WO2003069395A2 - Magneto-optisches verfahren zur änderung des polarisationszustandes von licht und zugehörige vorrichtung - Google Patents
Magneto-optisches verfahren zur änderung des polarisationszustandes von licht und zugehörige vorrichtung Download PDFInfo
- Publication number
- WO2003069395A2 WO2003069395A2 PCT/AT2003/000042 AT0300042W WO03069395A2 WO 2003069395 A2 WO2003069395 A2 WO 2003069395A2 AT 0300042 W AT0300042 W AT 0300042W WO 03069395 A2 WO03069395 A2 WO 03069395A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crystal
- magnetic field
- pulse
- light
- state
- Prior art date
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
- G02F1/11—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 acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves
-
- 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
- G02F1/092—Operation of the cell; Circuit arrangements
-
- 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
- G02F1/0136—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 for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation
Definitions
- the invention relates to a method for changing the polarization state of light with a magnetically uniaxial crystal which changes into a single-domain state under the action of an external magnetic field pulse, light passing through predetermined regions of the crystal, and to a device for carrying out such a method.
- the subject of the invention is therefore methods and devices for changing the polarization of light beams and subsequently for changing the direction, the intensity and the like. More of these light beams, as are used in optical communication systems, information processing, displays etc.
- MEMS microelectromechanical systems
- acoustic-optical liquid crystalline
- electronically switchable Bragg gmtings Bragg grids
- bubblejets bubblejets
- thermo-optical interferometric
- thermo-capillary thermo-capillary
- electro-holographic and magneto-optical systems Numerous types of optical switches have been developed, including microelectromechanical systems (MEMS), acoustic-optical, liquid crystalline, electronically switchable Bragg gmtings (Bragg grids), bubblejets (bubble systems), thermo-optical, interferometric, thermo-capillary, electro-holographic and magneto-optical systems.
- MEMS microelectromechanical systems
- acoustic-optical liquid crystalline
- electronically switchable Bragg gmtings Bragg grids
- bubblejets bubblejets
- thermo-optical interferometric
- thermo-capillary thermo-capillary
- electro-holographic and magneto-optical systems thermo-opti
- Electro-optical systems have comparatively much shorter switching times; for example, the switching time of the new electro-holographic switches is only approx. 10 ns. But these circuits need permanent energy supply, at least in one state. In addition, the insertion loss of electroholographic switches is quite high, namely around 4-5 dB.
- Magneto-optical systems open up the possibility of combining short switching times and low insertion loss with the so-called “latching” mode of operation (see above).
- a multistable polarization rotator is described. Stable states in this Rotators are predetermined by inhomogeneities on the surfaces of orthoferritic platelets that cover the domain walls (DWs) Hold layers, guaranteed. Transitions between these stable states result from the shifting of the domain walls between these positions and take place without the creation of new domains. The time required for these transitions is approximately 100 ns, which means that they are several thousand times faster than for other optical switches of the "latching" type. However, the aperture of the switch is considerably restricted. The amplitude of the driver magnetic field is fairly small, which is why DWs can only travel at comparatively small distances.
- the object of the invention is to reduce the restrictions on the aperture of the switch.
- this is achieved in that a magnetic field pulse with a magnetic field strength (H) is applied to the crystal, in which the crystal does not remain in the signal domain state after the end of the pulse, but in a defined, from the direction of the applied Magnetic field returns certain multi-domain state.
- H magnetic field strength
- This increases the aperture of the switch by using higher amplitude magnetic field pulses.
- the aperture is defined by the zone in which magnetic pulses alternate. In the present invention, this zone represents the domain structure that occurs after the magnetic pulse is turned off. In orthoferrites, relatively large domains occur, which means that large switch apertures can also be reached.
- Orthoferrites have a rectangular hysteresis function.
- the coercive force of the Orthoferrite is quite high, it is a few kilo-oersted (kOe).
- the force required to overcome the coercive force generation 'high magnetic fields requires large energy input (this factor is particularly important for construction of densely packed switch matrices of importance) and can also increase the inductance of the scheme lead to, which increases the switching times.
- inhomogeneities on the crystal surface are used, which fix the domain walls in predetermined positions. If the distance between the inhomogeneities is small, or if thin orthoferrite flakes are used, the DW's move continuously from one dissimilarity to another.
- the last refers to the thickness »100 ⁇ m, used for polarization rotation in the visible and near infrared spectrum range. It was found that with thicker patterns, namely at> 1.2 mm thick yttrium orthoferrite crystals, which are responsible for 45 ° polarization rotation on the wavelengths> 1.3 ⁇ m are used, other situation is.
- the magnetization directions in certain crystal areas are changed to opposite:
- the DWs are oriented perpendicular to the direction of the crystallographic ⁇ -axis, see Fig. 1.
- the magnetizations are positive in the upper and lower domains and negative in the middle domains (Fig. La).
- a magnetic field pulse of negative polarity now acts on the crystal. If the amplitude of the pulse is approximately H s , the crystal is magnetized to the single domain state, Fig. Ib. After the end of the pulse, the crystal is divided into the domains, Fig. Lc.
- the polarization of the rays that pass through area 1 is “+” (that is, the direction of polarization has rotated clockwise) and the polarization of the rays that pass through area 2 is “-” "(the direction of polarization has rotated counterclockwise).
- a magnetic field pulse of negative polarity is applied, the polarization of the two beams will be “minus” during the pulse.
- the polarization of beams 1 and 2 will accordingly become “-” (for 1) and "+” (for 2
- the application of a magnetic field pulse of positive polarity leads to the new distribution: "+” and “+” and after the termination of this pulse the state "+” and "-” is created again.
- the polarity and the duration achieve a desired polarization distribution or combination at selected time intervals.
- Patent No. 408,700 uses irregularities (such as scratches) on the crystal surface through which the light rays pass to fix the DWs. These inhomogeneities on the surface cause light scattering, which is particularly troublesome when such crystals are used in attenuators.
- the inhomogeneities are applied to the side surface or the crystal.
- Fig. 2 shows such inhomogeneities in the form of scratches or scratches on the side surface of a rotator. The direction of the scratches or scratches is perpendicular to the crystallographic ⁇ -axis and parallel to the planes of the DWs.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IL16351603A IL163516A0 (en) | 2002-02-12 | 2003-02-12 | Method and device for modifying the polarisation state of light |
EP03704088A EP1474722A2 (de) | 2002-02-12 | 2003-02-12 | Magneto-optisches verfahren zur änderung des polarisationszustandes von licht und zugehörige vorrichtung |
AU2003206487A AU2003206487A1 (en) | 2002-02-12 | 2003-02-12 | Method and device for modifying the polarisation state of light |
CA002475203A CA2475203A1 (en) | 2002-02-12 | 2003-02-12 | Method and device for modifying the polarisation state of light |
US10/504,130 US7158301B2 (en) | 2002-02-12 | 2003-02-12 | Method and device for modifying the polarization state of light |
MXPA04007814A MXPA04007814A (es) | 2002-02-12 | 2003-02-12 | Metodo y dispositivo para modificar el estado de polarizacion de la luz. |
KR10-2004-7012476A KR20040089623A (ko) | 2002-02-12 | 2003-02-12 | 광의 분극상태를 수정하기 위한 공정 및 장치 |
JP2003568460A JP2005517977A (ja) | 2002-02-12 | 2003-02-12 | 光の偏光状態を変化させる方法および装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA216/2002 | 2002-02-12 | ||
AT0021602A AT411852B (de) | 2002-02-12 | 2002-02-12 | Verfahren und vorrichtung zur änderung des polarisationszustandes von licht mit einem magnetisch einachsigen kristall |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003069395A2 true WO2003069395A2 (de) | 2003-08-21 |
WO2003069395A3 WO2003069395A3 (de) | 2003-12-18 |
Family
ID=27671426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2003/000042 WO2003069395A2 (de) | 2002-02-12 | 2003-02-12 | Magneto-optisches verfahren zur änderung des polarisationszustandes von licht und zugehörige vorrichtung |
Country Status (13)
Country | Link |
---|---|
US (1) | US7158301B2 (de) |
EP (1) | EP1474722A2 (de) |
JP (1) | JP2005517977A (de) |
KR (1) | KR20040089623A (de) |
CN (1) | CN100397148C (de) |
AT (1) | AT411852B (de) |
AU (1) | AU2003206487A1 (de) |
CA (1) | CA2475203A1 (de) |
MX (1) | MXPA04007814A (de) |
PL (1) | PL370581A1 (de) |
RU (1) | RU2303801C2 (de) |
WO (1) | WO2003069395A2 (de) |
ZA (1) | ZA200407272B (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT501111A1 (de) * | 2004-12-09 | 2006-06-15 | Univ Wien Tech | Verfahren und vorrichtung zur änderung des polarisationszustandes von licht |
US9150629B2 (en) | 2013-03-14 | 2015-10-06 | Daiichi Sankyo Co., Ltd. | Human tear lipocalins which bind PCSK9 and methods of use thereof |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2613943C1 (ru) * | 2015-12-14 | 2017-03-22 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" | Акустооптический преобразователь поляризации лазерного излучения (варианты) |
Citations (5)
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US3526883A (en) * | 1968-10-09 | 1970-09-01 | Bell Telephone Labor Inc | Magnetic domain display device |
US4220395A (en) * | 1974-05-13 | 1980-09-02 | Regents Of University Of California | Polarization converter and circuit elements for use in optical waveguides |
US4495492A (en) * | 1982-05-05 | 1985-01-22 | Litton Systems, Inc. | Magneto-optic chip with gray-scale capability |
US5344720A (en) * | 1991-11-08 | 1994-09-06 | Litton Systems, Inc. | Bistable magneto-optic single crystal films and method of producing same utilizing controlled defect introduction |
WO2001020390A1 (de) * | 1999-09-15 | 2001-03-22 | Didosyan Juri S | Magnetooptisches schaltelement mit einem faraday-rotator |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US3831156A (en) * | 1971-12-06 | 1974-08-20 | Hughes Aircraft Co | Biasing apparatus for magnetic domain stores |
US4550983A (en) * | 1983-05-09 | 1985-11-05 | Litton Systems, Inc. | Magneto-optic device for the control of electromagnetic radiation |
US4893910A (en) * | 1988-03-16 | 1990-01-16 | Hewlett-Packard Company | Magneto-optical recording system having medium with domainless control layer |
US5192862A (en) * | 1991-12-19 | 1993-03-09 | Simmonds Precision Products, Inc. | Polarizerless magneto-optic speed and torque sensor |
DE69320398T2 (de) * | 1992-05-08 | 1999-05-06 | Mitsubishi Gas Chemical Co., Inc., Tokio/Tokyo | Magnetooptischer Sensorkopf |
JPH07104225A (ja) * | 1993-10-05 | 1995-04-21 | Mitsubishi Gas Chem Co Inc | ファラデー回転子 |
US5473466A (en) * | 1994-06-02 | 1995-12-05 | Tanielian; Aram A. | Magneto-optical display and method of forming such display |
US5703710A (en) * | 1994-09-09 | 1997-12-30 | Deacon Research | Method for manipulating optical energy using poled structure |
US5801875A (en) * | 1995-07-05 | 1998-09-01 | Lucent Technologies Inc. | Article comprising a magneto-optic material having low magnetic moment |
-
2002
- 2002-02-12 AT AT0021602A patent/AT411852B/de not_active IP Right Cessation
-
2003
- 2003-02-12 CN CNB038037858A patent/CN100397148C/zh not_active Expired - Fee Related
- 2003-02-12 MX MXPA04007814A patent/MXPA04007814A/es unknown
- 2003-02-12 JP JP2003568460A patent/JP2005517977A/ja active Pending
- 2003-02-12 EP EP03704088A patent/EP1474722A2/de not_active Withdrawn
- 2003-02-12 KR KR10-2004-7012476A patent/KR20040089623A/ko not_active Application Discontinuation
- 2003-02-12 PL PL03370581A patent/PL370581A1/xx not_active Application Discontinuation
- 2003-02-12 AU AU2003206487A patent/AU2003206487A1/en not_active Abandoned
- 2003-02-12 WO PCT/AT2003/000042 patent/WO2003069395A2/de active Application Filing
- 2003-02-12 RU RU2004127230/28A patent/RU2303801C2/ru not_active IP Right Cessation
- 2003-02-12 CA CA002475203A patent/CA2475203A1/en not_active Abandoned
- 2003-02-12 US US10/504,130 patent/US7158301B2/en not_active Expired - Fee Related
-
2004
- 2004-09-10 ZA ZA200407272A patent/ZA200407272B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3526883A (en) * | 1968-10-09 | 1970-09-01 | Bell Telephone Labor Inc | Magnetic domain display device |
US4220395A (en) * | 1974-05-13 | 1980-09-02 | Regents Of University Of California | Polarization converter and circuit elements for use in optical waveguides |
US4495492A (en) * | 1982-05-05 | 1985-01-22 | Litton Systems, Inc. | Magneto-optic chip with gray-scale capability |
US5344720A (en) * | 1991-11-08 | 1994-09-06 | Litton Systems, Inc. | Bistable magneto-optic single crystal films and method of producing same utilizing controlled defect introduction |
WO2001020390A1 (de) * | 1999-09-15 | 2001-03-22 | Didosyan Juri S | Magnetooptisches schaltelement mit einem faraday-rotator |
Non-Patent Citations (2)
Title |
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CHETKIN M V ET AL: "MEASUREMENT OF THE VELOCITY OF MOTION OF DOMAIN BOUNDARIES BY A MAGNETOOPTICAL METHOD" INSTRUMENTS AND EXPERIMENTAL TECHNIQUES, CONSULTANTS BUREAU. NEW YORK, US, Bd. 23, Nr. 1, Januar 1980 (1980-01), Seiten 215-218, XP000960418 ISSN: 0020-4412 * |
GADETSKY S ET AL: "MAGNETO-OPTICAL RECORDING ON PATTERNED SUBSTRATES (INVITED)" JOURNAL OF APPLIED PHYSICS, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, Bd. 79, Nr. 8, PART 2B, 15. April 1996 (1996-04-15), Seiten 5687-5692, XP000694924 ISSN: 0021-8979 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT501111A1 (de) * | 2004-12-09 | 2006-06-15 | Univ Wien Tech | Verfahren und vorrichtung zur änderung des polarisationszustandes von licht |
AT501111B1 (de) * | 2004-12-09 | 2006-09-15 | Univ Wien Tech | Verfahren und vorrichtung zur änderung des polarisationszustandes von licht |
US9150629B2 (en) | 2013-03-14 | 2015-10-06 | Daiichi Sankyo Co., Ltd. | Human tear lipocalins which bind PCSK9 and methods of use thereof |
US9598476B2 (en) | 2013-03-14 | 2017-03-21 | Daiichi Sankyo Co., Ltd. | Nucleic acid molecules encoding muteins of human tear lipocalin which bind PCSK9 |
Also Published As
Publication number | Publication date |
---|---|
WO2003069395A3 (de) | 2003-12-18 |
ZA200407272B (en) | 2005-10-18 |
EP1474722A2 (de) | 2004-11-10 |
KR20040089623A (ko) | 2004-10-21 |
US7158301B2 (en) | 2007-01-02 |
CA2475203A1 (en) | 2003-08-21 |
JP2005517977A (ja) | 2005-06-16 |
CN100397148C (zh) | 2008-06-25 |
AU2003206487A1 (en) | 2003-09-04 |
PL370581A1 (en) | 2005-05-30 |
US20050128729A1 (en) | 2005-06-16 |
RU2303801C2 (ru) | 2007-07-27 |
RU2004127230A (ru) | 2005-04-10 |
AT411852B (de) | 2004-06-25 |
CN1688915A (zh) | 2005-10-26 |
ATA2162002A (de) | 2003-11-15 |
MXPA04007814A (es) | 2005-06-20 |
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