JP2015508386A - 光学部品のための半完成品としての石英ガラス管並びに前記石英ガラス管を製造するための方法 - Google Patents
光学部品のための半完成品としての石英ガラス管並びに前記石英ガラス管を製造するための方法 Download PDFInfo
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 230000003287 optical effect Effects 0.000 title claims abstract description 20
- 239000011265 semifinished product Substances 0.000 title claims abstract description 6
- 238000005253 cladding Methods 0.000 claims description 67
- 238000000034 method Methods 0.000 claims description 39
- 239000000463 material Substances 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 14
- 229910052731 fluorine Inorganic materials 0.000 claims description 6
- 239000011737 fluorine Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 4
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 1
- 239000011162 core material Substances 0.000 description 64
- 239000011521 glass Substances 0.000 description 19
- 238000005086 pumping Methods 0.000 description 8
- 239000000835 fiber Substances 0.000 description 7
- 238000000227 grinding Methods 0.000 description 7
- 239000013307 optical fiber Substances 0.000 description 7
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 5
- 238000000151 deposition Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- 239000011149 active material Substances 0.000 description 2
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- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium oxide Inorganic materials O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical compound [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 description 2
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- 229910052684 Cerium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
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- 238000007796 conventional method Methods 0.000 description 1
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- 239000002019 doping agent Substances 0.000 description 1
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- 239000007789 gas Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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- 230000006698 induction Effects 0.000 description 1
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- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
- C03B37/01222—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube for making preforms of multiple core optical fibres
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/01228—Removal of preform material
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
-
- 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
- C03B37/0128—Manufacture of preforms for drawing fibres or filaments starting from pulverulent glass
- C03B37/01291—Manufacture of preforms for drawing fibres or filaments starting from pulverulent glass by progressive melting, e.g. melting glass powder during delivery to and adhering the so-formed melt to a target or preform, e.g. the Plasma Oxidation Deposition [POD] process
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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
- C03B37/01426—Plasma deposition burners or torches
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- 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
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- 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
- C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
- C03B2201/31—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with germanium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/02—External structure or shape details
- C03B2203/04—Polygonal outer cross-section, e.g. triangular, square
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/12—Non-circular or non-elliptical cross-section, e.g. planar core
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/22—Radial profile of refractive index, composition or softening point
- C03B2203/23—Double or multiple optical cladding profiles
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/30—Polarisation maintaining [PM], i.e. birefringent products, e.g. with elliptical core, by use of stress rods, "PANDA" type fibres
- C03B2203/31—Polarisation maintaining [PM], i.e. birefringent products, e.g. with elliptical core, by use of stress rods, "PANDA" type fibres by use of stress-imparting rods, e.g. by insertion
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/32—Eccentric core or cladding
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/34—Plural core other than bundles, e.g. double core
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2935—Discontinuous or tubular or cellular core
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- Organic Chemistry (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
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- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
Description
コアロッドの石英ガラスは、通常は純度と光学的品質に関して特に高い要求に十分に対応することが可能である。そのためコアロッドは、プリフォームの製造において大きなコスト要因となる傾向がある。内側クラッドガラス層の研削処理の際には、公知手法ではコアロッドの全損失を引き起こすリスクも抱えている。
石英ガラス管に関する上記の課題は、冒頭に述べたようなタイプの石英ガラス管から出発して本発明により、次のようにして解決される。すなわち、接触面が半径方向断面において非円形の延在形状を示し、内側クラッド内面が円形の延在形状を示すように構成することによって解決される。
以下では本発明の実施形態を図面に基づいてより詳細に説明する。これらの詳細は各図面に略図で描写されている。
Claims (13)
- コアロッドを収容するための、管路中心軸(17)に沿って延在する内孔部と、
内側クラッド内面(1)と外側クラッド外面(2)とによって画定される管路壁部(3)とを有し、
前記管路壁部(3)内では、第1の石英ガラスからなる内側領域(4)と、該内側領域(4)を取り囲む第2の石英ガラスからなる外側領域(5)とが、前記中心軸線(17)の周りに延在する接触面(6)において互いに接しており、
前記第1の石英ガラスの屈折率と前記第2の石英ガラスの屈折率が異なっている、光学部品のための半完成品としての石英ガラス管において、
前記接触面(6)が、半径方向断面において非円形の延在形状を示し、
前記内側クラッド内面(1)は、円形の延在形状を示すように構成されていることを特徴とする、石英ガラス管。 - 前記接触面(6)は、半径方向断面において、少なくとも1つの角を有している、請求項1記載の石英ガラス管。
- 前記接触面(6)は、半径方向断面において、多角形の延在形状を示している、請求項1又は2記載の石英ガラス管。
- 前記接触面(6)は、半径方向断面において、直線状の長手区間(11)と湾曲状の長手区間(10)を交互に有するか又は左に湾曲した長手区間と右に湾曲した長手区間とを交互に有する延在形状を示している、請求項1又は2記載の石英ガラス管。
- 前記内側領域(4)と前記外側領域(5)との間の前記接触面(6)が第1の接触面であり、前記第1の接触面は、前記管路壁部(3)内で第2の接触面(26)によって取り囲まれており、前記第2の接触面(26)も異なる屈折率を有する石英ガラスからなる領域(14;15)を画定し、半径方向断面において非円形の延在形状を有している、請求項1から4いずれか1項記載の石英ガラス管。
- 前記外側クラッド外面(2)は、円形の延在形状を示している、請求項1から5いずれか1項記載の石英ガラス管。
- 前記内孔部(7)は、前記中心軸(17)に対して同軸状に延在している、請求項1から6いずれか1項記載の石英ガラス管。
- 前記外側領域(5)の石英ガラスにフッ素がドープされている、請求項1から7いずれか1項記載の石英ガラス。
- 前記内側領域(4)は、非ドープの石英ガラスからなる、請求項1から8いずれか1項記載の石英ガラス。
- 前記管路壁部(3)は、前記内孔部(7)と前記内側領域(4)との間を延在し、かつ、非ドープの石英ガラスよりも大きな屈折率を有する石英ガラスからなっている、内側層(18)を有している、請求項1から9いずれか1項記載の石英ガラス管。
- 請求項1から10いずれか1項記載の石英ガラス管を製造するための方法において、
母材管を石英ガラスから形成し、
前記母材管は管路壁部を有し、該管路壁部内では、半径方向で取り囲む断面が非円形の接触面において、第1の石英ガラスからなる内側領域と、該内側領域を取り囲む第2の石英ガラスからなる外側領域とが互いに接し、
前記第1の石英ガラスの屈折率と前記第2の石英ガラスの屈折率とが異なっており、
前記母材管は、工具なしで、石英ガラス管ストランドに線引きされ、そこから部分部材にカットされることを特徴とする方法。 - 前記線引き過程において、3から100の範囲の延伸比、好ましくは40未満の延伸比が設定される、請求項11記載の方法。
- 前記母材管の内孔部は、前記線引き過程の際に洗浄ガスによって洗浄される、請求項11又は12記載の方法。
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Application Number | Priority Date | Filing Date | Title |
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DE102012000670.5 | 2012-01-17 | ||
DE102012000670A DE102012000670A1 (de) | 2012-01-17 | 2012-01-17 | Rohrförmiges Halbzeug aus Quarzglas für ein optisches Bauteil sowie Verfahren zur Herstellung des Halbzeugs |
PCT/EP2013/050776 WO2013107787A1 (de) | 2012-01-17 | 2013-01-17 | Quarzglasrohr als halbzeug für ein optisches bauteil sowie verfahren zur herstellung des quarzglasrohres |
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JP6095690B2 JP6095690B2 (ja) | 2017-03-15 |
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EP (1) | EP2804839B1 (ja) |
JP (1) | JP6095690B2 (ja) |
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DE102012107344B3 (de) * | 2012-08-09 | 2014-05-08 | Heraeus Quarzglas Gmbh & Co. Kg | Verfahren zur Herstellung einer optischen Vorform mit einer POD-Mantelglasschicht |
CN104608020B (zh) * | 2015-02-03 | 2017-01-18 | 中国电子科技集团公司第四十六研究所 | 一种双包层光纤八角形内包层的加工方法及夹具 |
EP3636607B1 (de) * | 2018-10-09 | 2021-01-13 | Heraeus Quarzglas GmbH & Co. KG | Verfahren zur herstellung eines kapillarrohres |
CN114918741A (zh) * | 2022-03-17 | 2022-08-19 | 无锡海力自控工程有限公司 | 一种单晶硅超薄壁管加工工艺 |
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US20020136515A1 (en) * | 1998-11-16 | 2002-09-26 | Hartwig Schaper | Substrate tube and process for producing a preform for an optical fiber |
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US20030031444A1 (en) * | 2001-08-07 | 2003-02-13 | Andre Croteau | Convex polygon-shaped all-glass multi-clad optical fiber and method of fabrication thereof |
WO2005082801A2 (en) * | 2004-02-20 | 2005-09-09 | Corning Incorporated | Optical fiber and method for making such fiber |
US20060088261A1 (en) * | 2004-10-21 | 2006-04-27 | Berkey George E | Rare earth doped single polarization double clad optical fiber and a method for making such fiber |
EP2337166A1 (fr) * | 2009-12-21 | 2011-06-22 | IXFiber | Procédé de fabrication d'une fibre optique monomode à coeur dopé terres rares et fibre optique monomode à coeur dopé terres rares |
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GB2002342B (en) * | 1977-07-27 | 1982-06-30 | Sumitomo Electric Industries | Process for producing a glass member |
AU2002237219A1 (en) * | 2001-03-12 | 2002-11-11 | Crystal Fibre A/S | Higher-order-mode dispersion compensating photonic crystal fibres |
CA2466970A1 (en) | 2004-05-12 | 2005-11-12 | Coractive High-Tech Inc. | Double-clad optical fibers |
JP2007153697A (ja) | 2005-12-07 | 2007-06-21 | Fujikura Ltd | ダブルクラッド光ファイバ用母材の製造方法及びダブルクラッド光ファイバの製造方法 |
DE102008047736B3 (de) | 2008-07-07 | 2010-01-21 | Heraeus Quarzglas Gmbh & Co. Kg | Biegeunempfindliche optische Faser, Quarzglasrohr als Halbzeug für seine Herstellung sowie Verfahren zur Herstellung der Faser |
JP5676152B2 (ja) * | 2010-06-15 | 2015-02-25 | 湖北工業株式会社 | 光ファイバ及びその製造方法 |
-
2012
- 2012-01-17 DE DE102012000670A patent/DE102012000670A1/de not_active Withdrawn
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2013
- 2013-01-17 CN CN201380005754.XA patent/CN104039723B/zh active Active
- 2013-01-17 EP EP13700567.4A patent/EP2804839B1/de active Active
- 2013-01-17 JP JP2014552615A patent/JP6095690B2/ja active Active
- 2013-01-17 US US14/372,734 patent/US10183886B2/en active Active
- 2013-01-17 WO PCT/EP2013/050776 patent/WO2013107787A1/de active Application Filing
Patent Citations (8)
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US20020136515A1 (en) * | 1998-11-16 | 2002-09-26 | Hartwig Schaper | Substrate tube and process for producing a preform for an optical fiber |
WO2002059660A1 (en) * | 2000-10-23 | 2002-08-01 | Nufern | Cladding-pumped optical fiber and methods for fabricating |
JP2003020241A (ja) * | 2001-07-02 | 2003-01-24 | Furukawa Electric Co Ltd:The | モードフィールド変換用光ファイバの製造方法 |
US20030031444A1 (en) * | 2001-08-07 | 2003-02-13 | Andre Croteau | Convex polygon-shaped all-glass multi-clad optical fiber and method of fabrication thereof |
WO2005082801A2 (en) * | 2004-02-20 | 2005-09-09 | Corning Incorporated | Optical fiber and method for making such fiber |
US20060088261A1 (en) * | 2004-10-21 | 2006-04-27 | Berkey George E | Rare earth doped single polarization double clad optical fiber and a method for making such fiber |
EP2337166A1 (fr) * | 2009-12-21 | 2011-06-22 | IXFiber | Procédé de fabrication d'une fibre optique monomode à coeur dopé terres rares et fibre optique monomode à coeur dopé terres rares |
EP2337166B1 (fr) * | 2009-12-21 | 2016-11-30 | Ixblue | Procédé de fabrication d'une fibre optique monomode à coeur dopé terres rares et fibre optique monomode à coeur dopé terres rares |
Also Published As
Publication number | Publication date |
---|---|
CN104039723A (zh) | 2014-09-10 |
US10183886B2 (en) | 2019-01-22 |
WO2013107787A1 (de) | 2013-07-25 |
CN104039723B (zh) | 2017-03-15 |
US20150017440A1 (en) | 2015-01-15 |
EP2804839B1 (de) | 2016-04-20 |
EP2804839A1 (de) | 2014-11-26 |
DE102012000670A1 (de) | 2013-07-18 |
JP6095690B2 (ja) | 2017-03-15 |
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