Fiber optic distributed vibration sensing with wavenumber sensitivity correction
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United States of America Patent
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Jan 30, 2018
Grant Date -
May 26, 2016
app pub date -
Jun 13, 2014
filing date -
Jun 13, 2013
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Abstract
An apparatus and method for correcting the wavenumber sensitivity of a distributed fiber optic sensor are disclosed. The distributed fiber optic sensor is deployed in a region of interest to measure a characteristic of an incident acoustic wavefield. A composite response of the distributed sensor is determined based on backscatter optical signals generated by the sensor, where the composite response is indicative of a characteristic of an incident acoustic wavefield. The composite response includes at least a first response having a first wavenumber sensitivity and a second response having a second wavenumber sensitivity. The second wavenumber sensitivity is selected so that wavenumber notches of the first and second responses do not overlap.
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