连续变量相干光通信中的联合调制编码系统(英文)

System of Joint Modulation Code in Continuous Variable Coherent Optical Communication

根据单束光连续变量相干光通信的编码要求,提出一种联合磁光调制和电光调制的联合调制系统;根据Stokes参量与邦加球的映射关系以及Stokes矩阵理论,分析了该系统的编码原理,构造了单光束相干光通信系统,并根据编码的需要设计了相关的磁光调制器驱动控制电路和随机数产生电路.最后利用零差检测技术测量Stokes参量;将发送码与接收码进行整形处理后,得到误码率小于3.60%的通信效果,证明了该联合调制实验方案的可行性.为连续变量密钥分配提供一种简捷的编码方法.

Based on the encoding requirements of the continuous variable coherent optical communication in the single beam light,a novel encoding scheme by the joint modulation including magneto-optic modulation and electro-optic modulation was proposed.According to the mapping relationship between Stokes parameters and Poincare sphere,the coding principle of the joint modulation is analyzed in Stokes matrix theory.Then a single beam optical system is set up for encoding.And based on the needs of encoding,a driving circuit of magneto-optic modulatior and a circuit of random number generator are designed.By homodyne detection technique,the Stokes parameters are measured,and the error rate is estimated by LabVIEW procedure.The raw data show that the error rate is lower than 3.60%,which verify the feasibility of the encoding scheme.