JP5974455B2 - 光ファイバ母材、光ファイバ製造方法および光ファイバ - Google Patents
光ファイバ母材、光ファイバ製造方法および光ファイバ Download PDFInfo
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- 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 - +
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- C03C2203/00—Production processes
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- 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
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- 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
- G02B6/02228—Dispersion flattened fibres, i.e. having a low dispersion variation over an extended wavelength range
- G02B6/02238—Low dispersion slope fibres
- G02B6/02242—Low dispersion slope fibres having a dispersion slope <0.06 ps/km/nm2
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- 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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- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2964—Artificial fiber or filament
Description
Claims (10)
- 石英ガラス系の光ファイバ母材であって、
平均濃度5原子ppm以上のアルカリ金属元素を含有するコア部と、前記コア部の外周に設けられた第一クラッド部と、前記第一クラッド部の外周に設けられた第二クラッド部とを備え、
前記第一クラッド部の外周部におけるOH基の濃度が最大値で200mol ppm以上であって、前記OH基濃度の上限値が2000mol ppm以下である、
ことを特徴とする光ファイバ母材。 - 前記第一クラッド部は、線引後の光ファイバとした際の直径が30μm以上45μm以下に相当する外径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母材。
- 前記コア部のアルカリ金属元素の濃度の平均値が500原子ppm以下であることを特徴とする請求項1に記載の光ファイバ母材。
- 前記コア部のOH基の濃度の平均値が0.01mol ppm以下であることを特徴とする請求項1に記載の光ファイバ母材。
- 前記第一クラッド部に対する前記第二クラッド部の比屈折率差が0.01%以上であることを特徴とする請求項1に記載の光ファイバ母材。
- 前記コア部が塩素元素およびフッ素元素を更に含有し、
前記コア部におけるアルカリ金属元素,塩素元素およびフッ素元素を除くドーパントの濃度が、前記コア部全体の平均値で10原子ppm以下である、
ことを特徴とする請求項1に記載の光ファイバ母材。 - 前記コア部が、中心軸を含む第一コア部と、前記第一コア部の外周に設けられた第二コア部とを含み、
前記第一コア部のアルカリ金属元素の濃度の最大値が100原子ppm以上であり、前記第一コア部の塩素元素の濃度の平均値が1000原子ppm以下であり、
前記第二コア部のアルカリ金属元素の平均値が10原子ppm以下であり、前記第二コア部の塩素元素の濃度の平均値が1000原子ppm以上である、
ことを特徴とする請求項1に記載の光ファイバ母材。 - 請求項1〜7の何れか1項に記載の光ファイバ母材を線引して、波長1550nmにおける伝送損失が0.180dB/km以下であって波長1380nmにおける伝送損失が0.80dB/km以下である光ファイバを製造することを特徴とする光ファイバ製造方法。
- アルカリ金属元素を含有するコア領域と、前記コア領域の外周に設けられた第一クラッド領域と、前記第一クラッド領域の外周に設けられた第二クラッド領域とを備え、
前記第一クラッド領域と前記第二クラッド領域との界面領域におけるOH基の濃度が1mol ppm以上であり、
前記第一クラッド領域の外径が30μm以上45μm以下であり、前記コア領域および前記第一クラッド領域に圧縮応力が残留し、波長1550nmにおける伝送損失が0.185dB/km以下であり、波長1380nmにおける伝送損失が0.80dB/km以下である、
ことを特徴とする光ファイバ。 - 前記コア領域のアルカリ金属元素の濃度の平均値が0.2ppm以上であることを特徴とする請求項9に記載の光ファイバ。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011253913A JP5974455B2 (ja) | 2011-11-21 | 2011-11-21 | 光ファイバ母材、光ファイバ製造方法および光ファイバ |
US14/127,266 US9036972B2 (en) | 2011-11-21 | 2012-11-16 | Optical fiber preform, method for producing optical fiber, and optical fiber |
DK12851113.6T DK2784033T3 (en) | 2011-11-21 | 2012-11-16 | OPTICAL FIBER FORM, PROCEDURE FOR MAKING OPTICAL FIBER, AND OPTICAL FIBER |
PCT/JP2012/079769 WO2013077263A1 (ja) | 2011-11-21 | 2012-11-16 | 光ファイバ母材、光ファイバ製造方法および光ファイバ |
CN201280030434.5A CN103619767B (zh) | 2011-11-21 | 2012-11-16 | 光纤预制件、光纤的制备方法以及光纤 |
EP12851113.6A EP2784033B1 (en) | 2011-11-21 | 2012-11-16 | Optical fiber preform, method for producing optical fiber, and optical fiber |
US14/569,987 US9229160B2 (en) | 2011-11-21 | 2014-12-15 | Optical fiber preform, method for producing optical fiber, and optical fiber |
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JP6337509B2 (ja) * | 2014-02-24 | 2018-06-06 | 住友電気工業株式会社 | 光ファイバ母材製造方法 |
DK3173388T3 (en) * | 2014-07-22 | 2018-10-29 | Sumitomo Electric Industries | PROCEDURE FOR MANUFACTURING OPTICAL FIBER PREFORM |
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EP2784033B1 (en) | 2016-12-28 |
DK2784033T3 (en) | 2017-02-13 |
WO2013077263A1 (ja) | 2013-05-30 |
CN103619767B (zh) | 2017-07-28 |
JP2013107792A (ja) | 2013-06-06 |
US20140254997A1 (en) | 2014-09-11 |
US20150098682A1 (en) | 2015-04-09 |
US9229160B2 (en) | 2016-01-05 |
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