DE69329912D1 - Diffraktive optische Vorrichtung - Google Patents
Diffraktive optische VorrichtungInfo
- Publication number
- DE69329912D1 DE69329912D1 DE69329912T DE69329912T DE69329912D1 DE 69329912 D1 DE69329912 D1 DE 69329912D1 DE 69329912 T DE69329912 T DE 69329912T DE 69329912 T DE69329912 T DE 69329912T DE 69329912 D1 DE69329912 D1 DE 69329912D1
- Authority
- DE
- Germany
- Prior art keywords
- optical device
- diffractive optical
- diffractive
- optical
- 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.)
- Expired - Fee Related
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
- G02F1/35—Non-linear optics
- G02F1/355—Non-linear optics characterised by the materials used
- G02F1/3558—Poled materials, e.g. with periodic poling; Fabrication of domain inverted structures, e.g. for quasi-phase-matching [QPM]
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/124—Geodesic lenses or integrated gratings
-
- 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
- G02F1/35—Non-linear optics
- G02F1/37—Non-linear optics for second-harmonic generation
- G02F1/377—Non-linear optics for second-harmonic generation in an optical waveguide structure
-
- 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
- G02F1/35—Non-linear optics
- G02F1/37—Non-linear optics for second-harmonic generation
- G02F1/377—Non-linear optics for second-harmonic generation in an optical waveguide structure
- G02F1/3775—Non-linear optics for second-harmonic generation in an optical waveguide structure with a periodic structure, e.g. domain inversion, for quasi-phase-matching [QPM]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/12—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12166—Manufacturing methods
- G02B2006/12173—Masking
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12166—Manufacturing methods
- G02B2006/12176—Etching
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12166—Manufacturing methods
- G02B2006/12183—Ion-exchange
-
- 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
- G02F1/03—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 ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/035—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 ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect in an optical waveguide structure
-
- 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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating
- G02F2201/307—Reflective grating, i.e. Bragg grating
-
- 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
- G02F2203/00—Function characteristic
- G02F2203/22—Function characteristic diffractive
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/12—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
- H01S5/1206—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers having a non constant or multiplicity of periods
- H01S5/1215—Multiplicity of periods
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/12—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
- H01S5/1228—DFB lasers with a complex coupled grating, e.g. gain or loss coupling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/12—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
- H01S5/125—Distributed Bragg reflector [DBR] lasers
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Optical Integrated Circuits (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18913892A JPH0637398A (ja) | 1992-07-16 | 1992-07-16 | レーザ光源および光情報処理装置 |
JP4204821A JPH0653482A (ja) | 1992-07-31 | 1992-07-31 | 光集積回路および光ピックアップ |
JP4204815A JPH0651359A (ja) | 1992-07-31 | 1992-07-31 | 波長変換素子、短波長レーザ装置および波長可変レーザ装置 |
JP8595093 | 1993-04-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69329912D1 true DE69329912D1 (de) | 2001-03-08 |
DE69329912T2 DE69329912T2 (de) | 2001-07-19 |
Family
ID=27467187
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69327738T Expired - Fee Related DE69327738T2 (de) | 1992-07-16 | 1993-07-16 | Vorrichtung zur Wellenlängenänderung und Laserstrahlerzeugungsgerät |
DE69329912T Expired - Fee Related DE69329912T2 (de) | 1992-07-16 | 1993-07-16 | Diffraktive optische Vorrichtung |
DE69325210T Expired - Fee Related DE69325210T2 (de) | 1992-07-16 | 1993-07-16 | Optisches Gittergerät |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69327738T Expired - Fee Related DE69327738T2 (de) | 1992-07-16 | 1993-07-16 | Vorrichtung zur Wellenlängenänderung und Laserstrahlerzeugungsgerät |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69325210T Expired - Fee Related DE69325210T2 (de) | 1992-07-16 | 1993-07-16 | Optisches Gittergerät |
Country Status (3)
Country | Link |
---|---|
US (1) | US5619369A (de) |
EP (3) | EP0753768B1 (de) |
DE (3) | DE69327738T2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115079344A (zh) * | 2021-03-10 | 2022-09-20 | 格芯(美国)集成电路科技有限公司 | 用于光子集成电路的光学天线及其形成方法 |
Families Citing this family (41)
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DE69529378T2 (de) | 1994-09-14 | 2003-10-09 | Matsushita Electric Ind Co Ltd | Verfahren zur Stabilisierung der Ausgangsleistung von höheren harmonischen Wellen und Laserlichtquelle mit kurzer Wellenlänge die dasselbe benutzt |
FR2728697B1 (fr) * | 1994-12-23 | 1997-01-24 | Thomson Csf | Convertisseur de frequence a tres haute efficacite, en optique guidee |
JP3861270B2 (ja) * | 1996-02-23 | 2006-12-20 | エプソントヨコム株式会社 | 光ピックアップ及びそれに用いる光学素子 |
KR100227778B1 (ko) * | 1996-12-23 | 1999-11-01 | 정선종 | 비선형 격자 결합기의 구조 |
US6711183B1 (en) * | 1998-05-18 | 2004-03-23 | Matsushita Electric Industrial Co., Ltd. | Optical wavelength conversion device, coherent light generator, and optical information processing apparatus |
FR2779835A1 (fr) * | 1998-06-11 | 1999-12-17 | Centre Nat Rech Scient | Dispositif de diffraction de lumiere enfoui dans un materiau |
JP2000066156A (ja) * | 1998-08-25 | 2000-03-03 | Mitsubishi Electric Corp | マッハツェンダ型光変調器 |
JP2000214506A (ja) * | 1998-11-03 | 2000-08-04 | Toshiba Research Europe Ltd | 放射光線源及び撮像システム |
GB2343964B (en) * | 1998-11-03 | 2000-11-01 | Toshiba Res Europ Ltd | An optical device |
AU4640100A (en) | 1999-03-08 | 2000-09-28 | Optigain, Inc. | Side-pumped fiber laser |
JP2001281473A (ja) * | 2000-03-28 | 2001-10-10 | Toshiba Corp | フォトニクス結晶及びその製造方法、光モジュール並びに光システム |
DE10102683A1 (de) * | 2001-01-22 | 2002-08-14 | Fraunhofer Ges Forschung | Vorrichtung zum Vervielfachen von Lichtfrequenzen |
DE10121462A1 (de) * | 2001-05-02 | 2002-11-21 | Infineon Technologies Ag | Gitteranordnung |
US6904198B2 (en) * | 2002-01-22 | 2005-06-07 | Douglas Raymond Dykaar | Device for coupling light into the fiber |
US7295742B2 (en) * | 2002-05-31 | 2007-11-13 | Matsushita Electric Industrial Co., Ltd. | Optical element and method for producing the same |
JP2004109914A (ja) * | 2002-09-20 | 2004-04-08 | Nikon Corp | 擬似位相整合水晶の製造方法及び擬似位相整合水晶 |
US20040086012A1 (en) * | 2002-10-23 | 2004-05-06 | Matsushita Electric Industrial Co., Ltd | Coherent light source and method for driving the same |
JP2004214911A (ja) * | 2002-12-27 | 2004-07-29 | Sanyo Electric Co Ltd | Agc回路 |
US7289699B1 (en) | 2004-04-29 | 2007-10-30 | Northrop Grumman Corporation | Grating apodization technique for diffused optical waveguides |
JP2006030542A (ja) * | 2004-07-15 | 2006-02-02 | Noritsu Koki Co Ltd | 光強度変調素子、強度変調光発生器、レーザ露光装置および写真処理装置 |
JP4978468B2 (ja) * | 2005-04-14 | 2012-07-18 | パナソニック株式会社 | 短波長光源 |
JP2008083482A (ja) * | 2006-09-28 | 2008-04-10 | Seiko Epson Corp | レーザ光源装置、照明装置、モニタ装置およびプロジェクタ |
JP2008109083A (ja) * | 2006-09-29 | 2008-05-08 | Seiko Epson Corp | レーザ光源装置、照明装置、モニタ装置およびプロジェクタ |
FR2906934B1 (fr) * | 2006-10-05 | 2009-01-30 | Commissariat Energie Atomique | Detecteur optique ultrasensible a grande resolution temporelle, utilisant un couplage a reseau. |
US20100134874A1 (en) * | 2007-03-30 | 2010-06-03 | Yukihiro Ozeki | Second harmonic generation device and method for manufacturing the same |
US7742222B2 (en) * | 2008-02-29 | 2010-06-22 | Corning Incorporated | Conversion device with multi-faceted output face and laser projection system incorporating the same |
US7646531B1 (en) | 2008-08-15 | 2010-01-12 | Corning Incorporated | Wavelength conversion devices having multi-component output faces and systems incorporating the same |
US7773293B2 (en) * | 2008-08-28 | 2010-08-10 | Corning Incorporated | Wavelength conversion devices having multi-component output faces and systems incorporating the same |
US8488117B2 (en) * | 2010-10-10 | 2013-07-16 | Applied Materials Israel, Ltd. | Inspection system and method for fast changes of focus |
JP2013140225A (ja) * | 2011-12-28 | 2013-07-18 | Citizen Holdings Co Ltd | レーザ光源 |
US8682114B2 (en) * | 2012-06-29 | 2014-03-25 | Infinera Corporation | Coherent detection for an integrated circuit having a multiplexer or a demultiplexer with a shared propagation region |
TWI572912B (zh) * | 2012-12-17 | 2017-03-01 | 鴻海精密工業股份有限公司 | 光調變器 |
TWI557454B (zh) * | 2012-12-27 | 2016-11-11 | 鴻海精密工業股份有限公司 | 光調變器 |
CN103901637A (zh) * | 2012-12-28 | 2014-07-02 | 鸿富锦精密工业(深圳)有限公司 | 光调变器 |
TW201441721A (zh) * | 2013-04-25 | 2014-11-01 | Hon Hai Prec Ind Co Ltd | 電光調製器 |
US10114269B2 (en) * | 2015-02-11 | 2018-10-30 | The Regents Of The University Of California | Heterogeneous waveguides and methods of manufacture |
EP3151397B1 (de) * | 2015-10-01 | 2018-04-11 | Tetra Laval Holdings & Finance S.A. | Antriebssystem mit elektromagnetischer energieübertragung |
CN105896309A (zh) * | 2016-06-13 | 2016-08-24 | 深圳新飞通光电子技术有限公司 | 双向输出的dfb可调谐激光模块及其相干光传输系统 |
WO2018191315A1 (en) * | 2017-04-10 | 2018-10-18 | Signature Science, Llc | Method and apparatus for control and dynamic manipulation of electro-magnetic wave spectrum via external modulation of refractive index |
US11467341B2 (en) * | 2020-11-10 | 2022-10-11 | Globalfoundries U.S. Inc. | Waveguide crossings including a segmented waveguide section |
CN113238426B (zh) * | 2021-05-18 | 2022-12-09 | 东南大学 | 一种基于量子点非线性的光限幅器件及其非线性薄膜制备方法 |
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US5303247A (en) * | 1992-03-11 | 1994-04-12 | Matsushita Electric Industrial Co., Ltd. | Optical harmonic generating device for generating harmonic wave from fundamental wave and shorter wavelength laser generating apparatus in which fundamental wave of laser is converted to harmonic wave with the device |
JP2783047B2 (ja) * | 1992-03-27 | 1998-08-06 | 松下電器産業株式会社 | 光波長変換素子およびそれを用いたレーザ光源 |
JP3052651B2 (ja) * | 1992-06-17 | 2000-06-19 | 松下電器産業株式会社 | 短波長光源 |
-
1993
- 1993-07-15 US US08/091,955 patent/US5619369A/en not_active Expired - Lifetime
- 1993-07-16 DE DE69327738T patent/DE69327738T2/de not_active Expired - Fee Related
- 1993-07-16 DE DE69329912T patent/DE69329912T2/de not_active Expired - Fee Related
- 1993-07-16 EP EP96113155A patent/EP0753768B1/de not_active Expired - Lifetime
- 1993-07-16 EP EP96113153A patent/EP0753767B1/de not_active Expired - Lifetime
- 1993-07-16 DE DE69325210T patent/DE69325210T2/de not_active Expired - Fee Related
- 1993-07-16 EP EP93305618A patent/EP0579511B1/de not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115079344A (zh) * | 2021-03-10 | 2022-09-20 | 格芯(美国)集成电路科技有限公司 | 用于光子集成电路的光学天线及其形成方法 |
CN115079344B (zh) * | 2021-03-10 | 2024-05-24 | 格芯(美国)集成电路科技有限公司 | 用于光子集成电路的光学天线及其形成方法 |
Also Published As
Publication number | Publication date |
---|---|
EP0579511B1 (de) | 1999-06-09 |
DE69325210D1 (de) | 1999-07-15 |
DE69327738T2 (de) | 2000-06-15 |
EP0753767A2 (de) | 1997-01-15 |
EP0753767B1 (de) | 2001-01-31 |
EP0753768B1 (de) | 2000-01-26 |
EP0579511A3 (en) | 1994-06-15 |
EP0753768A3 (de) | 1997-01-22 |
DE69325210T2 (de) | 1999-11-11 |
DE69327738D1 (de) | 2000-03-02 |
EP0579511A2 (de) | 1994-01-19 |
DE69329912T2 (de) | 2001-07-19 |
EP0753767A3 (de) | 1997-01-29 |
US5619369A (en) | 1997-04-08 |
EP0753768A2 (de) | 1997-01-15 |
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