JPS5722220A - Optical filter - Google Patents

Optical filter

Info

Publication number
JPS5722220A
JPS5722220A JP9792580A JP9792580A JPS5722220A JP S5722220 A JPS5722220 A JP S5722220A JP 9792580 A JP9792580 A JP 9792580A JP 9792580 A JP9792580 A JP 9792580A JP S5722220 A JPS5722220 A JP S5722220A
Authority
JP
Japan
Prior art keywords
crystals
transmitted light
polarization
disposed
central wavelength
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
JP9792580A
Other languages
Japanese (ja)
Inventor
Osamu Kamata
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP9792580A priority Critical patent/JPS5722220A/en
Publication of JPS5722220A publication Critical patent/JPS5722220A/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 make the central wavelength of transmitted light changeable by disposing magneto- optic crystals having specific thickness ratios and polarizers alternately in a longitudinal direction and applying variable magnetic fields on the top and bottem surfaces thereof in the titled filter used form optical communication fields and the like. CONSTITUTION:With the thickness of a magneto-optic crystal 1 defined as l1, and the thicknesses of said crystals 2-6 next to this defined as 2l1-6l1 respectively, the crystals 1-6 are disposed between polarizers 7-12 of which the planes of polarization are paralleled to each other and which are disposed in parallel, thence electromagnets 14, 16 of variable electric currents are disposed on the top and bottom surfaces of the crystals 1-6, whereby an optical filter is formed. When the incident light of linearly polarized waves is made incident perpendicularly from one side of the polarizer 7, the plane of polarization of the transmitted light is rotated by Faraday effect. Therefore, if the angle of rotation of polarization is taken at pi with respect to the crystal 1 at the time when incident light 16 having various wavelengths is made incident, the angle of rotation is integer times the pi with respect to the remaining crystals 2-6. Thereby, the central wavelength of transmitted light 17 is determined and if the intensity of magnetic fields is changed, the central wavelength of the transmitted light 17 is changed.
JP9792580A 1980-07-16 1980-07-16 Optical filter Pending JPS5722220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9792580A JPS5722220A (en) 1980-07-16 1980-07-16 Optical filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9792580A JPS5722220A (en) 1980-07-16 1980-07-16 Optical filter

Publications (1)

Publication Number Publication Date
JPS5722220A true JPS5722220A (en) 1982-02-05

Family

ID=14205253

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9792580A Pending JPS5722220A (en) 1980-07-16 1980-07-16 Optical filter

Country Status (1)

Country Link
JP (1) JPS5722220A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08162540A (en) * 1991-11-21 1996-06-21 Nec Corp Semiconductor device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08162540A (en) * 1991-11-21 1996-06-21 Nec Corp Semiconductor device

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