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Waterproof optical fiber chemical sensor and method of making same

  • US 5,109,442 A
  • Filed: 03/28/1990
  • Issued: 04/28/1992
  • Est. Priority Date: 03/28/1990
  • Status: Expired due to Fees
First Claim
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1. A water repellent fiber optic chemical sensor apparatus, comprising:

  • a fiber optic chemical sensor having a fiber optic core and a fiber optic clad thereon;

    a plurality of long, hydrophobic chains attached to, and extending from, the surface of the fiber optic chemical sensor to repel water molecules from the sensor surface while selectively allowing preselected analyte molecules to reach the sensor surface;

    wherein the clad is a substantially uniform clad on the surface of the sensor and the hydrophobic chains are attached substantially uniformly over the clad; and

    wherein the fiber optic chemical sensor is a refractive index sensor in which the clad is a thin metal clad.

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