Method and system for enhancing the spatial resolution of a fiber optical distributed acoustic sensing assembly
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United States of America Patent
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Aug 18, 2015
Grant Date -
Oct 11, 2012
app pub date -
Dec 22, 2010
filing date -
Dec 23, 2009
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Abstract
The spatial resolution of a fiber optical Distributed Acoustic Sensing (DAS) assembly is enhanced by:
- arranging an optical DAS fiber with a series of contiguous channels that are sensitive to vibration in a U-shaped loop such that substantially parallel fiber sections include pairs of channels that are arranged at least partially side by side;transmitting a series of light pulses through the optical fiber and receiving back reflections of said light pulses by a light transmission and receiving assembly; andprocessing the received back reflections such that back reflections stemming from at least one pair of channels that are arranged at least partially side by side are correlated to each other.
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