Signal processing methods for an optical detection system

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United States of America

PATENT NO 12196604
APP PUB NO 20230073827A1
SERIAL NO

17766344

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Disclosed is a signal processing method for a distributed acoustic sensing system (DAS), where a scattered signal that was scattered at a scattering location along an optical path is received and interfered with a local oscillator signal to generate a first carrier signal that is modulated by a phase difference between the local oscillator signal and the scattered signal. The first carrier signal is then digitally processed in order to generate a second carrier signal that is modulated by a spatial differential of the phase difference. The spatial differential of the phase difference is directly related to the strain (or acoustic environment) of the optical path at the scattering location, and so enables the strain at the scattering location to be estimated.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Egle, Andris Bristol, GB 2 2
Lewis, Andrew Bristol, GB 50 673
Russell, Stuart Bristol, GB 28 446

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