JP5945516B2 - 光ファイバ - Google Patents
光ファイバ Download PDFInfo
- Publication number
- JP5945516B2 JP5945516B2 JP2013083010A JP2013083010A JP5945516B2 JP 5945516 B2 JP5945516 B2 JP 5945516B2 JP 2013083010 A JP2013083010 A JP 2013083010A JP 2013083010 A JP2013083010 A JP 2013083010A JP 5945516 B2 JP5945516 B2 JP 5945516B2
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- JP
- Japan
- Prior art keywords
- core
- optical fiber
- refractive index
- wavelength
- less
- 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
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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
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
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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
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
- G02B6/0283—Graded index region external to the central core segment, e.g. sloping layer or triangular or trapezoidal layer
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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
-
- 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
- G02B6/02214—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
- G02B6/02228—Dispersion flattened fibres, i.e. having a low dispersion variation over an extended wavelength range
- G02B6/02238—Low dispersion slope 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
- G02B6/02214—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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Glass Compositions (AREA)
Description
[特許文献1]米国特許4,852,968号
Claims (3)
- 中心部に第1コア、第1コアに隣接してその外周を覆う第2コア、第2コアに隣接してその外周を覆う第3コア、及び第3コアに隣接してその外周を覆うクラッドからなり、
該クラッドの屈折率を基準にしたときの、第1コアの比屈折率差の最大値がΔ1であり、第2コアの平坦部の比屈折率差がΔ2であり、第3コアの比屈折率差の最小値がΔ3であり、前記第2コアの比屈折率差の最大値Δ2maxが、Δ2max=(Δ1)/2であり、前記第2コアの比屈折率差の最小値Δ2minが、Δ2min=(Δ3)/2であり、第1コアのΔ1に対する半値半径幅がaであり、第3コアの前記Δ3の半値半径幅に対する、第2コアと第3コアとの境界の半径がbであり、 第3コアとクラッドとの境界の半径がcであり、0.30%≦Δ1≦0.45%、−0.05%≦Δ2≦0.05%、−0.35%≦Δ3≦−0.15%、2.5≦b/a、3.5μm≦a≦4.2μm、9μm≦b≦13μm、4.5μm≦c−b≦7.0μmを満たし、零分散波長が1300nm以上1324nm以下であり、直径10mmのマンドレルに光ファイバを巻きつけたときの波長1550nmにおける損失増加が1dB/turn以下であり、波長1310nmにおけるLP01モードのモードフィールド直径が8.2μm以上10.0μm以下であり、前記bが1310nmにおけるモードフィールド直径の1.21倍以上であることを特徴とする光ファイバ。 - 請求項1に記載の光ファイバにおいて、ITU−TG.650規格に定められた 22mの光ファイバで測定するケーブル・カットオフ波長が1260nm以下であることを特徴とする光ファイバ。
- 請求項1または2に記載の光ファイバにおいて、波長1383nmにおける伝送損失が0.35dB/km以下であることを特徴とする光ファイバ。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013083010A JP5945516B2 (ja) | 2012-04-26 | 2013-04-11 | 光ファイバ |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012101744 | 2012-04-26 | ||
JP2012101744 | 2012-04-26 | ||
JP2013083010A JP5945516B2 (ja) | 2012-04-26 | 2013-04-11 | 光ファイバ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2013242545A JP2013242545A (ja) | 2013-12-05 |
JP5945516B2 true JP5945516B2 (ja) | 2016-07-05 |
Family
ID=48190272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2013083010A Active JP5945516B2 (ja) | 2012-04-26 | 2013-04-11 | 光ファイバ |
Country Status (5)
Country | Link |
---|---|
US (1) | US8837891B2 (ja) |
EP (1) | EP2657733B1 (ja) |
JP (1) | JP5945516B2 (ja) |
KR (1) | KR101436723B1 (ja) |
CN (1) | CN103376504B (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9989699B2 (en) * | 2016-10-27 | 2018-06-05 | Corning Incorporated | Low bend loss single mode optical fiber |
JP7371011B2 (ja) | 2018-12-12 | 2023-10-30 | 古河電気工業株式会社 | 光ファイバおよび光ファイバの製造方法 |
JP7019617B2 (ja) | 2019-02-07 | 2022-02-15 | 古河電気工業株式会社 | 光ファイバおよび光ファイバの製造方法 |
JP7060532B2 (ja) | 2019-02-25 | 2022-04-26 | 古河電気工業株式会社 | 光ファイバおよび光ファイバの製造方法 |
JP7145814B2 (ja) | 2019-05-27 | 2022-10-03 | 古河電気工業株式会社 | 光ファイバ |
WO2021193260A1 (ja) * | 2020-03-27 | 2021-09-30 | 古河電気工業株式会社 | 光ファイバ |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4852968A (en) | 1986-08-08 | 1989-08-01 | American Telephone And Telegraph Company, At&T Bell Laboratories | Optical fiber comprising a refractive index trench |
US6768852B2 (en) * | 2001-07-11 | 2004-07-27 | Corning Incorporated | Dispersion and slope compensating optical fiber and transmission link including same |
US7043125B2 (en) * | 2001-07-30 | 2006-05-09 | Corning Incorporated | Optical waveguide fiber for local access |
KR100820926B1 (ko) * | 2003-04-11 | 2008-04-10 | 가부시키가이샤후지쿠라 | 광파이버 |
FR2930997B1 (fr) * | 2008-05-06 | 2010-08-13 | Draka Comteq France Sa | Fibre optique monomode |
CN101598834B (zh) * | 2009-06-26 | 2011-01-19 | 长飞光纤光缆有限公司 | 一种单模光纤及其制造方法 |
-
2013
- 2013-02-28 KR KR1020130022170A patent/KR101436723B1/ko active IP Right Grant
- 2013-04-11 JP JP2013083010A patent/JP5945516B2/ja active Active
- 2013-04-23 CN CN201310143020.XA patent/CN103376504B/zh active Active
- 2013-04-25 US US13/869,972 patent/US8837891B2/en active Active
- 2013-04-26 EP EP13165550.8A patent/EP2657733B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20130287352A1 (en) | 2013-10-31 |
EP2657733A1 (en) | 2013-10-30 |
KR101436723B1 (ko) | 2014-09-01 |
KR20130121008A (ko) | 2013-11-05 |
US8837891B2 (en) | 2014-09-16 |
CN103376504B (zh) | 2016-08-17 |
JP2013242545A (ja) | 2013-12-05 |
CN103376504A (zh) | 2013-10-30 |
EP2657733B1 (en) | 2017-07-05 |
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