×

Optical reading system and method for spectral multiplexing of resonant waveguide gratings

  • US 6,829,073 B1
  • Filed: 10/20/2003
  • Issued: 12/07/2004
  • Est. Priority Date: 10/20/2003
  • Status: Expired due to Fees
First Claim
Patent Images

1. A reading system comprising:

  • a light source for directing a light beam into a grating-based waveguide sensor; and

    a detector for receiving a reflected light beam from the grating-based waveguide sensor that was tuned to have a resonance at a predetermined spectral location by adjusting a skew angle defined as an angle between a plane of incidence of the light beam directed into the grating-based waveguide sensor and a grating vector which is perpendicular to lines of a diffraction grating within the grating-based waveguide sensor, wherein said detector is used to analyze the reflected light beam so as to detect a resonant condition which corresponds to a predetermined refractive index that indicates whether a biological substance is located on a surface of the grating-based waveguide sensor.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×