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FR2441858A1 - Mono or multi-mode optical fibre - has central monomode core with multimode sheath esp. for data transmission - Google Patents

Mono or multi-mode optical fibre - has central monomode core with multimode sheath esp. for data transmission

Info

Publication number
FR2441858A1
FR2441858A1 FR7832499A FR7832499A FR2441858A1 FR 2441858 A1 FR2441858 A1 FR 2441858A1 FR 7832499 A FR7832499 A FR 7832499A FR 7832499 A FR7832499 A FR 7832499A FR 2441858 A1 FR2441858 A1 FR 2441858A1
Authority
FR
France
Prior art keywords
multimode
data transmission
optical fibre
dia
esp
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.)
Granted
Application number
FR7832499A
Other languages
French (fr)
Other versions
FR2441858B1 (en
Inventor
Jean-Yves Boniort
Claude Brehm
Jean-Pierre Dumas
Philippe Dupont
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.)
Alcatel Lucent SAS
Original Assignee
Compagnie Generale dElectricite SA
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 Compagnie Generale dElectricite SA filed Critical Compagnie Generale dElectricite SA
Priority to FR7832499A priority Critical patent/FR2441858A1/en
Publication of FR2441858A1 publication Critical patent/FR2441858A1/en
Application granted granted Critical
Publication of FR2441858B1 publication Critical patent/FR2441858B1/fr
Granted 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
    • G02B6/036—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
    • G02B6/03633—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 - -

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)

Abstract

The optical fibre is capable of working both in single and multimode for data transmission. The fibre is in three coaxial parts. The central element or core of glass (1) has a dia. of d1 with a surrounding sheath (2) of dia. d2 ths having a lower refractive index than the core. A further outer sleeve (3) of transparent plastic, such as silicon resin, has a dia d3 and a still lower refractive index. The dia. d2 is chosen such that d2/2L 0.383(n22 - n23) where n is the respective refractive index and L is wavelength transmitted in multimode. Monomode transmission is by the innermost component and is chosen such that d1/2L 0.383 (n21 - n22)-1/2, multimode transmission being by its surrounding sheath. In a typical case, n1=1.51 n2=1.505 and n3=1.45.
FR7832499A 1978-11-17 1978-11-17 Mono or multi-mode optical fibre - has central monomode core with multimode sheath esp. for data transmission Granted FR2441858A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7832499A FR2441858A1 (en) 1978-11-17 1978-11-17 Mono or multi-mode optical fibre - has central monomode core with multimode sheath esp. for data transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7832499A FR2441858A1 (en) 1978-11-17 1978-11-17 Mono or multi-mode optical fibre - has central monomode core with multimode sheath esp. for data transmission

Publications (2)

Publication Number Publication Date
FR2441858A1 true FR2441858A1 (en) 1980-06-13
FR2441858B1 FR2441858B1 (en) 1983-03-11

Family

ID=9215006

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7832499A Granted FR2441858A1 (en) 1978-11-17 1978-11-17 Mono or multi-mode optical fibre - has central monomode core with multimode sheath esp. for data transmission

Country Status (1)

Country Link
FR (1) FR2441858A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829529A (en) * 1987-06-15 1989-05-09 Spectra-Physics, Inc. Laser diode pumped fiber lasers with pump cavity
US4838638A (en) * 1987-02-16 1989-06-13 Fuji Photo Film Co., Ltd. Optical wavelength conversion device
GB2355541A (en) * 1999-10-23 2001-04-25 Marconi Electronic Syst Ltd Optic fibre with monomode core and multimode core or layer
WO2014057299A1 (en) 2012-10-11 2014-04-17 Draka Comteq Bv High bandwidth multimode optical fiber optimized for multimode and single-mode transmissions
US9570880B2 (en) 1998-11-25 2017-02-14 Imra America, Inc. Multi-mode fiber amplifier

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7656578B2 (en) 1997-03-21 2010-02-02 Imra America, Inc. Microchip-Yb fiber hybrid optical amplifier for micro-machining and marking

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2275786A1 (en) * 1974-06-21 1976-01-16 Corning Glass Works PROCESS FOR THE REALIZATION OF AN OPTICAL GLASS WAVE GUIDE
US4070091A (en) * 1976-04-16 1978-01-24 Northern Telecom Limited Optical fibre with enhanced security
FR2364187A1 (en) * 1976-09-08 1978-04-07 Int Standard Electric Corp EXTREMELY HIGH TENSILE OPTICAL FIBER

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2275786A1 (en) * 1974-06-21 1976-01-16 Corning Glass Works PROCESS FOR THE REALIZATION OF AN OPTICAL GLASS WAVE GUIDE
US4070091A (en) * 1976-04-16 1978-01-24 Northern Telecom Limited Optical fibre with enhanced security
FR2364187A1 (en) * 1976-09-08 1978-04-07 Int Standard Electric Corp EXTREMELY HIGH TENSILE OPTICAL FIBER

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838638A (en) * 1987-02-16 1989-06-13 Fuji Photo Film Co., Ltd. Optical wavelength conversion device
US4829529A (en) * 1987-06-15 1989-05-09 Spectra-Physics, Inc. Laser diode pumped fiber lasers with pump cavity
US9570880B2 (en) 1998-11-25 2017-02-14 Imra America, Inc. Multi-mode fiber amplifier
US9595802B2 (en) 1998-11-25 2017-03-14 Imra America, Inc. Multi-mode fiber amplifier
GB2355541A (en) * 1999-10-23 2001-04-25 Marconi Electronic Syst Ltd Optic fibre with monomode core and multimode core or layer
WO2014057299A1 (en) 2012-10-11 2014-04-17 Draka Comteq Bv High bandwidth multimode optical fiber optimized for multimode and single-mode transmissions
US9588285B2 (en) 2012-10-11 2017-03-07 Draka Comteq Bv High bandwidth multimode optical fiber optimized for multimode and single-mode transmissions
US9791620B2 (en) 2012-10-11 2017-10-17 Draka Comteq Bv High bandwidth multimode optical fiber optimized for multimode and single-mode transmissions

Also Published As

Publication number Publication date
FR2441858B1 (en) 1983-03-11

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