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Fiber optic sensor using a hollow core fiber

  • US 8,233,151 B2
  • Filed: 09/12/2011
  • Issued: 07/31/2012
  • Est. Priority Date: 08/20/2002
  • Status: Expired due to Term
First Claim
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1. An optical sensor system comprising:

  • an optical coupler configured to split a first optical signal into a second optical signal and a third optical signal; and

    an optical waveguide having a hollow core generally surrounded by a cladding, the optical waveguide receiving the second optical signal and the third optical signal, the cladding of the optical waveguide substantially confining the second optical signal and the third optical signal within the hollow core, wherein interference between the second optical signal and the third optical signal after the second optical signal and the third optical signal have counterpropagated through the optical waveguide is responsive to perturbation of at least a portion of the optical waveguide.

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