Corning Incorporated

Jean-Philippe J De Sandro

Prantik Mazumder

Joohyun Koh

Keith Leonard House

Matthew John Dejneka

Ji Wang

Michel Prassas

Alexandre Michel Mayolet

Bryce Neilson Samson

David Jacob

A method and apparatus for providing a uniform coating thickness along an axial direction within an internal portion of a substrate tube is disclosed. A gas delivery unit is configured to coat the internal portion of the substrate tube. The gas delivery unit includes an insert. At least one of an inner diameter of the insert, a length of the insert, a gap between the insert and the substrate tube, and a flow of the gas mixture delivered to the substrate tube is configured to provide the uniform coating thickness along the axial direction.

Method and apparatus for providing a uniform coating thickness along an axial direction within a substrate tube

A method and apparatus for forming a glass article such as an optical fiber having a substantially matching viscosity across an interface associated with a first section and a second section of the optical fiber is disclosed herein. The first section has a first halogen concentration and the second section has a second halogen concentration. At least one of a partial pressure of the second halogen provided to a substrate tube and a temperature of the substrate tube is configured to affect the concentration of the second halogen in the second section. Optical fiber embodiments are also included.

Method and apparatus for reducing stress between depositions within a substrate tube

A Tm-doped germanate glass composition comprises GeO having a concentration of at least 20 mole percent, Tm O having a concentration of about 0.001 mole percent to about 2 mole percent, and Ga O , 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, BaF , MgF , CaF , SrF , BaCl , MgCl , CaCl , SrCl , BaBr , MgBr , CaBr , SrBr , 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 Li O, Na O, K O, Rb O, Cs O, Li F , Na F , K F , Rb F , Cs F , Li Cl , Na Cl , K Cl , Rb Cl , Cs Cl , Li Br , Na Br , K Br , Rb Br , Cs Br and combinations thereof, and having a non-zero concentration of less than about 20 mole percent. The emission bandwidth of the composition in the 1450 nm to 1530 nm range can be varied on the basis of one or more composition ratios. A Tm-doped germanate optical amplifier can amplify optical signals in the S-band region of the electromagnetic spectrum.

Thulium-doped germanate glass composition and device for optical amplification

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 B O , not over 30 mole percent of SiO , preferably not over 5 mole percent of La O , a ratio of B O to (&Sgr;X O&plus;&Sgr;YO) that is at least 3.5, preferably 4.5, where X O 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.

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Beaconsfield, Canada

Jean-Philippe J De Sandro