06201917 is referenced by 10 patents and cites 7 patents.

An optical fiber preform comprising a core of radius R, and a sheath comprising cladding and outer sheath, wherein the outer sheath comprises an inner zone, and a peripheral zone made of silica doped with alumina and of thickness lying in the range 0.08 R to 2.2 R, and the proportion by weight of alumina in the peripheral zone is such that the equivalent concentration of alumina in the outer sheath as a whole lies in the range 100 ppm to 1000 ppm by weight of aluminum relative to silica. A method of manufacturing said preform, and an associated optical fiber.

Title
Preform including a barrier layer preventing hydrogen from diffusing into optical fiber manufactured from said perform, and a method of preparing such a preform
Application Number
9/329200
Publication Number
6201917 (B1)
Application Date
June 10, 1999
Publication Date
March 13, 2001
Inventor
Gérard Orcel
Laffitte
US
Sophie Dubois
Germain En Laye
US
Jean Florent Campion
Bois Colombes
US
Agent
Sughrue Mion Zinn Macpeak & Seas PLLC
US
Assignee
Alcatel
US
IPC
G02B 6/02
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