TW401520B - Dispersion shift optical fiber - Google Patents

Dispersion shift optical fiber Download PDF

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Publication number
TW401520B
TW401520B TW087116363A TW87116363A TW401520B TW 401520 B TW401520 B TW 401520B TW 087116363 A TW087116363 A TW 087116363A TW 87116363 A TW87116363 A TW 87116363A TW 401520 B TW401520 B TW 401520B
Authority
TW
Taiwan
Prior art keywords
optical fiber
dispersion shift
light
radial position
light intensity
Prior art date
Application number
TW087116363A
Other languages
English (en)
Inventor
Hideyori Sasaoka
Takatoshii Katoh
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.)
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Publication date
Application filed by Sumitomo Electric Industries filed Critical Sumitomo Electric Industries
Application granted granted Critical
Publication of TW401520B publication Critical patent/TW401520B/zh

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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
    • G02B6/02004—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
    • 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
    • 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
    • G02B6/02276—Dispersion shifted fibres, i.e. zero dispersion at 1550 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
    • G02B6/036—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
    • 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
    • G02B6/036—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
    • G02B6/03633—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 - -

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
  • Optical Couplings Of Light Guides (AREA)

Description

401520 Λ7 Η 7 五、發明説明（5 第1圃的本實胞例分散移位型光纖之光強度分佈P(「）， 在其各個的周邊斜坡部分之分佈情形放大表示者。在本 筲施例的分散移位型光雄中，在於上述第2直徑方向位 置的光強度P5已成為SPmax/l〇〇,而相對的，在於Μ 注的分散移位型光纖之相同位置（與上述第2直徑方向 位置相同之位置）的光強度P’s畲成為比其最大光強度 P · max的1 〇 〇分之1為大。 又，為了評價由大彆曲引起的光損失，在直徑201111*^ 圓筒型捲筒上，分別捲嬈Μ往的光纖和本實施例的分散 移位型光纖，使1.55_^波紋的光線入射之结果，本實施例 的分歡移位型光纖在捲缤前後之光損失增加量為〇.〗dB/m ，而以注的光纖光損失量2. OdB/n,由此可確認本實施 例的分散移位型光缴已佔優勢。 經漪部中央標卑局只工消费合作社印¾ (請先閱讀背而之注意事項再e ) 又，為了評價由大彎曲引起的光損失，在表面敷設砂 布的直徑280^捲筒上，捲繞Μ往的和本實施例的分散 移位型光纖，Κ測定其在捲缤前後的各個光損失之增加 最。其结果是本實胞例的分散移位型光纖之光損失增加 量為0.028dB /kg,而以往的光潘之光損失增加量為1.12 dB/kin,很明顯的可確認本實施例之分散移位型光纖已 佔優勢。 如此，將折射率分佈構成為可使在於離開核心區域的 中心位置之第1直徑方向位置成為最大的光強度Pmax， 而在離開該第1直徑方向位置的相當於信號光波長入5 倍距離（5λ)之第2直徑方向位置，使光強度！5^成為 -7 一 本紙張尺度適用中國國家標準（CNS )八4規枋（210Χ 29*7公烚） 401520 A7 B7 五、發明説明（7 ) —— ~ 此分散移位型光纖的光強度分佈是在離開核心區域中 心位置（r = 0)之第1直徑方向位置成為最大光強度P ,而再往外圍方向就急璉的減少，在離開第1直徑方向 位置只有信號光波長λ的5倍距離（5λ)之第2直徑方 向位置，其光強度就會成為最大光強度Pmax的1〇〇分 之1 Μ下。又，有效核心斷面積A eff會成為70^2以上。 如此，將折射率分佈構成為可使在於離開核心區域的 中心位置之第1直徑方向位置成為最大的光強度P max ， 而在離開該第1直徑方向位置的相當於信號光波長λ的 5倍距離（5λ)之第2直徑方向位置，使光強度成為 最大光強度Pxnax的分之1以下，如此，不必將光強 度分佈P(「）的周逄斜坡極端的擴大，也可加大有效核心 斷面積A eff。其结果是可充分封閉光線，而可減低大彎 曲或微彎曲所引起之光損失。 又，由於使有效核心斷面積A eff為7〇£^2M上，因而， 可減低自調相、互調相、4頻率混合等之之非線性現象 ，而可抑低信號光失真之出現。 (第3實胞形.態） 第4圖是實施例3的分散移位型光纖之構造與折射率 分佈及光強度分佈圖。 此分散移位型光纖和實施例1同樣，係具可傳输1.55 ZiB波段的信號光之核心區域和包層區域。由包層區域 所包圍的核心區域是由•·存在於該核心區域中央部分之 第一層Ci ;鄰接於第一層Ci的外圍惻之環狀第二層（：2 -9- 本纸張尺度適用中國國家標準（CNS ) Λ4規枋（210X29?公棼） (請先閱讀背而之注意事項再填，， 、τ i · Μ 經消部中央標準局貝工消费合作社印^ 401520 A8 B8 C8 D8 •一 ·一.· ηρ J对命/日，暴 M^r 六 # 明 本
後 是 否 變 Η η /.Μ >ν 申請專利範圍 第87 1 1 63 63號「分散移位型光纖」專利案 (90年5,月31日修正） 六申請專利範圍： 1 . 一種分散移位型光纖，係其核心區域的折射率分佈 是構成爲可對中心波長在約1 500〜I 600nm範圍內 的光線賦與分散移位之分散移位型光纖中，其特徵 爲I J 該折射率分佈係構成爲；使有效核心斷面積爲7 〇 μ m2以上，使基準模態中的光強度爲最大之第1直 徑方向位置偏離於核心區域的中心位置；並在從上 述第1直徑方向位置相當於上述波長的5倍距離 於外圍側第2直徑方向位置，使光強度成爲上述 光強度的最大値之100分之1以下者。 n etmm. n n n ϋ n n n 1%. * n ·1- 1 n n n n^δ,’ t n n n n I— n 1 I f (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製
TW087116363A 1997-10-02 1998-10-01 Dispersion shift optical fiber TW401520B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26991097 1997-10-02

Publications (1)

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TW401520B true TW401520B (en) 2000-08-11

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Country Status (5)

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US (1) US6229946B1 (zh)
EP (1) EP1020741A4 (zh)
AU (1) AU9187198A (zh)
TW (1) TW401520B (zh)
WO (1) WO1999018461A1 (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999022258A1 (fr) * 1997-10-29 1999-05-06 Sumitomo Electric Industries, Ltd. Fibre optique a dephasage dispersif
CN100353192C (zh) * 1999-07-12 2007-12-05 株式会社藤仓 色散位移光纤
JP2003232950A (ja) 2002-02-13 2003-08-22 Fujikura Ltd 光ファイバ
JP3910486B2 (ja) * 2002-05-17 2007-04-25 株式会社フジクラ 光ファイバ及び光伝送路
US7158705B2 (en) * 2004-08-30 2007-01-02 Corning Incorporated Optical fiber with birefringence and large mode field diameter
US7272289B2 (en) * 2005-09-30 2007-09-18 Corning Incorporated Low bend loss optical fiber
US7356232B1 (en) * 2006-08-01 2008-04-08 Furukawa Electric North America Optical fibers for high power applications
CN106707408A (zh) * 2017-03-28 2017-05-24 中山大学 一种基于环形结构纤芯的折射率渐变型光纤

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JP2668677B2 (ja) * 1986-06-18 1997-10-27 株式会社フジクラ 分散シフト光フアイバ
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US5835655A (en) * 1995-01-26 1998-11-10 Corning Incorporated Large effective area waveguide fiber
FR2736440B1 (fr) * 1995-07-07 1997-08-01 Alcatel Submarcom Guide optique monomode a dispersion decalee et grande surface effective de mode
JP3497298B2 (ja) * 1995-10-23 2004-02-16 株式会社フジクラ 光ファイバフィルタ
JPH1082918A (ja) * 1996-09-09 1998-03-31 Sumitomo Electric Ind Ltd 光ファイバグレーティング
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CA2229280A1 (en) * 1997-02-12 1998-08-12 Sumitomo Electric Industries, Ltd. Dispersion-shifted fiber
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US6005997A (en) * 1997-12-31 1999-12-21 Mci Communications Corporation Long-haul terrestrial optical fiber link having low-power optical line amplifiers with integrated dispersion compensation modules

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WO1999018461A1 (fr) 1999-04-15
AU9187198A (en) 1999-04-27
US6229946B1 (en) 2001-05-08
EP1020741A4 (en) 2005-12-21
EP1020741A1 (en) 2000-07-19

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