Optical fiber for resisting hydrogen-induced loss

Details Optical fiber for resisting hydrogen-induced loss Optical fiber for resisting hydrogen-induced loss

2005-02-15

2005-02-15

Palmer, Phan T. H. (Department: 2874)

Optical waveguides

Optical fiber waveguide with cladding

C385S124000

Reexamination Certificate

active

06856739

ABSTRACT:
The invention provides an optical fiber composition which has a high resistance to aging upon exposure to hydrogen. The inventive optical fiber does not require further treatment steps, such as passivation or hermetic coating, to meet specifications for hydrogen aging. The inventive optical fiber has a core glass composition with a germania doping concentration from 0% to 4% in weight. Decreasing the dopant concentration of germanium increases the resistance of the fiber to hydrogen by reducing the number of germanium defect sites in the core of the fiber. The optical fiber composition is advantageous for rare earth-doped fibers which are particularly sensitive to hydrogen aging.

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