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Description
Optical fibers used in high-precision interferometric systems are highly sensitive to external mechanical deformations. These environmental perturbations induce unwanted optical phase shifts, which severely limit the stability of the system. Therefore, accurately predicting this strain-induced phase shift is critical for designing vibration-insensitive optical components. This work investigates the opto-mechanical sensitivity of multilayered optical fibers. While the response of these fibers has been modeled and validated under static conditions, real-world environmental perturbations are inherently dynamic. Building upon this static framework, this study extends to the dynamic opto-mechanical behavior of the fiber. We present dynamic interferometric measurements conducted on a straight fiber subjected to controlled lateral mechanical excitations. To evaluate our predictive capabilities, the measured dynamic phase response is compared with predictions derived from a numerical modeling of the mechanical behavior coupled with an analytical modeling of the induced optical phase shift. This process is applied to series of interferometer configurations including a straight tense fiber transversely excited at one hand, a fiber glued to a 2D vibrated plate following different types of pathways, targeting an optimal configuration for which the optical phase shift is minimized.