JP5163124B2 - 光ファイバ - Google Patents
光ファイバ Download PDFInfo
- Publication number
- JP5163124B2 JP5163124B2 JP2007532119A JP2007532119A JP5163124B2 JP 5163124 B2 JP5163124 B2 JP 5163124B2 JP 2007532119 A JP2007532119 A JP 2007532119A JP 2007532119 A JP2007532119 A JP 2007532119A JP 5163124 B2 JP5163124 B2 JP 5163124B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- refractive index
- central core
- index difference
- ratio
- 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.)
- Expired - Fee Related
Links
- 239000013307 optical fiber Substances 0.000 title claims description 206
- 230000000994 depressogenic effect Effects 0.000 claims description 89
- 238000005253 cladding Methods 0.000 claims description 52
- 230000003287 optical effect Effects 0.000 claims description 21
- 238000005452 bending Methods 0.000 claims description 20
- 238000004804 winding Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 description 49
- 230000000052 comparative effect Effects 0.000 description 26
- 239000006185 dispersion Substances 0.000 description 25
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007526 fusion splicing Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000000699 topical effect Effects 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
- G02B6/036—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
- G02B6/03644—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
-
- 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
- G02B6/02252—Negative dispersion fibres at 1550 nm
- G02B6/02261—Dispersion compensating fibres, i.e. for compensating positive dispersion of other 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
- G02B6/036—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
- G02B6/02214—Optical fibres with cladding with or without a coating tailored to obtain the desired dispersion, e.g. dispersion shifted, dispersion flattened
- G02B6/0228—Characterised by the wavelength dispersion slope properties around 1550 nm
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06725—Fibre characterized by a specific dispersion, e.g. for pulse shaping in soliton lasers or for dispersion compensating [DCF]
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Description
まず、この発明に係る光ファイバの第1実施例について、比較例に係る光ファイバと対比しつつ説明する。図1は、第1実施例に係る光ファイバAの構造示す図であり、領域(a)には、この第1実施例に係る光ファイバAの断面構造、領域(b)には、その屈折率プロファイルが示されている。また、図2は、比較例に係る光ファイバBを示す図であり、領域(a)には、この比較例に係る光ファイバBの断面構造、領域(b)には、その屈折率プロファイルが示されている。
図18は、この発明に係る光ファイバCの構造を示す図であり、領域(a)には、この第2実施例に係る光ファイバCの断面構造、領域(b)には、その屈折率プロファイルが示されている。なお、この第2実施例に係る光ファイバCも、上述の第1実施例に係る光ファイバAと同様に、図17に示されたような光ファイバコイルへの適用も可能である。
Claims (7)
- 最大屈折率N1及び外径2aを有する中心コア部と、該中心コア部の外周に設けられた、最小屈折率N2及び外径2bを有するディプレスト部と、該ディプレスト部の外周に設けられた、最大屈折率N3を有するクラッド部とを少なくとも備えた、1.0μm以上かつ1.1μm以下の波長帯を使用波長帯とする光パルス拡大用の光ファイバであって、
前記中心コア部の外径2aは、1.4μm以上かつ4.0μm以下であり、
前記中心コア部の外径2aと前記ディプレスト部の外径2bとの比Ra(=2a/2b)は、0.2以上かつ0.6未満であり、
前記中心コア部、前記ディプレスト部、及び前記クラッド部の各最大屈折率は、以下の関係を満たし、
N1>N3>N2
前記クラッド部に対する前記中心コア部の比屈折率差Δ1は1.0%より大きく、前記クラッド部に対する前記ディプレスト部の比屈折率差Δ2は−0.3%より小さく、
波長1.05μmにおいて、周波数ωによる伝搬定数βの2階微分値β2は正であり、周波数ωによる伝搬定数βの3階微分値β3は負であり、前記3階微分値β3と前記2階微分値β2との比(β3/β2)は−0.002ps以下である光ファイバ。 - 請求項1記載の光ファイバにおいて、
前記中心コア部の比屈折率差Δ1は、1.7%以上である。 - 請求項1記載の光ファイバにおいて、
前記ディプレスト部の比屈折率差Δ2は、−0.5%以下である。 - 請求項1記載の光ファイバにおいて、
直径40mmに巻かれたときの曲げ損失は、波長1.05μmにおいて100dB/m以下である。 - 請求項1記載の光ファイバは、さらに、
前記ディプレスト部と前記クラッド部との間に設けられた、最大屈折率N4を有するとともに外径2cを有するリング部を備え、
前記中心コア部、前記ディプレスト部、前記リング部、及び前記クラッド部の各最大屈折率は、以下の関係を満たしている。
N1>N4>N3>N2 - コイル状に巻かれた、請求項1〜5のいずれか一項記載の光ファイバを含む光ファイバコイル。
- 請求項6記載の光ファイバコイルにおいて、
前記光ファイバの最小巻き直径は、120mm以下である。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007532119A JP5163124B2 (ja) | 2005-08-22 | 2006-08-22 | 光ファイバ |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005240063 | 2005-08-22 | ||
JP2005240063 | 2005-08-22 | ||
JP2007532119A JP5163124B2 (ja) | 2005-08-22 | 2006-08-22 | 光ファイバ |
PCT/JP2006/316391 WO2007023801A1 (ja) | 2005-08-22 | 2006-08-22 | 光ファイバ |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2007023801A1 JPWO2007023801A1 (ja) | 2009-03-26 |
JP5163124B2 true JP5163124B2 (ja) | 2013-03-13 |
Family
ID=37771546
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007532119A Expired - Fee Related JP5163124B2 (ja) | 2005-08-22 | 2006-08-22 | 光ファイバ |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1925956B1 (ja) |
JP (1) | JP5163124B2 (ja) |
DK (1) | DK1925956T3 (ja) |
RU (1) | RU2413258C2 (ja) |
WO (1) | WO2007023801A1 (ja) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8403999B2 (en) | 2009-12-22 | 2013-03-26 | L'oreal | Dyeing and/or bleaching composition comprising a polycondensate of ethylene oxide and propylene oxide |
US8419807B2 (en) | 2009-10-13 | 2013-04-16 | L'oreal | Composition including a glyceride and an organophosphonic acid or one of the salts thereof, dyeing or colour-lightening method implementing same and devices |
US8551188B2 (en) | 2009-09-02 | 2013-10-08 | L'oreal | Composition comprising a hydrophobic dye, a particular organic and/or mineral alkaline agent, a particular compound (I) and a particular organic compound (II), and dyeing use thereof |
US8790623B2 (en) | 2005-01-18 | 2014-07-29 | Il'Oreal | Composition for treating keratin fibers, comprising at least one aromatic alcohol, at least one aromatic carboxylic acid, and at least one protecting agent |
US9044412B2 (en) | 2011-07-05 | 2015-06-02 | L'oreal | Dye composition using a long-chain ether of an alkoxylated fatty alcohol and a cationic polymer, processes and devices using the same |
US9060944B2 (en) | 2011-07-05 | 2015-06-23 | L'oreal | Cosmetic composition rich in fatty substances comprising a polyoxyalkylenated fatty alcohol ether and a direct dye and/or an oxidation dye, the dyeing method and the device |
US9066890B2 (en) | 2011-07-05 | 2015-06-30 | L'oreal | Dye composition comprising an alkoxylated fatty alcohol ether and a fatty alcohol |
US9078828B2 (en) | 2011-12-16 | 2015-07-14 | L'oreal | Cationic tetrahydropyrazolopyridines, dye composition comprising such oxidation bases, implementation process therefor and use thereof |
US9107848B2 (en) | 2011-12-16 | 2015-08-18 | L'oreal | Coupler with cationic 7-amino-1,2,3,4-tetrahydroquinoline structure, dyeing composition comprising same, processes and uses |
US9226879B2 (en) | 2011-09-30 | 2016-01-05 | L'oreal | Foam dye composition comprising at least one particular oxyethylenated nonionic surfactant |
US9233060B2 (en) | 2011-12-16 | 2016-01-12 | L'oreal | Coupler with 7-amino-1,2,3,4-tetrahydroquinoline structure, dyeing composition comprising same, processes and uses |
US9463148B2 (en) | 2011-09-30 | 2016-10-11 | L'oreal | Foam dye composition comprising a polycondensate of ethylene oxide and propylene oxide |
US9554977B2 (en) | 2011-12-13 | 2017-01-31 | L'oreal | Triaromatic azomethine direct dyes, dye composition comprising at least one such dye, method of implementation and use |
US10251830B2 (en) | 2011-12-21 | 2019-04-09 | L'oreal | Oxidizing composition for treating keratin fibres, comprising a phosphoric acid mineral salt, and processes therefor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016148749A (ja) * | 2015-02-12 | 2016-08-18 | 株式会社フジクラ | 分散シフト光ファイバ |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2002118315A (ja) * | 2000-05-23 | 2002-04-19 | Imra America Inc | モジュール式、高エネルギ、広波長可変性、超高速、ファイバ光源 |
JP2003270469A (ja) * | 2002-03-08 | 2003-09-25 | Fitel Usa Corp | 高い良度指数を有する分散−補正ファイバ |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5847863A (en) * | 1996-04-25 | 1998-12-08 | Imra America, Inc. | Hybrid short-pulse amplifiers with phase-mismatch compensated pulse stretchers and compressors |
US7224518B2 (en) * | 2003-02-25 | 2007-05-29 | Toptica Photonics Ag | Fiber-optic amplification of light pulses |
-
2006
- 2006-08-22 RU RU2008110935/28A patent/RU2413258C2/ru active
- 2006-08-22 EP EP06782895.4A patent/EP1925956B1/en not_active Not-in-force
- 2006-08-22 JP JP2007532119A patent/JP5163124B2/ja not_active Expired - Fee Related
- 2006-08-22 DK DK06782895.4T patent/DK1925956T3/en active
- 2006-08-22 WO PCT/JP2006/316391 patent/WO2007023801A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002118315A (ja) * | 2000-05-23 | 2002-04-19 | Imra America Inc | モジュール式、高エネルギ、広波長可変性、超高速、ファイバ光源 |
JP2003270469A (ja) * | 2002-03-08 | 2003-09-25 | Fitel Usa Corp | 高い良度指数を有する分散−補正ファイバ |
Non-Patent Citations (2)
Title |
---|
JPN6012043075; AINSLIE,B.J. et al.: 'A Review of Single-Mode Fibers with Modified Dispersion Characteristics.' Journal of Lightwave Technology Vol.LT-4, No.8, 198608, p.967-979 * |
JPN6012059535; M.E.Fermann et al.: 'Third-order dispersion control in ultrafast Yb fiber amplifiers' Advanced Solid-State Lasers, Topical Meeting, Technical Digest , 20011130, p.355-358 (TuA3) * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8790623B2 (en) | 2005-01-18 | 2014-07-29 | Il'Oreal | Composition for treating keratin fibers, comprising at least one aromatic alcohol, at least one aromatic carboxylic acid, and at least one protecting agent |
US8551188B2 (en) | 2009-09-02 | 2013-10-08 | L'oreal | Composition comprising a hydrophobic dye, a particular organic and/or mineral alkaline agent, a particular compound (I) and a particular organic compound (II), and dyeing use thereof |
US8419807B2 (en) | 2009-10-13 | 2013-04-16 | L'oreal | Composition including a glyceride and an organophosphonic acid or one of the salts thereof, dyeing or colour-lightening method implementing same and devices |
US8403999B2 (en) | 2009-12-22 | 2013-03-26 | L'oreal | Dyeing and/or bleaching composition comprising a polycondensate of ethylene oxide and propylene oxide |
US9066890B2 (en) | 2011-07-05 | 2015-06-30 | L'oreal | Dye composition comprising an alkoxylated fatty alcohol ether and a fatty alcohol |
US9060944B2 (en) | 2011-07-05 | 2015-06-23 | L'oreal | Cosmetic composition rich in fatty substances comprising a polyoxyalkylenated fatty alcohol ether and a direct dye and/or an oxidation dye, the dyeing method and the device |
US9044412B2 (en) | 2011-07-05 | 2015-06-02 | L'oreal | Dye composition using a long-chain ether of an alkoxylated fatty alcohol and a cationic polymer, processes and devices using the same |
US9226879B2 (en) | 2011-09-30 | 2016-01-05 | L'oreal | Foam dye composition comprising at least one particular oxyethylenated nonionic surfactant |
US9463148B2 (en) | 2011-09-30 | 2016-10-11 | L'oreal | Foam dye composition comprising a polycondensate of ethylene oxide and propylene oxide |
US9554977B2 (en) | 2011-12-13 | 2017-01-31 | L'oreal | Triaromatic azomethine direct dyes, dye composition comprising at least one such dye, method of implementation and use |
US9078828B2 (en) | 2011-12-16 | 2015-07-14 | L'oreal | Cationic tetrahydropyrazolopyridines, dye composition comprising such oxidation bases, implementation process therefor and use thereof |
US9107848B2 (en) | 2011-12-16 | 2015-08-18 | L'oreal | Coupler with cationic 7-amino-1,2,3,4-tetrahydroquinoline structure, dyeing composition comprising same, processes and uses |
US9233060B2 (en) | 2011-12-16 | 2016-01-12 | L'oreal | Coupler with 7-amino-1,2,3,4-tetrahydroquinoline structure, dyeing composition comprising same, processes and uses |
US10251830B2 (en) | 2011-12-21 | 2019-04-09 | L'oreal | Oxidizing composition for treating keratin fibres, comprising a phosphoric acid mineral salt, and processes therefor |
Also Published As
Publication number | Publication date |
---|---|
EP1925956A4 (en) | 2012-03-14 |
JPWO2007023801A1 (ja) | 2009-03-26 |
EP1925956A1 (en) | 2008-05-28 |
EP1925956B1 (en) | 2014-12-03 |
WO2007023801A1 (ja) | 2007-03-01 |
RU2413258C2 (ru) | 2011-02-27 |
RU2008110935A (ru) | 2009-09-27 |
DK1925956T3 (en) | 2015-01-05 |
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