JPS55146409A - Photo coupling device - Google Patents

Photo coupling device

Info

Publication number
JPS55146409A
JPS55146409A JP5428779A JP5428779A JPS55146409A JP S55146409 A JPS55146409 A JP S55146409A JP 5428779 A JP5428779 A JP 5428779A JP 5428779 A JP5428779 A JP 5428779A JP S55146409 A JPS55146409 A JP S55146409A
Authority
JP
Japan
Prior art keywords
light emitting
optical
fiber
optical fiber
radius
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
JP5428779A
Other languages
Japanese (ja)
Inventor
Yuji Hamazaki
Seiichi Takeuchi
Masaaki Kato
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP5428779A priority Critical patent/JPS55146409A/en
Publication of JPS55146409A publication Critical patent/JPS55146409A/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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/421—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical component consisting of a short length of fibre, e.g. fibre stub
    • 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
    • G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

PURPOSE:To improve coupling efficiency and reliability by reducing the outside diameter of the end part of the photo detecting part of a guide fiber and forming the end to spherical shape in the photo coupling device in which a light emitting diode and an optical fiber are coupled by way of an optcial guide fiber. CONSTITUTION:An optical guide fiber 11 of a diameter larger than that of an optical fiber 13 is provided between the light emitting part 8 of a light emitting diode 7 and optical fiber 13 and is connected to the optical fiber 13 by means of a connector 12. The end part of said optical fiber 11 opposing to the light emitting part 8 is made smaller in outside diameter and is formed to the shape which has the optical radius determined by the diameter of the light emitting part 8 and the refractive index, etc. of the core 15 and clad 16 at said end. In the case where the end part of the optical guide fiber is not reduced, the radius of the sphere at the end must be made larger than the radius of the guide fiber and therefore it does not become optimum radius. Hence, the above-mentioned method improves the coupling efficiency and improves reliability as well becuase of the absence of any moving parts such as lenses.
JP5428779A 1979-05-02 1979-05-02 Photo coupling device Pending JPS55146409A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5428779A JPS55146409A (en) 1979-05-02 1979-05-02 Photo coupling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5428779A JPS55146409A (en) 1979-05-02 1979-05-02 Photo coupling device

Publications (1)

Publication Number Publication Date
JPS55146409A true JPS55146409A (en) 1980-11-14

Family

ID=12966340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5428779A Pending JPS55146409A (en) 1979-05-02 1979-05-02 Photo coupling device

Country Status (1)

Country Link
JP (1) JPS55146409A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4979972A (en) * 1989-07-17 1990-12-25 Corning Incorporated Method of making fiber optic couplers
US4983195A (en) * 1990-01-04 1991-01-08 Corning Incorporated Method of making fiber optic coupler with longitudinal protrusions

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5419385A (en) * 1977-07-14 1979-02-14 Sumitomo Electric Ind Ltd Semiconductor light emitting device
JPS5420747A (en) * 1977-07-15 1979-02-16 Hitachi Ltd Photo coupling element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5419385A (en) * 1977-07-14 1979-02-14 Sumitomo Electric Ind Ltd Semiconductor light emitting device
JPS5420747A (en) * 1977-07-15 1979-02-16 Hitachi Ltd Photo coupling element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4979972A (en) * 1989-07-17 1990-12-25 Corning Incorporated Method of making fiber optic couplers
US4983195A (en) * 1990-01-04 1991-01-08 Corning Incorporated Method of making fiber optic coupler with longitudinal protrusions

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