The following is an excerpt from Multiphysics Simulation 2017.
To the average person, the phrase might conjure up an image of glowing hairs twisted artistically into a beautiful shape or fountaining out of a lamp holder.
Microstructured fibers show promise for obtaining highly sensitive pressure sensors used in activities such as petroleum exploration, where technicians and engineers can use them to detect fluid pressure.
Figure 1 presents some examples of optical fibers able to act as pressure sensors, as reported in the literature.
Typically, microstructured optical fibers for pressure sensors are configured so that the application of an external load causes an asymmetric stress distribution within the fiber.
This in turn causes variations in the fiber birefringence — a material property referring to an optically anisotropic refractive index — which can be measured for sensing purposes.