JPS57188014A - Optical switch - Google Patents

Optical switch

Info

Publication number
JPS57188014A
JPS57188014A JP7308781A JP7308781A JPS57188014A JP S57188014 A JPS57188014 A JP S57188014A JP 7308781 A JP7308781 A JP 7308781A JP 7308781 A JP7308781 A JP 7308781A JP S57188014 A JPS57188014 A JP S57188014A
Authority
JP
Japan
Prior art keywords
magnetic field
single mode
low magnetic
optical switch
lens
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
JP7308781A
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 JP7308781A priority Critical patent/JPS57188014A/en
Publication of JPS57188014A publication Critical patent/JPS57188014A/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

Abstract

PURPOSE:To obtain an optical switch having a high speed and high reliability with use of a crystal requiring no phase matching film, etc., by changing the input and output directions of a single mode beam waist by means of a Faraday rotor which is driven by a low magnetic field. CONSTITUTION:The beam radiated from a single mode optical fiber 25 is made incident to a thin plate 21 of YIG forming a low magnetic field-driven Faraday rotor via a didimensional lens 24 and a unidimensional lens 23 like a cylindrical lens, etc. A beam waist 22 passed through the plate 21 is turned into an output beam which is delivered in different directions in accordance with the direction of a low magnetic field that drives the plate 1. Then switching is carried out for the incident beam path to an output system optical fiber 25 that passes through lenses 23 and 24, etc. similar to the incident system. Thus an electrooptic crystal having high working voltage and low reliability, a phase matching film to be used to the crystal surface where the mode change, etc. is caused, etc. are eliminated. As a result, a single mode optical switch having a high speed and high reliability can be obtained.
JP7308781A 1981-05-15 1981-05-15 Optical switch Pending JPS57188014A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7308781A JPS57188014A (en) 1981-05-15 1981-05-15 Optical switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7308781A JPS57188014A (en) 1981-05-15 1981-05-15 Optical switch

Publications (1)

Publication Number Publication Date
JPS57188014A true JPS57188014A (en) 1982-11-18

Family

ID=13508196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7308781A Pending JPS57188014A (en) 1981-05-15 1981-05-15 Optical switch

Country Status (1)

Country Link
JP (1) JPS57188014A (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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934844A (en) * 1972-07-29 1974-03-30
JPS4999052A (en) * 1973-01-26 1974-09-19

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934844A (en) * 1972-07-29 1974-03-30
JPS4999052A (en) * 1973-01-26 1974-09-19

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5889609A (en) * 1992-07-31 1999-03-30 Fujitsu Limited Optical attenuator
US6018412A (en) * 1992-07-31 2000-01-25 Fujitsu Limited Optical attenuator
US6275323B1 (en) 1992-07-31 2001-08-14 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
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
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
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
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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