JP2006184534A - 光ファイバ - Google Patents
光ファイバ Download PDFInfo
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- JP2006184534A JP2006184534A JP2004377800A JP2004377800A JP2006184534A JP 2006184534 A JP2006184534 A JP 2006184534A JP 2004377800 A JP2004377800 A JP 2004377800A JP 2004377800 A JP2004377800 A JP 2004377800A JP 2006184534 A JP2006184534 A JP 2006184534A
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- JP
- Japan
- Prior art keywords
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- optical
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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
- G02B6/028—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
- G02B6/036—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
- G02B6/02004—Optical fibres with cladding with or without a coating characterised by the core effective area or mode field radius
-
- 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
- G02B6/03605—Highest refractive index not on central axis
- G02B6/03611—Highest index adjacent to central axis region, e.g. annular core, coaxial ring, centreline depression affecting waveguiding
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Optical Communication System (AREA)
Abstract
【解決手段】 光ファイバ1は、中心軸を含む光学コア領域10と、この光学コア領域10を囲む光学クラッド領域11とを備える。光学コア領域10は、内側から順に第1領域11,第2領域12および第3領域13からなる。光学領域10の一部である第3領域13が環状の音響コア領域であり、この第3領域に音響波の導波モードを局在させることができる。
【選択図】 図1
Description
図1は、第1実施形態に係る光ファイバ1の説明図である。同図(a)は光ファイバ1の比音響屈折率Δaの径方向分布を示し、同図(b)は光ファイバ1の比屈折率Δの径方向分布を示し、また、同図(c)は光ファイバ1の構造を示す。
好適には、第1領域11,第2領域12,第3領域13および光学クラッド領域14それぞれは、純石英ガラスまたはGeO2が添加された石英ガラスからなる。第1領域11のGeO2濃度をX[1]とし、第2領域12のGeO2濃度をX[2]とし、第3領域13のGeO2濃度をX[3]とし、光学クラッド領域14のGeO2濃度をX[4]としたときに、これらのパラメータの間に下記(20)式の関係がある。
図16は、第2実施形態に係る光ファイバ2の説明図である。同図(a)は光ファイバ2の比音響屈折率Δaの径方向分布を示し、同図(b)は光ファイバ2の比屈折率Δの径方向分布を示し、また、同図(c)は光ファイバ2の構造を示す。
好適には、第1領域21,第2領域22,第3領域23および光学クラッド領域24それぞれは、純石英ガラスまたはF元素が添加された石英ガラスからなる。第1領域21のF元素濃度をY[1]とし、第2領域22のF元素濃度をY[2]とし、第3領域23のF元素濃度をY[3]とし、光学クラッド領域24のF元素濃度をY[4]としたときに、これらのパラメータの間に下記(24)式の関係がある。
Claims (6)
- 中心軸を含む光学コア領域と、この光学コア領域の屈折率より低い屈折率を有し前記光学コア領域を囲む光学クラッド領域と、前記光学コア領域の一部として環状の音響コア領域とを備え、
前記光学コア領域,前記音響コア領域および前記光学クラッド領域それぞれが、前記中心軸の周りに同心状に配置されて、前記中心軸に沿って延び、
前記音響コア領域の縦モード音速が、前記音響コア領域の内側および外側それぞれに隣接する領域の縦モード音速より遅く、
前記音響コア領域に局在して前記中心軸に沿って伝搬する縦モード音響波が存在するように前記音響コア領域の縦モード音速および径方向厚さが設定され、
ブリルアンゲインスペクトルの3dB幅が60MHz以上である、
ことを特徴とする光ファイバ。 - 前記第1領域および前記第3領域それぞれの縦モード音速が互いに異なり、
前記第1領域に局在した音響波モードと前記第3領域に局在した音響波モードとが存在し、それぞれの音響波モードの間の周波数差が50MHz以上である、
ことを特徴とする請求項3記載の光ファイバ。 - 波長1310nmにおけるモードフィールド径が8〜10μmの範囲にあり、ケーブルカットオフ波長が1260nm以下であり、ゼロ分散波長が1300nm〜1324nmの範囲にあり、波長1550nmにおける直径32mm曲げによる曲げ損失が4dB/m以下であり、波長1550nmにおける損失が0.25dB/km以下であり、波長1550nmにおけるSBSしきい値の無限長換算値が9dBm以上である、ことを特徴とする請求項3記載の光ファイバ。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004377800A JP4400454B2 (ja) | 2004-12-27 | 2004-12-27 | 光ファイバ |
AU2005246948A AU2005246948A1 (en) | 2004-12-27 | 2005-12-20 | Optical fiber |
CA002531243A CA2531243A1 (en) | 2004-12-27 | 2005-12-21 | Optical fiber |
EP05028377A EP1674901A1 (en) | 2004-12-27 | 2005-12-23 | Optical fiber with reduced stimulated Brillouin scattering |
US11/317,016 US7440665B2 (en) | 2004-12-27 | 2005-12-27 | Optical fiber |
CNB200510132896XA CN100523884C (zh) | 2004-12-27 | 2005-12-27 | 光纤 |
KR1020050130895A KR20060074904A (ko) | 2004-12-27 | 2005-12-27 | 광파이버 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004377800A JP4400454B2 (ja) | 2004-12-27 | 2004-12-27 | 光ファイバ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006184534A true JP2006184534A (ja) | 2006-07-13 |
JP4400454B2 JP4400454B2 (ja) | 2010-01-20 |
Family
ID=35810852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004377800A Expired - Fee Related JP4400454B2 (ja) | 2004-12-27 | 2004-12-27 | 光ファイバ |
Country Status (7)
Country | Link |
---|---|
US (1) | US7440665B2 (ja) |
EP (1) | EP1674901A1 (ja) |
JP (1) | JP4400454B2 (ja) |
KR (1) | KR20060074904A (ja) |
CN (1) | CN100523884C (ja) |
AU (1) | AU2005246948A1 (ja) |
CA (1) | CA2531243A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006317658A (ja) * | 2005-05-12 | 2006-11-24 | Furukawa Electric Co Ltd:The | 光ファイバ |
WO2008032779A1 (fr) | 2006-09-14 | 2008-03-20 | Fujikura Ltd. | Fibre optique et matériau à base de fibre optique |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2302428A3 (en) * | 2004-11-05 | 2011-08-03 | Fujikura, Ltd. | Optical fiber with increased Brillouin threshold, transmission system and multiple-wavelength transmission system |
US7228039B2 (en) * | 2005-06-15 | 2007-06-05 | Corning Incorporated | High SBS threshold optical fiber with fluorine dopant |
FR2893149B1 (fr) * | 2005-11-10 | 2008-01-11 | Draka Comteq France | Fibre optique monomode. |
FR2899693B1 (fr) | 2006-04-10 | 2008-08-22 | Draka Comteq France | Fibre optique monomode. |
CN101389989B (zh) * | 2006-06-30 | 2010-08-18 | 古河电气工业株式会社 | 光纤 |
US7463807B2 (en) * | 2006-07-06 | 2008-12-09 | Peter Dragic | Waveguide configuration |
US8965162B2 (en) * | 2006-09-27 | 2015-02-24 | Peter Dragic | Anti-guiding waveguides |
US7840110B1 (en) * | 2006-09-27 | 2010-11-23 | Peter Danny Dragic | Optical waveguide |
DK1930753T3 (en) | 2006-12-04 | 2015-03-30 | Draka Comteq Bv | Optical fiber having a high Brillouin threshold strength and low bending |
WO2009047782A2 (en) * | 2007-06-05 | 2009-04-16 | Sterlite Technologies Ltd | Optical fiber having high sbs threshold as well as minimized marcobending loss |
ES2480190T3 (es) | 2007-11-09 | 2014-07-25 | Draka Comteq B.V. | Fibra óptica resistente a microcurvatura |
FR2930997B1 (fr) | 2008-05-06 | 2010-08-13 | Draka Comteq France Sa | Fibre optique monomode |
US7974319B2 (en) | 2008-11-21 | 2011-07-05 | Institut National D'optique | Spectrally tailored pulsed fiber laser oscillator |
WO2010085605A1 (en) | 2009-01-23 | 2010-07-29 | Nufern | Optical fiber with suppressed stimulated brillouin scattering |
CN104865637B (zh) * | 2015-06-08 | 2017-11-17 | 华中科技大学 | 一种受激布里渊散射效应增强型光纤 |
JP6335949B2 (ja) * | 2016-02-12 | 2018-05-30 | 株式会社フジクラ | マルチコアファイバ |
US10281646B2 (en) | 2016-09-20 | 2019-05-07 | Honeywell International Inc. | Etchless acoustic waveguiding in integrated acousto-optic waveguides |
US10429677B2 (en) * | 2016-09-20 | 2019-10-01 | Honeywell International Inc. | Optical waveguide having a wide brillouin bandwidth |
CN112368615B (zh) | 2018-07-02 | 2023-05-02 | 住友电气工业株式会社 | 光纤 |
CN115498486B (zh) * | 2022-11-18 | 2023-04-07 | 中国航天三江集团有限公司 | 利用磁致伸缩效应提升高功率激光器sbs阈值的方法及系统 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2053212A1 (en) * | 1991-10-11 | 1993-04-11 | Cheng-Kuei Jen | Optical fibers with preset stimulated backward brillouin scattering thresholds |
AU745481B2 (en) * | 1997-07-15 | 2002-03-21 | Corning Incorporated | Suppression of stimulated brillouin scattering in optical fiber |
US6587623B1 (en) * | 2000-08-14 | 2003-07-01 | The Board Of Trustees Of The University Of Illinois | Method for reducing stimulated brillouin scattering in waveguide systems and devices |
US6687440B2 (en) | 2001-02-28 | 2004-02-03 | The Boeing Company | Optical fiber having an elevated threshold for stimulated brillouin scattering |
US7079749B2 (en) * | 2003-01-27 | 2006-07-18 | Peter Dragic | Waveguide configuration |
US6952519B2 (en) * | 2003-05-02 | 2005-10-04 | Corning Incorporated | Large effective area high SBS threshold optical fiber |
-
2004
- 2004-12-27 JP JP2004377800A patent/JP4400454B2/ja not_active Expired - Fee Related
-
2005
- 2005-12-20 AU AU2005246948A patent/AU2005246948A1/en not_active Abandoned
- 2005-12-21 CA CA002531243A patent/CA2531243A1/en not_active Abandoned
- 2005-12-23 EP EP05028377A patent/EP1674901A1/en not_active Withdrawn
- 2005-12-27 KR KR1020050130895A patent/KR20060074904A/ko not_active Application Discontinuation
- 2005-12-27 CN CNB200510132896XA patent/CN100523884C/zh not_active Expired - Fee Related
- 2005-12-27 US US11/317,016 patent/US7440665B2/en not_active Expired - Fee Related
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006317658A (ja) * | 2005-05-12 | 2006-11-24 | Furukawa Electric Co Ltd:The | 光ファイバ |
JP4630124B2 (ja) * | 2005-05-12 | 2011-02-09 | 古河電気工業株式会社 | 光ファイバ |
WO2008032779A1 (fr) | 2006-09-14 | 2008-03-20 | Fujikura Ltd. | Fibre optique et matériau à base de fibre optique |
EP2060938A1 (en) * | 2006-09-14 | 2009-05-20 | Fujikura, Ltd. | Optical fiber and optical fiber base material |
JPWO2008032779A1 (ja) * | 2006-09-14 | 2010-01-28 | 株式会社フジクラ | 光ファイバ及び光ファイバ母材 |
US7835609B2 (en) | 2006-09-14 | 2010-11-16 | Fujikura Ltd. | Optical fiber and optical fiber preform |
JP4677491B2 (ja) * | 2006-09-14 | 2011-04-27 | 株式会社フジクラ | 光ファイバ及び光ファイバ母材 |
EP2060938A4 (en) * | 2006-09-14 | 2013-08-07 | Fujikura Ltd | OPTICAL FIBER AND BASIC MATERIAL OF AN OPTICAL FIBER |
Also Published As
Publication number | Publication date |
---|---|
AU2005246948A1 (en) | 2006-07-13 |
CA2531243A1 (en) | 2006-06-27 |
US7440665B2 (en) | 2008-10-21 |
EP1674901A1 (en) | 2006-06-28 |
CN1797048A (zh) | 2006-07-05 |
US20060171648A1 (en) | 2006-08-03 |
JP4400454B2 (ja) | 2010-01-20 |
CN100523884C (zh) | 2009-08-05 |
KR20060074904A (ko) | 2006-07-03 |
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