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JPS57168221A - Optical switch - Google Patents

Optical switch

Info

Publication number
JPS57168221A
JPS57168221A JP5330781A JP5330781A JPS57168221A JP S57168221 A JPS57168221 A JP S57168221A JP 5330781 A JP5330781 A JP 5330781A JP 5330781 A JP5330781 A JP 5330781A JP S57168221 A JPS57168221 A JP S57168221A
Authority
JP
Japan
Prior art keywords
polarization
beams
rotator
reflected
light
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
JP5330781A
Other languages
Japanese (ja)
Inventor
Masataka Shirasaki
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 JP5330781A priority Critical patent/JPS57168221A/en
Publication of JPS57168221A publication Critical patent/JPS57168221A/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

Landscapes

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

Abstract

PURPOSE:To drive an optical switch easily by a small magnetic field by using a 45 deg. Faraday rotator thin plate with a phase matching film and a 45 deg. rotary polarizer in combination as a polarization plane converting element. CONSTITUTION:Incident light beams 1 and 2 are separated by a polarizing and separating element 3, and the transmitted and reflected beams are passed through Faraday rotators 4 and 4' to rotate their planes of polarization by +45 deg. or -45 deg.; and they are passed through 45 deg. rotary polarizers 5 and 5' to further rotate the planes of polarization by 45 deg., and then caused to illuminate wedge- shaped polarizing and separating elements 6 and 6' which reflect two orthogonal polarized beams in slightly different directions. Since the reflected light beams pass through the 45 deg. rotary polarizers 5 and 5' and 45 deg. Faraday rotators 4 and 4', they are polarized light beam crossing the original light beams at right angles. Therefore, the light 7 from the rotator 4 is transmitted and the light 8 from the rotator 4' is reflected, eliminating polarization dependency. The magnetization of the Faraday rotators is inverted, and thus the switching of luminous flux to A or B is possible.
JP5330781A 1981-04-09 1981-04-09 Optical switch Pending JPS57168221A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5330781A JPS57168221A (en) 1981-04-09 1981-04-09 Optical switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5330781A JPS57168221A (en) 1981-04-09 1981-04-09 Optical switch

Publications (1)

Publication Number Publication Date
JPS57168221A true JPS57168221A (en) 1982-10-16

Family

ID=12939059

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5330781A Pending JPS57168221A (en) 1981-04-09 1981-04-09 Optical switch

Country Status (1)

Country Link
JP (1) JPS57168221A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5812304A (en) * 1995-08-29 1998-09-22 Fujitsu Limited Faraday rotator which generates a uniform magnetic field in a magnetic optical element
US5844710A (en) * 1996-09-18 1998-12-01 Fujitsu Limited Faraday rotator and optical device employing the same
US5867300A (en) * 1996-03-01 1999-02-02 Fujitsu Limited Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal
US5889609A (en) * 1992-07-31 1999-03-30 Fujitsu Limited Optical attenuator
US6018411A (en) * 1996-11-29 2000-01-25 Fujitsu Limited Optical device utilizing magneto-optical effect
US6441955B1 (en) 1998-02-27 2002-08-27 Fujitsu Limited Light wavelength-multiplexing systems
US6496300B2 (en) 1998-02-27 2002-12-17 Fujitsu Limited Optical amplifier

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6018412A (en) * 1992-07-31 2000-01-25 Fujitsu Limited Optical attenuator
US6275323B1 (en) 1992-07-31 2001-08-14 Fujitsu Limited Optical attenuator
US5889609A (en) * 1992-07-31 1999-03-30 Fujitsu Limited Optical attenuator
US5812304A (en) * 1995-08-29 1998-09-22 Fujitsu Limited Faraday rotator which generates a uniform magnetic field in a magnetic optical element
US5973821A (en) * 1996-03-01 1999-10-26 Fujitsu Limited Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of light signal
US5867300A (en) * 1996-03-01 1999-02-02 Fujitsu Limited Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal
US6333806B1 (en) 1996-03-01 2001-12-25 Fujitsu Limited Variable optical attenuator which applies a magnetic field to a Faraday element to rotate the polarization of a light signal
US6570699B2 (en) 1996-03-01 2003-05-27 Fujitsu Limited Variable optical attenuator which applies a magnetic field to a Faraday element to rotate the polarization of a light signal
US6717713B2 (en) 1996-03-01 2004-04-06 Fujitsu Limited Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal
US5844710A (en) * 1996-09-18 1998-12-01 Fujitsu Limited Faraday rotator and optical device employing the same
US6018411A (en) * 1996-11-29 2000-01-25 Fujitsu Limited Optical device utilizing magneto-optical effect
US6496300B2 (en) 1998-02-27 2002-12-17 Fujitsu Limited Optical amplifier
US6441955B1 (en) 1998-02-27 2002-08-27 Fujitsu Limited Light wavelength-multiplexing systems
US6919987B2 (en) 1998-02-27 2005-07-19 Fujitsu Limited Light wavelength-multiplexing systems

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