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公开(公告)号：FR2793241A1
公开(公告)日：2000-11-10
申请号：FR9905761
申请日：1999-05-06
Applicant: CORNING INC
Inventor： PRASSAS MICHEL , JACOB DAVID , DE SANDRO JEAN PHILIPPE
IPC: C03C3/064 , C03C3/068 , C03C3/07 , C03C3/072 , C03C3/15 , C03C3/155 , C03C3/253 , C03C4/08 , G02B6/00 , H01S3/067 , H01S3/16 , H01S3/17 , G02B6/16
Abstract: A glass composition well suited for use in optical amplification consists of an erbium-doped borate glass composition comprising at least 30 mole percent of B2O3. This family of glasses provides a wide useful bandwidth (50 nm and greater) for optical amplification around the 1545 nm region. One preferred sub-family of glasses contains equal to or less than 30 mol. percent of SiO2. Another preferred sub-family of glasses contains equal to or less than 5 mol.% of La2O3 and the ratio of B2O3 to ( SIGMA X2O + SIGMA YO) is greater than or equal to 3.5, more preferably 4.5, where X2O represents monovalent metal oxide(s) and YO represents divalent metal oxides.
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公开(公告)号：BR9811411A
公开(公告)日：2000-08-22
申请号：BR9811411
申请日：1998-09-12
Applicant: CORNING INC
Inventor： PRASSAS MICHEL
IPC: C03C3/247 , C03C4/00 , C03C4/12 , H01S3/06 , H01S3/067 , H01S3/16 , H01S3/17 , H01S3/00 , C03C3/23
Abstract: The invention relates to a family of erbium-doped fluorophosphate glasses for use in optical signal amplification. The composition, based on 100 parts by weight, is constituted by: P2O5 15-40, A12O3 0-5, MgO 0-9, CaO 0-9, SrO 0-9, BaO 0-45, AlF3 5-25, MgF2 0-10, CaF2 0-25, SrF2 0-25, BaF2 0-20, KHF2 0-2, K2TiF6 0-2, with up to 10 parts by weight of erbium oxide. The glasses according to the present invention exhibit a high gain and a very flat spectrum over the 1550 nm bandwidth, as compared to the glasses of the figure. These glass compositions are particularly well suited for use in fiber or planar optical amplification in WDM and similar applications.
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公开(公告)号：AU3387899A
公开(公告)日：1999-10-25
申请号：AU3387899
申请日：1999-04-08
Applicant: CORNING INC
Inventor： DICKINSON JAMES E JR , ELLISON ADAM J , MAYOLET ALEXANDRE M , PRASSAS MICHEL
IPC: G02B6/00 , C03B27/004 , C03C3/06 , C03C3/062 , C03C3/095 , C03C3/11 , C03C3/112 , C03C3/12 , C03C3/14 , C03C3/23 , C03C3/253 , C03C13/04 , H01S3/06
Abstract: A glass consisting essentially of antimony oxide. An optically active glass consisting essentially of antimony oxide and up to about 4 mole % of an oxide of a rare earth element. A rare earth-doped, antimony oxide-containing glass including 0-99 mole % SiO2, 0-99 mole % GeO2, 0-75 mole % (Al, Ga)2O3, 0.5-99 mole % Sb2O3, and up to about 4 mole % of an oxide of a rare earth element. The oxide of the rare earth element may comprise Er2O3. The glass of the invention further includes fluorine, expressed as a metal fluoride. An optical energy-producing or light-amplifying device, in particular, an optical amplifier, comprising the above-described glass. The optical amplifier can be either a fiber amplifier or a planar amplifier, either of which may have a hybrid composition. Embodiments of the glass of the invention can be formed by conventional glass making techniques, while some of the high content antimony oxide embodiments are formed by splat or roller quenching.
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公开(公告)号：DE69510114T2
公开(公告)日：1999-10-14
申请号：DE69510114
申请日：1995-02-23
Applicant: CORNING INC
Abstract: This invention is directed to photochromic glasses which darken to a brown coloration upon exposure to actinic radiation, which glasses have a refractive index of about 1.6, and Abbe number between 42-47, a density less than 2.82 g/cm³, and are preferably essentially free of Ti0₂. The glass compositions consist generally, in weight percent, of:Si0₂43-52K₂02-9Nb₂0₅0-5B₂0₃12.5-18Mg00-5Ag0.100-0.175Al₂0₃0-3Ca00-5Cl0.140-0.350Zr0₂6-14Sr00-9Br0.093-0.195Li0₂1.5-3.5Ba00-9Cu00.008-0.030Na₂00-3
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公开(公告)号：AU8776398A
公开(公告)日：1999-04-23
申请号：AU8776398
申请日：1998-08-12
Applicant: CORNING INC
Inventor： JACOB DAVID , PRASSAS MICHEL
IPC: G02B27/28 , H01S3/06 , H01S3/10 , H04B10/291 , H04B10/297 , H04J14/02 , H04N7/22 , H01S3/00 , G02F1/35
Abstract: There is proposed an optical amplifier apparatus particularly for use in networks distributing signals by optical fibers, comprising first and second parallel optical branches (1, 2), the first optical branch (1) including optical amplifier means (5, 6) for amplifying digital signals and the second optical branch including optical amplifier means (7) for amplifying analogue signals, the optical amplifier means (5, 6) of the first optical path (1) being adapted to amplify bi-directional digital signals and the optical amplifier means (7) of the second optical branch (2) being adapted to amplify unidirectional analogue signals.
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Patent Agency Ranking
公开(公告)号：AU9104098A
公开(公告)日：1999-03-29
申请号：AU9104098
申请日：1998-08-12
Applicant: CORNING INC
Inventor： PRASSAS MICHEL
IPC: C03C3/247 , C03C4/00 , C03C4/12 , H01S3/06 , H01S3/067 , H01S3/16 , H01S3/17 , H01S3/00 , C03C3/23
Abstract: The invention relates to a family of erbium-doped fluorophosphate glasses for use in optical signal amplification. The composition, based on 100 parts by weight, is constituted by: P2O5 15-40, A12O3 0-5, MgO 0-9, CaO 0-9, SrO 0-9, BaO 0-45, AlF3 5-25, MgF2 0-10, CaF2 0-25, SrF2 0-25, BaF2 0-20, KHF2 0-2, K2TiF6 0-2, with up to 10 parts by weight of erbium oxide. The glasses according to the present invention exhibit a high gain and a very flat spectrum over the 1550 nm bandwidth, as compared to the glasses of the figure. These glass compositions are particularly well suited for use in fiber or planar optical amplification in WDM and similar applications.
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公开(公告)号：CA2297331A1
公开(公告)日：1999-03-18
申请号：CA2297331
申请日：1998-08-12
Applicant: CORNING INC
Inventor： PRASSAS MICHEL
IPC: C03C3/247 , C03C4/00 , C03C4/12 , H01S3/06 , H01S3/067 , H01S3/16 , H01S3/17 , H01S3/00 , H04B10/17 , C03C3/23
Abstract: The invention relates to a family of erbium-doped fluorophosphate glasses for use in optical signal amplification. The composition, based on 100 parts by weight, is constituted by: P2O5 15-40, A12O3 0-5, MgO 0-9, CaO 0-9, SrO 0-9, BaO 0-45, AlF3 5-25, MgF2 0-10, CaF2 0-25, SrF2 0-25, BaF2 0-20, KHF2 0-2, K2TiF6 0-2, with up to 10 parts by weight of erbium oxide. The glasses according to the present invention exhibit a high gain and a very flat spectrum over the 1550 nm bandwidth, as compared to the glasses of the figure. These glass compositions are particularly well suited for use in fiber or planar optical amplification in WDM and similar applications.
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公开(公告)号：FR2738237B1
公开(公告)日：1997-11-14
申请号：FR9510343
申请日：1995-09-04
Applicant: CORNING INC
Inventor： PRASSAS MICHEL , KERDONCUFF ALAIN , GILLE CLAUDE FRANCOIS MAURICE
IPC: C03B17/02 , C03B32/00 , C03B37/012 , C03B19/02
Abstract: According to the invention, a) at least the first and second compositions of this material in the fluid phase are prepared, b) a sheet (61) of the first composition is poured continuously onto a flat support (4), c) a sheet (62) of the second composition is poured continuously onto sheet (61) of the first composition, and d) the thermal interdiffusion of the materials of the two sheets is ensured so as to obtain the desired gradient of composition in the cooled bar.
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公开(公告)号：DE69400713T2
公开(公告)日：1997-04-03
申请号：DE69400713
申请日：1994-01-15
Applicant: CORNING INC
Inventor： GRATEAU LUC , PRASSAS MICHEL
Abstract: A photochromic glass with the compsn. (wt.%, oxide basis) 52-58 SiO2, 16-21 B2O3, 6-9 Al2O3, 1.5-2.8 ZrO2, 2-3.5 Li2O, 0-2.5 Na2O, 4-8 K2O, 2-3.5 CaO and 1.2-2.5 TiO2, with 0.15-0.25 wt.% Ag, 0.06-0.13 wt.% Br, 0.25-0.40 wt.% Cl and 0.003-0.007 wt.% CuO as photochromic components and 2-10 ppm Au and up to 0.9% Er2O3 displays a pink hue in the darkened state, and bodies at 2 mm cross section have optical properties comprising: (i) luminous transmittance over 82% when undarkened, (ii) 20-32% and 35-55% darkened luminous transmittance after 15 min. exposure to actinic radiation at 25 deg. C and 40 deg. C respectively, (iii) a recovery of at least 30% in transmittance, to at least 50% transmittance, 5 min. after removal from exposure, and (iv) x and y trichromatic coordinates of 0.3500-0.3700 and 0.3250-0.3450 respectively.
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公开(公告)号：BR9501142A
公开(公告)日：1995-10-17
申请号：BR9501142
申请日：1995-03-21
Applicant: CORNING INC
Abstract: This invention is directed to photochromic glasses which darken to a brown coloration upon exposure to actinic radiation, which glasses have a refractive index of about 1.6, and Abbe number between 42-47, a density less than 2.82 g/cm³, and are preferably essentially free of Ti0₂. The glass compositions consist generally, in weight percent, of:Si0₂43-52K₂02-9Nb₂0₅0-5B₂0₃12.5-18Mg00-5Ag0.100-0.175Al₂0₃0-3Ca00-5Cl0.140-0.350Zr0₂6-14Sr00-9Br0.093-0.195Li0₂1.5-3.5Ba00-9Cu00.008-0.030Na₂00-3
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