IT1211498B - Procedimento per ridurre l attenuazione in fibre ottiche - Google Patents

Procedimento per ridurre l attenuazione in fibre ottiche

Info

Publication number
IT1211498B
IT1211498B IT8767942A IT6794287A IT1211498B IT 1211498 B IT1211498 B IT 1211498B IT 8767942 A IT8767942 A IT 8767942A IT 6794287 A IT6794287 A IT 6794287A IT 1211498 B IT1211498 B IT 1211498B
Authority
IT
Italy
Prior art keywords
attenuation
procedure
reduce
optical fibers
fibers
Prior art date
Application number
IT8767942A
Other languages
English (en)
Other versions
IT8767942A0 (it
Inventor
Pietro Di Vita
Original Assignee
Cselt Centro Studi Lab Telecom
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.)
Filing date
Publication date
Application filed by Cselt Centro Studi Lab Telecom filed Critical Cselt Centro Studi Lab Telecom
Priority to IT8767942A priority Critical patent/IT1211498B/it
Publication of IT8767942A0 publication Critical patent/IT8767942A0/it
Priority to JP63259621A priority patent/JP2631533B2/ja
Priority to DE198888118223T priority patent/DE315132T1/de
Priority to DE8888118223T priority patent/DE3865627D1/de
Priority to EP88118223A priority patent/EP0315132B1/en
Priority to US07/266,734 priority patent/US4925472A/en
Priority to CA000582411A priority patent/CA1306854C/en
Priority to US07/349,992 priority patent/US4929264A/en
Application granted granted Critical
Publication of IT1211498B publication Critical patent/IT1211498B/it

Links

Classifications

    • 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
    • C03B37/10—Non-chemical treatment
    • C03B37/14—Re-forming fibres or filaments, i.e. changing their shape
    • 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
    • C03B37/10—Non-chemical treatment
    • C03B37/14—Re-forming fibres or filaments, i.e. changing their shape
    • C03B37/15—Re-forming fibres or filaments, i.e. changing their shape with heat application, e.g. for making optical fibres
IT8767942A 1987-11-05 1987-11-05 Procedimento per ridurre l attenuazione in fibre ottiche IT1211498B (it)

Priority Applications (8)

Application Number Priority Date Filing Date Title
IT8767942A IT1211498B (it) 1987-11-05 1987-11-05 Procedimento per ridurre l attenuazione in fibre ottiche
JP63259621A JP2631533B2 (ja) 1987-11-05 1988-10-17 光フアイバーにおける減衰を減少させる方法
DE198888118223T DE315132T1 (de) 1987-11-05 1988-11-02 Methode zur verminderung der daempfung von optischen fasern.
DE8888118223T DE3865627D1 (de) 1987-11-05 1988-11-02 Methode zur verminderung der daempfung von optischen fasern.
EP88118223A EP0315132B1 (en) 1987-11-05 1988-11-02 A method of reducing optical-fibre attenuation
US07/266,734 US4925472A (en) 1987-11-05 1988-11-03 Method of reducing optical-fiber attenuation
CA000582411A CA1306854C (en) 1987-11-05 1988-11-07 Method of reducing attenuation in optical fibres
US07/349,992 US4929264A (en) 1987-11-05 1989-05-10 Apparatus for reducing optical-fiber attenuation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8767942A IT1211498B (it) 1987-11-05 1987-11-05 Procedimento per ridurre l attenuazione in fibre ottiche

Publications (2)

Publication Number Publication Date
IT8767942A0 IT8767942A0 (it) 1987-11-05
IT1211498B true IT1211498B (it) 1989-11-03

Family

ID=11306567

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8767942A IT1211498B (it) 1987-11-05 1987-11-05 Procedimento per ridurre l attenuazione in fibre ottiche

Country Status (6)

Country Link
US (2) US4925472A (it)
EP (1) EP0315132B1 (it)
JP (1) JP2631533B2 (it)
CA (1) CA1306854C (it)
DE (2) DE315132T1 (it)
IT (1) IT1211498B (it)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005730A1 (de) * 1990-02-23 1991-08-29 Kabelmetal Electro Gmbh Vorrichtung zur herstellung einer lichtwellenleiter-vorform
US5228893A (en) * 1991-11-27 1993-07-20 At&T Bell Laboratories Optical fiber tension monitoring technique
AU2259399A (en) * 1999-01-28 2000-08-18 Telstra Corporation Limited Noise suppression in lightwave communication systems
CN1247477C (zh) * 1999-05-27 2006-03-29 住友电气工业株式会社 光纤的制造装置和制造方法
US20040057692A1 (en) * 2002-08-28 2004-03-25 Ball Laura J. Low loss optical fiber and method for making same
US7536877B2 (en) * 2003-04-04 2009-05-26 Fitel Ush Corp. Optical fiber fabrication and product
US20060130530A1 (en) * 2004-12-21 2006-06-22 Anderson James G Method of doping silica glass with an alkali metal, and optical fiber precursor formed therefrom
JP2009517702A (ja) * 2005-11-23 2009-04-30 コーニング インコーポレイテッド 低減衰／非ゼロ分散シフト光ファイバ
CN102081235A (zh) * 2010-12-08 2011-06-01 福州高意通讯有限公司 多模光纤中传输光信号均匀化、消偏振以及消相干的方法
CN102147236B (zh) * 2011-03-23 2012-09-26 南京大学 一种全分布式光纤应变及振动的传感方法与传感器
CN104007511A (zh) * 2014-05-30 2014-08-27 广东高聚激光有限公司 超声光纤光栅全光纤衰减器及光纤在线光功率衰减方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3300288A (en) * 1963-03-01 1967-01-24 Pittsburgh Plate Glass Co Method for the production of glass fibers
US3912478A (en) * 1974-06-17 1975-10-14 Bell Telephone Labor Inc Methods of introducing geometrical variations in optical fibers
JPS568106A (en) * 1979-06-30 1981-01-27 Toshiba Corp Manufacture of optical waveguide
JPS57175739A (en) * 1981-04-17 1982-10-28 Nippon Telegr & Teleph Corp <Ntt> Preparation of rod lens
US4447124A (en) * 1981-10-27 1984-05-08 Bell Telephone Laboratories, Incorporated Multimode optical fiber with radially varying attenuation center density
DD205154A1 (de) * 1982-05-27 1983-12-21 Adw D Ddr Berlin Verfahren zur herstellung von lichtleitfasern
JPS59227747A (ja) * 1983-06-09 1984-12-21 Showa Electric Wire & Cable Co Ltd 光フアイバ製造方法
GB2149392A (en) * 1983-11-11 1985-06-12 Central Electr Generat Board Surface treatment of glass
JPS6110409A (ja) * 1984-06-26 1986-01-17 Toyota Motor Corp インモ−ルドコ−テイング成形方法
FR2568254B1 (fr) * 1984-07-25 1988-04-29 Centre Nat Rech Scient Application d'oligonucleotides lies a un agent intercalant, notamment a titre de medicament

Also Published As

Publication number Publication date
DE3865627D1 (de) 1991-11-21
EP0315132A2 (en) 1989-05-10
CA1306854C (en) 1992-09-01
JPH01142607A (ja) 1989-06-05
IT8767942A0 (it) 1987-11-05
EP0315132A3 (en) 1990-02-07
EP0315132B1 (en) 1991-10-16
DE315132T1 (de) 1990-05-03
JP2631533B2 (ja) 1997-07-16
US4929264A (en) 1990-05-29
US4925472A (en) 1990-05-15

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970924