论文部分内容阅读
提出了一种适用于星载量子密钥分发的偏振无关精跟踪反射结构,反射结构利用旋光晶体和两面材质相同的反射镜实现偏振态的自动补偿。仿真结果显示,普通的反射镜对于偏振态的影响极大,从量子误码率上来看,折射率为1.52的单面精跟踪反射镜将引入40%左右的误码率。而旋光-双反射结构最大仅引入了0.25%的量子误码率,特别是在零偏转附近的量子误码率趋近于零。
A Polarization Independent Reflected Trace Tracking Structure suitable for quantum key distribution in space is proposed. The Polarization Structure is automatically compensated by using an optically active crystal and a mirror with the same material on both sides. The simulation results show that ordinary mirrors have a great influence on the polarization state. From the point of view of quantum error rate, a single-side precision tracking mirror with a refractive index of 1.52 will introduce about 40% bit error rate. However, the maximum of only 0.25% quantum error rate is introduced in the optically active - double reflection structure, especially the quantum error rate close to zero deflection approaches zero.