ES2111006T3 - Fibra optica con aditivo fluorescente. - Google Patents
Fibra optica con aditivo fluorescente.Info
- Publication number
- ES2111006T3 ES2111006T3 ES92103726T ES92103726T ES2111006T3 ES 2111006 T3 ES2111006 T3 ES 2111006T3 ES 92103726 T ES92103726 T ES 92103726T ES 92103726 T ES92103726 T ES 92103726T ES 2111006 T3 ES2111006 T3 ES 2111006T3
- Authority
- ES
- Spain
- Prior art keywords
- fiber optic
- fluorescent additive
- additive
- al2o3
- fibre
- 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 - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/0071—Compositions for glass with special properties for laserable glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/018—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01807—Reactant delivery systems, e.g. reactant deposition burners
- C03B37/01838—Reactant delivery systems, e.g. reactant deposition burners for delivering and depositing additional reactants as liquids or solutions, e.g. for solution doping of the deposited glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/04—Fibre optics, e.g. core and clad fibre compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C13/00—Fibre or filament compositions
- C03C13/04—Fibre optics, e.g. core and clad fibre compositions
- C03C13/045—Silica-containing oxide glass compositions
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/20—Doped silica-based glasses doped with non-metals other than boron or fluorine
- C03B2201/28—Doped silica-based glasses doped with non-metals other than boron or fluorine doped with phosphorus
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
- C03B2201/31—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with germanium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
- C03B2201/34—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with rare earth metals, i.e. with Sc, Y or lanthanides, e.g. for laser-amplifiers
- C03B2201/36—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with rare earth metals, i.e. with Sc, Y or lanthanides, e.g. for laser-amplifiers doped with rare earth metals and aluminium, e.g. Er-Al co-doped
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/22—Radial profile of refractive index, composition or softening point
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/0672—Non-uniform radial doping
-
- 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
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1691—Solid materials characterised by additives / sensitisers / promoters as further dopants
- H01S3/1693—Solid materials characterised by additives / sensitisers / promoters as further dopants aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Electromagnetism (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Plasma & Fusion (AREA)
- Lasers (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Glass Compositions (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Noodles (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
UNA FIBRA OPTICA PARA UTILIZAR EN LASERS DE FIBRA CONTIENE ER ELEVADO 3 ELEVADO + COMO EL ADITIVO DE LASER, JUNTO CON A1203 PARA REDUCIR LA PERDIDA DEL ADITIVO LASER DURANTE LA PREPARACION DE LA FIBRA. PREFERIBLEMENTE EL NUCLEO TIENE UNA REGION INTERIOR QUE CONTIENE ER ELEVADO 3 ELEVADO + Y A1203 Y UNA REGION EXTERIOR QUE NO CONTIENE ER ELEVADO 3 ELEVADO +.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB878724736A GB8724736D0 (en) | 1987-10-22 | 1987-10-22 | Optical fibre |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2111006T3 true ES2111006T3 (es) | 1998-03-01 |
Family
ID=10625717
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES88308450T Expired - Lifetime ES2052736T3 (es) | 1987-10-22 | 1988-09-13 | Fibra optica con aditivo fluorescente. |
ES92103726T Expired - Lifetime ES2111006T3 (es) | 1987-10-22 | 1988-09-13 | Fibra optica con aditivo fluorescente. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES88308450T Expired - Lifetime ES2052736T3 (es) | 1987-10-22 | 1988-09-13 | Fibra optica con aditivo fluorescente. |
Country Status (11)
Country | Link |
---|---|
US (2) | US4923279A (es) |
EP (2) | EP0490881B1 (es) |
JP (3) | JPH07118558B2 (es) |
AT (2) | ATE81925T1 (es) |
CA (2) | CA1327845C (es) |
DE (2) | DE3856092T2 (es) |
ES (2) | ES2052736T3 (es) |
GB (1) | GB8724736D0 (es) |
GR (2) | GR3006615T3 (es) |
HK (2) | HK128796A (es) |
SG (1) | SG47966A1 (es) |
Families Citing this family (77)
Publication number | Priority date | Publication date | Assignee | Title |
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FR2638854B1 (fr) * | 1988-11-10 | 1992-09-04 | Comp Generale Electricite | Amplificateur laser a fibre optique dopee |
JP2546711B2 (ja) * | 1988-12-22 | 1996-10-23 | 国際電信電話株式会社 | Erドープ光ファイバレーザ素子 |
EP0611732B1 (en) * | 1989-10-31 | 1997-10-08 | Fujitsu Limited | Process for fabricating an optical fiber preform |
US5005175A (en) * | 1989-11-27 | 1991-04-02 | At&T Bell Laboratories | Erbium-doped fiber amplifier |
US5121450A (en) * | 1989-12-22 | 1992-06-09 | Gte Laboratories Incorporated | Fiber optical Y-junction |
US5638204A (en) * | 1990-01-22 | 1997-06-10 | Pirelli Cavi S.P.A. | Optical power amplifier with Al2 O3 and erbium doped active fiber |
IT1237980B (it) * | 1990-02-12 | 1993-06-19 | Pirelli Cavi Spa | Amplificatore ottico a fibra attiva monomodale incurvata |
WO1991013038A1 (en) * | 1990-02-28 | 1991-09-05 | Otc Limited | A rare-earth doped fibre |
US5040186A (en) * | 1990-03-13 | 1991-08-13 | At&T Bell Laboratories | InP-based quantum-well laser |
FR2659755B1 (fr) * | 1990-03-16 | 1992-05-29 | Alcatel Nv | Amplificateur optique a fibre dopee a l'erbium. |
GB9010943D0 (en) * | 1990-05-16 | 1990-07-04 | British Telecomm | Wave-guiding structure with lasing properties |
US5109463A (en) * | 1990-06-25 | 1992-04-28 | Lee Ho Shang | Fiber optic lamp |
US5155621A (en) * | 1990-07-31 | 1992-10-13 | Fujitsu Limited | Optical fiber amplifier |
US5074633A (en) * | 1990-08-03 | 1991-12-24 | At&T Bell Laboratories | Optical communication system comprising a fiber amplifier |
US5058976A (en) * | 1990-08-03 | 1991-10-22 | At&T Bell Laboratories | System comprising Er-doped optical fiber |
JP2888616B2 (ja) * | 1990-08-08 | 1999-05-10 | 住友電気工業株式会社 | 光増幅装置及び光発振装置 |
US5039190A (en) * | 1990-09-07 | 1991-08-13 | At&T Bell Laboratories | Apparatus comprising an optical gain device, and method of producing the device |
GB2249660B (en) * | 1990-11-09 | 1994-07-06 | Stc Plc | Amplified optical fibre systems |
DE4036938A1 (de) * | 1990-11-20 | 1992-05-21 | Drescher Ruediger | Solarturmkraftwerk |
JP3292729B2 (ja) * | 1990-11-26 | 2002-06-17 | 三菱電機株式会社 | 光ファイバ形光増幅装置 |
US5121460A (en) * | 1991-01-31 | 1992-06-09 | The Charles Stark Draper Lab., Inc. | High-power mode-selective optical fiber laser |
US5107538A (en) * | 1991-06-06 | 1992-04-21 | At&T Bell Laboratories | Optical waveguide system comprising a rare-earth Si-based optical device |
JP2959877B2 (ja) * | 1991-06-24 | 1999-10-06 | 古河電気工業株式会社 | 光ファイバの製造方法 |
US5191586A (en) * | 1991-07-18 | 1993-03-02 | General Instrument Corporation | Narrow band incoherent optical carrier generator |
US5268910A (en) * | 1991-07-18 | 1993-12-07 | General Instrument Corporation | Superluminescent optical source |
FR2679548B1 (fr) * | 1991-07-25 | 1994-10-21 | Alsthom Cge Alcatel | Procede de fabrication de fibres optiques actives. |
US5227913A (en) * | 1991-09-11 | 1993-07-13 | Wisconsin Alumni Research Foundation | Co-deposition of erbium and titanium into lithium niobate and optical amplifier produced thereby |
JP2766420B2 (ja) * | 1992-04-07 | 1998-06-18 | 株式会社フジクラ | エルビウム添加石英の製造方法 |
US5299210A (en) * | 1992-04-28 | 1994-03-29 | Rutgers University | Four-level multiply doped rare earth laser system |
US5259046A (en) * | 1992-10-01 | 1993-11-02 | At&T Bell Laboratories | Article comprising an optical waveguide containing a fluorescent dopant |
US5296012A (en) * | 1992-12-28 | 1994-03-22 | Corning Incorporated | Method of making optical waveguide preforms |
US5337375A (en) * | 1992-12-31 | 1994-08-09 | At&T Bell Laboratories | Depolarizer using unpumped, doped optical fiber and method using same |
JP3301275B2 (ja) * | 1994-09-27 | 2002-07-15 | 日本電信電話株式会社 | 光ファイバ増幅器 |
JPH08278523A (ja) | 1995-04-05 | 1996-10-22 | Hitachi Ltd | 光増幅装置 |
US5588084A (en) * | 1995-04-28 | 1996-12-24 | Johnson; Kurtis F. | Scintillating optical fibers containing non-uniformly distributed dopants and process for preparing same |
DE69630426T2 (de) * | 1995-08-31 | 2004-08-19 | Sumitomo Electric Industries, Ltd. | Dispersionskompensierende Faser und Verfahren zu ihrer Herstellung |
FR2740563B1 (fr) * | 1995-10-31 | 1997-11-21 | Alcatel Submarcom | Fibre optique comprenant un dopant fluorescent |
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US5854865A (en) * | 1995-12-07 | 1998-12-29 | The United States Of America As Represented By The Secretary Of The Navy | Method and apparatus for side pumping an optical fiber |
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US6289698B1 (en) * | 1996-08-02 | 2001-09-18 | Corning Incorporated | Method of making a fiber preform with increases in alumina concentration at radial distances |
US5729645A (en) * | 1996-08-13 | 1998-03-17 | The Trustees Of The University Of Pennsylvania | Graded index optical fibers |
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US6620748B1 (en) * | 1998-10-20 | 2003-09-16 | Asahi Glass Co Ltd | Light-amplifying glass, light-amplifying medium and resin-coated light-amplifying medium |
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US20020071647A1 (en) * | 1999-12-08 | 2002-06-13 | Tariq Manzur | Multi-clad optical fiber and amplifier |
US6353497B1 (en) | 2000-03-03 | 2002-03-05 | Optical Coating Laboratory, Inc. | Integrated modular optical amplifier |
FR2805899B1 (fr) * | 2000-03-03 | 2003-01-31 | Cit Alcatel | Amplification optique a fibre a gaine multimode en bande c |
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US6836607B2 (en) | 2001-03-14 | 2004-12-28 | Corning Incorporated | Cladding-pumped 3-level fiber laser/amplifier |
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CN101688949B (zh) * | 2007-02-05 | 2012-01-18 | Ofs菲特尔有限责任公司 | 防止光纤中的电介质击穿 |
DE102016111730B3 (de) * | 2016-06-27 | 2017-12-28 | Leica Microsystems Cms Gmbh | Beleuchtungseinrichtung sowie Mikroskop mit einer derartigen Beleuchtungseinrichtung |
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JP6833611B2 (ja) * | 2017-05-25 | 2021-02-24 | 株式会社クラレ | プラスチック波長変換ファイバ及びその製造方法 |
EP3952037A4 (en) * | 2019-03-29 | 2022-12-28 | Fujikura Ltd. | OPTICAL FIBER WITH ACTIVE ELEMENT, RESONATOR AND FIBER LASER DEVICE |
JP7268245B2 (ja) * | 2020-03-27 | 2023-05-02 | 株式会社フジクラ | 活性元素添加光ファイバ、活性元素添加光ファイバ用母材、共振器、及び、ファイバレーザ装置 |
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US4715679A (en) * | 1981-12-07 | 1987-12-29 | Corning Glass Works | Low dispersion, low-loss single-mode optical waveguide |
US4516826A (en) * | 1983-04-21 | 1985-05-14 | At&T Technologies, Inc. | Single mode lightguide fiber having a trapezoidal refractive index profile |
US4618211A (en) * | 1984-03-12 | 1986-10-21 | At&T Bell Laboratories | Optical fiber tap with activatable chemical species |
JPS60200208A (ja) * | 1984-03-23 | 1985-10-09 | Fujitsu Ltd | 光フアイバ |
US4637025A (en) * | 1984-10-22 | 1987-01-13 | Polaroid Corporation | Super radiant light source |
US4597787A (en) * | 1984-11-13 | 1986-07-01 | Ispra Fibroptics Industries Herzlia Ltd. | Manufacture of optical fibre preforms |
JPS61151034A (ja) * | 1984-12-26 | 1986-07-09 | Nippon Sekiei Glass Kk | 赤外光増幅用石英レ−ザ−ガラス |
WO1986007348A1 (en) * | 1985-06-03 | 1986-12-18 | Hughes Aircraft Company | Method for introducing dopants in optical fiber preforms |
US4780877A (en) * | 1985-07-26 | 1988-10-25 | Polaroid Corporation | Optical fiber laser |
GB2199690A (en) * | 1985-08-13 | 1988-07-13 | Robert Joseph Mears | Fibre-optic lasers and amplifiers |
US4666486A (en) * | 1985-09-24 | 1987-05-19 | Hutta Joseph J | Process for making bulk heavy metal fluoride glasses |
JPS62111208A (ja) * | 1985-11-11 | 1987-05-22 | Nippon Telegr & Teleph Corp <Ntt> | 光フアイバ |
JPS62158135A (ja) * | 1985-12-28 | 1987-07-14 | Hoya Corp | フアラデ−回転シングルモ−ド光フアイバ− |
JPS63184386A (ja) * | 1986-09-18 | 1988-07-29 | Furukawa Electric Co Ltd:The | 光ファイバと光ファイバ型発光体 |
-
1987
- 1987-10-22 GB GB878724736A patent/GB8724736D0/en active Pending
-
1988
- 1988-09-13 EP EP92103726A patent/EP0490881B1/en not_active Expired - Lifetime
- 1988-09-13 AT AT88308450T patent/ATE81925T1/de not_active IP Right Cessation
- 1988-09-13 EP EP88308450A patent/EP0313209B1/en not_active Expired
- 1988-09-13 ES ES88308450T patent/ES2052736T3/es not_active Expired - Lifetime
- 1988-09-13 DE DE3856092T patent/DE3856092T2/de not_active Expired - Lifetime
- 1988-09-13 ES ES92103726T patent/ES2111006T3/es not_active Expired - Lifetime
- 1988-09-13 AT AT92103726T patent/ATE161664T1/de not_active IP Right Cessation
- 1988-09-13 DE DE8888308450T patent/DE3875582T2/de not_active Expired - Lifetime
- 1988-09-13 SG SG1996005734A patent/SG47966A1/en unknown
- 1988-10-13 US US07/257,101 patent/US4923279A/en not_active Ceased
- 1988-10-18 CA CA000580531A patent/CA1327845C/en not_active Expired - Lifetime
- 1988-10-21 JP JP63265903A patent/JPH07118558B2/ja not_active Expired - Lifetime
-
1992
- 1992-05-06 US US07/879,843 patent/USRE35946E/en not_active Expired - Lifetime
- 1992-08-12 JP JP4215123A patent/JPH05283789A/ja active Pending
- 1992-12-21 GR GR920403026T patent/GR3006615T3/el unknown
-
1993
- 1993-05-28 CA CA000616670A patent/CA1334306C/en not_active Expired - Lifetime
-
1996
- 1996-07-18 HK HK128796A patent/HK128796A/xx not_active IP Right Cessation
-
1997
- 1997-12-30 GR GR970403208T patent/GR3025787T3/el unknown
-
1998
- 1998-06-29 HK HK98108772A patent/HK1008761A1/xx not_active IP Right Cessation
- 1998-10-19 JP JP10296953A patent/JPH11195832A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
EP0490881B1 (en) | 1997-12-29 |
EP0490881A3 (en) | 1993-04-07 |
HK128796A (en) | 1996-07-26 |
GR3025787T3 (en) | 1998-03-31 |
DE3875582D1 (de) | 1992-12-03 |
SG47966A1 (en) | 1998-04-17 |
ATE81925T1 (de) | 1992-11-15 |
ES2052736T3 (es) | 1994-07-16 |
GR3006615T3 (es) | 1993-06-30 |
CA1327845C (en) | 1994-03-15 |
JPH01145881A (ja) | 1989-06-07 |
EP0490881A2 (en) | 1992-06-17 |
DE3856092D1 (de) | 1998-02-05 |
EP0313209B1 (en) | 1992-10-28 |
EP0313209A1 (en) | 1989-04-26 |
JPH05283789A (ja) | 1993-10-29 |
HK1008761A1 (en) | 1999-05-14 |
US4923279A (en) | 1990-05-08 |
GB8724736D0 (en) | 1987-11-25 |
DE3856092T2 (de) | 1998-05-14 |
USRE35946E (en) | 1998-11-03 |
JPH11195832A (ja) | 1999-07-21 |
CA1334306C (en) | 1995-02-07 |
DE3875582T2 (de) | 1993-04-15 |
ATE161664T1 (de) | 1998-01-15 |
JPH07118558B2 (ja) | 1995-12-18 |
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