Abstract
In this work, a magnetic field measurement sensor based on Faraday rotation effect in TeO2-Li2O-WO3-MoO3-Nb2O5 no-core fiber (TLWMN NCF) is theoretically proposed. Compared with traditional silica fibers, TLWMN NCF has a higher Verdet constant, which makes contributions to improving the sensitivity. Comparative analysis concerning the Verdet constant and sensitivity of the designed sensor and its silica counterpart at different wavelength is presented, where the highest sensitivity of TLWMN NCF at measuring a uniform magnetic field can reach 2.2 × 10−3 rad/Gs at the wavelength of 442 nm, and the value decreases slightly when measuring a non-uniform magnetic field, which is 1.91 × 10−3 rad/Gs. The superior sensitivity and independence of other magnetic sensitive materials attribute the designed sensor an appropriate candidate in terms of magnetic field measurement in numerous fields.
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