JPS56102809A - Double structure optical fiber - Google Patents

Double structure optical fiber

Info

Publication number
JPS56102809A
JPS56102809A JP521380A JP521380A JPS56102809A JP S56102809 A JPS56102809 A JP S56102809A JP 521380 A JP521380 A JP 521380A JP 521380 A JP521380 A JP 521380A JP S56102809 A JPS56102809 A JP S56102809A
Authority
JP
Japan
Prior art keywords
wavelength
light
optical fiber
fiber
light source
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.)
Pending
Application number
JP521380A
Other languages
Japanese (ja)
Inventor
Masamitsu Tokuda
Tadatoshi Tanifuji
Tsuneo Horiguchi
Hashio Nakahira
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP521380A priority Critical patent/JPS56102809A/en
Publication of JPS56102809A publication Critical patent/JPS56102809A/en
Pending 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
    • G02B6/03638—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 3 layers only
    • G02B6/0365—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 3 layers only arranged - - +
    • 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
    • G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
    • G02B6/0283—Graded index region external to the central core segment, e.g. sloping layer or triangular or trapezoidal layer
    • G02B6/0285—Graded index layer adjacent to the central core segment and ending at the outer cladding index
    • 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 Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

PURPOSE:To economize the light communication system and improve the reliability, by constituting two kinds of double optical fibers. CONSTITUTION:This optical fiber is composed of core part 1 of the single mode fiber, clad parts 2 of the single mode fiber and step type multimode fiber, clad part 3 of the step type multimode fiber, and jacket layer 6. Quartz glass is used for jacket layer 6, and boron and so on are doped for clad parts 2 and 3 to make the refractive index smaller than that of quartz glass. Connection of this optical fiber to the light source and the photodetector is realized by the directional coupler such as a half mirror and the wavelength selective interference filter. In the figure, 7 and 8 are the light source for signal transmission (wavelength is lambda1) and the light source for feeding or monitor (wavelength is lambda2), and interference filter 9 permits only the light of wavelength lambda1 to transmit, and the light of wavelength lambda2 is reflected, and the light to optical fiber 11 is excited by lens 10.
JP521380A 1980-01-22 1980-01-22 Double structure optical fiber Pending JPS56102809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP521380A JPS56102809A (en) 1980-01-22 1980-01-22 Double structure optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP521380A JPS56102809A (en) 1980-01-22 1980-01-22 Double structure optical fiber

Publications (1)

Publication Number Publication Date
JPS56102809A true JPS56102809A (en) 1981-08-17

Family

ID=11604908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP521380A Pending JPS56102809A (en) 1980-01-22 1980-01-22 Double structure optical fiber

Country Status (1)

Country Link
JP (1) JPS56102809A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2355541A (en) * 1999-10-23 2001-04-25 Marconi Electronic Syst Ltd Optic fibre with monomode core and multimode core or layer
US7106932B2 (en) 2001-05-04 2006-09-12 Crystal Fibre A/S Method and apparatus relating to optical fibers
KR100638435B1 (en) 2004-11-02 2006-10-24 주식회사 효성 Step index plastic optical fiber and the method of preparing the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4861151A (en) * 1971-12-02 1973-08-27
JPS5465554A (en) * 1977-11-04 1979-05-26 Fujitsu Ltd Combined wide band optical fiber

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4861151A (en) * 1971-12-02 1973-08-27
JPS5465554A (en) * 1977-11-04 1979-05-26 Fujitsu Ltd Combined wide band optical fiber

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2355541A (en) * 1999-10-23 2001-04-25 Marconi Electronic Syst Ltd Optic fibre with monomode core and multimode core or layer
US7106932B2 (en) 2001-05-04 2006-09-12 Crystal Fibre A/S Method and apparatus relating to optical fibers
KR100638435B1 (en) 2004-11-02 2006-10-24 주식회사 효성 Step index plastic optical fiber and the method of preparing the same

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