Xue-Jian Li, Min Cao, Min Tang, Yue-An Mi, Hong Tao, Hao Gu, Wen-Hua Ren, Wei Jian, Guo-Bin Ren. Inter-mode stimulated Brillouin scattering and simultaneous temperature and strain sensing in M-shaped few-mode fiber [J]. Acta Physica Sinica, 2020, 69(11): 114203-1