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JPS5778002A - Optical isolator - Google Patents

Optical isolator

Info

Publication number
JPS5778002A
JPS5778002A JP55153779A JP15377980A JPS5778002A JP S5778002 A JPS5778002 A JP S5778002A JP 55153779 A JP55153779 A JP 55153779A JP 15377980 A JP15377980 A JP 15377980A JP S5778002 A JPS5778002 A JP S5778002A
Authority
JP
Japan
Prior art keywords
fiber
tapered section
optical
laser
stuck
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
JP55153779A
Other languages
Japanese (ja)
Inventor
Shigeru Oshima
Takeshi Koseki
Toshifumi Tamura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55153779A priority Critical patent/JPS5778002A/en
Publication of JPS5778002A publication Critical patent/JPS5778002A/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
    • G02B6/4202—Packages, e.g. shape, construction, internal or external details for coupling an active element with fibres without intermediate optical elements, e.g. fibres with plane ends, fibres with shaped ends, bundles
    • G02B6/4203—Optical features
    • 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
    • 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
    • G02B6/4207—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

PURPOSE:To reduce the size of optical isolators, by longitudinally connecting the second and third optical fibers, each of which has a different refractive index distribution, to the optical fiber which is stuck a light absorbing substance on the side face of the tapered section and forms a spherical lens at the front end of the tapered section. CONSTITUTION:A converged type (GI) fiber 13 has a tapered section 17 and a light absorbing substance 12 is stuck on the side face of the tapered section 17. Moreover, at the front end of the tapered section 17, a spherical lens 16 is formed to make optical couplings with a semiconductor laser 11. Beams emitted from the laser 11 are converged into the core of the tapered section 17 by a lens 16. The lower grade mode light of the fiber 13 passes through a stepped index (SI) fiber 14, and is made incident the GI fiber 15. In the fiber 15, all modes are energized and the beam from the laser 11 behaves as shown by the solid line. A part of the beam is reflected by an end face of fiber 18 and proceeds as shown by the broken line. The reflected beam which proceeds along the broken line runs out from the core in the tapered section 17 and is absorbed by the substance 12. In this way, the fiber 14 is formed to have a diameter of several mm., and a sufficient isolation can be obtained.
JP55153779A 1980-11-04 1980-11-04 Optical isolator Pending JPS5778002A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55153779A JPS5778002A (en) 1980-11-04 1980-11-04 Optical isolator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55153779A JPS5778002A (en) 1980-11-04 1980-11-04 Optical isolator

Publications (1)

Publication Number Publication Date
JPS5778002A true JPS5778002A (en) 1982-05-15

Family

ID=15569947

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55153779A Pending JPS5778002A (en) 1980-11-04 1980-11-04 Optical isolator

Country Status (1)

Country Link
JP (1) JPS5778002A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575181A (en) * 1983-04-26 1986-03-11 Tokyo Shibaura Denki Kabushiki Kaisha Optical fiber assembly with cladding light scattering means
WO1997048994A1 (en) * 1996-06-21 1997-12-24 Kabushiki Gaisha Inter Action Sensing optical fiber and sensor system
JP2015175958A (en) * 2014-03-14 2015-10-05 浜松ホトニクス株式会社 Semiconductor laser module, semiconductor laser light source, and semiconductor laser system
JP2018136550A (en) * 2011-06-27 2018-08-30 学校法人慶應義塾 Optical waveguide
WO2019167959A1 (en) * 2018-02-27 2019-09-06 アダマンド並木精密宝石株式会社 Mode controller

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575181A (en) * 1983-04-26 1986-03-11 Tokyo Shibaura Denki Kabushiki Kaisha Optical fiber assembly with cladding light scattering means
WO1997048994A1 (en) * 1996-06-21 1997-12-24 Kabushiki Gaisha Inter Action Sensing optical fiber and sensor system
US6449400B1 (en) 1996-06-21 2002-09-10 Kabushiki Gaisha Inter Action Sensing optical fiber and sensor system
JP2018136550A (en) * 2011-06-27 2018-08-30 学校法人慶應義塾 Optical waveguide
JP2015175958A (en) * 2014-03-14 2015-10-05 浜松ホトニクス株式会社 Semiconductor laser module, semiconductor laser light source, and semiconductor laser system
WO2019167959A1 (en) * 2018-02-27 2019-09-06 アダマンド並木精密宝石株式会社 Mode controller
GB2585781A (en) * 2018-02-27 2021-01-20 Adamant Namiki Prec Jewel Co Ltd Mode controller
JPWO2019167959A1 (en) * 2018-02-27 2021-03-04 アダマンド並木精密宝石株式会社 Mode controller
GB2585781B (en) * 2018-02-27 2021-12-15 Adamant Namiki Prec Jewel Co Ltd Mode controller
US11340397B2 (en) 2018-02-27 2022-05-24 Adamant Namiki Precision Jewel Co., Ltd. Mode controller

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