Magnetic Field Measurement With Improved Scale Factor Based on a Dual-Loop Optoelectronic Oscillator With Vernier Effect Using a Cascaded GMM-FBG and Monel-400-FBG. - Beilei Wu; Xiaotong Zhao; Shiying Xiao; Muguang Wang; Bin Yin; Pufeng Gao; Zixiao Wang; Fengping Yan (IEEE Trans. Instrum. Meas., 2024)