Patent ID: 9651709
Date: 2017-05-16
CPC Classifications: E21B,G01V

Claim:
1. A distributed acoustic sensing system, comprising: a pulse generator configured to generate optical pulses; a first optical fiber coupled to the pulse generator, the first optical fiber configured to selectively receive the an optical pulse from the pulse generator based on activation of a first optical gain element, the first optical fiber comprising a first coating configured to alter a length of the first optical fiber when exposed to an electromagnetic signal; a second optical fiber coupled to the pulse generator, the second optical fiber configured to selectively receive an optical pulse from the pulse generator based on activation of a second optical gain element; an interferometer coupled to the first optical fiber and the second optical fiber, the interferometer configured to receive backscattered light from the an optical pulse traveling through the first optical fiber or the second optical fiber, the interferometer comprising: a photodetector assembly coupled to the interferometer, the photodetector assembly configured to detect backscattered light from the interferometer and generate an electronic signal based on the backscattered light; and an information handling system, which: