Long wavelength, pure silica core single mode fiber and method of forming the same
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United States of America Patent
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Sep 20, 2005
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app pub date -
May 6, 2004
filing date -
May 6, 2004
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Abstract
An optical fiber suitable to support single mode optical transmission at longer wavelengths (e.g., 1550 nm) is formed to comprise a pure silica core region and a 'down doped' cladding layer. The core region is defined as having a diameter d and the cladding layer is defined has having an outer diameter D. In accordance with the present invention, single mode propagation will be supported when D/d>8.5, and is preferably in the range of 9-10.
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