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Distributed Optical Fibre Sensing

  • US 20130301037A1
  • Filed: 07/11/2013
  • Published: 11/14/2013
  • Est. Priority Date: 07/23/2009
  • Status: Active Grant
First Claim
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1. A distributed optical fibre sensing system comprising:

  • a sensor fibre comprising first and second waveguides extending together along the fibre, the first waveguide being a single mode waveguide and the second waveguide being a multi mode waveguide; and

    an interrogation system coupled to the sensor fibre and arranged to measure one or more physical parameters as a function of position along the sensor fibre by carrying out at least first and second sensing operations to detect properties of probe light backscattered within the first and second waveguides respectively.

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