Simulation of the Limiting Parameters of Polarimetric Fiber-Optic Current Sensor on a Spun Fiber

The results of a numerical simulation of the limiting parameters of a spun-fiber-based polarimetric fiber-optic current sensor are presented. The technique for simulating sensor parameters is described. The trajectory of change in the polarization state (PS) and the accumulation efficiency of the magneto-optical (MO) sensor response along the fiber are analyzed using the Poincaré sphere approach. The main sensor characteristics depending on the fiber polarization parameters (initial sensitivity, operating measurement range and its symmetry relative to zero current, and shape of the sensor response curve in the measurement range) are presented. The conditions for correction—sensor response linearization by bend-induced birefringence—are described. The influence of the spectral width of the radiation source on the sensor response is modeled.