preform comprises can increase the amount of the oxidation cigarette ash that is deposited on the primary preform rod like this with the spray angle injection source gas that differs from one another and a plurality of burners of flame.Therefore, can improve the oxidizing reaction of source gas of unit time and the deposition rate of cigarette ash.In addition, can make not oxidized and the amount of source gas waste is minimum.In addition, because a plurality of burners are formed integral body with the form of burner assembly, therefore can reduce its installing space.
According to the present invention, to primary preform rod jet flames, so that can prevent interference between the flame, and preform has homogeneous thickness to burner with different spray angles.Therefore, the device that is used to make preform according to the present invention can improve the deposition rate of cigarette ash, the use of source gas and the life-span of burner.
Though illustrate and described the present invention with reference to certain preferred embodiment of the present invention, but those skilled in the art will understand: under the situation that does not deviate from the definite the spirit and scope of the present invention of claims, this embodiment can carry out the change of various ways and details.
Claims (18)
1. one kind is used to use external vapor deposition process to make the device of preform, and described device comprises:
Lathe, primary preform rod utilize chuck to be rotatably installed on the lathe;
Burner assembly, this burner assembly comprises: the burner block with inclined surface; With a plurality of burners, these a plurality of burners are installed on the inclined surface of burner block, so as burner with the spray angle that differs from one another to primary preform rod injection source gas and flame; With
Be used for along the primary preform rod carrier unit of mobile burner assembly longitudinally.
2. device according to claim 1, wherein carrier unit comprises: stepper-motor; Be connected to the ball-screw of stepper-motor through unitor with the relation parallel with the primary preform rod; The ball-screw piece that when ball-screw is rotated by stepper-motor, moves along ball-screw; With the back-up block that relatively is installed in for back-up roller ballscrew and stepper-motor on the lathe.
3. device according to claim 1, wherein: a plurality of pipes are introduced in the burner block and with burner and are connected, and are used for source gas is infeeded burner.
4. device according to claim 1, wherein the source gas bag is drawn together SiCl
4, be used to produce the fuel gas of flame and oxygen.
5. device according to claim 1 also comprises the device that is used to collect with discharge unit source gas.
6. device according to claim 4, wherein burner block comprises the amount of mass flow director that is used for controlling the source gas that is fed to each pipe.
7. device according to claim 1, wherein for different spray angles along the vertical jet flames of primary preform rod, burner is installed on the inclined surface of burner block with the obliquity that differs from one another.
8. device according to claim 1, wherein burner assembly comprises at least two burners.
9. device according to claim 1, wherein at least two of burner with respect to primary preform rod about 0 to 15 ° angle that tilts.
10. device according to claim 1, wherein at least one of burner arranged perpendicular to the longitudinal axis of primary preform rod.
11. device according to claim 1, wherein burner is mutually the same with respect to the obliquity of primary preform rod.
12. device according to claim 1, wherein burner differs from one another with respect to the angle of primary preform rod.
13. device according to claim 1 also comprises the controller that is used for carrier gas is fed to burner assembly.
14. one kind is used to use external vapor deposition process to make the device of preform, described device comprises:
Lathe, primary preform rod utilize chuck to be rotatably installed on the lathe;
Burner assembly, this burner assembly comprises: the burner block with inclined surface; With a plurality of burners, these a plurality of burners are installed on the inclined surface of burner block, so as burner with the spray angle that differs from one another to primary preform rod injection source gas and flame; With
Be used for along the primary preform rod longitudinally or perpendicular to the primary preform carrier unit of mobile burner assembly excellently.
15. device according to claim 14, wherein carrier unit comprises: the cylinder that is connected to the ball-screw piece; And the spring between cylinder and burner assembly.
16. device according to claim 14, wherein burner assembly arrives the speed of 0.1mm/ branch perpendicular to the primary preform rod motion with about 0.01.
17. device according to claim 14, wherein the dynamic load unit comprises ball-screw driven by stepper motors or straight line conductor.
18. device according to claim 14 also comprises the controller that is used for carrier gas is fed to burner assembly.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20050015163 | 2005-02-23 | ||
| KR200515163 | 2005-02-23 | ||
| KR200534481 | 2005-04-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1824620A true CN1824620A (en) | 2006-08-30 |
Family
ID=36935490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005101254716A Pending CN1824620A (en) | 2005-02-23 | 2005-11-17 | Apparatus for fabricating optical fiber preform through external vapor deposition process |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100630117B1 (en) |
| CN (1) | CN1824620A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106892555A (en) * | 2017-02-15 | 2017-06-27 | 天津富通集团有限公司 | The manufacturing process of large-scale optical fiber prefabricating stick |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101695400B1 (en) * | 2015-11-03 | 2017-01-23 | 주식회사 아론 | Manufacturing device for optical fiber preform |
| KR102243400B1 (en) | 2019-11-15 | 2021-04-22 | 주식회사 에스티아이 | Core rod mounting device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001048550A (en) | 1999-07-30 | 2001-02-20 | Sumitomo Electric Ind Ltd | Apparatus and method for producing porous glass preform |
| JP2002338256A (en) | 2001-05-11 | 2002-11-27 | Sumitomo Electric Ind Ltd | Method and apparatus for manufacturing glass particulate deposit |
-
2005
- 2005-04-26 KR KR1020050034481A patent/KR100630117B1/en active IP Right Grant
- 2005-11-17 CN CNA2005101254716A patent/CN1824620A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106892555A (en) * | 2017-02-15 | 2017-06-27 | 天津富通集团有限公司 | The manufacturing process of large-scale optical fiber prefabricating stick |
| CN106892555B (en) * | 2017-02-15 | 2019-05-24 | 天津富通集团有限公司 | The manufacturing process of large-scale optical fiber prefabricating stick |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060094002A (en) | 2006-08-28 |
| KR100630117B1 (en) | 2006-09-27 |
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