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Detecting broadside and directional acoustic signals with a fiber optical distributed acoustic sensing (DAS) assembly

  • US 9,080,949 B2
  • Filed: 12/21/2010
  • Issued: 07/14/2015
  • Est. Priority Date: 12/23/2009
  • Status: Active Grant
First Claim
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1. A Distributed Acoustic Sensing (DAS) fiber optical assembly comprising at least two lengths of adjacent optical fiber with different directional acoustic sensitivities wherein the at least two lengths of adjacent optical fiber comprise a first length of optical fiber with a first ratio between its axial and radial acoustic sensitivity and a second length of optical fiber with a second ratio between its axial and radial acoustic sensitivity, wherein the second ratio is different from the first ratio.

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