CPC E21B 47/135 (2020.05) [G01V 8/16 (2013.01); G02B 6/2931 (2013.01); H04B 10/25 (2013.01)] | 13 Claims |
1. An optical system for measuring an acoustic signal, comprising:
an optical interrogator configured to transmit a light pulse;
an optical fiber for receiving the light pulse, the optical fiber having a plurality of nominal sites uniformly spaced apart along a longitudinal axis of the optical fiber; and
a plurality of gratings formed in the optical fiber, each of the plurality of gratings associated with a nominal site and separated from its associated nominal site by an offset distance, wherein the offset distance is a random value within a dithering range, the dithering range having an average value of zero, wherein the plurality of gratings comprises a plurality of chirped Fiber Bragg gratings.
|