JPS5533127A - Photo coupler - Google Patents

Photo coupler

Info

Publication number
JPS5533127A
JPS5533127A JP10610078A JP10610078A JPS5533127A JP S5533127 A JPS5533127 A JP S5533127A JP 10610078 A JP10610078 A JP 10610078A JP 10610078 A JP10610078 A JP 10610078A JP S5533127 A JPS5533127 A JP S5533127A
Authority
JP
Japan
Prior art keywords
lambda
semiconductor laser
light
reflected light
serration
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
JP10610078A
Other languages
Japanese (ja)
Other versions
JPH0230002B2 (en
Inventor
Shigefumi Masuda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10610078A priority Critical patent/JPS5533127A/en
Publication of JPS5533127A publication Critical patent/JPS5533127A/en
Publication of JPH0230002B2 publication Critical patent/JPH0230002B2/ja
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
    • G02B6/24—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
    • G02B6/4206—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
    • G02B6/42—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)
  • Optical Couplings Of Light Guides (AREA)
  • Light Receiving Elements (AREA)

Abstract

PURPOSE:To remove the effect of reflected light and perform stable laser oscillation by so forming a serration to a lens or optical fiber as to give a phase difference to the half of coherent light thereby performing photo coupling. CONSTITUTION:This is photo coupler constituted by a semiconductor laser 1, optical fibers 3, 5 and lenses 4, 2, wherein a serration D whose upper half and lower half are lambda/4 is formed to the lens 4 or optical fiber 5. (lambda is the wavelength of the output light of the semiconductor laser 1.) Hence, the light entered from the semiconductor laser 1 via lenses 4, 2 to the semiconductor lasers 3, 5 becomes of a phase difference of lambda/4 in the upper and lower halves and the reflected light thereof become lambda/2 in the upper and lower halves, resulting in that they mutually negate. Hence, the effect that the reflected light gives to the operation of the semiconductor laser 1 may be eliminated.
JP10610078A 1978-08-30 1978-08-30 Photo coupler Granted JPS5533127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10610078A JPS5533127A (en) 1978-08-30 1978-08-30 Photo coupler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10610078A JPS5533127A (en) 1978-08-30 1978-08-30 Photo coupler

Publications (2)

Publication Number Publication Date
JPS5533127A true JPS5533127A (en) 1980-03-08
JPH0230002B2 JPH0230002B2 (en) 1990-07-04

Family

ID=14425091

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10610078A Granted JPS5533127A (en) 1978-08-30 1978-08-30 Photo coupler

Country Status (1)

Country Link
JP (1) JPS5533127A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4815806A (en) * 1987-12-04 1989-03-28 Coherent, Inc. Stabilized laser fiber launcher
JP2013167760A (en) * 2012-02-15 2013-08-29 Sumitomo Electric Ind Ltd Wavelength selection optical switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4815806A (en) * 1987-12-04 1989-03-28 Coherent, Inc. Stabilized laser fiber launcher
JP2013167760A (en) * 2012-02-15 2013-08-29 Sumitomo Electric Ind Ltd Wavelength selection optical switch

Also Published As

Publication number Publication date
JPH0230002B2 (en) 1990-07-04

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