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1. WO2004007383 - OPTICAL FIBER AND A METHOD FOR MANUFACTUIRNG SAME

Publication Number WO/2004/007383
Publication Date 22.01.2004
International Application No. PCT/JP2003/008788
International Filing Date 10.07.2003
IPC
C03B 37/027 2006.01
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
37Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
01Manufacture of glass fibres or filaments
02by drawing or extruding
025from reheated softened tubes, rods, fibres or filaments
027Fibres composed of different sorts of glass, e.g. fibre optics
C03C 13/04 2006.01
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
13Fibre or filament compositions
04Fibre optics, e.g. core and clad fibre compositions
G02B 6/02 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
02Optical fibre with cladding
G02B 6/036 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
02Optical fibre with cladding
036core or cladding comprising multiple layers
CPC
C03B 2201/31
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
2201Type of glass produced
06Doped silica-based glasses
30doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
31doped with germanium
C03B 2203/22
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
2203Fibre product details, e.g. structure, shape
10Internal structure or shape details
22Radial profile of refractive index, composition or softening point
C03B 2203/23
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
2203Fibre product details, e.g. structure, shape
10Internal structure or shape details
22Radial profile of refractive index, composition or softening point
23Double or multiple optical cladding profiles
C03B 2203/36
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
2203Fibre product details, e.g. structure, shape
36Dispersion modified fibres, e.g. wavelength or polarisation shifted, flattened or compensating fibres (DSF, DFF, DCF)
C03B 2205/55
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
2205Fibre drawing or extruding details
55Cooling or annealing the drawn fibre prior to coating using a series of coolers or heaters
C03B 2205/56
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
2205Fibre drawing or extruding details
56Annealing or re-heating the drawn fibre prior to coating
Applicants
  • SUMITOMO ELECTRIC INDUSTRIES, LTD. [JP]/[JP] (AllExceptUS)
  • NAGAYAMA, Katsuya [JP]/[JP] (UsOnly)
  • MORITA, Keisei [JP]/[JP] (UsOnly)
Inventors
  • NAGAYAMA, Katsuya
  • MORITA, Keisei
Agents
  • HASEGAWA, Yoshiki
Priority Data
2002-20179510.07.2002JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) OPTICAL FIBER AND A METHOD FOR MANUFACTUIRNG SAME
(FR) FIBRE OPTIQUE ET SON PROCEDE DE FABRICATION
(JA) 光ファイバ及びその製造方法
Abstract
(EN)
An optical fiber matrix (2) is prepared by adding Ge into a core region in an amount which satisfies the condition of [Ge] ≥ 0.3 %, wherein [Ge] is the relative refractive index difference expressed in a percentage % relative to pure SiO2, and formed into an optical fiber (3) by conducting hot wire drawing in a wire drawing furnace (11). In a heat treatment furnace (21) at the succeeding stage of the wire drawing furnace (11), the optical fiber (3) is annealed at a cooling rate of 2000 °C/second or less under the condition that the annealing time is not shorter than the relaxation time. Then the annealed optical fiber (3) is introduced into a cooling means (31) at an introduction temperature not less than 700 °C, and forcedly cooled by the cooling means (31). Consequently, there can be obtained an optical fiber having a reduced Rayleigh scattering loss and a good hydrogen resistant property with a high productivity. A method for manufacturing such an optical fiber is also disclosed.
(FR)
On prépare une matrice de fibre optique (2) par l'ajout de Ge dans une région de d'âme en une quantité qui satisfait la condition [Ge] $m(G) 0,3 %, dans laquelle [Ge] est la différence d'indice de réfraction relative exprimée en un pourcentage par rapport à du SiO2 pur, et on la forme en une fibre optique (3) en effectuant le tréfilage à chaud dans un four de tréfilage (11). Dans un four de traitement thermique (21) qui constitue l'étage faisant suite au four de tréfilage (11), on effectue un recuit de la fibre optique (3) à un taux de refroidissement égal ou inférieur à 2000 °C/seconde à condition que le temps de recuit ne soit pas inférieur au temps de relaxation. Ensuite on introduit la fibre optique recuite (3) dans un moyen de refroidissement (31) à une température d'insertion égale ou supérieure à 700 °C, et on effectue un refroidissement forcé par le moyen de refroidissement (31). Ainsi, on peut obtenir une fibre optique présentant une perte de diffusion de Rayleigh réduite et une propriété de bonne résistance à l'hydrogène avec une productivité élevée. L'invention a également trait à un procédé de fabrication d'une telle fibre optique.
(JA)
コア領域に純SiO2に対する%で表した比屈折率差[Ge]が条件[Ge]≧0.3%を満たす添加量でGeが添加された光ファイバ母材2を準備し、線引炉11で加熱線引して光ファイバ3とした後、線引炉11の後段の熱処理炉21において、冷却速度が2000℃/秒以下、アニール時間が緩和時間以上となる条件で光ファイバ3をアニールする。さらに、アニールされた光ファイバ3を、冷却手段31へと700℃以上の入線温度で入線し、冷却手段31によって光ファイバ3を強制冷却する。これにより、レイリー散乱損失が低減され、かつ、良好な耐水素特性を有する光ファイバを生産性良く製造することが可能な光ファイバ、及びその製造方法が実現される。
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