JP2001512414A - プラズマ外側蒸着を使用する光ファイバ製造用管状部材の製造方法 - Google Patents
プラズマ外側蒸着を使用する光ファイバ製造用管状部材の製造方法Info
- Publication number
- JP2001512414A JP2001512414A JP53407599A JP53407599A JP2001512414A JP 2001512414 A JP2001512414 A JP 2001512414A JP 53407599 A JP53407599 A JP 53407599A JP 53407599 A JP53407599 A JP 53407599A JP 2001512414 A JP2001512414 A JP 2001512414A
- Authority
- JP
- Japan
- Prior art keywords
- plasma
- target
- gas
- optical fiber
- plasmatron
- 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
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 19
- 230000008021 deposition Effects 0.000 title description 15
- 238000004519 manufacturing process Methods 0.000 title description 14
- 238000004157 plasmatron Methods 0.000 claims abstract description 20
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 21
- 238000000151 deposition Methods 0.000 claims description 18
- 239000007858 starting material Substances 0.000 claims description 14
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 12
- 239000004071 soot Substances 0.000 claims description 6
- 229910003910 SiCl4 Inorganic materials 0.000 claims description 5
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 41
- 239000007789 gas Substances 0.000 description 38
- 239000011521 glass Substances 0.000 description 14
- 239000000377 silicon dioxide Substances 0.000 description 13
- 235000012239 silicon dioxide Nutrition 0.000 description 11
- 239000000126 substance Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 239000010453 quartz Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 239000003381 stabilizer Substances 0.000 description 6
- 239000002826 coolant Substances 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000012159 carrier gas Substances 0.000 description 4
- 239000002019 doping agent Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- -1 hydroxyl ions Chemical class 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- FYSNRJHAOHDILO-UHFFFAOYSA-N thionyl chloride Chemical compound ClS(Cl)=O FYSNRJHAOHDILO-UHFFFAOYSA-N 0.000 description 2
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 244000147568 Laurus nobilis Species 0.000 description 1
- 235000017858 Laurus nobilis Nutrition 0.000 description 1
- 244000000231 Sesamum indicum Species 0.000 description 1
- 235000003434 Sesamum indicum Nutrition 0.000 description 1
- 229910003902 SiCl 4 Inorganic materials 0.000 description 1
- 229910004014 SiF4 Inorganic materials 0.000 description 1
- 229910004074 SiF6 Inorganic materials 0.000 description 1
- 235000005212 Terminalia tomentosa Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 235000020030 perry Nutrition 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000005049 silicon tetrachloride Substances 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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]
- C03B37/01413—Reactant delivery systems
- C03B37/0142—Reactant deposition burners
- C03B37/01426—Plasma deposition burners or torches
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/02—Pure silica glass, e.g. pure fused quartz
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/08—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant
- C03B2201/12—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with fluorine
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Chemical Vapour Deposition (AREA)
- Plasma Technology (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.光ファイバ形成に使用するのに適する管状部材をターゲット上に形成させる 方法において、 コイルと、上記ターゲットを上記コイルから30−50mm離間させる間隔とを 含み、上記ターゲットの長さに沿って選択的に位置決めすることができる高周 波プラズマトロンを準備するステップと、 2ppmより低い水酸基含量を有するプラズマガスを上記プラズマトロン内 に導入してプラズマを形成させるステップと、 少なくともSiCl4からなり、0.5ppmより低い水酸基含量を有するソ ースガスを上記プラズマと通じている領域内に注入するステップと、 上記ターゲットと上記コイルとの間の上記間隔を維持しながら、上記プラズ マ及び上記ソースガスの少なくとも1つの反応生成物を上記ターゲット上に沈 積させるステップと、 を含んでいることを特徴とする方法。 2.上記コイルは複数の巻線からなり、上記ターゲットは上記ターゲットに最も 近い巻線から上記間隔だけ離間されている請求項1に記載の方法。 3.上記ソースガスを上記プラズマ室内に注入する前に、フッ素含有材料を上記 ソースガス内に導入する付加的なステップを含んでいる請求項1に記載の方法 。 4.上記プラズマガスを上記プラズマトロン内に導入する前に、上記プラズマガ スを乾燥させる付加的なステップを含んでいる請求項1に記載の方法。 5.上記ソースガスは、プラズマトロン内の上記プラズマの垂直速度が0である 点の直上に導入される請求項1に記載の方法。 6.上記管状部材は、光ファイバプリフォームである請求項1に記載の方法。 7.上記管状部材は、光ファイバプリフォームのためのスターター管である請求 項1に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/994,970 US6253580B1 (en) | 1997-12-19 | 1997-12-19 | Method of making a tubular member for optical fiber production using plasma outside vapor deposition |
US08/994,970 | 1997-12-19 | ||
PCT/US1998/027051 WO1999032412A1 (en) | 1997-12-19 | 1998-12-17 | Method of making a tubular member for optical fiber production using plasma outside vapor deposition |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2001512414A true JP2001512414A (ja) | 2001-08-21 |
Family
ID=25541266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53407599A Pending JP2001512414A (ja) | 1997-12-19 | 1998-12-17 | プラズマ外側蒸着を使用する光ファイバ製造用管状部材の製造方法 |
Country Status (14)
Country | Link |
---|---|
US (1) | US6253580B1 (ja) |
JP (1) | JP2001512414A (ja) |
CN (1) | CN1129558C (ja) |
AU (2) | AU1832899A (ja) |
BR (1) | BR9807783A (ja) |
CA (1) | CA2281541C (ja) |
DE (1) | DE29823926U1 (ja) |
GB (1) | GB9921758D0 (ja) |
HK (1) | HK1037598A1 (ja) |
MY (1) | MY124270A (ja) |
RU (1) | RU2217391C2 (ja) |
TW (1) | TW575529B (ja) |
WO (2) | WO1999032412A1 (ja) |
ZA (1) | ZA9811653B (ja) |
Cited By (1)
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---|---|---|---|---|
US7142771B2 (en) | 2002-03-12 | 2006-11-28 | Sumitomo Electric Industries, Ltd. | Method of and apparatus for expanding mode field diameter of optical fiber |
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IT1308786B1 (it) * | 1999-07-05 | 2002-01-10 | Cselt Centro Studi Lab Telecom | Procedimento e apparecchiatura per la formazione di strati piani disilice vetrosa mediante l'uso di una torcia a plasma ad accoppiamento |
US6793775B2 (en) * | 2001-03-13 | 2004-09-21 | Mikhail I. Gouskov | Multiple torch—multiple target method and apparatus for plasma outside chemical vapor deposition |
WO2002098806A1 (en) * | 2001-05-31 | 2002-12-12 | Corning Incorporated | Method of manufacturing an optical fiber from a perform and optical fiber made by the method |
US20030027055A1 (en) * | 2001-08-01 | 2003-02-06 | Ball Laura J. | Method and feedstock for making photomask material |
US20030027054A1 (en) * | 2001-08-01 | 2003-02-06 | Ball Laura J. | Method for making photomask material by plasma induction |
US6769275B2 (en) | 2002-03-15 | 2004-08-03 | Fibercore, Inc. | Method for making optical fiber preform using simultaneous inside and outside deposition |
DE10218864C1 (de) * | 2002-04-26 | 2003-10-23 | Heraeus Tenevo Ag | Verfahren zur Herstellung eines zylinderförmigen Quarzglaskörpers mit geringem OH-Gehalt |
KR100507622B1 (ko) * | 2002-10-17 | 2005-08-10 | 엘에스전선 주식회사 | 외부기상증착법을 이용한 광섬유 프리폼의 제조방법 및 장치 |
DE10316487B4 (de) * | 2003-04-09 | 2005-03-31 | Heraeus Tenevo Ag | Verfahren zur Herstellung einer Vorform für optische Fasern |
CN1791559B (zh) * | 2003-05-19 | 2010-05-12 | 住友电气工业株式会社 | 光纤及光纤制造方法 |
US7793612B2 (en) | 2003-08-01 | 2010-09-14 | Silica Tech, Llc | Ring plasma jet method and apparatus for making an optical fiber preform |
NL1024480C2 (nl) | 2003-10-08 | 2005-04-11 | Draka Fibre Technology Bv | Werkwijze ter vervaardiging van een voorvorm voor optische vezels, alsmede werkwijze ter vervaardiging van optische vezels. |
KR100606053B1 (ko) * | 2004-11-24 | 2006-07-31 | 삼성전자주식회사 | 광섬유 모재 제조 장치 |
CN1314608C (zh) * | 2005-06-10 | 2007-05-09 | 中国建筑材料科学研究院 | 高频等离子气相合成石英玻璃的方法 |
US8029536B2 (en) * | 2005-11-14 | 2011-10-04 | Tornier, Inc. | Multiple offset eyelet suture anchor |
JP2009522199A (ja) * | 2005-12-29 | 2009-06-11 | シリカ テック リミテッド ライアビリティ カンパニー | 合成シリカを作製するための、改善されたプラズマトーチ |
EP2383368A2 (en) | 2006-04-14 | 2011-11-02 | Silica Tech, LLC | Plasma deposition apparatus and method for making solar cells |
US20100189926A1 (en) * | 2006-04-14 | 2010-07-29 | Deluca Charles | Plasma deposition apparatus and method for making high purity silicon |
US20080210290A1 (en) * | 2006-04-14 | 2008-09-04 | Dau Wu | Plasma inside vapor deposition apparatus and method for making multi-junction silicon thin film solar cell modules and panels |
EP2054538A2 (en) * | 2006-07-07 | 2009-05-06 | Silica Tech, LLC | Plasma deposition apparatus and method for making polycrystalline silicon |
DE102006031898B4 (de) * | 2006-07-07 | 2009-09-10 | Heraeus Quarzglas Gmbh & Co. Kg | Verfahren zur Herstellung eines rohrförmigen Halbzeugs aus fluordotiertem Quarzglas |
DE102006059779B4 (de) * | 2006-12-15 | 2010-06-24 | Heraeus Quarzglas Gmbh & Co. Kg | Verfahren für die Herstellung eines Hohlzylinders aus synthetischem Quarzglas, nach dem Verfahren erhaltener dickwandiger Hohlzylinder und Verfahren zur Herstellung einer Vorform für optische Fasern |
DE102007003889B3 (de) * | 2007-01-19 | 2008-09-11 | Heraeus Quarzglas Gmbh & Co. Kg | Quarzglasrohr als Halbzeug für die Vorform- und Faserherstellung, dessen Verwendung sowie Verfahren zur Herstellung des Quarzglasrohres |
JP5148367B2 (ja) * | 2007-05-29 | 2013-02-20 | 信越化学工業株式会社 | 高周波誘導熱プラズマトーチを用いた光ファイバプリフォームの製造方法 |
JP5023016B2 (ja) * | 2007-08-10 | 2012-09-12 | 信越化学工業株式会社 | 光ファイバ製造装置および線引き炉のシール方法 |
US8252387B2 (en) * | 2007-12-10 | 2012-08-28 | Ofs Fitel, Llc | Method of fabricating optical fiber using an isothermal, low pressure plasma deposition technique |
US8815103B2 (en) * | 2008-04-30 | 2014-08-26 | Corning Incorporated | Process for preparing an optical preform |
DE102008049325B4 (de) * | 2008-09-29 | 2011-08-25 | Heraeus Quarzglas GmbH & Co. KG, 63450 | Verfahren zur Herstellung eines rohrförmigen Halbzeugs aus Quarzglas sowie Halbzeug aus Quarzglas |
DE102009004757B4 (de) | 2008-11-12 | 2011-12-08 | J-Fiber Gmbh | Substratrohr für sowie Verfahren zur plasmagestützten Herstellung von dotierten oder undotierten Rohren als Vorformen für die Fertigung optischer Fasern und Verwendung. |
DE102009010497A1 (de) | 2008-12-19 | 2010-08-05 | J-Fiber Gmbh | Mehrdüsiger rohrförmiger Plasma-Abscheidebrenner zur Herstellung von Vorformen als Halbzeuge für optische Fasern |
DE102009010498A1 (de) | 2008-12-19 | 2010-07-22 | J-Fiber Gmbh | Mehrdüsiger rohrförmiger Plasma-Abscheidebrenner zur Herstellung von Vorformen als Halbzeuge für optische Fasern |
JP4926165B2 (ja) * | 2008-12-26 | 2012-05-09 | 信越化学工業株式会社 | 高周波誘導熱プラズマトーチを用いた光ファイバプリフォームの製造方法及び装置 |
NL1041529B1 (en) * | 2015-10-16 | 2017-05-02 | Draka Comteq Bv | A method for etching a primary preform and the etched primary preform thus obtained. |
CN111847863B (zh) * | 2019-04-28 | 2024-06-07 | 中天科技精密材料有限公司 | 等离子沉积设备及其应用方法 |
CN111960658B (zh) * | 2020-09-20 | 2023-08-22 | 连云港三明石英制品有限公司 | 一种具有芯管定位夹具的专用ovd烧结石英炉 |
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-
1997
- 1997-12-19 US US08/994,970 patent/US6253580B1/en not_active Expired - Lifetime
-
1998
- 1998-12-17 RU RU99119902/03A patent/RU2217391C2/ru not_active IP Right Cessation
- 1998-12-17 BR BR9807783-0A patent/BR9807783A/pt not_active IP Right Cessation
- 1998-12-17 WO PCT/US1998/027051 patent/WO1999032412A1/en active Application Filing
- 1998-12-17 AU AU18328/99A patent/AU1832899A/en not_active Abandoned
- 1998-12-17 GB GBGB9921758.0A patent/GB9921758D0/en not_active Withdrawn
- 1998-12-17 DE DE29823926U patent/DE29823926U1/de not_active Expired - Lifetime
- 1998-12-17 CN CN98804318.1A patent/CN1129558C/zh not_active Expired - Fee Related
- 1998-12-17 CA CA002281541A patent/CA2281541C/en not_active Expired - Fee Related
- 1998-12-17 JP JP53407599A patent/JP2001512414A/ja active Pending
- 1998-12-18 ZA ZA9811653A patent/ZA9811653B/xx unknown
- 1998-12-19 MY MYPI98005755A patent/MY124270A/en unknown
-
1999
- 1999-03-20 TW TW87121302A patent/TW575529B/zh not_active IP Right Cessation
-
2000
- 2000-08-31 AU AU70930/00A patent/AU7093000A/en not_active Abandoned
- 2000-08-31 WO PCT/US2000/023866 patent/WO2001016039A1/en active Search and Examination
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2001
- 2001-06-07 HK HK01103939A patent/HK1037598A1/xx not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7142771B2 (en) | 2002-03-12 | 2006-11-28 | Sumitomo Electric Industries, Ltd. | Method of and apparatus for expanding mode field diameter of optical fiber |
Also Published As
Publication number | Publication date |
---|---|
WO1999032412A1 (en) | 1999-07-01 |
TW575529B (en) | 2004-02-11 |
GB9921758D0 (en) | 1999-11-17 |
AU7093000A (en) | 2001-03-26 |
CN1129558C (zh) | 2003-12-03 |
WO2001016039A1 (en) | 2001-03-08 |
CN1252778A (zh) | 2000-05-10 |
AU1832899A (en) | 1999-07-12 |
RU2217391C2 (ru) | 2003-11-27 |
US6253580B1 (en) | 2001-07-03 |
HK1037598A1 (en) | 2002-02-15 |
CA2281541C (en) | 2004-11-23 |
CA2281541A1 (en) | 1999-07-01 |
DE29823926U1 (de) | 2000-01-13 |
ZA9811653B (en) | 1999-06-18 |
GB2337047A (en) | 1999-11-10 |
MY124270A (en) | 2006-06-30 |
BR9807783A (pt) | 2002-05-07 |
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