JP6218744B2 - 低曲げ損失光ファイバ - Google Patents
低曲げ損失光ファイバ Download PDFInfo
- Publication number
- JP6218744B2 JP6218744B2 JP2014544860A JP2014544860A JP6218744B2 JP 6218744 B2 JP6218744 B2 JP 6218744B2 JP 2014544860 A JP2014544860 A JP 2014544860A JP 2014544860 A JP2014544860 A JP 2014544860A JP 6218744 B2 JP6218744 B2 JP 6218744B2
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- JP
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- Prior art keywords
- cladding region
- refractive index
- optical fiber
- inner cladding
- relative refractive
- 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.)
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Classifications
-
- 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
- G02B6/03622—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 2 layers only
- G02B6/03633—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 2 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
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
- G02B6/0286—Combination of graded index in the central core segment and a graded index layer external to the central core segment
-
- 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
- G02B6/03622—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 2 layers only
- G02B6/03627—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 2 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
- G02B6/036—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
-
- 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 - - +
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Glass Compositions (AREA)
- Lasers (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Description
外径r1および相対屈折率差分Δ1maxを有する中央コア領域;および
クラッド領域であって、(i)6マイクロメートル超の外径r2および相対屈折率差分Δ2を有し、0.3≦r1/r2≦0.85である第1の内側クラッド領域と、(ii)9マイクロメートル超の外径r3および最小相対屈折率差分Δ3minを有する第2の内側クラッド領域であって、半径の増加と共に負の方向に増加する相対屈折率差分を有する少なくとも1つの領域を持つ第2の内側クラッド領域と、(iii)内側クラッド領域を取り囲み、相対屈折率差分Δ4を有する外側クラッド領域とを含み、Δ1max>Δ2>Δ3min、Δ3min<Δ4であるクラッド領域;
を備えている。
外径r1、Δ1maxのピーク(最大)相対屈折率差分を有するゲルマニアドープト中央コア領域であって、1と100との間の屈折率アルファプロファイルαコア(例えば、1.8≦αコア≦100;1.8≦αコア≦2.2;2≦αコア≦100;5≦αコア≦100;2≦αコア≦20、または5≦αコア≦20)を有する中央コア領域;および
クラッド領域であって、(i)6マイクロメートル超の外径r2および相対屈折率差分Δ2を有し、0.3≦r1/r2≦0.85である第1の内側クラッド領域と、(ii)9マイクロメートル超の外径r3および最小相対屈折率差分Δ3minを有する第2の内側クラッド領域であって、半径の増加と共に負の方向に増加する相対屈折率差分を有する少なくとも1つの領域を持つ第2の内側クラッド領域と、(iii)内側クラッド領域を取り囲み、相対屈折率差分Δ4を有する外側クラッド領域とを含み、Δ1>Δ2>Δ3、Δ3<Δ4であるクラッド領域;
を備えている。
下記の表1A、1B、2A、2B、3〜5は、モデル化された説明の実施例1〜6と8〜27、製造されたファイバの実施例7、および2つの比較例のファイバの特徴を列挙している。詳しくは、表1Aおよび1Bの各実施例について、中央コア領域1の相対屈折率差分Δ1、アルファ、および外径r1、第1の内側クラッド領域2の相対屈折率差分Δ2および外径r2、第2の内側クラッド領域3の相対屈折率差分Δ3および体積V3、外側クラッド領域4の相対屈折率差分Δ4および、外側クラッド領域3の内径r3と30マイクロメートルの半径方向距離との間で計算された体積V4、およびモート体積比が下記に述べられている。
Claims (10)
- シングルモード光ファイバにおいて、
外径r1および相対屈折率Δ1を有する中央コア領域;および
クラッド領域であって、
(i)前記中央コア領域と直接隣接し、6マイクロメートル超の外径r2および相対屈折率Δ2を有し、0.3≦r1/r2≦0.85である第1の内側クラッド領域と、
(ii)前記第1の内側クラッド領域と直接隣接し、9マイクロメートル超の外径r3および最小相対屈折率Δ3を有する第2の内側クラッド領域であって、半径の増加と共に負の方向に増加する相対屈折率差分を有する少なくとも1つの領域であるトレンチを持つ第2の内側クラッド領域と、
(iii)前記内側クラッド領域を取り囲み、相対屈折率Δ4を有する外側クラッド領域とを含むクラッド領域;
を備え、
Δ1>Δ2>Δ3、Δ3<Δ4であり、且つ、0.25≦|Δ 4 −Δ 3 |≦0.7であり、
前記第2の内側クラッド領域のトレンチは、パラメータβが、1.5≧β≧0.5であり、ここで、
前記第2の内側クラッド領域の絶対値V 3 が35%Δμm 2 ≦V 3 ≦105%Δμm 2 であり、
前記第2の内側クラッド領域が有するトレンチのアルファパラメータα t が50≧α t である、
光ファイバ。 - Δ 3 とΔ2の間の絶対差が0.03より大きく、
前記ファイバが、1260nm以下の22mケーブルカットオフを示し、1300nm≦λ0≦1324nmであるゼロ分散波長λ0を有することを特徴とする、請求項1記載の光ファイバ。 - (i)r 3 から少なくとも30マイクロメートルの半径まで延在する長さについて、Δ4>Δ2、および/または
(ii) 0.33≦r1/r2、
である、請求項1または2記載の光ファイバ。 - 前記第1の内側クラッド領域がフッ素とゲルマニアを実質的に含まない、請求項1から3いずれか1項記載の光ファイバ。
- 前記第2の内側クラッド領域の外径と30μmの半径方向距離との間で計算された、前記外側クラッド領域のプロファイル体積V4が、
- 20mmの半径のマンドレルに巻き付けられたときに、0.75dB/turn未満の曲げ損失を示し、6.6と7.5の間のMAC数を示す、請求項1記載の光ファイバ。
- 15mmの半径のマンドレルに巻き付けられたときに、1dB/turn未満の曲げ損失を示す、請求項1または6記載の光ファイバ。
- 1.5≧β≧0.25である、請求項1から7いずれか1項記載の光ファイバ。
- 1.1≧β≧0.5である、請求項1から7いずれか1項記載の光ファイバ。
- 5≧αt≧0.5である、請求項1から9いずれか1項記載の光ファイバ。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161564902P | 2011-11-30 | 2011-11-30 | |
US61/564,902 | 2011-11-30 | ||
PCT/US2012/066949 WO2013082217A1 (en) | 2011-11-30 | 2012-11-29 | Low bend loss optical fiber |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2015503122A JP2015503122A (ja) | 2015-01-29 |
JP6218744B2 true JP6218744B2 (ja) | 2017-10-25 |
Family
ID=47459118
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2014544860A Active JP6218744B2 (ja) | 2011-11-30 | 2012-11-29 | 低曲げ損失光ファイバ |
Country Status (10)
Country | Link |
---|---|
US (2) | US8588569B2 (ja) |
EP (1) | EP2786185B1 (ja) |
JP (1) | JP6218744B2 (ja) |
KR (1) | KR20140097338A (ja) |
CN (1) | CN104254793B (ja) |
BR (1) | BR112014013128A2 (ja) |
DK (1) | DK2786185T3 (ja) |
IN (1) | IN2014DN04698A (ja) |
RU (1) | RU2014126430A (ja) |
WO (1) | WO2013082217A1 (ja) |
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-
2012
- 2012-05-31 US US13/485,028 patent/US8588569B2/en active Active
- 2012-11-19 US US13/680,641 patent/US8953917B2/en active Active
- 2012-11-29 KR KR1020147015711A patent/KR20140097338A/ko not_active Application Discontinuation
- 2012-11-29 IN IN4698DEN2014 patent/IN2014DN04698A/en unknown
- 2012-11-29 DK DK12808572.7T patent/DK2786185T3/en active
- 2012-11-29 BR BR112014013128A patent/BR112014013128A2/pt not_active Application Discontinuation
- 2012-11-29 EP EP12808572.7A patent/EP2786185B1/en active Active
- 2012-11-29 RU RU2014126430A patent/RU2014126430A/ru not_active Application Discontinuation
- 2012-11-29 CN CN201280068372.7A patent/CN104254793B/zh active Active
- 2012-11-29 WO PCT/US2012/066949 patent/WO2013082217A1/en active Application Filing
- 2012-11-29 JP JP2014544860A patent/JP6218744B2/ja active Active
Also Published As
Publication number | Publication date |
---|---|
DK2786185T3 (en) | 2016-09-26 |
IN2014DN04698A (ja) | 2015-05-15 |
US8588569B2 (en) | 2013-11-19 |
US20130136405A1 (en) | 2013-05-30 |
KR20140097338A (ko) | 2014-08-06 |
WO2013082217A1 (en) | 2013-06-06 |
US8953917B2 (en) | 2015-02-10 |
CN104254793B (zh) | 2019-07-09 |
BR112014013128A2 (pt) | 2017-06-13 |
CN104254793A (zh) | 2014-12-31 |
JP2015503122A (ja) | 2015-01-29 |
EP2786185B1 (en) | 2016-06-15 |
EP2786185A1 (en) | 2014-10-08 |
US20130136407A1 (en) | 2013-05-30 |
RU2014126430A (ru) | 2016-01-27 |
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