Patent ID: 9377559
Filing Date: 2016-06-28
CPC Classification: G01H,G01V

Claim Text:
1. An acoustic sensing system comprising: an optical fiber; at least one pair of reflectors including a first detector and a second detector distributed along the optical fiber at specific areas where acoustic energy data is sought; a source of coherent radiation in operable communication with the optical fiber; and a detector in operable communication with the optical fiber configured to detect a wavelength of coherent radiation reflected from each of the first and second reflectors including a portion of the wavelength of coherent radiation reflected from the one of the first and second reflectors arranged nearer the detector and a portion of the wavelength of coherent radiation reflected from the other of the first and second reflectors arranged reflector further from the detector, wherein the acoustic sensing system determines a change in distance between the first reflector and the second reflector caused by acoustic energy based on differences in the wavelength of coherent radiation reflected from each of the first and second reflectors.