Detecting broadside acoustic signals with a fiber optical distributed acoustic sensing (DAS) assembly
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United States of America Patent
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Nov 27, 2018
Grant Date -
Dec 28, 2017
app pub date -
Aug 15, 2017
filing date -
Dec 15, 2011
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Abstract
A distributed fiber optic acoustic sensing system includes a cable having a cable length. The cable has an elongated body having an outer surface, and at least one straight optical fiber extending parallel to a longitudinal axis of the cable along the cable length; and one or more non-straight optical fibers, such as two orthogonal sinusoidal optical fibers extending along the cable length, or a helically wrapped optical fiber extending along the cable length. The sensing system further has light transmitting and receiving means optically connected to the optical fibers.
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