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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.
According to the coding requirements of single-beam continuous-variable coherent optical communication, a joint modulation system combining magneto-optical modulation and electro-optic modulation is proposed. According to the mapping relationship between Stokes parameters and Bunge-Balls and Stokes matrix theory, the coding principle of the system is analyzed , A single-beam coherent optical communication system is constructed, and the relevant magneto-optical modulator drive control circuit and random number generation circuit are designed according to the coding requirements. Finally, Stokes parameters are measured by homodyne detection technique. The transmission codes and reception codes are shaped After processing, the communication effect with bit error rate less than 3.60% is obtained, which proves the feasibility of the joint modulation experiment scheme and provides a simple and easy coding method for continuous variable key distribution.