Magnetic Field Sensing Based on Bi-Tapered Optical Fibers Using Spectral Phase Analysis. - Luis A. Herrera-Piad; Joseph W. Haus; Daniel Jáuregui-Vázquez; Juan Manuel Sierra-Hernández; Julián Moisés Estudillo-Ayala; Yanelis Lopez-Dieguez; Roberto Rojas-Laguna (Sensors, 2017)