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Optical substance analyzer

  • US 7,212,693 B2
  • Filed: 12/22/2003
  • Issued: 05/01/2007
  • Est. Priority Date: 12/22/2003
  • Status: Active Grant
First Claim
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1. A device, comprising an optical waveguide having a first grating, wherein:

  • at least a portion of the waveguide has a functional layer adapted to bind an analyte;

    a plurality of grooves in the optical waveguide form the first grating;

    at least some of the grooves are covered by the functional layer;

    when the analyte binds to the functional layer, the binding changes optical characteristics of the waveguide;

    the first grating has an optical reflection band characterized by a center wavelength; and

    the binding shifts the center wavelength.

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