Luo Yi, Wang Xiao-Lin, Zhang Han-Wei, Su Rong-Tao, Ma Peng-Fei, Zhou Pu, Jiang Zong-Fu. Amplified spontaneous emission characteristics and locations of high temperature vulnerable point in fiber amplifiersJ. Acta Physica Sinica, 2017, 66(23): 234206. DOI: 10.7498/aps.66.234206