JP4163656B2 - 特大有効コア断面積(sla)光ファイバ、およびそれを組み込んだ通信システム - Google Patents
特大有効コア断面積(sla)光ファイバ、およびそれを組み込んだ通信システム Download PDFInfo
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- JP4163656B2 JP4163656B2 JP2004141746A JP2004141746A JP4163656B2 JP 4163656 B2 JP4163656 B2 JP 4163656B2 JP 2004141746 A JP2004141746 A JP 2004141746A JP 2004141746 A JP2004141746 A JP 2004141746A JP 4163656 B2 JP4163656 B2 JP 4163656B2
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- 239000013307 optical fiber Substances 0.000 title claims description 46
- 239000000835 fiber Substances 0.000 claims description 84
- 238000005253 cladding Methods 0.000 claims description 39
- 239000006185 dispersion Substances 0.000 claims description 27
- 230000003287 optical effect Effects 0.000 claims description 11
- 230000007423 decrease Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 37
- 238000005452 bending Methods 0.000 description 16
- 230000009022 nonlinear effect Effects 0.000 description 6
- 239000003365 glass fiber Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 230000009021 linear effect Effects 0.000 description 3
- 229910005793 GeO 2 Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical group [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- RGNPBRKPHBKNKX-UHFFFAOYSA-N hexaflumuron Chemical compound C1=C(Cl)C(OC(F)(F)C(F)F)=C(Cl)C=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F RGNPBRKPHBKNKX-UHFFFAOYSA-N 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
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- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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- 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
- G02B6/03661—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 4 layers only
- G02B6/03666—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 4 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
- G02B6/02004—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
- G02B6/0281—Graded index region forming part of the central core segment, e.g. alpha profile, triangular, trapezoidal core
-
- 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
- G02B6/03638—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
- G02B6/0365—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
- 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
- G02B6/02266—Positive dispersion fibres 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
- G02B6/02214—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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Description
0≦a1≦2.65、7.1≦a1+a2≦10、および3≦a3≦25であって、ここで全ての値はマイクロメータ(μm)の単位である。好ましくは、
0.25%≦nmax≦0.42%である。
Aeff(1310nm)≧80μm2;
2)ケーブル・カット・オフ波長≦1310nm;
3)マクロ・ベンディングロス:直径20mmマンドレルの場合で10dB/mより小さい;
4)減衰損失:1550nmで0.19dB/kmより小さい;
1310nmで0.35dB/kmより小さい;
5)分散(D):1550nmにおいてD〜20ps/km/nm;
6)分散と分散スロープの比(RDS):1550nmにおいて
RDS〜0.0031nm−1
1)有効コア断面積Aeff(1550nm)≒113.9μm2;
Aeff(1310nm)≒100.3μm2;
2)ケーブル・カット・オフ波長≦1300nm;
3)マクロ・ベンディングロス:直径20mmマンドレルの場合で10dB/mより小さい;
4)D(1550nm):20.55ps/km/nm;
5)分散スロープ(S)(1550nm):0.064ps/km/nm2
6)減衰損失:1550nmで0.19dB/kmより小さい;
1310nmで0.35dB/kmより小さい;
1)有効コア断面積Aeff(1550nm)≒107.3μm2;
Aeff(1310nm)≒93.7μm2;
2)ケーブル・カット・オフ波長≦1300nm;
3)マクロ・ベンティングロス:直径20mmマンドレルの場合で10dB/mより小さい;
4)D(1550nm):20.49ps/km/nm;
5)S(1550nm):0.064ps/km/nm2
6)減衰損失:1550nmで0.19dB/kmより小さい;
1310nmで0.35dB/kmより小さい;
1)有効コア断面積Aeff(1550nm)≒122.9μm2;
Aeff(1310nm)≒102.1μm2;
2)ケーブル・カット・オフ波長≦1320nm;
3)マクロ・ベンディングロス:直径20mmマンドレルの場合で10dB/mより小さい;
4)D(1550nm):19.60ps/km/nm;
5)S(1550nm):0.063ps/km/nm2
6)減衰損失:1550nmで0.19dB/kmより小さい;
1310nmで0.35dB/kmより小さい;
1)有効コア断面積Aeff(1550nm)≒131.2μm2;
Aeff(1310nm)≒112.4μm2;
2)ケーブル・カット・オフ波長≦1340nm;
3)マクロ・ベンディングロス:直径20mmマンドレルの場合で10dB/mより小さい;
4)D(1550nm):20.08ps/km/nm;
5)S(1550nm):0.064ps/km/nm2
6)減衰損失:1550nmで0.19dB/kmより小さい;
1310nmで0.35dB/kmより小さい;
1)有効コア断面積Aeff(1550nm)≒106.4μm2;
Aeff(1310nm)≒92.5μm2;
2)ケーブル・カット・オフ波長≦1300nm;
3)マクロ・ベンディングロス:直径20mmマンドレルの場合で10dB/mより小さい;
4)D(1550nm):20.64ps/km/nm;
5)S(1550nm):0.063ps/km/nm2
6)減衰損失:1550nmで0.19dB/kmより小さい;
1310nmで0.35dB/kmより小さい;
11 コア領域
12A 第1のコア領域
12B 第2のコア領域
13 第1の環状領域
14 外側クラッド
21 最大比屈折率
22 比屈折率の増加線
23 比屈折率の減少線
24 溝領域
25 外側クラッド部
53 コアの中心軸上にある最大比屈折率
63 コアの中心軸上からずれた最大比屈折率
74 溝領域
77 第2領域
81 分割されないコア領域
82 第1溝領域
83 第2溝領域
Claims (8)
- 少なくとも1つの光エネルギー発生源と、
おおよそ1550nmの波長において正の分散とおおよそ1550nmの波長において正の分散スロープとを有する光ファイバ(10)を含む光ファイバケーブルとを含み、前記光ファイバ(10)は、1550nmの波長において0.19db/kmよりも小さい減衰損失と、1310nmの波長において0.35db/kmよりも小さい減衰損失とを有し、前記光ファイバケーブルが前記少なくとも1つの光エネルギー発生源と結合され、前記光ファイバ(10)がコア領域(11)と前記コア領域を取り囲むクラッド領域(14)とを有し、前記光ファイバ(10)はさらに、前記コア領域(11)と前記クラッド領域(14)との間に溝領域(13)を有し、前記溝領域(13)は負の比屈折率n 2 を有し、前記光ファイバは、おおよそ1310nmの波長においておおよそ80μm2に等しいか、あるいはそれより大きい有効コア断面積Aeffを有し、かつ、おおよそ1310nmよりも小さいか、あるいは等しいケーブル・カット・オフ波長を有し、前記コア領域(11)が少なくとも第1(12A)と第2の屈折率部分(12B)とに分割され、前記第1と第2の屈折率部分(12A、12B)はそれぞれ互いに異なる正の第1および第2の比屈折率n1aおよびn1bを有し、そして、前記第1の屈折率部分の比屈折率は前記コア領域の半径の関数として増加し、前記第2の屈折率部分の比屈折率は前記コア領域の半径の関数として減少することを特徴とする光ファイバ通信システム。 - 前記光ファイバ(10)は、おおよそ1550nmの波長においておおよそ95μm2に等しいか、あるいはそれより大きい有効コア断面積Aeffを有することを特徴とする請求項1に記載の光ファイバ通信システム。
- 前記第1と第2の屈折率部分(12Aおよび12B)を有する前記コア領域(11)は、
(rはミクロンで表わした半径方向の位置であり、nmaxはコア領域の最大比屈折率であり、a1はコア領域の第1の部分の半径であり、a2はコア領域(11)の第2の部分の厚みであり、n1aは分割されたコア領域(11)の第1の部分(12A)の比屈折率であり、n1bは分割されたコア領域(11)の第2の部分(12B)の比屈折率であり、a1+a2はコア領域の半径rであり、a3は溝領域の幅であり、a1+a2+a3はクラッド領域の始点に接する溝領域(13)の外側端までの半径)で定義される比屈折率プロファイルを有することを特徴とする請求項1に記載の光ファイバ通信システム。 - α1≧1がコア領域(11)の屈折率プロファイルの形を記述する指数部であることを特長とする請求項3に記載の光ファイバ通信システム。
- 0<a1≦2.65、7.1≦a1+a2≦10、および3≦a3≦25(a1、a2、およびa3の単位がマイクロメータ(μm))であることを特長とする請求項3に記載の光ファイバ通信システム。
- 特大有効コア断面積(SLA)光ファイバ(10)であって、前記SLAファイバ(10)は、おおよそ1550nmの波長において正の分散とおおよそ1550nmの波長において正の分散スロープとを有し、前記光ファイバ(10)は、1550nmの波長において0.19db/kmよりも小さい減衰損失と、1310nmの波長において0.35db/kmよりも小さい減衰損失とを有し、前記光ファイバ(10)は、おおよそ1310nmの波長においておおよそ80μm2に等しいか、あるいはそれより大きい有効コア断面積Aeffを有し、そしておおよそ1310nmよりも小さいか、あるいは等しいケーブル・カット・オフ波長を有し、前記光ファイバ(10)は、コア領域(11)と前記コア領域(11)を取り囲むクラッド領域(14)とを有し、前記光ファイバ(10)はさらに、前記コア領域(11)と前記クラッド領域(14)との間に溝領域(13)を有し、前記溝領域(13)は負の比屈折率n 2 を有し、前記コア領域(11)が少なくとも第1と第2の屈折率部分(12A、12B)とに分割され、前記第1と第2の屈折率部分(12A、12B)はそれぞれ互いに異なる正の第1と第2の比屈折率n1aおよびn1bを有し、そして、前記第1の屈折率部分の比屈折率は前記コア領域の半径の関数として増加し、前記第2の屈折率部分の比屈折率は前記コア領域の半径の関数として減少することを特徴とする特大有効コア断面積(SLA)光ファイバ(10)。
- 前記光ファイバ(10)は、おおよそ1550nmの波長においておおよそ95μm2に等しいか、あるいはそれより大きい有効コア断面積Aeffを有することを特徴とする請求項6に記載の光ファイバ(10)。
- 前記第1と第2の屈折率部分(12Aおよび12B)を有する前記コア領域(11)は、
(rはミクロンで表わした半径方向の位置であり、nmaxはコア領域(11)の最大比屈折率であり、a1はコア領域(11)の第1の部分の半径であり、a2はコア領域の第2の部分(12B)の厚みであり、n1aは分割されたコア領域(11)の第1の部分(12A)の比屈折率であり、n1bは分割されたコア領域(11)の第2の部分(12B)の比屈折率であり、a1+a2はコア領域(11)の半径rであり、a3は溝領域(13)の幅であり、a1+a2+a3はクラッド領域(14)の始点に接する溝領域(13)の外側端までの半径)で定義される比屈折率プロファイルを有することを特徴とする請求項6に記載の光ファイバ(10)。
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US10/435,855 US6904218B2 (en) | 2003-05-12 | 2003-05-12 | Super-large-effective-area (SLA) optical fiber and communication system incorporating the same |
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JP2004341525A JP2004341525A (ja) | 2004-12-02 |
JP4163656B2 true JP4163656B2 (ja) | 2008-10-08 |
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US (1) | US6904218B2 (ja) |
EP (1) | EP1477831B1 (ja) |
JP (1) | JP4163656B2 (ja) |
CN (1) | CN1278150C (ja) |
DE (1) | DE602004000279T2 (ja) |
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NL1024015C2 (nl) | 2003-07-28 | 2005-02-01 | Draka Fibre Technology Bv | Multimode optische vezel voorzien van een brekingsindexprofiel, optisch communicatiesysteem onder toepassing daarvan en werkwijze ter vervaardiging van een dergelijke vezel. |
US7187833B2 (en) * | 2004-04-29 | 2007-03-06 | Corning Incorporated | Low attenuation large effective area optical fiber |
WO2006010798A1 (en) * | 2004-07-26 | 2006-02-02 | Photonium Oy | Multimode optical fiber with low differential mode delay |
KR100890976B1 (ko) * | 2004-08-30 | 2009-03-27 | 가부시키가이샤후지쿠라 | 싱글 모드 광파이버 |
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. |
WO2008001937A1 (fr) * | 2006-06-30 | 2008-01-03 | The Furukawa Electric Co., Ltd. | Fibre optique |
EP1930753B1 (en) * | 2006-12-04 | 2015-02-18 | Draka Comteq B.V. | Optical fiber with high Brillouin threshold power and low bending losses |
US7787731B2 (en) * | 2007-01-08 | 2010-08-31 | Corning Incorporated | Bend resistant multimode optical fiber |
EP1959292A3 (en) * | 2007-02-13 | 2009-06-17 | Olympus Corporation | Laser microscope |
FR2914751B1 (fr) | 2007-04-06 | 2009-07-03 | Draka Comteq France | Fibre optique monomode |
WO2008136918A2 (en) * | 2007-05-07 | 2008-11-13 | Corning Incorporated | Large effective area fiber |
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DE602004000279T2 (de) | 2006-07-20 |
CN1278150C (zh) | 2006-10-04 |
CN1550802A (zh) | 2004-12-01 |
US20040228593A1 (en) | 2004-11-18 |
EP1477831A1 (en) | 2004-11-17 |
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