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Bragg grating pressure sensor for industrial sensing applications

  • US 20020154860A1
  • Filed: 11/08/2001
  • Published: 10/24/2002
  • Est. Priority Date: 12/04/1998
  • Status: Active Grant
First Claim
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1. A pressure sensor for use in an industrial process, comprising:

  • an optical sensing element, having at least one pressure Bragg Grating disposed therein, said pressure Bragg Grating having a pressure reflection wavelength;

    said sensing element being axially strained due to a change in external pressure, said axial strain causing a change in said pressure reflection wavelength, and said change in said pressure reflection wavelength being indicative of said change in pressure; and

    at least a portion of said sensing element having a transverse cross-section which is contiguous and made of substantially a single material and having an outer transverse dimension of at least 0.3 mm.

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