考虑到少模光纤单模工作时具有低非线性以及损耗、色散保持特性, 提出基于少模光纤单模工作的量子-经典信号同传方案.使用Optisystem构建了基于少模光纤单模工作的量子-经典信号同传模型, 分析了其传输性能, 并与现有的基于单模光纤的量子-经典信号同传模型进行了对比.结果表明所提模型可以有效降低现有模型中的非线性效应和信号串扰, 将误比特率降低了两个数量级, 显著提高了信号的传输质量, 可用于量子保密通信大规模网络化.

In consideration of low nonlinearity and maintaining of loss and dispersion when few-mode fiber is operated in single mode, the coexistence scheme of quantum-classical signals based on few-mode fiber operated in single mode was put forward. The coexistence model of quantum-classical signals based on few-mode fiber operated in single mode was built by Optisystem. The transmission performance of the model was analysed and compared with the existing model based on single-mode fiber. The result shows that the nonlinearity and signal crosstalk in existing model have been reduced efficiently in the proposed model. The bit error rate is two orders of magnitude lower than existing model and the transmission quality is improved obviously. It is suitable to apply the proposed model to massive network realization of quantum private communication.