JP5300721B2 - 微細構造伝送光ファイバ - Google Patents
微細構造伝送光ファイバ Download PDFInfo
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- JP5300721B2 JP5300721B2 JP2009518214A JP2009518214A JP5300721B2 JP 5300721 B2 JP5300721 B2 JP 5300721B2 JP 2009518214 A JP2009518214 A JP 2009518214A JP 2009518214 A JP2009518214 A JP 2009518214A JP 5300721 B2 JP5300721 B2 JP 5300721B2
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
-
- 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]
- C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
-
- 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]
- C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
- C03B37/01453—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering for doping the preform with flourine
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03638—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only
- G02B6/0365—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only arranged - - +
-
- 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
- C03B2203/14—Non-solid, i.e. hollow products, e.g. hollow clad or with core-clad interface
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/42—Photonic crystal fibres, e.g. fibres using the photonic bandgap PBG effect, microstructured or holey optical fibres
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02319—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by core or core-cladding interface features
- G02B6/02333—Core having higher refractive index than cladding, e.g. solid core, effective index guiding
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
- G02B6/02357—Property of longitudinal structures or background material varies radially and/or azimuthally in the cladding, e.g. size, spacing, periodicity, shape, refractive index, graded index, quasiperiodic, quasicrystals
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Glass Compositions (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Optical Communication System (AREA)
Description
空所箇所は1000℃に設定されたアルゴンでパージされた支持オーブン内に24時間載置された。そして、このプリフォームは、3600グラムの追加SiO2(0.42g/cc密度)スートがOVDを介して堆積された旋盤に戻された。そして、このアセンブリの(オーバークラッドと称される)クラッドのスートは以下の通り焼結された。
アセンブリは、最初に、2時間1000℃でヘリウムと3パーセントのクロリンから成る雰因気中において乾燥された。それに続き、アセンブリは、6mm/分で100%のヘリウム雰囲気中で1500℃に設定された高温域を介して、引き下げられた。この目的は、酸化ゲルマニウム含有無空洞コア、シリカ無空洞内部クラッドシリカ酸素シードリング、及び無空洞オーバークラッド空所箇所に対して、スートを焼結させるためである。空所箇所は24時間、1000℃に設定され且つアルゴンでパージされた支持オーブンに載置され、ヘリウムが空所箇所から出ガスされた。光ファイバプレホームは、2000℃に設定された8の長さの高温域を有する加熱炉内で、20メートル/秒で約125ミクロン径ファイバに線引きされた。ファイバの端面のSEM分析は約4ミクロンの半径を有するGeO2−SiO2コアを示した。そのGeO2−SiO2コアは、12ミクロンの外側半径を有する無空洞近接クラッド領域によって囲まれ、その無空洞近接クラッド領域は18ミクロンの外側の半径の空洞含有クラッド領域(約4ミクロンのリングの厚さ)によって囲まれ、その18ミクロンの外側の半径空洞含有クラッド領域は、無空胴の純シリカの外側クラッドによって囲まれている。無空胴の純シリカの外側クラッドは、125ミクロン(光ファイバの中心から測定されたすべての半径方向サイズ)の外径を有する。空洞含有リング領域は2.7パーセントの局部的面積パーセントの空孔(容積で100パーセントのO2)を含んだ。その領域では空孔の平均直径は0.36ミクロンであり、空孔の最小直径は0.05ミクロンであり、空孔の最大直径は0.8ミクロンであり、その結果、ファイバ断面において総数が約105の空孔が得られた。総ファイバ空洞面積パーセント(光ファイバの総横断面積によって割られた空胴の総横断面積×100)は約0.11パーセントであった。このファイバの光物性は1310と1550nmにおいてそれぞれ0.33と0.19dB/kmであり、ファイバーカットオフは約1250nmであった。その結果、1250nmを超えた波長においてファイバをシングルモード化することができた。このファイバの一部分が、10mm直径のマンドレルに巻かれて曲げ性能のために測定され、ファイバは1550nmにおいて約0.2dB/turnの減衰値の増加を示した。従って、この結果は、5dB/turn未満の減衰値の増大、望ましくは10mm直径のマンドレル巻かれた場合0.5dB/turn未満の減衰値の増大が達成されたことを示している。ファイバのこの同じ部分が20mm直径のマンドレルに巻かれて曲げ性能のために測定され、ファイバは1550nmにおいて約0.02dB/turnの減衰値の増加を示した。従って、この結果は、20mm直径のマンドレルに巻かれた場合、1dB/turn未満の減衰値の増大、望ましくは0.1dB/turn未満の減衰値の増大、さらに望ましくは0.05dB/turn未満の減衰値の増大が達成されたことを示している。ファイバのこの同じ部分が8mm直径のマンドレルに巻かれて曲げ性能のために測定され、ファイバは1550nmにおいて約2dB/turnの減衰値の増加を示した。従って、この結果は、8mm直径のマンドレルに巻かれた場合、10dB/turn未満の減衰値の増大、より望ましくは5dB/turn未満の減衰値の増大、さらに望ましくは3dB/turn未満の減衰値の増大が達成されたことを示している。
Claims (6)
- 光に含まれる光学信号を伝送する微細構造光ファイバであって、前記光ファイバは、
長手方向のほぼ中心線に沿って配置されたコア領域と、
前記コア領域を囲み且つ非周期的に配置された空孔を含む環状空孔含有領域を有するクラッド領域と、を含み、
前記環状空孔含有領域は12ミクロン未満の最大半径幅を有し、
前記環状空孔含有領域の局部的空洞面積パーセントは30パーセント未満であり、
前記非周期的に配置された空孔の平均直径は1550nm未満であることを特徴とする光ファイバ。 - 前記環状空孔含有領域は0.5ミクロンより大であり且つ12ミクロン未満の最大半径幅を有することを特徴とする請求項1に記載の光ファイバ。
- 前記環状空孔含有領域は0.05パーセントより大であり且つ30パーセント未満の局部的空洞面積パーセントを有することを特徴とする請求項1に記載の光ファイバ。
- 前記非周期的に配置された空孔の平均直径は、1nmより大であり且つ1550nm未満であることを特徴とする請求項1に記載の光ファイバ。
- 前記非周期的に配置された空孔の最大直径は2000nm未満であることを特徴とする請求項1に記載の光ファイバ。
- 前記クラッド領域は、前記コア領域と前記環状空孔含有領域の間に配置され且つ前記コア領域を囲む内側環状無空孔領域を有することを特徴とする請求項1〜5のいずれか1つに記載の光ファイバ。
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US81772106P | 2006-06-30 | 2006-06-30 | |
US60/817,721 | 2006-06-30 | ||
US92042507P | 2007-03-28 | 2007-03-28 | |
US60/920,425 | 2007-03-28 | ||
US11/800,161 US7505660B2 (en) | 2006-06-30 | 2007-05-04 | Microstructured transmission optical fiber |
US11/800,161 | 2007-05-04 | ||
PCT/US2007/014787 WO2008005233A2 (en) | 2006-06-30 | 2007-06-26 | Microstructured transmission optical fiber |
Publications (2)
Publication Number | Publication Date |
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JP2009543126A JP2009543126A (ja) | 2009-12-03 |
JP5300721B2 true JP5300721B2 (ja) | 2013-09-25 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2009518214A Expired - Fee Related JP5300721B2 (ja) | 2006-06-30 | 2007-06-26 | 微細構造伝送光ファイバ |
Country Status (5)
Country | Link |
---|---|
US (1) | US7505660B2 (ja) |
EP (1) | EP2038687B1 (ja) |
JP (1) | JP5300721B2 (ja) |
KR (1) | KR20090027744A (ja) |
WO (1) | WO2008005233A2 (ja) |
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WO2004092794A1 (ja) * | 2003-04-11 | 2004-10-28 | Fujikura Ltd. | 光ファイバ |
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WO2008013627A2 (en) * | 2006-06-30 | 2008-01-31 | Corning Incorporated | Low bend loss optical fiber with high modulus coating |
-
2007
- 2007-05-04 US US11/800,161 patent/US7505660B2/en not_active Expired - Fee Related
- 2007-06-26 KR KR1020097001740A patent/KR20090027744A/ko active IP Right Grant
- 2007-06-26 EP EP07796448.4A patent/EP2038687B1/en not_active Expired - Fee Related
- 2007-06-26 JP JP2009518214A patent/JP5300721B2/ja not_active Expired - Fee Related
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WO2008005233A2 (en) | 2008-01-10 |
JP2009543126A (ja) | 2009-12-03 |
EP2038687B1 (en) | 2014-01-08 |
US7505660B2 (en) | 2009-03-17 |
US20080131066A1 (en) | 2008-06-05 |
WO2008005233A3 (en) | 2008-10-16 |
KR20090027744A (ko) | 2009-03-17 |
EP2038687A2 (en) | 2009-03-25 |
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