A new fiber optic modular sensing system for pressure, strain, and temperature measurements

The paper presents a modular fiber optic sensing system to measure temperature, hydrostatic pressure and/or strain based on polarimetric highly birefringent fiber operating at infrared wavelengths. The main idea of such a system is a new replaceable fiber-optic head, which allows adjusting the measuring system both to the required range and type (strain, pressure or temperature) of the external measurand. The outputs of the modular sensing system characteristics have been optimized in view of enhancing their measurement capabilities and in order to minimize disturbing environmental effects.