WO1991013038A1 - Fibre dopee au metal des terres rares - Google Patents

Fibre dopee au metal des terres rares Download PDF

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Publication number
WO1991013038A1
WO1991013038A1 PCT/AU1991/000068 AU9100068W WO9113038A1 WO 1991013038 A1 WO1991013038 A1 WO 1991013038A1 AU 9100068 W AU9100068 W AU 9100068W WO 9113038 A1 WO9113038 A1 WO 9113038A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibre
rare
core
doped
inner core
Prior art date
Application number
PCT/AU1991/000068
Other languages
English (en)
Inventor
Steven James Frisken
Original Assignee
Otc Limited
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 Otc Limited filed Critical Otc Limited
Publication of WO1991013038A1 publication Critical patent/WO1991013038A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL 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
    • C03C13/00—Fibre or filament compositions
    • C03C13/04—Fibre optics, e.g. core and clad fibre compositions
    • C03C13/045—Silica-containing oxide glass compositions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
    • H01S3/0672—Non-uniform radial doping

Definitions

  • the present invention relates to rare-earth doped fibres for optical amplifiers and fibre lasers.
  • Fused silica fibres form the basis of most single mode optical fibre applications.
  • the effective operation of the fibre is dependant on the confinement of the light wave to the core of the fibre. This is achieved by different refractive Indexes, with a high refractive index being provided in the core as compared to that of the surrounding cladding.
  • N.A. Aperture (N.A.). The extent of confinement is dependant upon the number of modes that operate within the core, the wavelength of the light and the N.A.
  • these losses must be kept minimal by ensuring that the overlap of the intensity profiles of both fibres remain large for the signal wavelength.
  • the fibre should also remain single moded at a single wavelength.
  • a rare-earth metal doped fibre of small radius for use in an optical amplifier or fibre laser, said fibre having a rare-earth metal doped inner core of a high Numerical Aperture, and an outer core of larger radius than the inner core, said outer core having a
  • the inner core is doped with Erbium, and the outer core is not doped.
  • an optical fibre 1 which may be used in an optical amplifier or fibre laser.
  • the fibre 1 has an Inner core 3 which is doped with a rare-earth metal, preferably Erbium.
  • the inner core has a high Numerical Aperture and is preferably doped in Its central region.
  • Surrounding the inner core is an outer core 4 which is not doped with a rare-earth metal, or has a low dopant concentration.
  • the outer core has a larger radius relative to the inner core and has a low Numerical Aperture relative to the inner core 3.
  • Surrounding the outer core 4 is a cladding 2.
  • the inner core 3 allows a high intensity light to be obtained for both the pump and the signal wavelengths. This is done without affecting the coupling ability with a standard telecommunications fibre (the signal coupling efficiency). As the Erbium dopant is confined to a small area within the core, greater increases can be obtained in the gain in the amplifier.
  • Numerical Aperture means the local Numerical Aperture relative to the cladding, which could, for example, be pure silica, with a refractive index of 1.46.
  • the pump wavelength is considerably shorter than the signal.
  • the signal wavelength is at about 1.536 ⁇ m, and two of the possible pumping bands are at 980 nm and 820 nm.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Lasers (AREA)

Abstract

Fibre dopée au métal des terres rares (1) de rayon restreint destinée à être utilisée dans un amplificateur optique ou un laser à fibre. La fibre (1) a un noyau interne (3) dopé au métal des terres rares de manière à avoir une ouverture numérique élevée. Le noyau externe (4) qui entoure le noyau interne (3) a une valeur d'ouverture numérique faible et est lui-même entouré d'une gaine (2).
PCT/AU1991/000068 1990-02-28 1991-02-28 Fibre dopee au metal des terres rares WO1991013038A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPJ8872 1990-02-28
AUPJ887290 1990-02-28

Publications (1)

Publication Number Publication Date
WO1991013038A1 true WO1991013038A1 (fr) 1991-09-05

Family

ID=3774523

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1991/000068 WO1991013038A1 (fr) 1990-02-28 1991-02-28 Fibre dopee au metal des terres rares

Country Status (1)

Country Link
WO (1) WO1991013038A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2273389A (en) * 1992-12-14 1994-06-15 Pirelli Cavi Spa Rare earth doped optical fibre amplifier
CN1038029C (zh) * 1993-07-22 1998-04-15 中国建筑材料科学研究院 改性掺铒石英光纤
CN111129927A (zh) * 2019-12-30 2020-05-08 大族激光科技产业集团股份有限公司 光纤激光器以及激光发射装置
RU2740005C1 (ru) * 2019-05-07 2020-12-30 Тойота Дзидося Кабусики Кайся Оптоволоконное лазерное устройство

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61262708A (ja) * 1985-05-17 1986-11-20 Sumitomo Electric Ind Ltd １．５ミクロン帯用シングルモ−ド光フアイバ
JPS6252508A (ja) * 1985-09-02 1987-03-07 Nippon Telegr & Teleph Corp <Ntt> 光フアイバ
EP0313209A1 (fr) * 1987-10-22 1989-04-26 BRITISH TELECOMMUNICATIONS public limited company Fibre optique avec additif fluorescent
EP0320990A2 (fr) * 1987-12-17 1989-06-21 Polaroid Corporation Lasers et amplificateurs à fibre optique
JPH01224706A (ja) * 1988-03-04 1989-09-07 Sumitomo Electric Ind Ltd 光ファイバ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61262708A (ja) * 1985-05-17 1986-11-20 Sumitomo Electric Ind Ltd １．５ミクロン帯用シングルモ−ド光フアイバ
JPS6252508A (ja) * 1985-09-02 1987-03-07 Nippon Telegr & Teleph Corp <Ntt> 光フアイバ
EP0313209A1 (fr) * 1987-10-22 1989-04-26 BRITISH TELECOMMUNICATIONS public limited company Fibre optique avec additif fluorescent
EP0320990A2 (fr) * 1987-12-17 1989-06-21 Polaroid Corporation Lasers et amplificateurs à fibre optique
JPH01224706A (ja) * 1988-03-04 1989-09-07 Sumitomo Electric Ind Ltd 光ファイバ

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DERWENT ABSTRACT, Accession No. 87-003182/01, Class V07; & JP,A,61 262 708, (SUMITOMO ELECTRIC INDUSTRIES KK), 20 November 1986. *
PATENT ABSTRACTS OF JAPAN, P-603, page 61; & JP,A,62 052 508, (NIPPON TELEGRAPH AND TELEPHONE CORPORATION), 7 March 1987. *
PATENT ABSTRACTS OF JAPAN, P-970, page 55; & JP,A,1 224 706, (SUMITOMO ELECTRIC INDUSTRIES LIMITED), 7 September 1989. *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2273389A (en) * 1992-12-14 1994-06-15 Pirelli Cavi Spa Rare earth doped optical fibre amplifier
US5491581A (en) * 1992-12-14 1996-02-13 Pirelli Cavi S.P.A. Rare earth doped optical fibre amplifiers
GB2273389B (en) * 1992-12-14 1996-07-17 Pirelli Cavi Spa Rare earth doped optical fibre amplifiers
CN1038029C (zh) * 1993-07-22 1998-04-15 中国建筑材料科学研究院 改性掺铒石英光纤
RU2740005C1 (ru) * 2019-05-07 2020-12-30 Тойота Дзидося Кабусики Кайся Оптоволоконное лазерное устройство
US11424589B2 (en) 2019-05-07 2022-08-23 Toyota Jidosha Kabushiki Kaisha Optical fiber laser device
CN111129927A (zh) * 2019-12-30 2020-05-08 大族激光科技产业集团股份有限公司 光纤激光器以及激光发射装置

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