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US 6,917,740 B2Granted
Optical fiber having reduced viscosity mismatch
AssigneeCorning Incorporated
InventorsHeather D. Boek, Michael T. Murtagh, Sabyasachi Sen
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Abstract
An optical fiber is disclosed in which the core region of the optical fiber is doped with Cl and F in order to reduce the viscosity mismatch between the core region and the adjacent cladding region. In one embodiment of the invention, the optical fiber is a single-mode step index optical fiber having a core region doped with Cl and F in an amount effective to produce a difference in temperature between the glass transition temperature of the core region and the glass transition temperature of the adjacent cladding region of less than about 200° C.
Claims14
An optical fiber comprising:
- a core region having a relative refractive index % Δ1 with respect to pure silica, and a glass transition temperature Tg1;
- a first cladding segment disposed about and in contact with the outer periphery of the core region, wherein the first cladding segment has a relative refractive index %Δ2 with respect to pure silica, and a glass transition temperature Tg2;
- and
- wherein the core region is doped with Cl and F, and the Cl and F are in an amount by wt. % effective to yield a difference between Tg1 and Tg2 of less than about 200° C.
1 more element
Dependencies are inferred from the claim text.