US 9,109,944 B2 · Method and system for enhancing the spatial resolution of a fiber optical distributed acoustic sensing assembly

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; and processing 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.

Claims20

Dependent claims

A method for enhancing the spatial resolution of a fiber optical distributed acoustic sensing assembly, the method comprising:

configuring an optical fiber comprising a series of contiguous channels in a U-shaped loop such that the fiber comprises substantially parallel fiber sections with pairs of channels that are arranged at least partially side by side;
inducing a light transmission and receiving assembly to transmit a series of light pulses through the optical fiber and to receive back reflections of the transmitted light pulses reflected by each of the channels;
and
processing 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.

1 more element

Dependencies are inferred from the claim text.

Method and system for enhancing the spatial resolution of a fiber optical distributed acoustic sensing assembly

Life of this patent

Method and system for enhancing the spatial resolution of a fiber optical distributed acoustic sensing assembly

Life of this patent

Abstract

Claims20