High-Precision Temperature Sensing Based on Sagnac Interferometer and BPNN in Fiber Ring Laser. - Weihao Lin 001; Deyu Xu; Junjie Bai; Huaxin Gu; Xingwei Chen; Jingming Zhang; Yuhui Liu; Fang Zhao 008; Li-Yang Shao (IEEE Trans. Instrum. Meas., 2025)