Optical fiber communication 142021/2/19 dE 4、 The leading edge: 02<0红移 The trailing edg dE 移 脉冲顶部 at O positively hirpd1-14 Copyright Wang Yan 2021/2/19 Optical fiber communications 4、The leading edge: The trailing edg 蓝移 脉冲顶部 ： 2 0 d E dt  i  0 2 0 d E dt  i  0 2 0 d E dt = i = 0 红移