In the receiver, Stokes vectors are extracted from the optical signals in two consecutive symbol periods.Dot product of the two vectors is then obtained so that the transmitted sequence recovered.

• 在接收端，提取前后两个符号周期内光的斯托克斯矢量并将二者点乘，就能提取两个符号周期内偏振状态的差异，恢复发送序列。