CA2110930A1 - Rare Earth Doped Optical Fiber Amplifiers - Google Patents
Rare Earth Doped Optical Fiber AmplifiersInfo
- Publication number
- CA2110930A1 CA2110930A1 CA2110930A CA2110930A CA2110930A1 CA 2110930 A1 CA2110930 A1 CA 2110930A1 CA 2110930 A CA2110930 A CA 2110930A CA 2110930 A CA2110930 A CA 2110930A CA 2110930 A1 CA2110930 A1 CA 2110930A1
- Authority
- CA
- Canada
- Prior art keywords
- optical fiber
- rare earth
- erbium
- doped optical
- earth doped
- 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.)
- Granted
Links
Classifications
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03638—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only
- G02B6/0365—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only arranged - - +
-
- 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
-
- 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
- C03C13/045—Silica-containing oxide glass compositions
- C03C13/046—Multicomponent glass compositions
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03638—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only
- G02B6/03644—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 3 layers only arranged - + -
-
- 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
-
- 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
- C03B2201/08—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant
- C03B2201/10—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with boron
-
- 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
- C03B2201/08—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant
- C03B2201/12—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with fluorine
-
- 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
- C03B2201/08—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant
- C03B2201/14—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with boron and fluorine
-
- 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
-
- 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
- H01S3/06729—Peculiar transverse fibre profile
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
- H01S3/094011—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre with bidirectional pumping, i.e. with injection of the pump light from both two ends of the fibre
-
- 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
Abstract
In accordance with the present invention, an optical amplifier is provided having an erbium doped fibre, without erbium confinement, having a NA higher than 0.2 in which the background loss of the fibre at the pump wavelength is at a level which does not significantly reduce the optimum gain efficiency of the amplifier from its theoretical value. Briefly, this is achieved by having the difference in the coefficients of thermal expansion of the core and cladding adjacent the core/cladding interface at a value which is less than a predetermined value which corresponds to a ratio of erbium loss to background greater than a predetermined ratio.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9226024.9 | 1992-12-14 | ||
GB9226024A GB2273389B (en) | 1992-12-14 | 1992-12-14 | Rare earth doped optical fibre amplifiers |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2110930A1 true CA2110930A1 (en) | 1994-06-15 |
CA2110930C CA2110930C (en) | 1999-07-20 |
Family
ID=10726569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002110930A Expired - Fee Related CA2110930C (en) | 1992-12-14 | 1993-12-08 | Rare earth doped optical fiber amplifiers |
Country Status (11)
Country | Link |
---|---|
US (1) | US5491581A (en) |
EP (1) | EP0602467B1 (en) |
JP (1) | JPH06250243A (en) |
AU (1) | AU666983B2 (en) |
BR (1) | BR9305307A (en) |
CA (1) | CA2110930C (en) |
DE (1) | DE69318523T2 (en) |
DK (1) | DK0602467T3 (en) |
ES (1) | ES2119853T3 (en) |
GB (1) | GB2273389B (en) |
NZ (2) | NZ250346A (en) |
Families Citing this family (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2273389B (en) * | 1992-12-14 | 1996-07-17 | Pirelli Cavi Spa | Rare earth doped optical fibre amplifiers |
FR2740563B1 (en) * | 1995-10-31 | 1997-11-21 | Alcatel Submarcom | FIBER OPTIC COMPRISING A FLUORESCENT DOPANT |
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 |
KR100194421B1 (en) * | 1996-01-29 | 1999-06-15 | 윤종용 | Fiber optic amplifier |
JPH1079543A (en) * | 1996-09-03 | 1998-03-24 | Fujitsu Ltd | Rare earth dopes optical fiber |
US5708669A (en) * | 1996-09-24 | 1998-01-13 | Lucent Technologies Inc. | Article comprising a cladding-pumped optical fiber laser |
US5877890A (en) * | 1996-10-30 | 1999-03-02 | Rutgers, The State University Of New Jersey | Optical-fiber amplifier having high-saturation output |
US5930013A (en) * | 1996-12-31 | 1999-07-27 | Lucent Technologies Inc. | Optical switched selector |
US5815613A (en) * | 1996-12-31 | 1998-09-29 | Lucent Technologies Inc. | Optical switched distributor |
US5889610A (en) * | 1996-12-31 | 1999-03-30 | Lucent Technologies Inc. | Optical protection switching system |
US6263003B1 (en) * | 1997-02-14 | 2001-07-17 | Alliedsignal Inc. | High-power cladding-pumped broadband fiber source and amplifier |
US6783705B1 (en) | 1997-04-11 | 2004-08-31 | Waters Investments Limited | Calibration medium for wavelength calibration of U.V. absorbance detectors and methods for calibration |
US5949941A (en) * | 1997-11-21 | 1999-09-07 | Lucent Technologies Inc. | Cladding-pumped fiber structures |
FR2778751B1 (en) * | 1998-05-14 | 2000-06-16 | Alsthom Cge Alcatel | OPTICAL FIBER FOR FLAT GAIN OPTICAL AMPLIFIER |
CN1168681C (en) * | 1998-06-25 | 2004-09-29 | 三星电子株式会社 | Optical fiber preform having OH barrier and mfg. method thereof |
FR2782807A1 (en) * | 1998-08-27 | 2000-03-03 | Alsthom Cge Alcatel | OPTICAL FIBER FOR OPTICAL AMPLIFIER USE WITH FLUORINE DOPED SHEATH |
WO2000026709A1 (en) | 1998-11-02 | 2000-05-11 | Sumitomo Electric Industries, Ltd. | Single-mode optical fiber and its production method |
JP2000252559A (en) * | 1999-03-01 | 2000-09-14 | Nec Corp | Double clad fiber and optical fiber amplifier |
KR100334789B1 (en) * | 1999-07-22 | 2002-05-02 | 윤종용 | Wide band light source for testing optic elements using feedback loop |
US6474106B1 (en) | 1999-11-30 | 2002-11-05 | Corning Incorporated | Rare earth and alumina-doped optical fiber preform process |
WO2001064010A2 (en) * | 2000-03-03 | 2001-09-07 | Optical Technologies Italia S.P.A | Optical amplifier and optical transmission system |
JP2001267665A (en) * | 2000-03-16 | 2001-09-28 | Sumitomo Electric Ind Ltd | Optical fiber for light amplification and optical fiber amplifier and optical fiber laser oscillator |
JP2002009376A (en) * | 2000-06-23 | 2002-01-11 | Furukawa Electric Co Ltd:The | Optical fiber for light amplification |
AU2001242728B2 (en) | 2001-02-02 | 2007-05-10 | Council Of Scientific And Industrial Research | A process for making rare earth doped optical fibre |
US6751990B2 (en) | 2001-03-06 | 2004-06-22 | Council Of Scientific And Industrial Research | Process for making rare earth doped optical fiber |
US6766075B1 (en) * | 2001-05-11 | 2004-07-20 | Pc Photonics Corporation | Side pumping of optical fiber systems via multiple delivery fibers |
US6778319B2 (en) * | 2001-09-10 | 2004-08-17 | Np Photonics, Inc. | Side-pumped multi-port optical amplifier and method of manufacture using fiber drawing technologies |
US6717721B2 (en) * | 2001-12-21 | 2004-04-06 | Corning Incorporated | Large effective area erbium doped fiber optical amplifier |
US20030167800A1 (en) * | 2002-03-11 | 2003-09-11 | Atkins Robert M. | Soot layer formation for solution doping of glass preforms |
US6851281B2 (en) * | 2002-03-28 | 2005-02-08 | Council Of Scientific And Industrial Research | Method of fabricating rare earth doped optical fibre |
US20030200771A1 (en) * | 2002-04-30 | 2003-10-30 | Burke Gerald E. | Method of manufacturing phosphosilicate optical fibers and optical fibers formed therefrom |
FR2893149B1 (en) * | 2005-11-10 | 2008-01-11 | Draka Comteq France | OPTICAL FIBER MONOMODE. |
EP2020062A2 (en) * | 2006-03-28 | 2009-02-04 | Crystal Fibre A/S | High power amplifier silica glass material |
FR2899693B1 (en) * | 2006-04-10 | 2008-08-22 | Draka Comteq France | OPTICAL FIBER MONOMODE. |
US7620282B2 (en) * | 2006-08-31 | 2009-11-17 | Corning Incorporated | Low bend loss single mode optical fiber |
CN101755228A (en) * | 2007-03-15 | 2010-06-23 | 恩莱特有限公司 | Optical fiber structure and a method of producing thereof |
DK2206001T3 (en) | 2007-11-09 | 2014-07-07 | Draka Comteq Bv | Optical fiber resistant to microbending |
FR2930997B1 (en) * | 2008-05-06 | 2010-08-13 | Draka Comteq France Sa | OPTICAL FIBER MONOMODE |
US7773848B2 (en) | 2008-07-30 | 2010-08-10 | Corning Incorporated | Low bend loss single mode optical fiber |
CN102396119A (en) * | 2009-06-12 | 2012-03-28 | J-纤维有限公司 | Optical fiber, in particular a laser fiber containing a doped glass fiber core and cladding around the fiberglass core |
AU2010325781A1 (en) * | 2009-12-04 | 2011-08-04 | MindsInSync, Inc. | Cushioned absorbent mat |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4339173A (en) * | 1975-09-08 | 1982-07-13 | Corning Glass Works | Optical waveguide containing P2 O5 and GeO2 |
US4358181A (en) * | 1977-09-29 | 1982-11-09 | Corning Glass Works | Gradient index optical waveguide and method of making |
US4302074A (en) * | 1979-04-02 | 1981-11-24 | Bell Telephone Laboratories, Incorporated | Aluminum metaphosphate optical fibers |
US4385802A (en) * | 1980-06-09 | 1983-05-31 | Corning Glass Works | Long wavelength, low-loss optical waveguide |
US4413882A (en) * | 1980-07-03 | 1983-11-08 | Corning Glass Works | Low viscosity core glass optical fiber |
US4664473A (en) * | 1985-04-01 | 1987-05-12 | Corning Glass Works | Optical fiber formed of MgO--Al2 O3 --SiO2 glass |
US4782491A (en) * | 1987-04-09 | 1988-11-01 | Polaroid Corporation | Ion doped, fused silica glass fiber laser |
US4820018A (en) * | 1987-10-30 | 1989-04-11 | Gte Laboratories Incorporated | Optical fiber for light amplification |
DE3820217A1 (en) * | 1988-06-14 | 1989-12-21 | Rheydt Kabelwerk Ag | Optical waveguide, especially monomode fibre |
US5005175A (en) * | 1989-11-27 | 1991-04-02 | At&T Bell Laboratories | Erbium-doped fiber amplifier |
US5027079A (en) * | 1990-01-19 | 1991-06-25 | At&T Bell Laboratories | Erbium-doped fiber amplifier |
WO1991013038A1 (en) * | 1990-02-28 | 1991-09-05 | Otc Limited | A rare-earth doped fibre |
US5058976A (en) * | 1990-08-03 | 1991-10-22 | At&T Bell Laboratories | System comprising Er-doped optical fiber |
JP3049077B2 (en) * | 1990-08-22 | 2000-06-05 | 住友電気工業株式会社 | Functional optical fiber |
US5148510A (en) * | 1990-11-28 | 1992-09-15 | Corning Incorporated | Optical fiber made of galliobismuthate glasses and optical devices using same |
US5119460A (en) * | 1991-04-25 | 1992-06-02 | At&T Bell Laboratories | Erbium-doped planar optical device |
GB2273389B (en) * | 1992-12-14 | 1996-07-17 | Pirelli Cavi Spa | Rare earth doped optical fibre amplifiers |
-
1992
- 1992-12-14 GB GB9226024A patent/GB2273389B/en not_active Expired - Fee Related
-
1993
- 1993-11-19 US US08/154,957 patent/US5491581A/en not_active Expired - Fee Related
- 1993-12-01 AU AU52091/93A patent/AU666983B2/en not_active Ceased
- 1993-12-02 NZ NZ250346A patent/NZ250346A/en unknown
- 1993-12-02 DK DK93119433T patent/DK0602467T3/en active
- 1993-12-02 EP EP93119433A patent/EP0602467B1/en not_active Expired - Lifetime
- 1993-12-02 ES ES93119433T patent/ES2119853T3/en not_active Expired - Lifetime
- 1993-12-02 NZ NZ299758A patent/NZ299758A/en unknown
- 1993-12-02 DE DE69318523T patent/DE69318523T2/en not_active Expired - Fee Related
- 1993-12-08 CA CA002110930A patent/CA2110930C/en not_active Expired - Fee Related
- 1993-12-14 JP JP5313692A patent/JPH06250243A/en active Pending
- 1993-12-14 BR BR9305307A patent/BR9305307A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPH06250243A (en) | 1994-09-09 |
CA2110930C (en) | 1999-07-20 |
DE69318523T2 (en) | 1998-12-17 |
GB2273389B (en) | 1996-07-17 |
AU666983B2 (en) | 1996-02-29 |
EP0602467B1 (en) | 1998-05-13 |
DE69318523D1 (en) | 1998-06-18 |
DK0602467T3 (en) | 1999-03-01 |
EP0602467A1 (en) | 1994-06-22 |
AU5209193A (en) | 1994-06-23 |
BR9305307A (en) | 1994-06-21 |
NZ250346A (en) | 1997-01-29 |
GB2273389A (en) | 1994-06-15 |
US5491581A (en) | 1996-02-13 |
NZ299758A (en) | 1998-04-27 |
ES2119853T3 (en) | 1998-10-16 |
GB9226024D0 (en) | 1993-02-10 |
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