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Multi-parameter fiber optic sensor for use in harsh environments

  • US 5,892,860 A
  • Filed: 01/21/1997
  • Issued: 04/06/1999
  • Est. Priority Date: 01/21/1997
  • Status: Expired due to Term
First Claim
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1. A multi-parameter sensor for sensing at least one of a plurality of measurand fields in an environment, comprising:

  • a tubularly enclosed optical fiber having a reference means in contact with a reference location in said optical fiber for isolating said reference location in said optical fiber from mechanically induced strain; and

    Bragg grating sensing means, positioned with respect to said reference means, responsive to an optical signal and to a strain associated with a respective measurand field for providing an optical sensing signal related to a magnitude of said respective measurand field.

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