JPS5643787A - Semiconductor laser beam isolator - Google Patents

Semiconductor laser beam isolator

Info

Publication number
JPS5643787A
JPS5643787A JP11908179A JP11908179A JPS5643787A JP S5643787 A JPS5643787 A JP S5643787A JP 11908179 A JP11908179 A JP 11908179A JP 11908179 A JP11908179 A JP 11908179A JP S5643787 A JPS5643787 A JP S5643787A
Authority
JP
Japan
Prior art keywords
light
straight
polarizing
polarizing element
semiconductor laser
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
JP11908179A
Other languages
Japanese (ja)
Inventor
Takao Matsumoto
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.)
NTT Inc
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 JP11908179A priority Critical patent/JPS5643787A/en
Publication of JPS5643787A publication Critical patent/JPS5643787A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/09—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on magneto-optical elements, e.g. exhibiting Faraday effect
    • G02F1/093—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on magneto-optical elements, e.g. exhibiting Faraday effect used as non-reciprocal devices, e.g. optical isolators, circulators

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)

Abstract

PURPOSE:To achieve a compact size and a lower cost by arranging a nonreversible polarizing rotating element and one polarizing element utilizing a straight plarization of a semiconductor laser output. CONSTITUTION:Light L1 straight polarized from a semiconductor laser 1 directly enters a nonreversile polarizing rotating element not by way of a polarizing element so as to turn by 45 deg. in the direction of advance. Then, the light straight polarized thus obtained is passes through a polarizing element 4 turned by 45 deg. to make an optical communication beam as a light L4, straight polarized. The reflected light L5, of the light L4, passes through the polarizing element 4 as the light L6, of straight polarization only in the component equivalent to the polarization in the same directions as the light L3, and thus results in the light L7, of straight polarization turned by 90 deg. with respect to the light L1. This assures a stable action without trouble since L7, entering the laser 1 is turned by 90 deg. with respect to the light L1. Only use of one polarizing element enables compact size and lower cost.
JP11908179A 1979-09-17 1979-09-17 Semiconductor laser beam isolator Pending JPS5643787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11908179A JPS5643787A (en) 1979-09-17 1979-09-17 Semiconductor laser beam isolator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11908179A JPS5643787A (en) 1979-09-17 1979-09-17 Semiconductor laser beam isolator

Publications (1)

Publication Number Publication Date
JPS5643787A true JPS5643787A (en) 1981-04-22

Family

ID=14752400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11908179A Pending JPS5643787A (en) 1979-09-17 1979-09-17 Semiconductor laser beam isolator

Country Status (1)

Country Link
JP (1) JPS5643787A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0219113U (en) * 1988-07-25 1990-02-08
US4935932A (en) * 1988-08-15 1990-06-19 Spectra-Physics, Inc. Apparatus using induced birefringence to improve laser beam quality
JPH05175274A (en) * 1991-12-26 1993-07-13 Matsushita Electric Ind Co Ltd Chip component

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057502A (en) * 1973-09-20 1975-05-20
JPS51116689A (en) * 1975-04-05 1976-10-14 Nec Corp Semiconductor laser device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5057502A (en) * 1973-09-20 1975-05-20
JPS51116689A (en) * 1975-04-05 1976-10-14 Nec Corp Semiconductor laser device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0219113U (en) * 1988-07-25 1990-02-08
US4935932A (en) * 1988-08-15 1990-06-19 Spectra-Physics, Inc. Apparatus using induced birefringence to improve laser beam quality
JPH05175274A (en) * 1991-12-26 1993-07-13 Matsushita Electric Ind Co Ltd Chip component

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