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US 7,257,301 B2Granted
Optical fiber
AssigneeBaker Hughes Incorporated
InventorsDaniel Homa, John W. Guarniere, Paul Zerwekh, Brooks Childers, Justin Crusse
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Abstract
An optical fiber resistant to hydrogen-induced attenuation losses at both relatively low and relatively high temperatures includes a substantially pure silica core and a hydrogen retarding layer. The hydrogen retarding coating may be made of carbon, metal, or silicon nitride. The fiber may also include a cladding layer, a second silica layer, and a protective outer sheath.
Claims13
An optical fiber comprising:
- a substantially pure silica core;
- a first intermediate layer comprising a doped silica at least partially surrounding the core;
- a second silica layer at least partially surrounding the first intermediate layer, wherein the second silica layer is not doped;
- and
- a hydrogen resistant layer at least partially surrounding the second silica layer.
2 more elements
Dependencies are inferred from the claim text.