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CN106007357A - Manufacturing apparatus and manufacturing method of optical fiber master batch - Google Patents

Manufacturing apparatus and manufacturing method of optical fiber master batch Download PDF

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Publication number
CN106007357A
CN106007357A CN201610182385.7A CN201610182385A CN106007357A CN 106007357 A CN106007357 A CN 106007357A CN 201610182385 A CN201610182385 A CN 201610182385A CN 106007357 A CN106007357 A CN 106007357A
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CN
China
Prior art keywords
reaction vessel
optical fiber
interior monitoring
air supply
supply opening
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
Application number
CN201610182385.7A
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Chinese (zh)
Inventor
今田宽
内山圭祐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujikura Ltd
Original Assignee
Fujikura Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujikura Ltd filed Critical Fujikura Ltd
Publication of CN106007357A publication Critical patent/CN106007357A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01Manufacture of glass fibres or filaments
    • C03B37/012Manufacture of preforms for drawing fibres or filaments
    • C03B37/014Manufacture 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]
    • C03B37/01406Deposition reactors therefor
    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01Manufacture of glass fibres or filaments
    • C03B37/012Manufacture of preforms for drawing fibres or filaments
    • C03B37/014Manufacture 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]
    • C03B37/018Manufacture 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
    • C03B37/01807Reactant delivery systems, e.g. reactant deposition burners
    • C03B37/01815Reactant deposition burners or deposition heating means

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

A manufacturing apparatus and a manufacturing method of an optical fiber master batch. The manufacturing apparatus is provided with: a reaction container, a target arranged therein, a combustor which is disposed in the reaction container and stacks glass particles on the target; an interior monitoring window which is arranged on the side wall of the reaction container, a gas supply port for supplying gas to the reaction container; and an exhaust apparatus for exhausting gas from the reaction container. The gas supply port, the interior monitoring window and the exhaust apparatus are formed in a manner that the gas flows from the gas supply port, passes through nearby the surface of the interior monitoring window through the inner side of the reaction container, is fed into the reaction container and is discharged out.

Description

The manufacture device of fibre parent material and the manufacture method of fibre parent material
Technical field
The present invention relates to the manufacture method of optical fiber manufacturing plant material and fibre parent material.
Background technology
As the method for the mother metal manufacturing optical fiber, it is known to VAD method, external method.
Fig. 4 is the brief configuration representing the existing optical fiber manufacturing plant material employing VAD method Vertical sectional view.
As shown in Figure 4, optical fiber manufacturing plant material 101 possesses reaction vessel 110, is arranged at Target parts 120 in reaction vessel 110 and for from the front end of target parts 120 towards axially Fibre core burner 130 and the covering burner 140 of glass granules is piled up in lower section.Additionally, make With in the existing optical fiber manufacturing plant material of external method, it is not provided with fibre core burner 130, Only possesses covering burner 140.
Target parts 120 are the bar-shaped parts being such as made up of quartz, and to extend along vertical Mode be arranged in reaction vessel 110.Target parts 120 are supported in via maintaining part 121 Post 122.Post 122 be provided with make target parts 120 around post 122 central axis rotate and The not shown driving means moved along central axial direction.Fibre core burner 130 is for from target The front end of parts 120 becomes the glass granules of fibre core and to generate fibre core prefabricated towards piling up axially below The burner of rod S1.Covering burner 140 is for being piled in the periphery of core preform S1 The burner of covering prefabricated rods S2 is generated for the glass granules of covering.By from target parts 120 Front end towards generating core preform S1 and covering prefabricated rods S2 axially below, manufacture light Fine porous mother metal S (hreinafter referred to as porous mother metal S).The porous mother metal S produced is via base Processed and clear glassization in heating process and become fibre parent material.Further, giving After the covering of not enough needs, by pulling fibre parent material to manufacture optical fiber.
Additionally, existing optical fiber manufacturing plant material 101 is placed in and possesses not shown supply and fill Put in the base station 150 of (gas supply mechanism) and exhaust apparatus 170.Additionally, only illustrate at Fig. 4 The table top of base station 150.From the extraneous air of feeder importing from fibre core burner 130 with anti- Answer the gap between container 110 and the gap between covering burner 40 and reaction vessel 10 In entrance reaction vessel.Further, enter extraneous air in reaction vessel by exhaust apparatus 170 from Reaction vessel 110 is discharged.Thus, it is retained as negative pressure in reaction vessel.So make extraneous air Circulation is to prevent gas in reaction vessel, glass granules etc. from spilling outside reaction vessel, no Reduce the deposition efficiency of fibre parent material.
The inside of manufacture state for monitoring porous mother metal S it is provided with at optical fiber manufacturing plant material Monitor with window 180.The production of raw material for use gas of oxygen, hydrogen and porous mother metal in reaction vessel Body that is chloride gas are hydrolyzed reaction, generate glass granules.And, the glass generated Microgranule is not piled up in the glass granules of front end of target parts 120 at reaction vessel as prefabricated rods Inside swim and be attached to reaction vessel inner surface afterwards.Certain inner surface at interior monitoring window is also It is attached with glass granules, therefore cannot observe porous exactly by fuzzy interior monitoring window female The manufacture state of material S.The problem that accordingly, there exist the quality that cannot guarantee manufactured porous mother metal.
Patent documentation 1: Japanese Unexamined Patent Publication 2005-8498 publication
Summary of the invention
The present invention produces in view of this existing practical situation, its object is to provide one Suppress the inner side of glass granules internally supervision window with can not reducing the deposition efficiency of prefabricated rods Surface attachment such that it is able to observe the porous mother metal accumulation process from interior monitoring window exactly Manufacture state, and then be able to ensure that manufactured fibre parent material quality fibre parent material manufacture dress Put.
The optical fiber manufacturing plant material of the 1st aspect of the present invention possesses: reaction vessel;Target parts, It is configured in above-mentioned reaction vessel;And burner, its in above-mentioned reaction vessel to above-mentioned Target parts pile up glass granules.Above-mentioned reaction vessel is arranged and is arranged at above-mentioned reaction vessel The interior monitoring window of sidewall, in above-mentioned reaction vessel supply gas air supply opening and by upper State the exhaust apparatus that gas in reaction vessel is discharged, with the flowing of above-mentioned gas from above-mentioned air supply opening By the near surface of the above-mentioned interior monitoring window of the inner side of above-mentioned reaction vessel, and it is being imported into The mode being discharged after in above-mentioned reaction vessel, constitutes above-mentioned air supply opening, above-mentioned interior monitoring use Window and above-mentioned exhaust apparatus.
Above-mentioned air supply opening can also be arranged near above-mentioned interior monitoring window.
Above-mentioned air supply opening can also be by being arranged at the peristome of above-mentioned reaction vessel and with in covering State between the mode of peristome is arranged between the above-mentioned interior monitoring window of above-mentioned reaction vessel Gap is constituted.
Above-mentioned interior monitoring window can also be arranged at and fill to above-mentioned aerofluxus with from above-mentioned air supply opening The almost parallel side of flowing of the air-flow put.
The manufacture method of the fibre parent material of the 2nd aspect of the present invention uses the light of above-mentioned first method Fine base metal manufacturing device, makes above-mentioned gas pass through above-mentioned air supply opening and pass through the interior of above-mentioned reaction vessel The above-mentioned near surface of the above-mentioned interior monitoring window of side, thus manufactures fibre parent material.
The optical fiber manufacturing plant material of aforesaid way and the manufacturer of fibre parent material in the present invention In method, it is possible to suppression glass granules internally monitors and adheres to the inner surface of window and do not reduce prefabricated The deposition efficiency of rod such that it is able to the manufacture shape of the porous mother metal in observation accumulation process exactly State, and then it is able to ensure that the quality of manufactured fibre parent material.
Accompanying drawing explanation
Fig. 1 is the lead of the brief configuration of the optical fiber manufacturing plant material representing embodiments of the present invention Hang down sectional view.
Fig. 2 A is the inside prison of the optical fiber manufacturing plant material of the first embodiment representing the present invention Depending on the vertical sectional view by the brief configuration of window.
Fig. 2 B is the inside prison of the optical fiber manufacturing plant material of the first embodiment representing the present invention Depending on the front view by the brief configuration of window.
Fig. 3 A is the inside prison of the optical fiber manufacturing plant material representing second embodiment of the present invention Depending on the vertical sectional view by the brief configuration of window.
Fig. 3 B is the inside prison of the optical fiber manufacturing plant material representing second embodiment of the present invention Depending on the front view by the brief configuration of window.
Fig. 4 is the vertical sectional view of the brief configuration representing existing optical fiber manufacturing plant material.
Description of reference numerals:
1 ... optical fiber manufacturing plant material;10,110 ... reaction vessel;20,120 ... target parts;22、 122 ... post (rigid element);30,130 ... fibre core burner (burner);40,140 ... bag Grate firing burner (burner);50,151 ... base station;70,170 ... exhaust apparatus;80、81… Interior monitoring window;90,91 ... air supply opening;11,111 ... air vent (exhaust apparatus).
Detailed description of the invention
Hereinafter, referring to the drawings the optical fiber manufacturing plant material of the present invention is described in detail.This Outward, for the accompanying drawing used in the following description, in order to easily determine inventive feature, And for convenience of description, enlarged representation becomes the part of major part sometimes, each element Dimensional ratios etc. are not necessarily identical with reality.
< the first embodiment >
Fig. 1 is to represent the optical fiber manufacturing plant material 1 employing VAD method in present embodiment Vertical sectional view.Additionally, the paper above-below direction in Fig. 1 is vertical.
Optical fiber manufacturing plant material 1 is to manufacture optical fiber porous mother metal S (hreinafter referred to as " porous Mother metal S ") device.As it is shown in figure 1, optical fiber manufacturing plant material 1 possess reaction vessel 10, Target parts 20, fibre core burner (Core burner) 30 (burner), covering burner 40 (burner), base station (Booth) 50, not shown feeder (gas supply mechanism) and Exhaust apparatus 70.The inside prison for monitoring fibre parent material it is provided with in the side of reaction vessel 10 Depending on using window 80.Interior monitoring window 80 utilizes bolt etc. to be fixed in the side of reaction vessel 10. Alternatively, it is also possible to by make interior monitoring window 80 to rotate and in the way of opening and closing, use hinge The top of reaction vessel 10 with interior monitoring window 80 is connected.Interior monitoring window 80 is by resistance to Hot strengthening glass, quartz glass etc. are formed.
Manufactured porous mother metal S is contained in the inside of reaction vessel 10 by reaction vessel 10.? Reaction vessel 10 is provided with air vent 11.Air vent 11 is for by reaction vessel 10 The blow vent that gas is discharged towards outside.Reaction vessel 10 is formed by aluminum.
Target parts 20 are to extend and be arranged at the bar-shaped portion in reaction vessel 10 along vertical Part.It addition, from the front end of target parts 20 towards piling up porous mother metal S axially below.Such as make Target parts 20 are made with quartz.Target parts 20 are supported in post (Column) via maintaining part 21 22 (rigid elements).Being provided with at post 22 makes target parts 20 rotate also around the central axis of post 22 And the not shown driving means moved along central axial direction.Post 22 is extended by along vertical The rigid element of column formed, and be arranged at the outside of base station 50.Fibre core burner 30 to The front end (lower section) of target parts 20 piles up glass granules vertically, generates core preform (Core shoot)S1.The spray nozzle front end of fibre core burner 30 is configured to from being arranged at reaction vessel 10 Peristome prominent in reaction vessel 10, and be disposed towards oblique upper.
Glass granules piled up by covering burner 40 in the periphery of core preform S1, generates covering pre- System rod (Clad shoot) S2.Covering burner 40 is configured in the vertical of fibre core burner 30 Above direction, the spray nozzle front end of covering burner 40 is configured to from being arranged at reaction vessel 10 Peristome prominent in reaction vessel 10.Additionally, porous mother metal S by core preform S1 with Covering prefabricated rods S2 is constituted.Reaction vessel 10 is contained in the inside of this base station 50 by base station 50. It addition, base station 50 supplies the i.e. clean air of air of cleaning to flow being internally formed of this base station 50 Space.
In the first embodiment, near interior monitoring window 80 and with aerofluxus is set The side that the side of mouthful 11 (exhaust apparatus 70) is opposed, is provided with for supplying in reaction vessel To the air supply opening 90 of gas.And, by supplying via air supply opening 90 and by exhaust apparatus 70 The flowing of expellant gas, hinders the interior monitoring window of the glass granules inner side to reaction vessel The near surface attachment of 80.As the gas of flowing middle in reaction vessel 10, use cleaning sky Gas, thus the dust and dirt in reaction vessel 10 can also be reduced.
Fig. 2 A is the interior monitoring window 80 in the optical fiber manufacturing plant material representing present embodiment And the vertical sectional view of the brief configuration of air supply opening 90.Fig. 2 B is the light representing present embodiment Interior monitoring window 80 and the master of the brief configuration of air supply opening 90 in fine base metal manufacturing device regard Figure.
In the present embodiment, as shown in Figure 2A and 2B, air supply opening 90 is observed from front In the bottom of rectangular-shaped interior monitoring window 80 in the horizontal direction (along interior monitoring window 80 Following direction) extension, observe from front and be formed as rectangular-shaped peristome.And, pass through To applying malleation outside reaction vessel, to applying negative pressure in reaction vessel (in making reaction vessel 10 Pressure outside pressure ratio reaction vessel is low), produce from the outside of reaction vessel towards internal gas The flowing of body.Herein, air supply opening 90, interior monitoring window 80 and exhaust apparatus 70 are configured to Make to pass through the inner side of the reaction vessel 10 of interior monitoring window 80 from the gas of air supply opening 90 supply Near surface (near surface of window 80 of the interior monitoring in reaction vessel 10, reaction vessel Interior monitoring in 10 inner surface of window 80).Therefore, swim in reaction vessel 10 Glass granules be difficult to arrive interior monitoring window 80 inner surface, thus hinder glass granules to The interior monitoring surface attachment of the inner side of the reaction vessel 10 of window 80.(with reference to the arrow in Fig. 2 A Head)
Additionally, the position of the peristome of air supply opening 90 is not limited to interior monitoring window 80 times Portion, if extraneous air from the peristome of air supply opening 90 to the flowing in reaction vessel 10 by interior Portion monitors with the inner side of window 80, just can be arranged at adjacently the top of interior monitoring window 80, Laterally.
It addition, the shape of the peristome of air supply opening 90 is not particularly limited, but preferably so that internal The area maximum of the part passed through for the extraneous air passed through at peristome of the inner side of supervision window The mode changed, is arranged to rectangle along interior monitoring window.
Optical fiber manufacturing plant material 1 in present embodiment is the use of the manufacture device of VAD method, But it is not limited thereto, it is also possible to be the use of the optical fiber manufacturing plant material of external method.
< the second embodiment >
Fig. 3 A is the inside in the optical fiber manufacturing plant material representing second embodiment of the present invention Monitor with window 81 and the vertical sectional view of the brief configuration of air supply opening 91.Fig. 3 B is to represent this Interior monitoring in the optical fiber manufacturing plant material of the second embodiment of invention is with window 81 and supplies The front view of the brief configuration of QI KOU 91.
In the present embodiment, the part in addition to interior monitoring is with window 81 and air supply opening 91 Identical with the first embodiment, therefore omit the description.
In the present embodiment, air supply opening 91 is by the interior monitoring being arranged at reaction vessel side Arrange with window and constitute with the gap between peristome 93 and interior monitoring window 81.
If being described in detail, the most in the present embodiment, in the way of covering peristome 93 Interior monitoring window 81 is set.The interior monitoring top of window 81 and reaction vessel 10 such as Fig. 3 A And by chain connection shown in Fig. 3 B, interior monitoring is by the part in addition to top of window 81 not Fixed.Therefore, interior monitoring window 81 can be relative to the side of reaction vessel 10 with hinge Centered by rotate.In the present embodiment, at the lower end of peristome 93 and interior monitoring window 81 Bottom between be folded with fixture 94.Thus, interior monitoring window 81 is maintained relative to instead Answer the state that the side of container 10 tilts, at the side of reaction vessel 10 and interior monitoring window 81 Between, form the gap (air supply opening 91) of the size corresponding with the thickness of fixture 94.It addition, it is logical Cross the size (thickness) adjusting fixture 94, it is possible to freely adjust the size of air supply opening 91.Logical Cross the flowing of the gas supplied via the air supply opening 91 as gap, hinder glass granules inside Portion monitors the near surface attachment of the inner side with the reaction vessel of window 81.
Additionally, in the above-mentioned first and second embodiment, be provided with air vent (row Device of air) opposed side, side be provided with interior monitoring window and air supply opening.But, this As long as invention is the inner side that the gas from air supply opening supply passes through the reaction vessel of interior monitoring window Near surface and be just not limited by the structure of aerofluxus.
For example, it is also possible to interior monitoring window to be arranged at the side almost parallel with the flowing of air-flow (side of the paper nearby side of the reaction vessel 10 of Fig. 1, inboard side).In this case, From the outside gas inner surface by besel, thus it is also preferred that.
Alternatively, it is also possible to along interior monitoring window the side separated with exhaust apparatus one side or Person both sides arrange air supply opening.In the case of along both sides, air supply opening is set, such as, exhaust apparatus quilt In the case of the top of the one side being arranged at reaction vessel, enumerate and air supply opening has been arranged at and sets Put the structure of the lower surface of opposed side, the side of exhaust apparatus, reaction vessel.Now, internal Supervision window is arranged at the side being not provided with exhaust apparatus and air supply opening, thus gas passes through The near surface of the inner side of the reaction vessel of interior monitoring window by aerofluxus.
< embodiment >
In the first embodiment and the second embodiment in each device of explanation, manufacturing After prefabricated rods mother metal, carry out being dehydrated, clear glassization processes, thus obtain external diameter φ 100mm, The fibre parent material of effective length 1000mm.First embodiment of the application of the invention and The optical fiber manufacturing plant material of two embodiments, thus in the manufacture process of fibre parent material, internal Supervision window will not thicken.Further, since the fuzzy of interior monitoring window can be there is no concern that And improve the concentration of the glass granules in reaction vessel, it is possible to accelerate the accumulation speed of glass granules Degree.Therefore, compared with existing optical fiber manufacturing plant material, the application of the invention, it is possible to Shorten the manufacturing time of prefabricated rods mother metal.
Above, optical fiber manufacturing plant material and fibre parent material manufacture method are illustrated, but The present invention is not limited to this, can suitably become within a range not departing from the gist of the invention More.
Industrial applicability
The present invention can be widely applied for optical fiber manufacturing plant material and fibre parent material manufacture method.

Claims (6)

1. an optical fiber manufacturing plant material, it is characterised in that possess:
Reaction vessel;
Target parts, it is configured in described reaction vessel;And
Burner, its in described reaction vessel to described target parts pile up glass granules,
The interior monitoring of the sidewall being arranged at described reaction vessel is set in described reaction vessel With window, in described reaction vessel supply gas air supply opening and by described reaction vessel The exhaust apparatus that gas is discharged,
Flowing from described air supply opening by described in the inner side of described reaction vessel with described gas The near surface of interior monitoring window, and the side being discharged afterwards in being imported into described reaction vessel Formula, constitutes described air supply opening, described interior monitoring window and described exhaust apparatus.
Optical fiber manufacturing plant material the most according to claim 1, it is characterised in that
Described air supply opening is arranged near described interior monitoring window.
Optical fiber manufacturing plant material the most according to claim 1, it is characterised in that
Described air supply opening is by being arranged at the peristome of described reaction vessel and to cover described opening The gap that the mode in portion is arranged between the described interior monitoring window of described reaction vessel is constituted.
Optical fiber manufacturing plant material the most according to claim 2, it is characterised in that
Described air supply opening is by being arranged at the peristome of described reaction vessel and to cover described opening Gap between the described interior monitoring window that the mode in portion is arranged is constituted.
Optical fiber manufacturing plant material the most according to claim 1, it is characterised in that
Described interior monitoring window is arranged at and from described air supply opening to the gas of described exhaust apparatus The almost parallel side of flowing of stream.
6. the manufacture method of a fibre parent material, it is characterised in that
Use the optical fiber manufacturing plant material according to any one of claim 1~5,
Make described gas by described air supply opening described interior by the inner side of described reaction vessel The described near surface of portion's supervision window, thus manufactures fibre parent material.
CN201610182385.7A 2015-03-30 2016-03-28 Manufacturing apparatus and manufacturing method of optical fiber master batch Pending CN106007357A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-067839 2015-03-30
JP2015067839A JP2016188149A (en) 2015-03-30 2015-03-30 Manufacturing apparatus for optical fiber preform and manufacturing method for optical fiber preform

Publications (1)

Publication Number Publication Date
CN106007357A true CN106007357A (en) 2016-10-12

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CN201610182385.7A Pending CN106007357A (en) 2015-03-30 2016-03-28 Manufacturing apparatus and manufacturing method of optical fiber master batch

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CN (1) CN106007357A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5722134A (en) * 1980-07-09 1982-02-05 Hitachi Ltd Production of parent material for optical fiber
JPH02212326A (en) * 1989-02-13 1990-08-23 Fujikura Ltd Device for producing optical fiber preform
JP2002284533A (en) * 2001-03-23 2002-10-03 Sumitomo Electric Ind Ltd Manufacturing method and manufacturing apparatus for glass base material
CN1938234A (en) * 2004-03-29 2007-03-28 信越化学工业株式会社 Equipment for manufacturing porous glass base material

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6041538A (en) * 1983-08-16 1985-03-05 Sumitomo Electric Ind Ltd Apparatus for preventing clouding of window
JPH06271327A (en) * 1993-03-18 1994-09-27 Furukawa Electric Co Ltd:The Method for manufacturing porous glass preform for optical fiber
JP2981371B2 (en) * 1993-07-19 1999-11-22 シャープ株式会社 Optical coupling device
JP3386354B2 (en) * 1997-12-03 2003-03-17 信越化学工業株式会社 Method and apparatus for manufacturing glass preform for optical fiber

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5722134A (en) * 1980-07-09 1982-02-05 Hitachi Ltd Production of parent material for optical fiber
JPH02212326A (en) * 1989-02-13 1990-08-23 Fujikura Ltd Device for producing optical fiber preform
JP2002284533A (en) * 2001-03-23 2002-10-03 Sumitomo Electric Ind Ltd Manufacturing method and manufacturing apparatus for glass base material
CN1938234A (en) * 2004-03-29 2007-03-28 信越化学工业株式会社 Equipment for manufacturing porous glass base material

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Application publication date: 20161012