CN101659516A - Method of preparing base material for optical fiber - Google Patents
Method of preparing base material for optical fiber Download PDFInfo
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- CN101659516A CN101659516A CN 200910159491 CN200910159491A CN101659516A CN 101659516 A CN101659516 A CN 101659516A CN 200910159491 CN200910159491 CN 200910159491 CN 200910159491 A CN200910159491 A CN 200910159491A CN 101659516 A CN101659516 A CN 101659516A
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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
- C03B37/014—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
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- 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
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
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- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
The invention relates to a method of preparing a base material for an optical fiber, characterized in that the method includes: a glass microparticles generating step of blowing out an oxyhydrogen flame containing glass raw gas from a blast burner to generate glass microparticles and a stacking step of stacking the generated glass microparticles at the external circumstance of a target, in at least one part of stacking step, a shaft line of the blast burner is departed from the center of the target, the glass microparticles non-adhering on the target are discharged from an exhaust port clamping the target and arranged at one side opposite to the blast burner.
Description
Technical field
The present invention relates to be used to make the method for high-quality fibre parent material.
Background technology
Generally speaking, the manufacturing of the base glass material of optical fiber purposes, Vapor phase axial deposition method), (the external vapor deposition method: the porous glass base material made of cigarette ash (soot) method carries out sintering and carries out the method for transparent glassization the OVD method Outside Vapor Deposition method) etc. known to VAD method (vapor phase axial deposition:.
Utilize the manufacturing of the porous glass base material of OVD method, used following method, that is, and with silicon tetrachloride (SiCl
4), germanium tetrachloride (GeCl
4) wait glass raw material gas and hydrogen or oxygen gas to offer blowtorch, through both hydrolysis reaction and the synthetic glass particulate, make this glass granules adhere to, be deposited in target and (be equivalent to fibre parent material, be meant porous glass base material, its start-up portion) periphery on method, described target with the opposed position of blowtorch on rotate.The chamber that this target and blowtorch are equipped with venting port surrounds, discharges such as the combustion gases that produce from described venting port will be made, non-glassivation particulate.
Form by exhaust air suction through regular meeting in the described chamber and press the air-flow that is brought, constitute according to the mode of not discharged effectively attached to the non-glassivation particulate on the target.Yet a part of glass granules can't be discharged from venting port fully, attached on the chamber inner wall face, perhaps is suspended in the chamber sometimes sometimes.These glass granules in chamber, have the possibility that is attached to again on the target as non-glassivation microparticle residue.In this case, the conduct in fibre parent material of non-glassivation particulate is steeped, foreign matter is residual, can cause intensity to reduce, lose increase etc. when optical fiber fabrication, the problem of reliability reduction of generation optical fiber and so on.
At this problem, the spy opens flat 8-198635 communique and discloses by being provided with in chamber and induce the mechanism that discharges non-glassivation particulate, suppresses non-glassivation particulate to the adhering to again of target, can produce high-quality glass base material for optical fiber.
In addition, the spy opens flat 9-124334 communique and discloses by making the exhaust air suction in the chamber press the accumulated growth along with porous glass base material to increase, thereby suppresses non-glassivation particulate to the adhering to again of target, can produce high-quality glass base material for optical fiber.
Open in the flat 8-198635 communique in the disclosed technology the spy, be envisioned that to have and suppress the effect that non-glassivation particulate was expressed to adhering to again of target etc.Yet, because the complex structure of device, so be difficult to reduce cost.And, even used the technology of inducing discharge, on principle, also non-glassivation particulate all can not be discharged.And then, causing owing to accumulated growth under the situation of target chap, the generation of non-glassivation particulate also increases, therefore can't exhaust and the glass granules that adheres to again also increases, but the method for tackling this problem is not but opened in the flat 8-198635 communique the spy and is write exactly.
Open in the disclosed technology of flat 9-124334 communique the spy, can be contemplated to have and to suppress the effect that non-glassivation particulate was expressed to adhering to again of target etc.Yet,, on principle, also non-glassivation particulate all can not be discharged even be that exhaust air suction is pressed with the elevated pressures.And the pressure that exhaust air suction is pressed is set at when higher, the control of the air-flow difficulty that becomes in the chamber.And then, in the target accumulated growth and under the situation of chap, the generation of non-glassivation particulate also increases, for this reason, can't exhaust and the glass granules that adheres to again also increase, but the method for tackling this problem is not opened in the flat 9-124334 communique the spy and is write exactly.
Among Fig. 4 A and Fig. 4 B, an example of the manufacture method of porous matter fibre parent material in the prior art is shown.Reference marks 101 expression gas blowtorch, 102 torch flame, 103 of representing to contain the gas particulate are represented the venting port of bar-shaped target, 104 expression chambers, 105 expression chambers.At target 103 and when rotating around central shaft, adhere to, be deposited in the periphery of target 103 from the gas particles of gas blowtorch 101 ejections, and then the length direction opposing parallel ground of gas blowtorch 101 and target 103 moves several, make porous matter fibre parent material thus.
Shown in Fig. 4 A, in the manufacture method of porous matter fibre parent material, when glass granules began to deposit, the external diameter of target 103 was thin, so spray in the mode of the peripheral part that wraps into target 103 at its leading section 102a from the flame that contains glass granules 102 of gas blowtorch 101 ejection.For this reason, in the front of target 103 be that the gas blowtorch side of target 103 is not adhered to and the glass granules that rebounds is less.But, along with sedimentary progress, in the deposition latter half shown in Fig. 4 B, target 103 accumulated growths, its external diameter chap, therefore the flame that contains glass granules 102 from 101 ejections of gas blowtorch sprays in the mode that hides target 103.For this reason, do not adhere in the front of target 103 and the ratio of the glass granules that rebounds increases.
In recent years, in order to reduce the manufacturing cost of optical fiber, there is the trend that maximizes in porous matter fibre parent material, and also the external diameter than existing fibre parent material is thick for the porous matter fibre parent material of usefulness OVD manufactured.For this reason, exist in sedimentary latter half, the trend that increases at the non-glassivation particulate that rebounds previously of target 103.And then the target 103 of chap can hinder the deflated air-flow.For this reason, in the existing manufacture method shown in Fig. 4 A and Fig. 4 B, existence can't fully be discharged non-glassivation particulate, can not fully suppress the problem of again adhering to of glass granules to porous matter fibre parent material.
By above background as can be known, under the situation that base glass material maximizes, that is, than under the big situation of the flame of blowtorch radiation, non-glassivation particulate enlarges markedly as the fibre parent material of target, and for this reason, the technology of adhering to again that suppresses non-glassivation particulate is essential.
Summary of the invention
The present invention finishes in view of foregoing, and its purpose is, also can suppress the fibre parent material manufacture method of adhering to, can make high-quality fibre parent material again of non-glassivation particulate even provide a kind of fibre parent material to maximize.
The manufacture method of the fibre parent material of an embodiment of the invention possesses: the oxyhydrogen flame that contains glass raw material gas is sprayed and the glass granules that generates glass granules generates step and make the glass granules of generation be deposited in accumulation step on the periphery of target from blowtorch; In at least a portion of described accumulation step, the center that makes the axis direction of described blowtorch depart from described target; In described glass granules, will be not attached to the non-glassivation particulate on the described target in described accumulation step, discharge from described target of clamping and the relief outlet that is arranged on an opposite side with described blowtorch.
In the manufacture method of this fibre parent material, in described accumulation step, can make the angle that described axis became of line and described blowtorch at the described center of the center that connects described blowtorch leading section and described target, recur variation corresponding to the accumulated growth of described target.
In the manufacture method of this fibre parent material, in described accumulation step, can make the angle that described axis became of line and described blowtorch at the described center of the center that connects described blowtorch leading section and described target, change interimly corresponding to the accumulated growth of described target.
In the manufacture method of this fibre parent material, can move the described center that makes the described axis direction of described blowtorch depart from described target by at least one side who makes described blowtorch and described target.
In the manufacture method of this fibre parent material, with the line that connects the described center of the center of described blowtorch leading section and described target be made as blowtorch angle a with the angle that described axis became of described blowtorch, when the line that will be connected the described center of the described center of described leading section of described blowtorch and described target is made as target tangential angle b with the angle that tangent line became of the described target of drawing from the described center of the described leading section of described blowtorch, in described accumulation step, can when keeping a≤b relation, make described target accumulated growth.
In the manufacture method of this fibre parent material, in described target, the sense of rotation of piling up described glass granules one side can be identical direction with the direction that the described axis direction of described blowtorch departs from the described center of described target.
In the manufacture method of this fibre parent material, the exhaust airstream that is used to discharge described non-glassivation particulate can become from piling up the described relief outlet adnation of described glass granules one side direction.
In the manufacture method of in the past fibre parent material, in order to improve deposition efficiency, the axis direction of blowtorch is always towards the center of target.
Yet the inventor finds, by the center that the axis direction that makes blowtorch departs from target, can suppress the generation of the glass granules that returns from target missile, and target can not hinder the deflated air-flow, and non-glassivation particulate can be discharged to venting port effectively.
That is, in the manufacture method of fibre parent material of the present invention, can suppress glass granules to the adhering to again of target, and can be manufactured on inner bubble, the high-quality fibre parent material of few foreign.
In addition, the inventor confirmed, carries out and under the situation as the fibre parent material chap of target, even the axis direction of blowtorch departs from the center of target, deposition efficiency also can change hardly in deposition.
Therefore, even implement the manufacture method of fibre parent material of the present invention, the usage quantity of manufacturing time, raw material is also constant, can carrying cost, productivity.
Description of drawings
Fig. 1 is the pie graph of the position relation between target, blowtorch and the chamber in the embodiment of expression manufacture method of the present invention.
Fig. 2 is the target in the embodiment of expression manufacture method of the present invention and the explanatory view of the relation of the angle position between the axis of blowtorch.
Fig. 3 A～D is an explanatory view of representing angle position relation and the growth of target between the axis of target in the embodiment of manufacture method of the present invention and blowtorch in the lump.State when state the when state when state when Fig. 3 A and Fig. 3 C represent that the accumulated growth of the target in the 1st example begins and target growth ending, Fig. 3 B and Fig. 3 D represent that the accumulated growth of the target in the 2nd example begins and target growth ending.
Fig. 4 A is the target of the manufacturing initial stage in the manufacture method of representing in the past and the explanatory view of the relation of the position between the blowtorch, and Fig. 4 B is the target of the manufacturing tail end in the manufacture method of representing in the past and the explanatory view of the relation of the position between the blowtorch.
Embodiment
Below, with reference to accompanying drawing, an example of the manufacture method of the fibre parent material among the present invention is described.
Fig. 1 is the explanatory view that is used to illustrate an embodiment of manufacture method of the present invention.
In Fig. 1, reference marks 1 expression gas blowtorch, the 2 blowtorch flames, 3 of representing to contain glass granules are represented the venting port of bar-shaped target, 4 expression chambers, 5 expression chambers.In the central authorities of chamber 4, bar-shaped target 3 is configured to and can rotates freely around its central shaft.In the side of target 3, blowtorch 1 is configured to the side of its leading section 1a towards the side face of target 3.At the ejiction opening of the leading section 1a of blowtorch 1 formation oxyhydrogen flame, contain oxyhydrogen flame 23 ejections of unstripped gas from this ejiction opening towards target, described unstripped gas is from the illustrated unstripped gas supply source of the omission that is connected with blowtorch 1.
Need to prove, in Fig. 1, show the cut-away section of bar-shaped target 3, dispose blowtorch 1 on the right side of target 3.Around chamber 4 covering targets 3 and the blowtorch 1.In addition, in the side face of target 3, will be with blowtorch 1 an opposed side during as the front 3a side of target 3, be provided with the venting port 5 of chamber 4 in the back side of target 3 3b side.
Inside at this chamber 4, generate the exhaust airstream that brings because of from the exhaust air suction pressure of venting port 5, after making target 3 growths, the exhaust gas of generation and non-glassivation particulate can promptly be discharged from venting port 5 being ejected into the side face of target 3 from the oxyhydrogen flame that contains unstripped gas 2 of blowtorch 1 ejection.
In the inside of chamber 4, when target 3 centered on its rotation, the glass granules that is generated by the unstripped gas that sprays from blowtorch 1 adhered to and is deposited on the periphery of target 3, and then as required, blowtorch 1 is at the relatively parallel mobile several of the length direction of target 3.Thus, make target 3, make fibre parent material (porous glass base material) around its growth on every side.Among Fig. 1, described target 3 and be in by the state of horizontal supporting, but can be vertically control, level controls, and then can be to tilt to control to wait in any setting that rotates freely in chamber towards controlling, in the present invention, target 3 is not particularly limited towards, sense of rotation.
In the manufacture method of the fibre parent material of present embodiment, the center that makes the axis direction direction of blowtorch 1 ejection flame 2 (that is, from) of blowtorch 1 depart from target 3.Thus, suppress because of the flame 2 of blowtorch 1 in the rebound generation of the non-glassivation particulate that produced of the periphery of target 3, do not hinder at target 3 under the situation of the air-flow that arrives venting port 5, non-glassivation particulate is discharged to venting port 5 effectively.
About the axis direction of blowtorch 1, be preferably the sense of rotation of front 3a side of the target 3 that the oxyhydrogen flame 2 of relative blowtorch 1 sprays and the center of departing from target 3.Thus, make based on the travel direction of the outside surface of the target 3 of rotation consistently, so can more effectively carry out the exhaust of non-glassivation particulate with the gas flow direction.
In addition, the center of departing from target 3 by the axis direction that makes blowtorch 1 under the situation that the extension 2a side from the oxyhydrogen flame that contains glass granules 2 of blowtorch 1 ejection is not hidden by target 3, is extended and is sprayed in the one-sided mode of the periphery that wraps into target 3.For this reason, the front 3a side that can be suppressed at target 3 is not adhered to and the generation of the glass granules that rebounds.In addition, approach the direction of the exhaust airstream in the chamber from the direction of the oxyhydrogen flame 2 of blowtorch 1 ejection, non-glassivation particulate can not take place for this reason attached to the inner-wall surface of chamber 4 or in the situation of chamber 4 inner suspensions, but can effectively non-glassivation particulate be discharged from venting port 5.
That is, as shown in Figure 1, the extension 2a of oxyhydrogen flame 2 extends towards upper face side from the front 3a side of target 3, covers the front 3a of target 3 and a top part.And then the exhaust airstream 4a of the upper face side of target 3 is along this extension 2a, and flows along the periphery of target 3, towards venting port 5 sides.Consequently, non-glassivation particulate can not be attached on the target 3 again, and is discharged efficiently.Thus, can suppress non-glassivation particulate adhering to again to fibre parent material.
Fig. 2 is the explanatory view that is used to illustrate an example of the axis of blowtorch 1 when implementing manufacture method of the present invention and the angular relation between the target 3.
In the present invention, to connect the line 1A of the center of leading section 1a of blowtorch 1 and the center O of target 3, the angle that become with the center of leading section 1a by blowtorch 1 and the straight line m (extended line of the central axis of blowtorch 1) that prolongs abreast with the axis direction of blowtorch 1 as blowtorch angle a, when connecting the line 1A of the center of leading section 1a of blowtorch 1 and the center O of target 3, the angle that become with the tangent line n of the target 3 of drawing, preferably satisfy the relation of a≤b as target tangential angle b from the center of the leading section 1a of blowtorch 1.That is, preferably keeping under the state of this relation, carrying out the accumulation of glass granules target 3.
During greater than target tangential angle b, the oxyhydrogen flame 2 of blowtorch 1 can not sprayed target 3 at blowtorch angle a, and the deposition efficiency of glass granules reduces.
By making glass granules make sedimentary the carrying out of target 3 growths attached to the periphery of target 3, the chap gradually of the external diameter of target 3, therefore the suitableeest blowtorch angle a with respect to the center O of target 3 also changes gradually.Therefore, preferably the accumulated growth along with target 3 changes blowtorch angle a, when target 3 is thin, reduces blowtorch angle a, and when target 3 is thick, increases blowtorch angle a.The variation of blowtorch angle a also can change continuously or interimly along with the accumulated growth of target 3.
Need to prove,, under the situation of the panning angle of controlling blowtorch 1, in the mechanism of supporting blowtorch 1, oscillating mechanism is set and gets final product for the travel mechanism of blowtorch 1.In addition, parallel the moving or the position of blowtorch 1 when moving of carrying out blowtorch 1, can suitably use platform (stage) is set in the mechanism of supporting blowtorch 1 waits also transportable structure.
Fig. 3 A～D represents an example of variation in the embodiment of manufacture method of fibre parent material of the present invention, blowtorch angle a.Need to prove, in common OVD method, be certain mode along with the accumulated growth of target 3 according to the distance between the surface of the target 3 that blowtorch 1 and oxyhydrogen flame 2 sprayed, and the position of blowtorch 1 and target 3 is changed.
In the present embodiment, except this change in location, move the blowtorch angle a that makes with respect to the center O of target 3 by at least one side who makes blowtorch 1 and target 3 and change.
For describing for the method that blowtorch angle a is changed in target 3 accumulated growths.In the 1st example shown in Fig. 3 A and Fig. 3 C, growth with target 3, the position that makes target 3 is by moving shown in the arrow E of Fig. 3 A, according to the distance between the surface of the target 3 that makes blowtorch 1 and spray from the oxyhydrogen flame 2 of blowtorch 1 is that certain mode is carried out position adjustments, blowtorch 1 is rotated shown in the arrow F of Fig. 3 C, make interim ground of blowtorch angle a or little by little variation, thereby make the periphery of oxyhydrogen flame 2 facing to target 13.
In addition, in the 2nd example shown in Fig. 3 B and Fig. 3 D, pre-configured blowtorch 1 is so that its axis direction departs from some from the sense of rotation that the shifting axle 3c of target 3 goes up the front face side of relative target 3 a little, when the growth of target 3 is piled up, the position of target 3 is moved shown in the arrow E of Fig. 3 B, according to the distance between the surface of the target 3 that makes blowtorch 1 and spray from the oxyhydrogen flame 2 of blowtorch 1 is certain mode, carry out position adjustments, blowtorch angle a is relatively changed, thereby make oxyhydrogen flame 2 be ejected into the periphery of target 13.
Use the direction-controlling method of the blowtorch 1 shown in Fig. 3 A and Fig. 3 C, perhaps the arbitrary method in the direction-controlling method of the blowtorch 1 shown in Fig. 3 B and Fig. 3 D can obtain based on effect of the present invention.That is 3 situations that hinder exhaust airstreams that hit that can prevent to grow.In addition, by making non-glassivation particulate be discharged to venting port 5, the generation of the glass granules that can suppress to rebound effectively.Consequently, glass granules can be suppressed, inner bubble, the high-quality fibre parent material of few foreign can be manufactured on to the adhering to again of target 3.
＜embodiment 〉
Will be as the silicon tetrachloride (SiCl of glass raw material gas
4) gas flow is made as 5.5～7.5SLM (L/ minute), hydrogen flowing quantity is made as 40～100SLM, oxygen flow is made as 15～40SLM, will be made as 1SLM as the argon flow amount of sealed gas, and each gas is offered blowtorch.Oxyhydrogen flame is sprayed to target from this blowtorch, make glass granules, make the target growth at the target surface sediment.
As the target of initial member, used the silica glass pole of external diameter φ 40mm.Long axis direction configuration at target amounts to 10 blowtorch, makes glass granules pile up multilayer in the target periphery, 50 of the porous glass base materials of making φ 250 * 1500mm.Wherein, according to the blowtorch angle that makes when beginning deposition be 0 °, blowtorch angle when deposition is finished is 0.8 * b=21 ° mode, in deposition process, make blowtorch that certain angle takes place and change, thereby make fibre parent material.In addition, the deflated flow velocity from venting port is 3.0m/sec.
The porous glass base material that sintering utilizes above manufacture method to make carries out transparent glassization and makes fibre parent material.For this fibre parent material, visual observation surface or inner bubble, the number and the counting of foreign matter.Consequently, the bubble of each root mother metal, production of foreign matters number average out to are 0.6.In addition, the deposition efficiency average out to 54% of the glass granules of present method.
＜comparative example 〉
In the manufacture method of fibre parent material of the present invention, make blowtorch angle in the deposition process be always 0 ° (axis direction that makes blowtorch is always towards center of target), in addition, under the condition identical, make 50 of porous glass base materials with top embodiment.To carry out transparent glassization with the porous glass base material sintering of this method making, thereby make fibre parent material.For this fibre parent material, visual observation surface or inner bubble, the number and the counting of foreign matter.Consequently, the bubble of each root mother metal, production of foreign matters number average out to are 5.2.In addition, the deposition efficiency average out to 55% of the glass granules of present method.
About the manufacture method shown in the top embodiment, by making the blowtorch axis direction depart from the center of target, can be suppressed at that the target front is not adhered to and the generation of the glass granules that rebounds, and discharge non-glassivation particulate effectively, therefore can reduce non-glassivation particulate adhering to again to target.Consequently, the bubble of fibre parent material, the number of foreign matter are compared with the method shown in the comparative example, have obviously reduced.
In addition, the deposition efficiency of embodiment and comparative example is compared, can confirm that the deposition efficiency of glass granules does not almost change.
Can be clear and definite from above result, by implementing manufacture method of the present invention, under the situation that the deposition efficiency that does not make glass granules reduces, in other words, do not make under the situation of making the efficient reduction, can be manufactured on surface or inner bubble, the high-quality fibre parent material of few foreign.
More than, preferred implementation of the present invention is illustrated, but the invention is not restricted to these embodiment.In the scope that does not break away from purport of the present invention, what can constitute adds, omits, replaces and other changes.The invention is not restricted to the qualification of above-mentioned explanation, and only limit to the claimed scope of the application.
Claims (7)
1, a kind of manufacture method of fibre parent material wherein, possesses:
The glass granules that the oxyhydrogen flame that contains glass raw material gas is sprayed from blowtorch and generate glass granules generate step and
Make the glass granules of generation be deposited in the accumulation step of the periphery of target,
In at least a portion of described accumulation step, the center that makes the axis direction of described blowtorch depart from described target,
In described glass granules, will be not attached to the non-glassivation particulate on the described target in described accumulation step, discharge from described target of clamping and the relief outlet that is arranged on an opposite side with described blowtorch.
2, the manufacture method of fibre parent material according to claim 1, wherein,
In described accumulation step, make the angle that described axis became of line and described blowtorch at the described center of the center that connects described blowtorch leading section and described target, variation continuously corresponding to the accumulated growth of described target.
3, the manufacture method of fibre parent material according to claim 1, wherein,
In described accumulation step, make the angle that described axis became of line and described blowtorch at the described center of the center that connects described blowtorch leading section and described target, change corresponding to the accumulated growth of described target interimly.
4, the manufacture method of fibre parent material according to claim 1, wherein,
By at least one side in described blowtorch and the described target is moved, the described center that makes the described axis direction of described blowtorch depart from described target.
5, the manufacture method of fibre parent material according to claim 1, wherein,
With connect the described center of the center of described blowtorch leading section and described target line, be made as blowtorch angle a with the angle that described axis became of described blowtorch, with connect the line at the described center of the described center of described leading section of described blowtorch and described target, when being made as target tangential angle b with the angle that tangent line became of the described target of drawing from the described center of the described leading section of described blowtorch
In described accumulation step, when keeping the relation of a≤b, make described target accumulated growth.
6, the manufacture method of fibre parent material according to claim 1, wherein,
In described target, the sense of rotation of piling up described glass granules one side is identical direction with the direction that the described axis direction of described blowtorch departs from the described center of described target.
7, the manufacture method of fibre parent material according to claim 1, wherein,
Be used to discharge the exhaust airstream of described non-glassivation particulate from piling up the described relief outlet adnation one-tenth of described glass granules one side direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008-216752 | 2008-08-26 | ||
| JP2008216752A JP5264369B2 (en) | 2008-08-26 | 2008-08-26 | Optical fiber preform manufacturing method |
| JP2008216752 | 2008-08-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101659516A true CN101659516A (en) | 2010-03-03 |
| CN101659516B CN101659516B (en) | 2013-06-12 |
Family
ID=41787800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910159491 Active CN101659516B (en) | 2008-08-26 | 2009-07-14 | Method of preparing base material for optical fiber |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5264369B2 (en) |
| CN (1) | CN101659516B (en) |
| RU (1) | RU2410338C1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61236627A (en) * | 1985-04-10 | 1986-10-21 | Furukawa Electric Co Ltd:The | Accumulating method for fine glass grain |
| JPH0393642A (en) * | 1989-09-04 | 1991-04-18 | Fujikura Ltd | Production of porous glass preform for optical fiber |
| JPH03141133A (en) * | 1989-10-25 | 1991-06-17 | Fujikura Ltd | Production of porous glass matrix for optical fiber |
| CN1138713C (en) * | 1997-12-26 | 2004-02-18 | 住友电气工业株式会社 | Method and apparatus for manufacturing optical fiber base material |
| US20040055339A1 (en) * | 2001-06-15 | 2004-03-25 | Tomohiro Ishihara | Method for producing glass-particle deposited body |
| CN1273399C (en) * | 2002-10-23 | 2006-09-06 | 株式会社神户制钢所 | Fibre-optical base material manufacturing device |
-
2008
- 2008-08-26 JP JP2008216752A patent/JP5264369B2/en active Active
-
2009
- 2009-06-18 RU RU2009123316/03A patent/RU2410338C1/en not_active IP Right Cessation
- 2009-07-14 CN CN 200910159491 patent/CN101659516B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP5264369B2 (en) | 2013-08-14 |
| CN101659516B (en) | 2013-06-12 |
| RU2410338C1 (en) | 2011-01-27 |
| JP2010052956A (en) | 2010-03-11 |
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