Figure 1.

(a) Scanning electron microscopy picture of the pure silica HiBi PCF fiber used as reference for the numerical modeling and demonstration of a hydrostatic pressure sensor; (b) schematic representation of the fiber core showing the fast and slow axis as well as the stress components (σ₁ and σ₂); (c) mesh representing the fiber structure for the finite element analysis–inset: zoom in on the structured region defining the fiber core; (d) stress distribution (σ₂ component) across the fiber core; and (e) numerically calculated electric field distribution for one polarization eigenstate mode.