supported by the National Natural Science Foundation of China(Grant Nos.62105045 and 62205037);the National Science Fund for Distinguished Young Scholars(Grant No.61825501);Chongqing Natural Science Foundation of Innovative Research Groups(Grant No.cstc2020jcyj-cxttX0005).
We report the numerical and experimental studies of the two-dimensional Brillouin gain spectrum(BGS)distribution deformation induced by the self-phase modulation in the Brillouin optical time domain reflectometry(BOTD...