MY199356A - Optical fiber based distributed electromagnetic sensor and method of fabrication thereof - Google Patents

Abstract

An optical fiber sensor (10) for measuring electromagnetic signals comprising a core (12) for guiding optical signals along a length of the core (12) and a cladding layer (14) including a plurality of magnetostrictive materials (16) disposed parallel to and around the core (12). The plurality of magnetostrictive materials (16) disposed parallel to and around the core (12) magnetically induces strain upon expansion or contraction of the magnetostrictive materials (16) causing a frequency shift in Rayleigh backscattered signal through the core (12). The frequency shift in Rayleigh backscattered signal is measured to determine the strength of the electromagnetic signals along the length of the optical fiber. [Figure 1(b)]