×

FIBER OPTIC PARTICLE MOTION SENSOR SYSTEM

  • US 20100313658A1
  • Filed: 10/16/2008
  • Published: 12/16/2010
  • Est. Priority Date: 10/16/2007
  • Status: Active Grant
First Claim
Patent Images

1. A sensor apparatus comprising:

  • a sensor containing a section of an optical fiber having at least one grating inscribed therein, the grating characterized by a reflection or transmission peak having a width≦

    100 picometers, wherein a central wavelength of the grating reflection or transmission peak changes in response to an input to the sensor;

    an optical light source coupled to the optical fiber, the light source having a bandwidth ≧

    1 nanometer;

    an interferometer coupled to the optical fiber with a pathlength mismatch equal to or less than a coherence length of light leaving the grating, wherein the interferometer converts changes in wavelength of light from the sensor into changes in optical phase;

    an interrogator coupled to an output of the interferometer providing an electrical output proportional to the input to the sensor.

View all claims
  • 9 Assignments
Timeline View
Assignment View
    ×
    ×