×

Detecting broadside acoustic signals with a fiber optical distrubuted acoustic sensing (DAS) assembly

  • US 9,494,461 B2
  • Filed: 12/13/2012
  • Issued: 11/15/2016
  • Est. Priority Date: 12/15/2011
  • Status: Active Grant
First Claim
Patent Images

1. A distributed fiber optic acoustic sensing system comprising:

  • a cable comprising an elongated body having an outer surface and a first optical fiber disposed on the outer surface at a first predetermined wrap angle;

    a first sheath layer on the outside of the elongated body and covering the elongated body and the first optical fiber;

    at least a second optical fiber wrapped around the outside of the first sheath layer at a second predetermined wrap angle that is different from the first predetermined wrap angle;

    a second sheath layer on the outside of the first sheath layer and covering the first sheath layer and the second optical fiber; and

    light transmitting and receiving means optically connected to said optical fibers for, respectively, transmitting optical signals into the optical fibers and receiving a backscattered component of said signals out of the optical fibers.

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