Waterproof optical fiber chemical sensor and method of making sa

Details Waterproof optical fiber chemical sensor and method of making sa Waterproof optical fiber chemical sensor and method of making sa

1990-03-28

1992-04-28

Healy, Brian

Optical waveguides

Optical waveguide sensor

385123, 385145, 422 8211, 427163, 25022711, 25022714, 128634, 252582, 21050025, 21050027, G02B 602, G01N 2100, H01J 516, A61B 500

Patent

active

051094428

ABSTRACT:
A fiber optic chemical sensor is made water repellent by attaching a plurality of long, hydrophobic chains, e.g. silane polymers, to the surface. The chains extend from the surface and form a semi-permeable barrier which repels water molecules while selectively passing analyte molecules therethrough. In one configuration, the hydrophobic chains are attached substantially uniformly over the clad. In a second configuration, the clad is a plurality of spaced stripes with the hydrophobic chains attached in the gaps between the stripes. In another configuration, a patterned hydrophobic coating of alternating thick and thin segments is formed on the clad.

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