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DE69730945D1 - Optische faser mit modifiziertem drall zur verringerung der polarisationsmodendispersion sowie verfahren zu ihrer herstellung - Google Patents

Optische faser mit modifiziertem drall zur verringerung der polarisationsmodendispersion sowie verfahren zu ihrer herstellung

Info

Publication number
DE69730945D1
DE69730945D1 DE69730945T DE69730945T DE69730945D1 DE 69730945 D1 DE69730945 D1 DE 69730945D1 DE 69730945 T DE69730945 T DE 69730945T DE 69730945 T DE69730945 T DE 69730945T DE 69730945 D1 DE69730945 D1 DE 69730945D1
Authority
DE
Germany
Prior art keywords
production
optical fiber
polarization mode
mode dispersion
reduce polarization
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE69730945T
Other languages
English (en)
Inventor
L Henderson
Ming-Jun Li
R Washburn
A Nolan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Corning Inc
Original Assignee
Corning Inc
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 Corning Inc filed Critical Corning Inc
Application granted granted Critical
Publication of DE69730945D1 publication Critical patent/DE69730945D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • G02B6/02285—Characterised by the polarisation mode dispersion [PMD] properties, e.g. for minimising PMD
    • 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
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • 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
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C03B37/02745—Fibres having rotational spin around the central longitudinal axis, e.g. alternating +/- spin to reduce polarisation mode dispersion
    • 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
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/03—Drawing means, e.g. drawing drums ; Traction or tensioning devices
    • 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
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/03—Drawing means, e.g. drawing drums ; Traction or tensioning devices
    • C03B37/032—Drawing means, e.g. drawing drums ; Traction or tensioning devices for glass optical fibres
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2203/00—Fibre product details, e.g. structure, shape
    • C03B2203/02—External structure or shape details
    • C03B2203/06—Axial perturbations, e.g. twist, by torsion, undulating, crimped
    • 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
    • C03B2203/18—Axial perturbations, e.g. in refractive index or composition
    • 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
    • C03B2203/18—Axial perturbations, e.g. in refractive index or composition
    • C03B2203/20—Axial perturbations, e.g. in refractive index or composition helical
    • 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)
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/06—Rotating the fibre fibre about its longitudinal axis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Inorganic Fibers (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
DE69730945T 1996-01-22 1997-01-21 Optische faser mit modifiziertem drall zur verringerung der polarisationsmodendispersion sowie verfahren zu ihrer herstellung Expired - Lifetime DE69730945D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US1037696P 1996-01-22 1996-01-22
PCT/US1997/000605 WO1997026221A1 (en) 1996-01-22 1997-01-21 Optical fiberof modulated spin for reduced polarisation mode dispersion as well as process and apparatus for its manufacture

Publications (1)

Publication Number Publication Date
DE69730945D1 true DE69730945D1 (de) 2004-11-04

Family

ID=21745481

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69730945T Expired - Lifetime DE69730945D1 (de) 1996-01-22 1997-01-21 Optische faser mit modifiziertem drall zur verringerung der polarisationsmodendispersion sowie verfahren zu ihrer herstellung

Country Status (12)

Country Link
US (2) US5943466A (de)
EP (1) EP0876305B1 (de)
JP (1) JP3226283B2 (de)
KR (1) KR100470430B1 (de)
CN (1) CN1113823C (de)
AU (1) AU719604B2 (de)
BR (1) BR9707059A (de)
CA (1) CA2242989A1 (de)
DE (1) DE69730945D1 (de)
RU (1) RU2166484C2 (de)
TW (1) TW337000B (de)
WO (1) WO1997026221A1 (de)

Families Citing this family (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1012641A4 (de) * 1996-10-07 2002-05-22 Corning Inc Sensorvorrichtung mit polarisationserhaltenden fasern
DE19810812A1 (de) * 1998-03-12 1999-09-16 Siemens Ag Optisches Übertragungselement sowie Verfahren zur Reduzierung dessen Polarisationsmoden-Dispersion
KR20010071612A (ko) 1998-06-24 2001-07-28 지아네시 피에르 지오반니 원석으로부터 광섬유를 제조하기 위한 장치 및 방법
NZ509043A (en) * 1998-06-24 2003-09-26 Pirelli Cavi E Sistemi Spa Method and apparatus for twisting a coated optical fiber during drawing from a preform
KR20020012548A (ko) * 1999-04-26 2002-02-16 알프레드 엘. 미첼슨 저분극모드 분산 및 저감쇠 광섬유의 제조방법 및 그 광섬유
JP4076702B2 (ja) 1999-05-14 2008-04-16 株式会社フジクラ 光ファイバの捻れ測定方法
JP2003513267A (ja) * 1999-10-29 2003-04-08 ピレリー・カビ・エ・システミ・ソチエタ・ペル・アツィオーニ 光ファイバーに与えられたねじれを測定する方法およびこの方法を用いて光ファイバーを処理する手順
WO2001035132A1 (fr) * 1999-11-08 2001-05-17 Sumitomo Electric Industries, Ltd. Fibre optique, son procede de fabrication et systeme de transmission optique la contenant
ES2272498T3 (es) * 2000-07-06 2007-05-01 Prysmian Cavi E Sistemi Energia S.R.L. Fibra optica con dispersion de polirizacion de modo reducida y procedimiento para la obtecion de una fibra optica con dispersion de polirizan de modo reducida.
US7120323B2 (en) 2000-08-02 2006-10-10 Kvh Industries, Inc. Reduction of linear birefringence in circular-cored single-mode fiber
BRPI0116585B1 (pt) * 2000-12-28 2015-08-04 Prysmian Cavi Sistemi Energia Cabo óptico para telecomunicações, fibra óptica adequada para uso em um cabo óptico, e, método para confeccionar a mesma
KR100417000B1 (ko) * 2001-12-03 2004-02-05 삼성전자주식회사 저 편광 모드 분산을 위한 장치
US6735985B2 (en) * 2001-12-20 2004-05-18 Furukawa Electric North America Inc Method of impressing a twist on a multimode fiber during drawing
KR100416970B1 (ko) * 2002-01-17 2004-02-05 삼성전자주식회사 인출된 광섬유의 저 편광모드분산을 위한 스핀 장치
US6920271B2 (en) * 2002-02-11 2005-07-19 Corning Incorporated Reduced polarization mode dispersion fiber
JP3765283B2 (ja) * 2002-04-01 2006-04-12 住友電気工業株式会社 光ファイバの製造方法および製造装置
US6859596B2 (en) * 2002-07-23 2005-02-22 Fitel Usa Corp. Systems and methods for forming ultra-low PMD optical fiber using amplitude and frequency keyed fiber spin functions
US6791678B2 (en) 2002-07-23 2004-09-14 Fitel Usa Corp. System and method for obtaining spin and mechanical twist data during optical fiber draw
US7352971B2 (en) 2002-08-02 2008-04-01 Nortel Networks Limited Broadband control of polarization mode dispersion
US6704100B2 (en) 2002-08-08 2004-03-09 Fitel Usa Corp. Systems and methods for accurately measuring low values of polarization mode dispersion in an optical fiber using localized external perturbation induced low mode coupling
KR100441156B1 (ko) * 2002-08-31 2004-07-19 엘지전선 주식회사 광섬유에 인가되는 스핀을 모니터링하는 방법 및 양방향스핀의 대칭성을 확보하기 위한 광섬유 제조방법
KR100401342B1 (en) * 2002-08-31 2003-10-10 Lg Cable Ltd Apparatus for spinning optical fiber and apparatus and method for fabricating optical fiber using the same
WO2004050573A1 (en) 2002-09-25 2004-06-17 Giacomo Stefano Roba Process for producing an optical fiber having a low polarization mode dispersion
US7035525B2 (en) * 2002-09-26 2006-04-25 Fitel Usa Corp. Methods and apparatuses for correcting mechanical twist in optical fiber
KR100498925B1 (ko) * 2002-10-23 2005-07-04 삼성전자주식회사 스핀 진폭 변조를 이용한 광섬유 인출 방법
US7891216B2 (en) * 2002-12-30 2011-02-22 Prysmian Cavi E Sistemi Energia S.R.L. Method for producing an optical fiber having low polarization mode dispersion
US7310974B2 (en) * 2003-01-13 2007-12-25 Sterlite Optical Technologies Limited Method for producing twisted optical fiber with reduced polarization mode dispersion
US6937325B2 (en) * 2003-01-30 2005-08-30 Fitel U.S.A. Corporation Method and apparatus for measuring eccentricity in a optical fiber
US7861556B2 (en) * 2003-02-28 2011-01-04 Corning Incorporated Method and apparatus for impulsively spinning optical fiber
US6876804B2 (en) * 2003-03-20 2005-04-05 Corning Incorporated Method of making a spun optical fiber with low polarization mode dispersion
FR2856805B1 (fr) * 2003-06-24 2005-10-28 Cit Alcatel Systeme cotre la dispersion modale de polarisation d'une fibre optique
AU2003277845B2 (en) * 2003-08-29 2010-08-05 Prysmian Cavi E Sistemi Energia S.R.L. Process for producing a low polarization mode dispersion optical fiber
US6993229B2 (en) * 2003-09-30 2006-01-31 Corning Incorporated Method of making spun optical fiber with low PMD
RU2339982C2 (ru) * 2003-10-22 2008-11-27 Фудзикура Лтд. Оптическое волокно и способ измерения поляризационной модовой дисперсии оптического волокна
RU2326825C2 (ru) * 2003-12-26 2008-06-20 Фудзикура Лтд. Устройство для скручивания оптического волокна, способ изготовления оптического волокна и оптическое волокно
ATE429657T1 (de) * 2003-12-30 2009-05-15 Prysmian Spa Optische faserverbindung mit niedriger polarisationsmodendispersion (pmd) und herstellungsverfahren dafür
EP1725853B1 (de) * 2004-02-20 2014-10-01 Prysmian S.p.A. Verfahren zur bestimmung der spinnmerkmalen von optischen spinnfasern
US20050188728A1 (en) * 2004-03-01 2005-09-01 Zhi Zhiou Apparatus and method for manufacturing optical fiber including rotating optical fiber preforms during draw
WO2005100274A1 (ja) * 2004-04-07 2005-10-27 Fujikura Ltd. 光ファイバの製造方法、光ファイバ
WO2006046947A2 (en) * 2004-10-24 2006-05-04 Chiral Photonics, Inc. Chiral in-fiber polarizer apparatus and method
US7317855B2 (en) * 2004-12-16 2008-01-08 Corning Incorporated Method of imparting twist to optical fiber
KR100642378B1 (ko) * 2005-04-04 2006-11-03 엘에스전선 주식회사 광섬유 주변의 압력 변화를 이용하여 편광모드분산을개선하는 장치 및 이를 이용한 광섬유 제조장치
PL2033029T3 (pl) * 2006-06-22 2019-05-31 Prysmian Spa Włókno światłowodowe mające spin o funkcji sinusoidalnej
RU2325037C2 (ru) * 2006-07-04 2008-05-20 Общество с ограниченной ответственностью "Научно-производственное предприятие СвязьАвтоматикаМонтаж" (ООО НПП САМ) Способ определения длины биений оптического волокна на участке линии передачи
KR100872235B1 (ko) 2006-11-17 2008-12-05 엘에스전선 주식회사 편광모드분산 저감을 위한 단일모드 광섬유의 인선방법 및이 방법에 의해 제조된 광섬유
DK2256527T3 (en) 2008-02-28 2017-02-13 Sumitomo Electric Industries Optical fiber
CN102057305B (zh) * 2008-06-05 2013-05-01 住友电气工业株式会社 包覆光纤制造装置以及包覆光纤制造方法
US8111957B2 (en) * 2008-07-10 2012-02-07 Corning Incorporated +cylindrical polarization beams
WO2010047294A1 (ja) * 2008-10-20 2010-04-29 住友電気工業株式会社 光ファイバの製造方法および製造装置
CN102503116B (zh) * 2011-10-14 2014-04-23 武汉长盈通光电技术有限公司 一种旋转光纤的制造方法及旋转收纤装置
JP5903123B2 (ja) * 2014-04-07 2016-04-13 株式会社フジクラ 光ファイバ素線の製造方法および製造装置
RU2614535C1 (ru) * 2015-12-23 2017-03-28 Федеральное государственное бюджетное образовательное учреждение высшего образования "Поволжский государственный университет телекоммуникаций и информатики" (ФГБОУ ВО ПГУТИ) Способ уменьшения дифференциальной модовой задержки волоконно-оптической линии передачи
KR20190001401U (ko) 2017-12-04 2019-06-12 김윤성 도포구가 구비된 화장용 팩 용구
KR102489354B1 (ko) 2020-12-28 2023-01-17 주식회사 유아트코리아 마스크팩 조성물 보관성이 향상된 마스크팩 용구

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2295224A1 (fr) * 1974-12-16 1976-07-16 Europ Turb Vapeur Disque monte sur un arbre de turbine
JPS5311039A (en) * 1976-07-19 1978-02-01 Hitachi Ltd Controller of diameter of optical fiber
US4308045A (en) * 1978-03-10 1981-12-29 Bell Telephone Laboratories, Incorporated Method for fabricating optical fibers with enhanced mode coupling
US4248035A (en) * 1979-04-02 1981-02-03 Northern Telecom Limited Apparatus and method used in the assembly of fibre optic cables
DE3022088C2 (de) * 1980-06-12 1984-06-14 Siemens AG, 1000 Berlin und 8000 München Verfahren zum Ablegen von strangförmigem Gut, insbesondere elektrischem und/oder optischem Nachrichtenkabel
GB2101762B (en) * 1981-07-07 1984-11-28 Central Electr Generat Board Optic fibre
US4473273A (en) * 1981-09-04 1984-09-25 Trw Inc. High bandwidth fiber and method of forming the same by preform rotation during drawing
FR2515632A1 (fr) * 1981-11-03 1983-05-06 Thomson Csf Procede d'obtention d'un objet a structure chiralique issu de l'etirage a partir d'une source de matiere ramollie, et dispositif mettant en oeuvre ce procede
FR2537731B1 (fr) * 1982-12-10 1986-01-17 Thomson Csf Procede de fabrication d'une fibre conservant la polarisation circulaire et dispositif mettant en oeuvre ce procede
RU2002709C1 (ru) * 1991-06-28 1993-11-15 Институт точной механики и оптики г.Санкт-Петербурга Способ изготовлени волоконно-оптического светоделител и устройство дл его осуществлени
US5298047A (en) * 1992-08-03 1994-03-29 At&T Bell Laboratories Method of making a fiber having low polarization mode dispersion due to a permanent spin
US5704960A (en) * 1995-12-20 1998-01-06 Corning, Inc. Method of forming an optical fiber for reduced polarization effects in amplifiers

Also Published As

Publication number Publication date
BR9707059A (pt) 1999-07-20
TW337000B (en) 1998-07-21
CN1113823C (zh) 2003-07-09
WO1997026221A1 (en) 1997-07-24
KR100470430B1 (ko) 2005-06-21
CA2242989A1 (en) 1997-07-24
KR19990081869A (ko) 1999-11-15
US5943466A (en) 1999-08-24
AU719604B2 (en) 2000-05-11
JPH11508221A (ja) 1999-07-21
RU2166484C2 (ru) 2001-05-10
AU1579497A (en) 1997-08-11
US6240748B1 (en) 2001-06-05
JP3226283B2 (ja) 2001-11-05
CN1209793A (zh) 1999-03-03
EP0876305A1 (de) 1998-11-11
EP0876305B1 (de) 2004-09-29

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