G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 13/22 (2006.01) G01N 21/21 (2006.01) G08B 3/10 (2006.01) G08B 25/08 (2006.01)
Patent
CA 2471803
A preferred apparatus and method is presented in which a distributed fiber optic sensor is used in order to detect a disturbance along its length. A pulse of polarized light is launched into an optical fiber; as the pulse propagates along the optical fiber, it continuously loses a small portion of its energy due to Rayleigh backscatter. The Rayleigh backscattered light is analyzed using a polarization sensitive element such as a fiber polarizer. The dynamics of the time dependence of the polarization analyzed backscattered light is used to ascertain if there has been a disturbance along the length of the optical fiber. This technique can be used for applications in areas such as fiber optic telecommunications, perimeter security, fire detection, and pipelines.
Ridout & Maybee Llp
Senstar Corporation
Senstar-Stellar Corporation
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