JP2020204727A - 光ファイバ - Google Patents
光ファイバ Download PDFInfo
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- JP2020204727A JP2020204727A JP2019112800A JP2019112800A JP2020204727A JP 2020204727 A JP2020204727 A JP 2020204727A JP 2019112800 A JP2019112800 A JP 2019112800A JP 2019112800 A JP2019112800 A JP 2019112800A JP 2020204727 A JP2020204727 A JP 2020204727A
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- JP
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- Prior art keywords
- core
- optical fiber
- clad layer
- refractive index
- clad
- Prior art date
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 100
- 230000005540 biological transmission Effects 0.000 claims abstract description 37
- 229910052783 alkali metal Inorganic materials 0.000 claims description 14
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 13
- 239000002585 base Substances 0.000 claims description 9
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 8
- 150000001340 alkali metals Chemical class 0.000 claims description 7
- 238000005253 cladding Methods 0.000 abstract description 11
- 238000005452 bending Methods 0.000 abstract description 8
- 238000009826 distribution Methods 0.000 description 43
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 24
- 229910052700 potassium Inorganic materials 0.000 description 24
- 239000011591 potassium Substances 0.000 description 24
- 238000010586 diagram Methods 0.000 description 22
- 239000011521 glass Substances 0.000 description 12
- 238000009792 diffusion process Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 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 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
Images
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
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
- G02B6/0288—Multimode fibre, e.g. graded index core for compensating modal dispersion
-
- 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 - +
-
- 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
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
-
- 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
- G02B6/02019—Effective area greater than 90 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
- G02B6/028—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
-
- 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
- G02B6/03694—Multiple layers differing in properties other than the refractive index, e.g. attenuation, diffusion, stress properties
-
- 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
-
- 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
- C03B2201/50—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with alkali metals
-
- 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
- C03B2201/54—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with beryllium, magnesium or alkaline earth metals
-
- 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
-
- 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
Abstract
Description
最初に本開示の実施態様を列記して説明する。実施形態に係る光ファイバは、コアと、コアを取り囲むクラッドと、を備え、クラッドは、コアを取り囲む内クラッド層と、内クラッド層を取り囲む外クラッド層と、を備え、コアの比屈折率差の最大値Δn1max、内クラッド層の比屈折率差の最小値Δn2min、外クラッド層の比屈折率差の最大値Δn3maxは、Δn2min<n3max<Δn1maxなる関係を満足しており、径方向位置rにおける残留応力σ(r)は、クラッドにおいて、|dσ(r)/dr|≦30MPa/μmである。
本開示の光ファイバの具体例を、以下に図面を参照しつつ説明する。なお、本発明はこれらの例示に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。図面の説明において同一の要素には同一の符号を付し、重複する説明を省略する。
Claims (10)
- コアと、前記コアを取り囲むクラッドと、を備え、
前記クラッドは、前記コアを取り囲む内クラッド層と、前記内クラッド層を取り囲む外クラッド層と、を備え、
前記コアの比屈折率差の最大値Δn1max、前記内クラッド層の比屈折率差の最小値Δn2min、前記外クラッド層の比屈折率差の最大値Δn3maxは、Δn2min<n3max<Δn1maxなる関係を満足しており、
径方向位置rにおける残留応力σ(r)は、前記クラッドにおいて、|dσ(r)/dr|≦30MPa/μmである、光ファイバ。 - 残留応力をσとし、径方向位置をrとしたとき、前記クラッドにおいて、|dσ/dr|≦20MPa/μmである、請求項1に記載の光ファイバ。
- 波長1550nmにおける基底モードの実効断面積は、100μm2以上である、請求項1又は2に記載の光ファイバ。
- ケーブルカットオフ波長は、1530nm以下である、請求項3に記載の光ファイバ。
- 前記コアの全域に圧縮応力が残留している、請求項1から請求項4のいずれか一項に記載の光ファイバ。
- 前記コアは、アルカリ金属元素又はアルカリ土類金属元素を含む、請求項1から請求項5のいずれか一項に記載の光ファイバ。
- 波長1550nmにおける伝送損失は、0.174dB/km以下である、請求項1から請求項6のいずれか一項に記載の光ファイバ。
- 波長1550nmにおける伝送損失は、0.164dB/km以下である、請求項1から請求項6のいずれか一項に記載の光ファイバ。
- 波長1550nmにおける伝送損失は、0.154dB/km以下である、請求項1から請求項6のいずれか一項に記載の光ファイバ。
- コアと、前記コアを取り囲むクラッドと、を備え、
前記クラッドは、前記コアを取り囲む内クラッド層と、前記内クラッド層を取り囲む外クラッド層と、を備え、
前記コアの比屈折率差の最大値Δn1max、前記内クラッド層の比屈折率差の最小値Δn2min、前記外クラッド層の比屈折率差の最大値Δn3maxは、−0.15%<Δn1max<0.05%、−0.5%<Δn2min<−0.2%、及び、0.02%<Δn3max−Δn2min<0.2%なる関係をそれぞれ満足しており、
前記コア及び前記内クラッド層は、アルカリ金属元素又はアルカリ土類金属元素を含み、
前記外クラッド層は、アルカリ金属元素及びアルカリ土類金属元素を含まず、
前記内クラッド層及び前記外クラッド層の比屈折率差の径方向に対する微分値の絶対値は、0.2%/μm以下であり、
径方向位置rにおける残留応力σ(r)は、前記クラッドにおいて、|dσ(r)/dr|≦30MPa/μmである、光ファイバ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019112800A JP7326906B2 (ja) | 2019-06-18 | 2019-06-18 | 光ファイバ |
US16/899,006 US20200400879A1 (en) | 2019-06-18 | 2020-06-11 | Optical fiber |
DK20180220.4T DK3754394T3 (da) | 2019-06-18 | 2020-06-16 | Optisk fiber |
EP20180220.4A EP3754394B1 (en) | 2019-06-18 | 2020-06-16 | Optical fiber |
CN202010546314.7A CN112099134A (zh) | 2019-06-18 | 2020-06-16 | 光纤 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019112800A JP7326906B2 (ja) | 2019-06-18 | 2019-06-18 | 光ファイバ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2020204727A true JP2020204727A (ja) | 2020-12-24 |
JP7326906B2 JP7326906B2 (ja) | 2023-08-16 |
Family
ID=71103279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2019112800A Active JP7326906B2 (ja) | 2019-06-18 | 2019-06-18 | 光ファイバ |
Country Status (5)
Country | Link |
---|---|
US (1) | US20200400879A1 (ja) |
EP (1) | EP3754394B1 (ja) |
JP (1) | JP7326906B2 (ja) |
CN (1) | CN112099134A (ja) |
DK (1) | DK3754394T3 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023119925A1 (ja) * | 2021-12-24 | 2023-06-29 | 住友電気工業株式会社 | 屈曲光ファイバ、屈曲光ファイバの製造方法、および光接続部品 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6515795B1 (en) * | 2001-06-29 | 2003-02-04 | Corning Incorporated | Borosilicate cladding glasses for germanate core thulium-doped amplifiers |
JP2003207675A (ja) * | 2002-01-11 | 2003-07-25 | Sumitomo Electric Ind Ltd | 石英系光ファイバ及びその製造方法 |
JP2007297254A (ja) * | 2006-05-02 | 2007-11-15 | Hitachi Cable Ltd | 光ファイバ |
JP2013018699A (ja) * | 2011-06-15 | 2013-01-31 | Sumitomo Electric Ind Ltd | 光ファイバ製造方法 |
JP2014010412A (ja) * | 2012-07-03 | 2014-01-20 | Hitachi Cable Ltd | シングルモード光ファイバ |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4459720B2 (ja) * | 2004-05-31 | 2010-04-28 | 株式会社フジクラ | 光ファイバ素線の製造方法 |
JP2013061559A (ja) * | 2011-09-14 | 2013-04-04 | Sumitomo Electric Ind Ltd | 光ファイバ |
US9658394B2 (en) | 2014-06-24 | 2017-05-23 | Corning Incorporated | Low attenuation fiber with viscosity matched core and inner clad |
US9658395B2 (en) | 2014-10-21 | 2017-05-23 | Ofs Fitel, Llc | Low loss optical fiber and method of making the same |
JP6690296B2 (ja) * | 2016-02-26 | 2020-04-28 | 住友電気工業株式会社 | 光ファイバ |
-
2019
- 2019-06-18 JP JP2019112800A patent/JP7326906B2/ja active Active
-
2020
- 2020-06-11 US US16/899,006 patent/US20200400879A1/en not_active Abandoned
- 2020-06-16 EP EP20180220.4A patent/EP3754394B1/en active Active
- 2020-06-16 CN CN202010546314.7A patent/CN112099134A/zh active Pending
- 2020-06-16 DK DK20180220.4T patent/DK3754394T3/da active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6515795B1 (en) * | 2001-06-29 | 2003-02-04 | Corning Incorporated | Borosilicate cladding glasses for germanate core thulium-doped amplifiers |
JP2003207675A (ja) * | 2002-01-11 | 2003-07-25 | Sumitomo Electric Ind Ltd | 石英系光ファイバ及びその製造方法 |
JP2007297254A (ja) * | 2006-05-02 | 2007-11-15 | Hitachi Cable Ltd | 光ファイバ |
JP2013018699A (ja) * | 2011-06-15 | 2013-01-31 | Sumitomo Electric Ind Ltd | 光ファイバ製造方法 |
JP2014010412A (ja) * | 2012-07-03 | 2014-01-20 | Hitachi Cable Ltd | シングルモード光ファイバ |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023119925A1 (ja) * | 2021-12-24 | 2023-06-29 | 住友電気工業株式会社 | 屈曲光ファイバ、屈曲光ファイバの製造方法、および光接続部品 |
Also Published As
Publication number | Publication date |
---|---|
EP3754394A1 (en) | 2020-12-23 |
US20200400879A1 (en) | 2020-12-24 |
DK3754394T3 (da) | 2022-11-07 |
EP3754394B1 (en) | 2022-09-21 |
CN112099134A (zh) | 2020-12-18 |
JP7326906B2 (ja) | 2023-08-16 |
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