JPS572005A - Leakage optical fiber - Google Patents

Leakage optical fiber

Info

Publication number
JPS572005A
JPS572005A JP7586680A JP7586680A JPS572005A JP S572005 A JPS572005 A JP S572005A JP 7586680 A JP7586680 A JP 7586680A JP 7586680 A JP7586680 A JP 7586680A JP S572005 A JPS572005 A JP S572005A
Authority
JP
Japan
Prior art keywords
refractive index
optical fiber
clad
leakage
core
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
JP7586680A
Other languages
Japanese (ja)
Inventor
Kimiharu Kanamaru
Hideyuki Nozawa
Hiroshi Kajioka
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP7586680A priority Critical patent/JPS572005A/en
Publication of JPS572005A publication Critical patent/JPS572005A/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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2852—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using tapping light guides arranged sidewardly, e.g. in a non-parallel relationship with respect to the bus light guides (light extraction or launching through cladding, with or without surface discontinuities, bent structures)

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PURPOSE:To iluminate markers which are linearly continued, by use of a single light source, by setting a difference of the refractive index of a core material and a clad material of a clad type optical fiber, in a specific range. CONSTITUTION:In a leakage optical fiber 1, the circumference of a core 2 having a high refractive index is surrounded by a clad 3 having a comparatively low refractive index, and it is further coated with a transparent protective layer 4. A clad type optical fiber is constituted in this way, and a difference of the refractive index of the core 2 and the clad 3 is set within the range of 0.05-0.1% of the refractive index of the core 2. In case a difference of the refractive index of the core 2 and the clad 3 is 0.1% or more, the quantity of leakage light is decreased remarkably, therefore, the quantity of illumination light becomes short, and in the event of 0.05% or less, the quantity of leakage light is increased and it becomes impossible to uniformly illuminate the illumination range. In case this leakage optical fiber is used for an optical information transmission line, for instance, the leakage optical fiber 1 is connected in advance between usual optical fibers 8, and a light source such as a light emission diode, which emit a light beam by an electric signal is placed in a light source box 5.
JP7586680A 1980-06-05 1980-06-05 Leakage optical fiber Pending JPS572005A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7586680A JPS572005A (en) 1980-06-05 1980-06-05 Leakage optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7586680A JPS572005A (en) 1980-06-05 1980-06-05 Leakage optical fiber

Publications (1)

Publication Number Publication Date
JPS572005A true JPS572005A (en) 1982-01-07

Family

ID=13588596

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7586680A Pending JPS572005A (en) 1980-06-05 1980-06-05 Leakage optical fiber

Country Status (1)

Country Link
JP (1) JPS572005A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188085A2 (en) * 1985-01-09 1986-07-23 Stc Plc Optical fibre transmission systems
US5748813A (en) * 1992-07-28 1998-05-05 British Telecommunications Pubic Limited Company Free space optical communication system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017850A (en) * 1973-06-15 1975-02-25
JPS50132934A (en) * 1974-04-05 1975-10-21

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017850A (en) * 1973-06-15 1975-02-25
JPS50132934A (en) * 1974-04-05 1975-10-21

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188085A2 (en) * 1985-01-09 1986-07-23 Stc Plc Optical fibre transmission systems
EP0188085A3 (en) * 1985-01-09 1988-08-10 Stc Plc Optical fibre transmission systems
US5748813A (en) * 1992-07-28 1998-05-05 British Telecommunications Pubic Limited Company Free space optical communication system

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