DK1925956T3 - Optisk fiber - Google Patents

Optisk fiber Download PDF

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Publication number
DK1925956T3
DK1925956T3 DK06782895.4T DK06782895T DK1925956T3 DK 1925956 T3 DK1925956 T3 DK 1925956T3 DK 06782895 T DK06782895 T DK 06782895T DK 1925956 T3 DK1925956 T3 DK 1925956T3
Authority
DK
Denmark
Prior art keywords
optical fiber
refractive index
central core
index difference
core portion
Prior art date
Application number
DK06782895.4T
Other languages
English (en)
Inventor
Masaaki Hirano
Original Assignee
Sumitomo Electric Industries
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries filed Critical Sumitomo Electric Industries
Application granted granted Critical
Publication of DK1925956T3 publication Critical patent/DK1925956T3/da

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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
    • G02B6/03638—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]

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  • 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)

Claims (9)

  1. PATENTKRAV’
    1. Optisk fiber, som omfatter i det mindste: en central kernedel (11) med et maksimalt brydningsindeks Nh og en udvendig diameter (2a); en nedtrykt del (12), tilvejebragt på en udvendig periferi af den centrale kernedel (11), som har et minimalt brydningsindeks N2 og en udvendig diameter (2b); og en kappedel (13), tilvejebragt på en udvendig periferi af den nedtrykte del (12), som har et maksimalt brydningsindeks N3, kendetegnet ved, at de respektive maksimale brydningsindeks for en central kernedel (11), den nedtrykte del (12) og kappedelen (13) opfylder følgende relation; N-|^N3^N2, hvor en relativ brydningsindeksdifferens Δ1 af den centrale kernedel (11) i forhold til kappedelen (13) er større end 1%, og en relativ brydningsindeksdifferens Δ2 af den nedtrykte del (12) i forhold til kappedelen (13) er mindre end -0,3%, og at ved en bølgelængde på 1,05 pm er den anden afledte β2 for udbredelseskonstanten β med hensyn til frekvens ω positiv, den tredje afledte β3 for udbredelseskonstanten β med hensyn til frekvens ω er negativ, og forholdet (β3/β2) imellem den tredje afledte β3 og den anden afledte β2 er -0,002 ps eller mindre.
  2. 2. Optisk fiber ifølge krav 1, hvor et forhold Ra(=2a/2b) imellem den udvendige diameter (2a) af den centrale kernedel (11) og den udvendige diameter (2b) af den nedtrykte del (12) er 0,2 eller mere, men mindre end 0,6.
  3. 3. Optisk fiber ifølge krav 1, hvor den relative brydningsindeksdifferens Δ-ι for den centrale kernedel (11) er 1,7% eller mere.
  4. 4. Optisk fiber ifølge krav 1, hvor den relative brydningsindeksdifferens Δ2 for den nedtrykte del (12) er -0,5% eller mindre.
  5. 5. Optisk fiber ifølge krav 1, hvor den udvendige diameter (2a) af den centrale kernedel (12) er 1,4 pm eller mere men 4 pm eller mindre.
  6. 6. Optisk fiber ifølge krav 1, som har et bøjningstab på 100 dB/m eller mindre ved bølgelængden på 1,05 pm, når den vikles i en diameter på 40 mm.
  7. 7. Optisk fiber ifølge krav 1, som yderligere omfatter en ringdel (44) tilvejebragt imellem den nedtrykte del og kappedelen (13), og som har et maksimalt brydningsindeks N4 og en udvendig diameter (2c), hvor de respektive maksimale brydningsindeks for den centrale kernedel (11), den nedtrykte del (12), ringdelen (44) og kappedelen (13) opfylder følgende relation: Ni>N4>N3>N2·
  8. 8. Optisk fiberspole omfattende en optisk fiber i overensstemmelse med ethvert af kravene 1 til 7, hvor denne er viklet i en spoleform.
  9. 9. Optisk fiberspole ifølge krav 8, hvor den minimale viklede diameter af den optiske fiber er 120 mm eller mindre.
DK06782895.4T 2005-08-22 2006-08-22 Optisk fiber DK1925956T3 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005240063 2005-08-22
PCT/JP2006/316391 WO2007023801A1 (ja) 2005-08-22 2006-08-22 光ファイバ

Publications (1)

Publication Number Publication Date
DK1925956T3 true DK1925956T3 (da) 2015-01-05

Family

ID=37771546

Family Applications (1)

Application Number Title Priority Date Filing Date
DK06782895.4T DK1925956T3 (da) 2005-08-22 2006-08-22 Optisk fiber

Country Status (5)

Country Link
EP (1) EP1925956B1 (da)
JP (1) JP5163124B2 (da)
DK (1) DK1925956T3 (da)
RU (1) RU2413258C2 (da)
WO (1) WO2007023801A1 (da)

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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
EP2473152B1 (fr) 2009-09-02 2020-03-18 L'Oréal Composition comprenant un colorant hydrophobe, un agent alcalin organique et/ou minéral particulier, un composé particulier (i) et un composé organique particulier (ii), et son utilisation en coloration
FR2951080B1 (fr) 2009-10-13 2012-01-20 Oreal Composition comprenant un corps gras et un acide organophosphonique ou l'un de ses sels, procede de coloration ou d'eclaircissement la mettant en oeuvre et dispositifs
CN107595671A (zh) 2009-12-22 2018-01-19 莱雅公司 包含环氧乙烷和环氧丙烷的缩聚物的染色和/或漂白组合物
EP2729115B1 (en) 2011-07-05 2016-12-28 L'oreal Dye composition comprising an alkoxylated fatty alcohol ether and a fatty alcohol or a fatty acid ester
CN103619321A (zh) 2011-07-05 2014-03-05 莱雅公司 包含聚氧亚烷基化脂肪醇醚和直接染料和/或氧化染料的富含脂肪物质的化妆品组合物、染色方法和装置
FR2977482B1 (fr) 2011-07-05 2013-11-08 Oreal Composition de coloration mettant en oeuvre un ether a longue chaine d'un alcool gras alcoxyle et un polymere cationique, procedes et dispositifs
FR2980695B1 (fr) 2011-09-30 2015-04-10 Oreal Composition de coloration mousse comprenant un polycondensat d'oxyde d'ethylene et d'oxyde de propylene
CN103781459A (zh) 2011-09-30 2014-05-07 莱雅公司 包含至少一种特定的氧乙烯化非离子表面活性剂的泡沫染料组合物
FR2983856B1 (fr) 2011-12-13 2014-05-16 Oreal Colorants directs azomethiniques tri-aromatiques, composition tinctoriale comprenant au moins un tel colorant, procede de mise en œuvre et utilisation
FR2984323B1 (fr) 2011-12-16 2019-08-30 L'oreal Coupleur de structure 7 amino-1,2,3,4-tetrahydroquinoleines, composition tinctoriale en comprenant, procedes et utilisations
FR2984324B1 (fr) 2011-12-16 2014-02-21 Oreal Tetrahydropyrazolopyridines cationiques, composition tinctoriale comprenant de telles bases d'oxydation, procede de mise en oeuvre et utilisation
FR2984318B1 (fr) 2011-12-16 2014-06-27 Oreal Coupleur de structure 7 amino-1,2,3,4-tetrahydroquinoleines cationiques, composition tinctoriale en comprenant, procedes et utilisations
FR2984738B1 (fr) 2011-12-21 2013-12-20 Oreal Composition oxydante pour le traitement des fibres keratiniques comprenant un sel mineral d' acide phosphorique, et procedes
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

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US5847863A (en) * 1996-04-25 1998-12-08 Imra America, Inc. Hybrid short-pulse amplifiers with phase-mismatch compensated pulse stretchers and compressors
US6885683B1 (en) * 2000-05-23 2005-04-26 Imra America, Inc. Modular, high energy, widely-tunable ultrafast fiber source
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
US7224518B2 (en) * 2003-02-25 2007-05-29 Toptica Photonics Ag Fiber-optic amplification of light pulses

Also Published As

Publication number Publication date
JPWO2007023801A1 (ja) 2009-03-26
WO2007023801A1 (ja) 2007-03-01
EP1925956A1 (en) 2008-05-28
JP5163124B2 (ja) 2013-03-13
EP1925956B1 (en) 2014-12-03
EP1925956A4 (en) 2012-03-14
RU2008110935A (ru) 2009-09-27
RU2413258C2 (ru) 2011-02-27

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