Fiber optic distributed vibration sensing with wavenumber sensitivity correction
First Claim
1. A method, comprising:
- providing a distributed fiber optic sensor in a region of interest to measure a characteristic of an incident acoustic wavefield; and
determining, based on backscatter optical signals generated by the distributed fiber optic sensor, a composite response of the distributed fiber optic sensor that is indicative of the characteristic of the incident acoustic wavefield, wherein the composite response includes at least a first response having a first wavenumber sensitivity and a second response having a second wavenumber sensitivity, wherein the second wavenumber sensitivity is selected so that wavenumber notches of the first and second responses do not overlap.
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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.
24 Citations
11 Claims
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1. A method, comprising:
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providing a distributed fiber optic sensor in a region of interest to measure a characteristic of an incident acoustic wavefield; and determining, based on backscatter optical signals generated by the distributed fiber optic sensor, a composite response of the distributed fiber optic sensor that is indicative of the characteristic of the incident acoustic wavefield, wherein the composite response includes at least a first response having a first wavenumber sensitivity and a second response having a second wavenumber sensitivity, wherein the second wavenumber sensitivity is selected so that wavenumber notches of the first and second responses do not overlap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification