JP5638805B2 - 低曲げ損失シングルモード光ファイバ - Google Patents
低曲げ損失シングルモード光ファイバ Download PDFInfo
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- JP5638805B2 JP5638805B2 JP2009526673A JP2009526673A JP5638805B2 JP 5638805 B2 JP5638805 B2 JP 5638805B2 JP 2009526673 A JP2009526673 A JP 2009526673A JP 2009526673 A JP2009526673 A JP 2009526673A JP 5638805 B2 JP5638805 B2 JP 5638805B2
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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
- 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 - - +
-
- 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
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
-
- 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
-
- 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
- G02B6/02004—Optical fibres with cladding with or without a coating characterised by the core effective area or mode field radius
- G02B6/02009—Large effective area or mode field radius, e.g. to reduce nonlinear effects in single mode fibres
- G02B6/02014—Effective area greater than 60 square microns in the C band, i.e. 1530-1565 nm
-
- 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
- G02B6/02214—Optical fibres with cladding with or without a coating tailored to obtain the desired dispersion, e.g. dispersion shifted, dispersion flattened
- G02B6/02219—Characterised by the wavelength dispersion properties in the silica low loss window around 1550 nm, i.e. S, C, L and U bands from 1460-1675 nm
- G02B6/02266—Positive dispersion fibres at 1550 nm
-
- 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
- G02B6/03605—Highest refractive index not on central axis
- G02B6/03611—Highest index adjacent to central axis region, e.g. annular core, coaxial ring, centreline depression affecting waveguiding
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Lasers (AREA)
- Glass Compositions (AREA)
Description
表1〜2には、第1組の実施の形態の説明に役立つ実施例である実施例1〜4が列記されている。図1は、実施例1に対応する屈折率プロファイルを示しており、これは、以下の列記された値であるが、実施例2も表している。図2および3は、それぞれ、実施例3および4に対応する屈折率プロファイルを示している。
表5〜6には、第3組の実施の形態の説明に役立つ実施例である実施例9〜13の特徴が列記されている。実施例9〜13の屈折率プロファイルは、図1と同様であるが、以下のそれぞれの値を有する。
光ファイバを外付け法により製造した。この光ファイバの測定した相対屈折率プロファイルが図4に示されている。純粋なシリカのクラッドを有する、ゲルマニアがドープされたシリカガラスコアケインが、ガラススート層の化学的気相成長のためのベイトロッドとして働き、これにフッ素をドープし、固結させ、次いで、ガラススートの外側層を施し、固結させて、光ファイバプリフォームを形成した。このプリフォームを、クラッド200により取り囲まれ接触したゲルマニアドープトコア20を有し、クラッド200が、環状内側領域30、環状リング領域50、および環状外側領域60を有し、Δ1MAX=0.43%、R1=4.6μm、R2=8.5μm、Δ3MIN=−0.70%、R3=11.7μm、W2=3.9μm、W3=3.2μm、R1/R2=0.54、V1=6.4、およびV3=−28.3(|V3|=28.3)である光ファイバに線引きした。1550nmでの測定した20mmの直径の曲げ試験結果(直径20mmのマンドレルの周りに光ファイバを巻き付ける)は:直径20mmのマンドレルの周り1巻について0.028dB/巻、およびそのマンドレルの周りに5巻について0.126dB/巻であった。1550nmでの測定した10mmの直径の曲げ試験結果(直径10mmのマンドレルの周りに光ファイバを巻き付ける)は:直径10mmのマンドレルの周り1巻について0.60dB/巻であった。測定したMFDは、1310nmおよび1550nmで、それぞれ、8.27μmおよび9.24μmであった。2mファイバカットオフは1251nmであった。
100 光ファイバ、光導波路ファイバ
200 クラッド
330,400 光ファイバ通信システム
334,434 送信器
336,436 受信器
Claims (3)
- 光ファイバにおいて、
中心線から半径R1まで延在するガラスコア、および
前記コアを取り囲み接触したガラスクラッドであって、
R1から半径R2まで延在し、半径幅W2=R2−R1を有する環状内側領域、
R2から半径R3まで延在し、半径幅W3=R3−R2を有する環状リング領域、および
R3から最も外側のガラス半径R4まで延在する環状外側領域、
を含むクラッド、
を備え、
前記コアが、前記外側領域に対する最大相対屈折率Δ1MAXを有し、0.28%<Δ1MAX<0.45%であり、
前記環状内側領域が、半径幅W2、前記外側領域に対する最小相対屈折率Δ2MIN、および前記外側領域に対する最大相対屈折率Δ2MAXを有し、Δ2MIN ≧−0.02%、Δ2MAX ≦0.02%、およびW2>2μmであり、
前記環状リング領域が、前記環状外側領域に対する最小相対屈折率Δ3MINを有し、−0.72%≦Δ3MIN ≦−0.12%であり、
Δ1MAX>Δ2MAX>Δ3MIN、およびΔ1MAX>Δ2MIN>Δ3MINであり、
0.40<R 1 /R 2 <0.6であり、
3.0μm<R 1 <5.0μmであり、
8.0μm<R 2 <12.0μmであり、
10.0μm<R 3 <20.0μmであり、
1.0μm<W 3 <8.0μmであり、
前記コアおよび前記クラッドが、1260nm未満のファイバカットオフ、1300および1324nmの間のゼロ分散、8.20および9.50μmの間の1310nmでのモードフィールド径、および波長1550nmでの1.0dB/巻未満の直径10mmのマンドレルの曲げ損失を提供し、
前記環状リング領域が、
20%・μm2<|V3|<80%・μm2であることを特徴とする光ファイバ。 - 前記コアおよび前記クラッドが、波長1550nmでの0.05dB/巻未満の直径20mmのマンドレルの曲げ損失を提供することを特徴とする請求項1記載の光ファイバ。
- 前記コアおよび前記クラッドが、10dB未満の1550nmでのピンアレイ曲げ損失を提供することを特徴とする請求項1または2記載の光ファイバ。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US84149006P | 2006-08-31 | 2006-08-31 | |
US60/841,490 | 2006-08-31 | ||
US11/888,959 | 2007-08-03 | ||
US11/888,959 US7620282B2 (en) | 2006-08-31 | 2007-08-03 | Low bend loss single mode optical fiber |
PCT/US2007/018870 WO2008027351A2 (en) | 2006-08-31 | 2007-08-28 | Low bend loss single mode optical fiber |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010503019A JP2010503019A (ja) | 2010-01-28 |
JP5638805B2 true JP5638805B2 (ja) | 2014-12-10 |
Family
ID=39136526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009526673A Active JP5638805B2 (ja) | 2006-08-31 | 2007-08-28 | 低曲げ損失シングルモード光ファイバ |
Country Status (5)
Country | Link |
---|---|
US (2) | US7620282B2 (ja) |
EP (1) | EP2057494A2 (ja) |
JP (1) | JP5638805B2 (ja) |
KR (1) | KR101430276B1 (ja) |
WO (1) | WO2008027351A2 (ja) |
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-
2007
- 2007-08-03 US US11/888,959 patent/US7620282B2/en active Active
- 2007-08-28 JP JP2009526673A patent/JP5638805B2/ja active Active
- 2007-08-28 KR KR1020097006466A patent/KR101430276B1/ko active IP Right Grant
- 2007-08-28 WO PCT/US2007/018870 patent/WO2008027351A2/en active Application Filing
- 2007-08-28 EP EP20070837394 patent/EP2057494A2/en not_active Ceased
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Publication number | Publication date |
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US7620282B2 (en) | 2009-11-17 |
EP2057494A2 (en) | 2009-05-13 |
KR20090049612A (ko) | 2009-05-18 |
US7903917B2 (en) | 2011-03-08 |
WO2008027351A2 (en) | 2008-03-06 |
WO2008027351A3 (en) | 2008-05-29 |
US20080056654A1 (en) | 2008-03-06 |
KR101430276B1 (ko) | 2014-08-14 |
JP2010503019A (ja) | 2010-01-28 |
US20100046899A1 (en) | 2010-02-25 |
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