SYSTEMS AND METHODS FOR DISTRIBUTED PRESSURE SENSING

摘要

A pressure sensing cable in one embodiment includes a polarization maintaining (PM) optic fiber having a length; and a Fiber Bragg Grating (FBG) pair formed in the PM optic fiber. The FBG pair includes a first FBG formed at a location along the length of the optic fiber. The first FBG defines a first wavelength range at which the first FBG is reflective. The FBG pair also includes a second FBG spaced a distance from the first FBG to define a FBG cavity extending between the first FBG and the second FBG. The second FBG defines a second wavelength range at which the second FBG is reflective. The first wavelength range of the first FBG and the second wavelength range of the second FBG at least partially overlap.

主权项

1. A pressure sensing cable comprising:
a polarization maintaining (PM) optic fiber having a length; and a Fiber Bragg Grating (FBG) pair formed in the PM optic fiber comprising:
a first FBG formed at a location along the length of the optic fiber, the first FBG defining a first wavelength range at which the first FBG is reflective; anda second FBG spaced a distance from the first FBG to define a FBG cavity extending between the first FBG and the second FBG, the second FBG defining a second wavelength range at which the second FBG is reflective;wherein the first wavelength range of the first FBG and the second wavelength range of the second FBG at least partially overlap.