CN1328603C - 一种生产光纤预制品的方法 - Google Patents

一种生产光纤预制品的方法 Download PDF

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CN1328603C
CN1328603C CNB2003101188984A CN200310118898A CN1328603C CN 1328603 C CN1328603 C CN 1328603C CN B2003101188984 A CNB2003101188984 A CN B2003101188984A CN 200310118898 A CN200310118898 A CN 200310118898A CN 1328603 C CN1328603 C CN 1328603C
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optical fiber
layer
prefabrication
technology
annulus
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CN1504783A (zh
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雅克·若利
伊莎贝尔·德科
玛丽－皮埃尔·格莱莫
纳塔莉·奥弗雷
让－弗洛朗·康皮翁
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Alcatel Lucent NV
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Alcatel NV
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
    • C03B37/01807—Reactant delivery systems, e.g. reactant deposition burners
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/20—Doped silica-based glasses doped with non-metals other than boron or fluorine
    • C03B2201/28—Doped silica-based glasses doped with non-metals other than boron or fluorine doped with phosphorus
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/10—Internal structure or shape details
    • C03B2203/22—Radial profile of refractive index, composition or softening point
    • C03B2203/23—Double or multiple optical cladding profiles
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/36—Dispersion modified fibres, e.g. wavelength or polarisation shifted, flattened or compensating fibres (DSF, DFF, DCF)
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Glass Compositions (AREA)

Abstract

本发明公开了一种生产光纤预制品的方法，通过沉积层来生产色散位移光纤或色散补偿光纤预制品的FCVD工艺，其中该光纤具有由中心部分、内包层、环形区构成的芯和外包层，预制品与光纤的内包层和环形区对应的层中具有含量不超过0.1wt%的磷。

Description

一种生产光纤预制品的方法
本申请基于2002年12月5日提出的法国专利申请第0215332号，该法国申请所公开的内容在此作为参考，并要求其优先权。
技术领域
本发明领域是利用化学气相沉积(CVD)工艺通过沉积层来生产光纤预制品的方法的领域。CVD工艺包括使用焰炬(torch)的改进化学气相沉积(MCVD)工艺和使用感应炉或电阻炉的炉(furnace)化学气相沉积(FCVD)工艺。
背景技术
所有上述工艺的一个问题是提高它们的生产率的问题。在CVD工艺中，光纤预制品的折射率分布(index profile)是通过在玻璃管内侧连续沉积玻璃的同心层得到的。沉积层越厚，循环时间越短，生产率越高。
使用高含量的磷降低玻璃的粘度以促进玻璃化步骤、可以沉积厚层从而获得高生产率的MCVD工艺在本技术领域中为人们所熟知。当生产具有复杂的色散位移光纤(DSF)型折射率分布的光纤预制品，尤其包括非零色散位移光纤(NZ-DSF)预制品和色散补偿光纤(DCF)预制品(其芯包含至少三个片层即中心部分、内包层、环形区，向其芯增加外包层)时，预制品与内包层和环形区对应的层中磷的含量为0.2wt％到0.4wt％。具有相对高折射率(index)的芯的中心部分不含有磷并且是从较薄的层制得的。
通过沉积厚层获得高生产率的FCVD工艺也是本技术领域中为人们所熟知的，例如从法国专利申请第2742743号可知炉加热优于焰炬，但是它没有任何关于使用磷来改善玻璃化的说明，也未提到具有复杂折射率分布的光纤预制品的特殊问题。
具有复杂折射率分布的光纤预制品的情况，磷有产生不精确的(imprecise)折射率分布的缺点，导致不能很好地控制光纤几何参数，特别是如果折射率分布是复杂的，该问题尤其会影响色散斜率，这是色散位移光纤和色散补偿光纤中的大问题。不精确的折射率分布在每一沉积层和下一层之间有特殊的“波”。上述第一个现有技术有使用过高含量的磷的缺点，从而得到具有不精确折射率分布的光纤预制品。上述第二个现有技术没有专注于具有复杂折射率分布的光纤预制品的特殊问题而且没有磷含量的说明。
为提高生产率同时制得精确的折射率分布，在生产具有复杂的DSF或DCF型(含至少一层内包层和一层环形区)折射率分布的光纤预制品的背景下，本发明提出将使用炉作为加热装置(即FCVD工艺)和至少在预制品与光纤的内包层和环形区对应的层中使用小于等于0.1wt％含量的磷作为促进玻璃化的熔剂二者联合起来。正是由于使用了FCVD工艺，在加热预制品时炉比焰炬更有效率，使得磷含量降低同时保持恰当的玻璃化以保持适当的生产率。如果是焰炬，将必须保持高含量的磷以在厚层的沉积过程中保持恰当的玻璃化；如果是焰炬，在没有磷存在的情况下，只能沉积薄层，这对生产率是不利的。
发明内容
根据该发明，提供了一种通过沉积层来生产色散位移光纤或色散补偿光纤预制品的CVD工艺，该光纤具有由中心部分、内包层、环形区构成的芯和外包层，在该方法中预制品与光纤的内包层和环形区对应的层中具有含量不超过0.1wt％的磷。
在一个优选实施方案中，为了保持良好的玻璃化从而提高生产率，选择低但非零的磷含量。事实上，即使是极少量的磷也能显著改善玻璃化从而显著提高生产率，而且如果磷的量足够低将不会对折射率分布的锐度(sharpness)有负面影响，或者只有可忽略的负面影响。另一方面，在某些情况下完全没有磷存在会导致玻璃化问题。当预制品与光纤的内包层和环形区对应的层中磷含量为0.03wt％到0.1wt％时，可以获得精确的(sharp)折射率分布和导致高生产率的良好玻璃化之间较好的折衷结果。
预制品与光纤的外包层对应的层和预制品与光纤的内包层和环形区对应的层具有相同含量的磷更有利，即从0％到0.1％，优选从0.03％到0.1％。
层在不超过20％大气压力的压力下进行沉积更有利，而不在低压或极低压下例如大气压力的十分之一或百分之一进行沉积，更高的掺杂分压会增加可利用材料的数量，从而增加沉积的灰粒的尺寸。
如果光纤打算并入海底电缆，在最终的光纤中除去或大大减少磷含量的本发明方法特别有利，因为高含量的磷会增加光纤对深海放出γ射线的灵敏度，γ射线会逐渐加剧光纤的衰减。

Claims (5)

1.通过沉积层来生产色散位移光纤或色散补偿光纤预制品的CVD工艺，上述光纤具有由中心部分、内包层、环形区构成的芯和外包层，在该工艺中所述预制品与所述光纤的所述内包层和所述环形区对应的层中具有含量不超过0.1wt％的磷。
2.根据权利要求1的工艺，其中所述预制品与所述光纤的所述内包层和所述环形区对应的所述层中具有0.03wt％到0.1wt％的磷含量。
3.根据权利要求1的工艺，其中所述预制品与所述光纤的所述外包层对应的所述层和所述预制品与所述光纤的所述内包层和所述环形区对应的所述层中具有相同范围的磷含量。
4.根据权利要求1的工艺，其中所述预制品的各层在不超过20％大气压力的压力下沉积。
5.根据权利要求1的工艺，其中所述光纤旨在并入海底电缆中。
CNB2003101188984A 2002-12-05 2003-12-04 一种生产光纤预制品的方法 Expired - Fee Related CN1328603C (zh)

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FR0215332A FR2848206B1 (fr) 2002-12-05 2002-12-05 Procede de realisation de preforme a fibre optique
FR0215332 2002-12-05

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CN1328603C true CN1328603C (zh) 2007-07-25

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EP (1) EP1426342B1 (zh)
JP (1) JP2004284939A (zh)
CN (1) CN1328603C (zh)
AT (1) ATE323663T1 (zh)
DE (1) DE60304661T2 (zh)
DK (1) DK1426342T3 (zh)
FR (1) FR2848206B1 (zh)

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JP4985062B2 (ja) * 2006-04-14 2012-07-25 株式会社ニコン カメラ

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US4385802A (en) * 1980-06-09 1983-05-31 Corning Glass Works Long wavelength, low-loss optical waveguide
FR2576693A1 (fr) * 1985-01-30 1986-08-01 Comp Generale Electricite Procede de fabrication d'un composant optique a gradient d'indice de refraction
DE3820217A1 (de) * 1988-06-14 1989-12-21 Rheydt Kabelwerk Ag Lichtwellenleiter, insbesondere einmodenfaser
US5364429A (en) * 1991-07-25 1994-11-15 Alcatel Fibres Optiques Method of manufacturing active optical fibers
FR2742743A1 (fr) * 1995-12-20 1997-06-27 Alcatel Fibres Optiques Procede de fabrication d'une preforme de fibre optique
US20020159735A1 (en) * 2001-02-07 2002-10-31 Bent Edvold Dispersion compensating fiber with reduced splice loss and methods for making same

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US4566754A (en) * 1981-04-08 1986-01-28 British Telecommunications Optical fibres
FR2700006B1 (fr) * 1992-12-24 1995-03-17 France Telecom Appareil de mesure de profil d'indice d'une préforme de fibre optique comportant une enveloppe externe et un cÓoeur.
TW342460B (en) * 1996-01-16 1998-10-11 Sumitomo Electric Industries A dispersion shift fiber
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Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385802A (en) * 1980-06-09 1983-05-31 Corning Glass Works Long wavelength, low-loss optical waveguide
FR2576693A1 (fr) * 1985-01-30 1986-08-01 Comp Generale Electricite Procede de fabrication d'un composant optique a gradient d'indice de refraction
DE3820217A1 (de) * 1988-06-14 1989-12-21 Rheydt Kabelwerk Ag Lichtwellenleiter, insbesondere einmodenfaser
US5364429A (en) * 1991-07-25 1994-11-15 Alcatel Fibres Optiques Method of manufacturing active optical fibers
FR2742743A1 (fr) * 1995-12-20 1997-06-27 Alcatel Fibres Optiques Procede de fabrication d'une preforme de fibre optique
US20020159735A1 (en) * 2001-02-07 2002-10-31 Bent Edvold Dispersion compensating fiber with reduced splice loss and methods for making same

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ATE323663T1 (de) 2006-05-15
DE60304661D1 (de) 2006-05-24
CN1504783A (zh) 2004-06-16
EP1426342B1 (fr) 2006-04-19
EP1426342A1 (fr) 2004-06-09
DE60304661T2 (de) 2007-05-16
FR2848206A1 (fr) 2004-06-11
JP2004284939A (ja) 2004-10-14
US20040109942A1 (en) 2004-06-10
DK1426342T3 (da) 2006-06-06
FR2848206B1 (fr) 2005-02-25

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