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US 6,687,444 B2Granted
Decreased H2 sensitivity in optical fiber
AssigneeCorning Incorporated
InventorsA. Joseph Antos, Cynthia B. Giroux, Timothy L. Hunt, Dale R. Powers, Christine L. Tennent, William A. Whedon
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Abstract
Disclosed is a method of making a hydrogen resistant optical waveguide fiber. The soot preform is heated and immersed in a metal halide gas. A reduced metal species is thus incorporated into the glass soot prior to sintering or consolidation of the soot preform. A hydrogen absorption band around 1530 nm is substantially eliminated from waveguides made from a precursor gas treated preform.
Claims3
A hydrogen resistant optical waveguide fiber comprising:
- a central core region surrounded by and in contact with a clad region, both of said core region and said clad region comprising a silica based glass;
- wherein said fiber exhibits less than 0.05 dB/km increased attenuation at 1530 nm after exposure to a 1% hydrogen atmosphere for 6 days without a hermetic coating applied to said fiber.
Dependencies are inferred from the claim text.