Patent ID: 11874145
Assignee: BAKER HUGHES OILFIELD OPERATIONS LLC
Field: Measurement (Instruments)
Classification: CPC G  E | IPC E  G

Claim 0:
1. An optical system for measuring an acoustic signal in a wellbore, comprising:
a light source for generating a light pulse at a central wavelength;
an optical fiber having a first end for receiving the light pulse from the light source and a plurality of enhancement scatterers spaced along a length of the optical fiber, each of the plurality of enhancement scatterers reflecting the light pulse at the central wavelength, wherein a longitudinal density of the enhancement scatterers increases with a distance from the first end to increase a signal enhancement generated by the enhancement scatterers distal from the first end; and
a detector at the first end for measuring a reflection of the light pulse at the enhancement scatterers to determine the acoustic signal.