Reinforced and chemically resistant optical filament

Details Reinforced and chemically resistant optical filament Reinforced and chemically resistant optical filament

1981-11-02

1985-03-12

Sikes, William L.

350 9634, G02B 514

Patent

active

045041130

ABSTRACT:
This invention relates to an improved optical filament waveguide providing increased strength and resistance to moisture and chemical attack. This improved optical filament waveguide is particularly useful in the severe environment encountered in wellbore logging operations. This optical filament waveguide is the result of coating, preferably at a temperature below 500.degree. C., an optical filament rod with a relatively thin protective coating of a metal oxide whose coefficient of thermal expansion is of the same order of magnitude as that of the rod.

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Skaggs, Rev. int. hautes Temper. Refract., vol. 16, France, 1979, "Zero and Low Coefficient of Thermal Expansion Polycrystalline Oxides," pp. 157-167.

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