On the induced phase shift of dynamically forced optical fibers: theory and numerical simulation

In this paper, we present a formulation and numerical simulation for the phase shift of light as it is passed through dynamically forced optical fibers. A generalized representation for the induced phase shift, as well as a finite element model appropriate for an isotropic, arbitrarily oriented fiber is developed. These general expressions are then specialized to the particular case of a straight, finite length of fiber, which is forced normally along its entire length. Calculations are carried out for three quite different fiber configurations over a spectrum of frequencies, and the resulting phase and strain responses are presented and discussed.