Patents by Inventor Jean-Philippe De Sandro
Jean-Philippe De Sandro has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8270445Abstract: A light-emitting device is provided which includes a gain medium having an optically-active phosphosilicate glass, wherein the phosphosilicate glass includes at least one active ion dopant and from about 1 to 30 mol % of phosphorus oxide. The phosphorous oxide may be present in an effective amount for reducing any photodarkening effect and increasing the saturation energy of the system. The active ion dopant may be a rare earth dopant. The light-emitting device may include an optical waveguide, the optical waveguide including the gain medium. The optical waveguide may have a core and at least one cladding, and the gain medium having the phosphosilicate glass may be found in the core and/or in one of the cladding.Type: GrantFiled: July 15, 2008Date of Patent: September 18, 2012Assignee: Coractive High-Tech IncInventors: Bertrand Morasse, Jean-Philippe De Sandro, Eric Gagnon, Stephane Chatigny
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Patent number: 8055115Abstract: An optically active glass and an optical fiber comprising such glass, having reduced photodarkening properties are provided. The optically active glass is mainly composed of silica representing from about 50 to 98 mol % of the glass. It also includes at least one active ion, such as a rear-earth ion, which induces a photodarkening effect in optical properties of the glass. Moreover, the glass includes an effective amount of phosphorus oxide providing the photodarkening reducing effect, preferably in an amount of from about 1 to 30 mol %. A method for reducing a photodarkening effect in optical properties of an optically active glass including the step of introducing phosphorus oxide to the glass is also provided.Type: GrantFiled: July 5, 2007Date of Patent: November 8, 2011Assignee: Coractive High-Tech Inc.Inventors: Bertrand Morasse, Jean-Philippe De Sandro, Eric Gagnon
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Publication number: 20100202481Abstract: A light-emitting device is provided which includes a gain medium having an optically-active phosphosilicate glass, wherein the phosphosilicate glass includes at least one active ion dopant and from about 1 to 30 mol % of phosphorus oxide. The phosphorous oxide may be present in an effective amount for reducing any photodarkening effect and increasing the saturation energy of the system. The active ion dopant may be a rare earth dopant. The light-emitting device may include an optical waveguide, the optical waveguide including the gain medium.Type: ApplicationFiled: July 15, 2008Publication date: August 12, 2010Applicant: CORACTIVE HIGH-TECH INCInventors: Bertrand Morasse, Jean-Philippe De Sandro, Eric Gagnon, Stephane Chatigny
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Publication number: 20090011233Abstract: An optically active glass and an optical fiber comprising such glass, having reduced photodarkening properties are provided. The optically active glass is mainly composed of silica representing from about 50 to 98 mol % of the glass. It also includes at least one active ion, such as a rear-earth ion, which induces a photodarkening effect in optical properties of the glass. Moreover, the glass includes an effective amount of phosphorus oxide providing the photodarkening reducing effect, preferably in an amount of from about 1 to 30 mol %. A method for reducing a photodarkening effect in optical properties of an optically active glass including the step of introducing phosphorus oxide to the glass is also provided.Type: ApplicationFiled: July 5, 2007Publication date: January 8, 2009Applicant: CORACTIVE HIGH-TECH INCInventors: Bertrand MORASSE, Jean-Philippe De Sandro, Eric Gagnon, Stephane Chatigny
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Patent number: 7046902Abstract: A large mode field diameter optical fiber is disclosed. It is a single mode optical fiber which has a core and a cladding. The core of this fiber has two regions, an inner core region and an outer core region which has a refractive index lower than that of the inner core region. The inner core region is doped with a rare-earth element, such as Er2O3, and a co-dopant, such as Al2O3, and the outer core region is doped with a dopant such as GeO2. The types and amounts of the dopants and co-dopants are adjusted to obtain a fiber with a mode field diameter greater than 5.5 ?m at a wavelength of 1550 nm.Type: GrantFiled: September 30, 2003Date of Patent: May 16, 2006Assignee: CorActive High-Tech Inc.Inventors: Jean-Philippe De Sandro, Stephane Chatigny, Eric Gagnon, François Chenard
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Publication number: 20050069270Abstract: A large mode field diameter optical fiber is disclosed. It is a single mode optical fiber which has a core and a cladding. The core of this fiber has two regions, an inner core region and an outer core region which has a refractive index lower than that of the inner core region. The inner core region is doped with a rare-earth element, such as Er2O3, and a co-dopant, such as Al2O3, and the outer core region is doped with a dopant such as GeO2. The types and amounts of the dopants and co-dopants are adjusted to obtain a fiber with a mode field diameter greater than 5.5 ?m at a wavelength of 1550 nm.Type: ApplicationFiled: September 30, 2003Publication date: March 31, 2005Inventors: Jean-Philippe De Sandro, Stephane Chatigny, Eric Gagnon, Francois Chenard
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Patent number: 6589895Abstract: A Tm-doped germanate glass composition comprises GeO2 having a concentration of at least 20 mole percent, Tm2O3 having a concentration of about 0.001 mole percent to about 2 mole percent, and Ga2O3, having a concentration of about 2 mole percent to about 40 mole percent. The composition can further include an alkaline earth metal compound selected from the group consisting of MgO, CaO, SrO, BaO, BaF2, MgF2, CaF2, SrF2, BaCl2, MgCl2, CaCl2, SrCl2, BaBr2, MgBr2, CaBr2, SrBr2, and combinations thereof, and having a non-zero concentration of less than about 40 mole percent. The composition can further include an alkali metal compound selected from the group consisting of Li2O, Na2O, K2O, Rb2O, Cs2O, Li2F2, Na2F2, K2F2, Rb2F2, Cs2F2, Li2Cl2, Na2Cl2, K2Cl2, Rb2Cl2, Cs2Cl2, Li2Br2, Na2Br2, K2Br2, Rb2Br2, Cs2Br2 and combinations thereof, and having a non-zero concentration of less than about 20 mole percent.Type: GrantFiled: June 29, 2001Date of Patent: July 8, 2003Assignee: Corning IncorporatedInventors: Matthew J. Dejneka, Jean-Philippe de Sandro, Alexandre M. Mayolet, Bryce N. Samson, Ji Wang
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Publication number: 20030089133Abstract: A method of manufacturing a glass article, such as an optical fiber. The method comprises the steps of providing a glass tube with an annular passage, forming a preform from the glass tube while maintaining the annular passage, and drawing the preform into the glass article such that the annular passage closes during drawing. The preform is formed by the steps of providing glass on an inner surface of the glass tube while maintaining the annular passage and providing glass on an outer surface of the glass tube. The preform has a predetermined value &agr; that is an inner diameter of the preform after providing glass on the inner surface divided by an outer diameter of the glass tube. The preform has a predetermined value &bgr; that is the inner diameter of the preform after providing glass on the inner surface divided by the outer diameter of the preform.Type: ApplicationFiled: May 31, 2002Publication date: May 15, 2003Applicant: CORNING INCORPORATEDInventors: Julie E. Caplen, Jean-Philippe de Sandro, Daniel W. Hawtof
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Publication number: 20030087743Abstract: A Tm-doped germanate glass composition comprises GeO2 having a concentration of at least 20 mole percent, Tm2O3 having a concentration of about 0.001 mole percent to about 2 mole percent, and Ga2O3, having a concentration of about 2 mole percent to about 40 mole percent. The composition can further include an alkaline earth metal compound selected from the group consisting of MgO, CaO, SrO, BaO, BaF2, MgF2, CaF2, SrF2, BaCl2, MgCl2, CaCl2, SrCl2, BaBr2, MgBr2, CaBr2, SrBr2, and combinations thereof, and having a non-zero concentration of less than about 40 mole percent. The composition can further include an alkali metal compound selected from the group consisting of Li2O, Na2O, K2O, Rb2O, Cs2O, Li2F2, Na2F2, K2F2, Rb2F2, Cs2F2, Li2Cl2, Na2Cl2, K2Cl2, Rb2Cl2, Cs2Cl2, Li2Br2, Na2Br2, K2Br2, Rb2Br2, Cs2Br2 and combinations thereof, and having a non-zero concentration of less than about 20 mole percent.Type: ApplicationFiled: June 29, 2001Publication date: May 8, 2003Inventors: Matthew J. Dejneka, Jean-Philippe de Sandro, Alexandre M. Mayolet, Bryce N. Samson, Ji Wang
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Patent number: 6495482Abstract: 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, not over 30 mole percent of SiO2, preferably not over 5 mole percent of La2O3, a ratio of B2O3 to (&Sgr;X2O+&Sgr;YO) that is at least 3.5, preferably 4.5, where X2O represents monovalent metal oxides(s) and YO represents divalent metal oxides, the glass providing a wide useful bandwidth (50 nm and greater) for optical amplification around the 1545 nm region.Type: GrantFiled: May 5, 2000Date of Patent: December 17, 2002Assignee: Corning IncorporatedInventors: Jean-Philippe de Sandro, David Jacob, Michel Prassas