JPS5794715A - Optical switch - Google Patents
Optical switchInfo
- Publication number
- JPS5794715A JPS5794715A JP17171280A JP17171280A JPS5794715A JP S5794715 A JPS5794715 A JP S5794715A JP 17171280 A JP17171280 A JP 17171280A JP 17171280 A JP17171280 A JP 17171280A JP S5794715 A JPS5794715 A JP S5794715A
- Authority
- JP
- Japan
- Prior art keywords
- polarization
- beams
- separating element
- rotor
- pass
- 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
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
- G02F1/29—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 position or the direction of light beams, i.e. deflection
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
PURPOSE:To reduce a crosstalk, by installing a polarization surface separating element and a wedge-shaped polarizing and separating element whose refractive direction is different by polarization, before and behind a polarization surface converting element. CONSTITUTION:An incident light beam is divided by a polarization separating element 21, a transmission light beam and a reflected light beam are made to pass through Faraday rotors 22, 22', respectively, rotate the polarization surface by +45 deg. or -45 deg., and after that, are made incident to wedgelike polarizing and separating elements 23, 23' for reflecting the light beams in the direction being a little different from the 2 polarization surfaces meeting at right angles. The reflected rays from the polarizing and separating elements 23, 23' are made to pass through the Faraday rotors 22, 22' once again, are rotated by +45 deg. or -45 deg. in the same direction, and projected light beams of the rotors 22, 22' become polarized beams meeting at right angles to original beams, therefore, in the inside of the separating element 21, light beams from the rotor 22 transmits and loght beams from the rotor 22' are reflected, and they advance to 24 or 24'. Whether the light beams pass through the optical path 24 or 24' depends on the direction of a magnetic field applied to the Faraday rotor, therefore, it is switched by the direction control of a magnetic field.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17171280A JPS5794715A (en) | 1980-12-05 | 1980-12-05 | Optical switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17171280A JPS5794715A (en) | 1980-12-05 | 1980-12-05 | Optical switch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5794715A true JPS5794715A (en) | 1982-06-12 |
Family
ID=15928273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17171280A Pending JPS5794715A (en) | 1980-12-05 | 1980-12-05 | Optical switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5794715A (en) |
Cited By (7)
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 |
-
1980
- 1980-12-05 JP JP17171280A patent/JPS5794715A/en active Pending
Cited By (14)
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 |
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 |
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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